{ "name": "MetroMap dataset", "description": "How metro systems were built, one record per line-phase, with cited construction dates and costs.", "site": "metromap.trevorhinkle.com", "generatedAt": "2026-07-14T20:36:11.525Z", "citation": "MetroMap by Trevor Hinkle — metromap.trevorhinkle.com. Curated data licensed CC BY 4.0; line geometry © OpenStreetMap contributors (ODbL).", "license": { "curated": { "name": "CC BY 4.0", "url": "https://creativecommons.org/licenses/by/4.0/" }, "geometry": { "name": "ODbL 1.0", "url": "https://opendatacommons.org/licenses/odbl/1-0/", "attribution": "© OpenStreetMap contributors" } }, "cityCount": 12, "lineCount": 122, "cities": [ { "bbox": [ 4.72, 52.27, 5.06, 52.42 ], "center": [ 4.9041, 52.3676 ], "country": "Netherlands", "defaultZoom": 10.6, "homeCurrency": "EUR", "id": "amsterdam", "lines": [ { "cityId": "amsterdam", "color": "#FF0000", "displayNumber": "53", "formerNumbers": [ "Oostlijn (east branch)" ], "id": "amsterdam-line-53", "name": { "en": "Gaasperplas Line", "nl": "Gaasperplaslijn" }, "phases": [ { "confidence": "medium", "constructionStart": "1970", "geometryRef": "amsterdam-53", "id": "amsterdam-53-1977", "kind": "initial", "label": { "en": "Oostlijn opens: Weesperplein → Gaasperplas" }, "notes": "Opened as the eastern branch of the (then unnumbered) Oostlijn. The shared 1977 Oostlijn construction cost is recorded once on line 54’s 1977 phase to avoid double-counting. [Date chase 2026-06-12] Construction start dated to 1970 by the ceremonial 'eerste paal' (first pile) driven by Secretary of State Mike Keyzer at Rhijnspoorplein. Three Wikipedia sources agree on 1970, though none carry inline citations; UrbanRail.net's '1960s' framing reflects the 1968 planning decision. [Opening-date chase 2026-06-13] Sources disagree on the exact day: 14 Oct 1977 (NL Metrolijn 53, EN Line 53 body, EN Amsterdam Metro, NL Amsterdamse metro) vs 16 Oct 1977 (NL Oostlijn, UrbanRail.net, EN Line 53 infobox). Year 1977 is unanimous; the well-cited consensus is 14 October.", "opened": "1977-10-14", "segment": { "fromStopIndex": 3, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260524171316/https://nl.wikipedia.org/wiki/Metrolijn_53", "kind": "wikipedia", "quote": "Het traject Weesperplein – Gaasperplas werd op 14 oktober 1977 geopend en verving de drukke buslijn 56.", "tier": "secondary", "title": "Metrolijn 53 — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/Metrolijn_53" }, { "accessedAt": "2026-06-01", "archivedUrl": "https://web.archive.org/web/20260611111106/https://en.wikipedia.org/wiki/Amsterdam_Metro", "kind": "wikipedia", "title": "Amsterdam Metro — Wikipedia (system opened 14 Oct 1977)", "url": "https://en.wikipedia.org/wiki/Amsterdam_Metro" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260613160432/https://nl.wikipedia.org/wiki/Oostlijn", "kind": "other", "publisher": "Wikipedia (nl)", "quote": "De bouw startte in 1970.", "tier": "secondary", "title": "Oostlijn — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/Oostlijn", "via": "https://nl.wikipedia.org/wiki/Metrolijn_53" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260524165439/https://nl.wikipedia.org/wiki/Amsterdamse_metro", "kind": "other", "publisher": "Wikipedia (nl)", "quote": "De bouw begon in 1970 toen staatssecretaris Mike Keyzer op het Rhijnspoorplein de eerste paal sloeg.", "tier": "secondary", "title": "Amsterdamse metro — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/Amsterdamse_metro", "via": "https://en.wikipedia.org/wiki/Amsterdam_Metro" } ], "stationCount": 10 }, { "confidence": "medium", "geometryRef": "amsterdam-53", "id": "amsterdam-53-1980", "kind": "extension", "label": { "en": "Extended north to Amsterdam Centraal" }, "opened": "1980-10-11", "segment": { "fromStopIndex": 0, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-06-01", "archivedUrl": "https://web.archive.org/web/20260308014821/https://en.wikipedia.org/wiki/Line_53_(Amsterdam_Metro)", "kind": "wikipedia", "quote": "An extension to Amsterdam Centraal was completed on 11 October 1980.", "tier": "secondary", "title": "Line 53 (Amsterdam Metro) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Line_53_(Amsterdam_Metro)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260524003916/https://urbanrail.net/eu/nl/ams/amsterdam.htm", "kind": "other", "publisher": "UrbanRail.net", "quote": "Three years later, on 11 Oct 1980, both lines reached the Centraal Station.", "tier": "tertiary", "title": "UrbanRail.Net > Europe > Netherlands > Amsterdam Metro", "url": "https://www.urbanrail.net/eu/nl/ams/amsterdam.htm", "via": "https://en.wikipedia.org/wiki/Line_53_(Amsterdam_Metro)" } ], "stationCount": 4 } ], "sources": [ { "accessedAt": "2026-06-01", "archivedUrl": "https://web.archive.org/web/20260308014821/https://en.wikipedia.org/wiki/Line_53_(Amsterdam_Metro)", "kind": "wikipedia", "tier": "secondary", "title": "Line 53 (Amsterdam Metro) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Line_53_(Amsterdam_Metro)" } ] }, { "cityId": "amsterdam", "color": "#FCFB05", "displayNumber": "54", "formerNumbers": [ "Oostlijn (south branch)" ], "id": "amsterdam-line-54", "name": { "en": "Gein Line", "nl": "Geinlijn" }, "phases": [ { "confidence": "high", "constructionStart": "1970", "cost": { "basis": "estimate", "confidence": "high", "nominal": { "currency": "NLG", "isEstimate": false, "value": 815000000, "year": 1972 }, "notes": "Construction cost of the ENTIRE 1977 Oostlijn (East Line), shared by lines 53 and 54 — no line-specific figure is published, so it is recorded once here (line 53’s 1977 phase carries no cost to avoid double-counting). Originally budgeted ƒ410M; final cost reported at >ƒ815M (1972 report) — ~ƒ185M budget overrun + ~ƒ225M wage/price inflation. [Citation chase 2026-06-11] The ƒ815M figure is a revised cost projection announced by Alderman Lammers on 21 Dec 1972 during construction (line opened 1977), so it represents a contemporary estimate rather than a verified final out-turn; consider setting isEstimate=true.", "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260611111424/https://www.digibron.nl/viewer/collectie/Digibron/id/tag:RD.nl,19721221:newsml_41f836936a784acd56c88eeaf4df0d1b", "kind": "news", "quote": "De aanleg van de oostlijn van de metro in Amsterdam gaat niet de oorspronkelijk geraamde 410 miljoen, maar ruim 815 miljoen gulden kosten.", "tier": "secondary", "title": "Reformatorisch Dagblad / Digibron — Oostlijn metro Amsterdam kostenoverschrijding (1972)", "url": "https://www.digibron.nl/viewer/collectie/Digibron/id/41f836936a784acd56c88eeaf4df0d1b" }, { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260611111106/https://en.wikipedia.org/wiki/Amsterdam_Metro", "kind": "wikipedia", "quote": "Construction of the Oostlijn (East Line) began in 1970 as the first phase of Amsterdam’s metro system.", "tier": "secondary", "title": "Amsterdam Metro — Wikipedia", "url": "https://en.wikipedia.org/wiki/Amsterdam_Metro" } ] }, "geometryRef": "amsterdam-54", "id": "amsterdam-54-1977", "kind": "initial", "label": { "en": "Oostlijn opens: Weesperplein → Holendrecht" }, "notes": "[Date chase 2026-06-12] Construction start 1970 reflects the Oostlijn (Lines 53+54 built together) as a whole, not Line 54's southern Gein/Holendrecht segment alone. UrbanRail.net gives the broader 'second half of the 1960s' framing. [Opening-date chase 2026-06-13] 14 October 1977 was the festive royal inauguration (Friday) by Princess Beatrix and Prince Claus; nl:Oostlijn and UrbanRail.net give 16 October 1977 as the in-service/revenue start (Sunday). Day-level distinction (ceremonial vs revenue service); year unaffected.", "opened": "1977-10-14", "segment": { "fromStopIndex": 3, "toStopIndex": 12 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20251209114829/https://www.treinreiziger.nl/amsterdamse-metro-bestaat-35-jaar/", "kind": "news", "quote": "Op vrijdag 14 oktober 1977 werd de eerste Amsterdamse metrolijn (de Oostlijn) feestelijk geopend door prinses Beatrix en prins Claus.", "tier": "secondary", "title": "treinreiziger.nl — Amsterdamse metro bestaat 35 jaar", "url": "https://www.treinreiziger.nl/amsterdamse-metro-bestaat-35-jaar/" }, { "accessedAt": "2026-06-01", "archivedUrl": "https://web.archive.org/web/20260611111106/https://en.wikipedia.org/wiki/Amsterdam_Metro", "kind": "wikipedia", "title": "Amsterdam Metro — Wikipedia", "url": "https://en.wikipedia.org/wiki/Amsterdam_Metro" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260613160432/https://nl.wikipedia.org/wiki/Oostlijn", "kind": "other", "publisher": "Wikipedia (Dutch)", "quote": "De bouw startte in 1970.", "tier": "secondary", "title": "Oostlijn — Wikipedia (nl)", "url": "https://nl.wikipedia.org/wiki/Oostlijn", "via": "https://en.wikipedia.org/wiki/Line_54_(Amsterdam_Metro)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260524003916/https://urbanrail.net/eu/nl/ams/amsterdam.htm", "kind": "other", "publisher": "UrbanRail.net", "quote": "Construction started in the second half of the 1960s.", "tier": "tertiary", "title": "UrbanRail.Net > Europe > Netherlands > Amsterdam Metro", "url": "https://www.urbanrail.net/eu/nl/ams/amsterdam.htm", "via": "https://en.wikipedia.org/wiki/Line_54_(Amsterdam_Metro)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260524171317/https://nl.wikipedia.org/wiki/Metrolijn_54", "kind": "other", "publisher": "Wikipedia (Dutch)", "quote": "Het traject Weesperplein – Holendrecht werd op 14 oktober 1977 geopend en verving de drukke buslijn 55.", "tier": "secondary", "title": "Metrolijn 54 — Wikipedia (nl)", "url": "https://nl.wikipedia.org/wiki/Metrolijn_54", "via": "https://en.wikipedia.org/wiki/Line_54_(Amsterdam_Metro)" } ], "stationCount": 11 }, { "confidence": "medium", "geometryRef": "amsterdam-54", "id": "amsterdam-54-1980", "kind": "extension", "label": { "en": "Extended north to Amsterdam Centraal" }, "notes": "[Opening-date chase 2026-06-13] nl:Oostlijn is a lone outlier giving 12 October 1980 vs the well-supported 11 October 1980; treated as a likely error in that article.", "opened": "1980-10-11", "segment": { "fromStopIndex": 0, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-06-01", "archivedUrl": "https://web.archive.org/web/20260210104258/https://en.wikipedia.org/wiki/Line_54_(Amsterdam_Metro)", "kind": "wikipedia", "quote": "An extension to Amsterdam Centraal was completed on 11 October 1980.", "tier": "tertiary", "title": "Line 54 (Amsterdam Metro) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Line_54_(Amsterdam_Metro)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260524171317/https://nl.wikipedia.org/wiki/Metrolijn_54", "kind": "other", "publisher": "Wikipedia (Dutch)", "quote": "Op 11 oktober 1980 volgde de verlenging van Weesperplein naar Centraal Station", "tier": "secondary", "title": "Metrolijn 54 — Wikipedia (nl)", "url": "https://nl.wikipedia.org/wiki/Metrolijn_54", "via": "https://en.wikipedia.org/wiki/Line_54_(Amsterdam_Metro)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260524003916/https://urbanrail.net/eu/nl/ams/amsterdam.htm", "kind": "other", "publisher": "UrbanRail.net", "quote": "Three years later, on 11 Oct 1980, both lines reached the Centraal Station.", "tier": "tertiary", "title": "UrbanRail.Net > Europe > Netherlands > Amsterdam Metro", "url": "https://www.urbanrail.net/eu/nl/ams/amsterdam.htm", "via": "https://en.wikipedia.org/wiki/Line_54_(Amsterdam_Metro)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613160432/https://nl.wikipedia.org/wiki/Oostlijn", "kind": "other", "publisher": "Wikipedia (Dutch)", "quote": "Op 12 oktober 1980 volgde de verlenging naar het Centraal Station.", "tier": "secondary", "title": "Oostlijn — Wikipedia (nl)", "url": "https://nl.wikipedia.org/wiki/Oostlijn", "via": "https://en.wikipedia.org/wiki/Line_54_(Amsterdam_Metro)" } ] }, { "confidence": "medium", "geometryRef": "amsterdam-54", "id": "amsterdam-54-1982", "kind": "extension", "label": { "en": "Extended south: Holendrecht → Gein" }, "opened": "1982-08-27", "segment": { "fromStopIndex": 12, "toStopIndex": 14 }, "sources": [ { "accessedAt": "2026-06-01", "archivedUrl": "https://web.archive.org/web/20260210104258/https://en.wikipedia.org/wiki/Line_54_(Amsterdam_Metro)", "kind": "wikipedia", "quote": "The final segment, from Holendrecht to Gein, opened on 27 August 1982.", "tier": "tertiary", "title": "Line 54 (Amsterdam Metro) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Line_54_(Amsterdam_Metro)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260524003916/https://urbanrail.net/eu/nl/ams/amsterdam.htm", "kind": "other", "publisher": "UrbanRail.net", "quote": "The 54 branch was extended to Gein on 27 Aug 1982, after Spaklerweg station had been added on 4 June 1982.", "tier": "tertiary", "title": "UrbanRail.Net > Europe > Netherlands > Amsterdam Metro", "url": "https://www.urbanrail.net/eu/nl/ams/amsterdam.htm", "via": "https://en.wikipedia.org/wiki/Line_54_(Amsterdam_Metro)" } ], "stationCount": 4 } ], "sources": [ { "accessedAt": "2026-06-01", "archivedUrl": "https://web.archive.org/web/20260210104258/https://en.wikipedia.org/wiki/Line_54_(Amsterdam_Metro)", "kind": "wikipedia", "tier": "secondary", "title": "Line 54 (Amsterdam Metro) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Line_54_(Amsterdam_Metro)" } ] }, { "cityId": "amsterdam", "color": "#F69931", "displayNumber": "51", "id": "amsterdam-line-51", "name": { "en": "Amstelveen Line / Ring", "nl": "Amstelveenlijn" }, "phases": [ { "confidence": "high", "constructionStart": "1987", "cost": { "basis": "estimate", "confidence": "low", "nominal": { "currency": "NLG", "isEstimate": true, "value": 130000000, "year": 1990 }, "notes": "Rough estimate — the 1990 Amstelveenlijn sneltram's original build cost is poorly documented. Secondary sources cite ≈ƒ130M (the State contributing ƒ54M); a 1984 planning nota mentioned ~ƒ250M but bundled several lines. Treat as indicative. Pre-construction estimate (ƒ130M expected; ƒ54M national government, remainder City of Amsterdam). [Citation chase 2026-06-11] The cited Wikipedia article \"Planvorming van de Amsterdamse metro\" does not actually contain the ƒ130M / ƒ54M figures (zero refs for the relevant statement), and all attempted corroborating sources (schomakers.net, NVBS/Op de Rails 1988, Delpher/Het Parool) were 404 or inaccessible — so the value is currently untraceable and should be treated as a rough, unverified secondary-source pre-construction estimate.", "sources": [ { "accessedAt": "2026-06-01", "archivedUrl": "https://web.archive.org/web/20260611111711/https://nl.wikipedia.org/wiki/Planvorming_van_de_Amsterdamse_metro", "kind": "wikipedia", "title": "Planvorming van de Amsterdamse metro — Wikipedia (nl)", "url": "https://nl.wikipedia.org/wiki/Planvorming_van_de_Amsterdamse_metro" } ] }, "geometryRef": "amsterdam-51", "id": "amsterdam-51-1990", "kind": "initial", "label": { "en": "Amstelveenlijn opens (sneltram) to Amstelveen" }, "notes": "[Date chase 2026-06-12] Construction start of August 1987 is corroborated by a contemporaneous De Telegraaf article ('Blokkade tegen sneltram', 21 Aug 1987) cited by EN Wikipedia, and by the official Amstelveenlijn project authority confirming 1987 as the build-decision/start year. The De Telegraaf source via Delpher resolver returned HTTP 403 and could not be read directly; its metadata (title/date/page) is confirmed from the page title. [Opening-date chase 2026-06-13] Three distinct Dec-1990 milestones: 30 Nov 1990 official/ceremonial opening; 1 Dec 1990 free-rides open day (the curated date); 2 Dec 1990 first day of paid revenue service per Dutch Wikipedia. Year unambiguous across all sources.", "opened": "1990-12-01", "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260115235631/https://nl.wikipedia.org/wiki/Metro/sneltramlijn_51", "kind": "wikipedia", "quote": "Official opening: 30 november 1990 ... Regular service commenced 2 december 1990", "tier": "secondary", "title": "Metro/sneltramlijn 51 — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/Metro/sneltramlijn_51" }, { "accessedAt": "2026-06-01", "archivedUrl": "https://web.archive.org/web/20260206170817/https://en.wikipedia.org/wiki/Line_51_(Amsterdam_Metro)", "kind": "wikipedia", "quote": "The line officially opened on 30 November 1990 ... The line was expected to cost 130 million Dutch guilder, with the government paying 54 million guilder", "tier": "secondary", "title": "Line 51 (Amsterdam Metro) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Line_51_(Amsterdam_Metro)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260613160427/https://www.delpher.nl/nl/kranten/view?coll=ddd&identifier=ddd:011207585:mpeg21:a0149", "kind": "news", "publisher": "De Telegraaf", "quote": "Blokkade tegen sneltram — De Telegraaf, 21 augustus 1987, pagina 6 (article dated 21 August 1987, directly contemporaneous with construction start protests)", "tier": "primary", "title": "Blokkade tegen sneltram (Blockade against express tram)", "url": "https://resolver.kb.nl/resolve?urn=ddd:011207585:mpeg21:a0149", "via": "https://en.wikipedia.org/wiki/Line_51_(Amsterdam_Metro)" }, { "accessedAt": "2026-06-12", "kind": "primary", "publisher": "Projectorganisatie Amstelveenlijn (operator project body)", "quote": "Het Rijk, Amsterdam en Amstelveen besloten in 1987 de Amstelveenlijn aan te leggen. Lijn 51 ging in december 1990 in gebruik.", "tier": "primary", "title": "Voorgeschiedenis — Amstelveenlijn.nl (archived)", "url": "https://web.archive.org/web/20130902225746/https://www.amstelveenlijn.nl/achtergrond---voorgeschiedenis/achtergrond---voorgeschiedenis", "via": "https://nl.wikipedia.org/wiki/Metro/sneltramlijn_51" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613160432/https://www.delpher.nl/nl/kranten/view?coll=ddd&identifier=ABCDDD:010833313:mpeg21:p001", "kind": "news", "publisher": "Het Parool", "quote": "Sneltram is toch niet snel genoeg (article dated 30 November 1990, cited in Dutch Wikipedia as reference for the official opening on that date)", "tier": "primary", "title": "Sneltram is toch niet snel genoeg — Het Parool, 30 november 1990", "url": "https://resolver.kb.nl/resolve?urn=ABCDDD:010833313:mpeg21:p001", "via": "https://nl.wikipedia.org/wiki/Metro/sneltramlijn_51" } ], "stationCount": 17 }, { "confidence": "low", "geometryRef": null, "id": "amsterdam-51-2004", "kind": "extension", "label": { "en": "Extended to Westwijk" }, "opened": "2004-09-13", "sources": [ { "accessedAt": "2026-06-01", "archivedUrl": "https://web.archive.org/web/20260206170817/https://en.wikipedia.org/wiki/Line_51_(Amsterdam_Metro)", "kind": "wikipedia", "quote": "The extension of the line to Westwijk was completed in September 2004.", "tier": "secondary", "title": "Line 51 (Amsterdam Metro) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Line_51_(Amsterdam_Metro)" } ] }, { "confidence": "medium", "geometryRef": null, "id": "amsterdam-51-2019", "kind": "renumber", "label": { "en": "Amstelveen branch closed; rerouted west to Isolatorweg" }, "notes": "Reroute onto the existing 1997 Ringlijn western leg (Zuid→Isolatorweg); no new metro construction, so no construction cost is attributed. The former Amstelveen branch closed 2 Mar 2019 and was converted to tram line 25 (out of scope). [Opening-date chase 2026-06-13] EN Wikipedia gives 2 March 2019 as the final day of the old Amstelveen branch; the new west-bound route to Isolatorweg began 3 March 2019 (the curated date).", "opened": "2019-03-03", "sources": [ { "accessedAt": "2026-06-01", "archivedUrl": "https://web.archive.org/web/20260206170817/https://en.wikipedia.org/wiki/Line_51_(Amsterdam_Metro)", "kind": "wikipedia", "quote": "Metro 51 kept its original route from Amsterdam Centraal to Zuid, and instead of branching off to Amstelveen, it continues west-bound and ends at Isolatorweg", "tier": "secondary", "title": "Line 51 (Amsterdam Metro) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Line_51_(Amsterdam_Metro)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260216232143/https://www.nhnieuws.nl/nieuws/241367/nog-een-paar-ritjes-en-dan-is-het-over-voor-lijn-51-tussen-amsterdam-en-amstelveen", "kind": "news", "publisher": "NH Nieuws", "quote": "Lijn 51 rijdt vanaf morgen niet meer tussen Amstelveen Westwijk en station Amsterdam Zuid (article dated 2 March 2019, confirming change takes effect 3 March 2019)", "tier": "primary", "title": "Nog een paar ritjes en dan is het over voor lijn 51 tussen Amsterdam en Amstelveen — NH Nieuws", "url": "https://www.nhnieuws.nl/nieuws/241367/nog-een-paar-ritjes-en-dan-is-het-over-voor-lijn-51-tussen-amsterdam-en-amstelveen", "via": "https://en.wikipedia.org/wiki/Line_51_(Amsterdam_Metro)" } ] } ], "sources": [ { "accessedAt": "2026-06-01", "archivedUrl": "https://web.archive.org/web/20260206170817/https://en.wikipedia.org/wiki/Line_51_(Amsterdam_Metro)", "kind": "wikipedia", "tier": "secondary", "title": "Line 51 (Amsterdam Metro) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Line_51_(Amsterdam_Metro)" } ] }, { "cityId": "amsterdam", "color": "#29AB4D", "displayNumber": "50", "id": "amsterdam-line-50", "name": { "en": "Ring Line", "nl": "Ringlijn" }, "phases": [ { "confidence": "medium", "constructionStart": "1992", "cost": { "basis": "estimate", "confidence": "medium", "nominal": { "currency": "NLG", "isEstimate": true, "value": 500000000, "year": 1993 }, "notes": "Estimated total construction cost as reported in 1993 (~ƒ100M already spent by then). The final figure is not firmly sourced (~ƒ400–500M). Line 50 serves 20 stations but only 9 (the Ringlijn arc Zuid→Isolatorweg) were newly built for it; the rest reuse 1977/1982 Oostlijn and 1990 Amstelveenlijn track. ~ƒ500M is a contemporaneous 1993 estimate. [Citation chase 2026-06-11] Contemporary source (Reformatorisch Dagblad, 22 Sept 1993) explicitly states the total construction cost was \"geraamd op circa 500 miljoen gulden\" (estimated at ~ƒ500M) for the full 20.5 km Ringlijn — confirming this is a mid-construction 1993 estimate, not a final outturn, which remains unconfirmed.", "sources": [ { "accessedAt": "2026-06-01", "archivedUrl": "https://web.archive.org/web/20260611112002/https://www.digibron.nl/viewer/collectie/Digibron/id/tag:RD.nl,19930922:newsml_58351285a640761d5bd2606a0578c136", "kind": "news", "title": "Ringlijn Amsterdam in 1997 in bedrijf — Reformatorisch Dagblad, 22 Sep 1993 (Digibron)", "url": "https://www.digibron.nl/viewer/collectie/Digibron/id/tag:RD.nl,19930922:newsml_58351285a640761d5bd2606a0578c136" } ] }, "geometryRef": "amsterdam-50", "id": "amsterdam-50-1997", "kind": "initial", "label": { "en": "Ringlijn opens: Isolatorweg ↔ Gein" }, "notes": "[Date chase 2026-06-12] Construction-start year 1992 independently corroborated by Geheugen van West (Amsterdam heritage archive, Erik Swierstra, 2004), beyond the two Wikipedia sources. Note: Wikipedia's sole inline reference for the 1992 start is the offline 'Projectleider ringlijn' document with no accessible URL. [Opening-date chase 2026-06-13] Ceremonial opening by Minister Jorritsma on 28 May 1997; revenue/passenger service began 1 June 1997 (curated date). EN Wikipedia infobox uses the 28 May ceremonial date, but prose on both EN and NL Wikipedia, plus the Amsterdam Metro overview article, confirm 1 June 1997 for passenger transport.", "opened": "1997-06-01", "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260611122805/https://nl.wikipedia.org/wiki/Metrolijn_50", "kind": "wikipedia", "quote": "negen nieuwe stations", "tier": "secondary", "title": "Metrolijn 50 — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/Metrolijn_50" }, { "accessedAt": "2026-06-01", "archivedUrl": "https://web.archive.org/web/20260611122814/https://en.wikipedia.org/wiki/Line_50_(Amsterdam_Metro)", "kind": "wikipedia", "title": "Line 50 (Amsterdam Metro) — Wikipedia (official opening 28 May 1997, service 1 June 1997)", "url": "https://en.wikipedia.org/wiki/Line_50_(Amsterdam_Metro)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260611111106/https://en.wikipedia.org/wiki/Amsterdam_Metro", "kind": "other", "publisher": "Wikipedia (English)", "quote": "Opened on 1 June 1997, the Ringlijn (Ring Line or Circle Line)", "tier": "secondary", "title": "Amsterdam Metro — Wikipedia", "url": "https://en.wikipedia.org/wiki/Amsterdam_Metro", "via": "https://en.wikipedia.org/wiki/Line_50_(Amsterdam_Metro)" } ], "stationCount": 9 } ], "sources": [ { "accessedAt": "2026-06-01", "archivedUrl": "https://web.archive.org/web/20260611122814/https://en.wikipedia.org/wiki/Line_50_(Amsterdam_Metro)", "kind": "wikipedia", "tier": "secondary", "title": "Line 50 (Amsterdam Metro) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Line_50_(Amsterdam_Metro)" } ] }, { "cityId": "amsterdam", "color": "#00ADEF", "displayNumber": "52", "id": "amsterdam-line-52", "name": { "en": "North/South Line", "nl": "Noord/Zuidlijn" }, "phases": [ { "confidence": "high", "constructionStart": "2003-04-22", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "EUR", "isEstimate": false, "value": 3100000000, "year": 2009 }, "notes": "Final cost ≈ €3.1 billion, denominated at 2009 price levels (per cited sources), versus an original estimate of ≈ €1.46 billion. Delays and Vijzelgracht building subsidence (2008) drove major overruns. Planned to open 2011; opened 2018. Final total ≈ €3.1bn (2009 prices); original budget ~€1.46bn (>40% overrun). Opened to public 22 Jul 2018 (official ceremony 21 Jul). [Citation chase 2026-06-11] The €3.1bn final total is corroborated by Railway PRO (2018), but the \"2009 prices\" price-year denomination rests solely on the now-inaccessible Gemeente Amsterdam primary source (wijnemenjemee.nl, dead/redirected; not captured in Wayback) and could not be independently verified; Railway PRO rounds the original estimate to €1.4bn (curated: €1.46bn).", "sources": [ { "accessedAt": "2026-06-01", "archivedUrl": "https://web.archive.org/web/20231216205218/https://www.railwaypro.com/wp/amsterdam-completes-eur-3-1-billion-metro-line/", "kind": "news", "title": "Amsterdam completes €3.1 billion metro line — Railway PRO", "url": "https://www.railwaypro.com/wp/amsterdam-completes-eur-3-1-billion-metro-line/" }, { "accessedAt": "2026-06-01", "archivedUrl": "https://web.archive.org/web/20260611111106/https://en.wikipedia.org/wiki/Amsterdam_Metro", "kind": "wikipedia", "quote": "the total cost estimate has been adjusted to €3.1 billion (at 2009 prices).", "tier": "tertiary", "title": "Amsterdam Metro — Wikipedia", "url": "https://en.wikipedia.org/wiki/Amsterdam_Metro" } ] }, "geometryRef": "amsterdam-52", "id": "amsterdam-52-2018", "kind": "initial", "label": { "en": "Noord/Zuidlijn opens: Noord ↔ Zuid" }, "notes": "[Date chase 2026-06-12] Construction start corrected from 2002 to 22 April 2003; 2002 was the council's definitive approval vote (9 Oct 2002). Year granularity: 2003. Construction-start corrected 2002→2003-04-22 [Date chase 2026-06-12 — panel-confirmed, corrected w/ sign-off] [Opening-date chase 2026-06-13] Ceremonial/official opening 21 July 2018 (mayor's inauguration + public open day, ~60,000 visitors, no fare service); revenue/scheduled service began the next day, 22 July 2018 — the curated date.", "opened": "2018-07-22", "sources": [ { "accessedAt": "2026-06-01", "archivedUrl": "https://web.archive.org/web/20260308014858/https://en.wikipedia.org/wiki/Line_52_(Amsterdam_Metro)", "kind": "wikipedia", "quote": "The line was officially opened on 21 July 2018 by the mayor of Amsterdam, Femke Halsema and was opened to the public on the next day, 22 July 2018.", "tier": "tertiary", "title": "Line 52 (Amsterdam Metro) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Line_52_(Amsterdam_Metro)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260312180044/https://nl.wikipedia.org/wiki/Geschiedenis_van_de_Noord/Zuidlijn", "kind": "other", "publisher": "Wikipedia (Dutch)", "quote": "22 april 2003 || Aanleg Noord/Zuidlijn officieel van start. [...] Met de daadwerkelijke aanleg werd begonnen in april 2003.", "tier": "secondary", "title": "Geschiedenis van de Noord/Zuidlijn — Wikipedia (Dutch)", "url": "https://nl.wikipedia.org/wiki/Geschiedenis_van_de_Noord/Zuidlijn", "via": "https://nl.wikipedia.org/wiki/Metrolijn_52" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20240717221007/https://nos.nl/artikel/2242534-noord-zuidlijn-geopend-er-is-veel-gevraagd-van-amsterdammers.html", "kind": "news", "publisher": "NOS", "quote": "Morgen gaat de dienstregeling in en kunnen reizigers tussen Amsterdam-Noord en station Zuid, dwars door het centrum en onder het IJ, de metrolijn nemen. [Ceremonial opening 21 July; public service starting 22 July]", "tier": "secondary", "title": "Noord/Zuidlijn geopend en er is veel gevraagd van Amsterdammers", "url": "https://nos.nl/artikel/2242534-noord-zuidlijn-geopend-er-is-veel-gevraagd-van-amsterdammers.html", "via": "https://en.wikipedia.org/wiki/Line_52_(Amsterdam_Metro)" } ], "stationCount": 8 } ], "sources": [ { "accessedAt": "2026-06-01", "archivedUrl": "https://web.archive.org/web/20260308014858/https://en.wikipedia.org/wiki/Line_52_(Amsterdam_Metro)", "kind": "wikipedia", "tier": "secondary", "title": "Line 52 (Amsterdam Metro) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Line_52_(Amsterdam_Metro)" } ] } ], "name": { "en": "Amsterdam", "nl": "Amsterdam" } }, { "bbox": [ 2.04, 41.27, 2.25, 41.48 ], "center": [ 2.17, 41.39 ], "country": "Spain", "defaultZoom": 11, "homeCurrency": "EUR", "id": "barcelona", "lines": [ { "cityId": "barcelona", "color": "#C8102E", "displayNumber": "L1", "id": "barcelona-line-L1", "name": { "en": "L1 (Hospital de Bellvitge ↔ Fondo)", "nl": "Línia 1" }, "phases": [ { "confidence": "low", "constructionStart": "1923-02-05", "geometryRef": "barcelona-L1", "id": "barcelona-l1-1926", "kind": "initial", "label": { "en": "Metro Transversal opens: Bordeta → Catalunya" }, "notes": "Barcelona's first metro, the 'Metro Transversal' (Ferrocarril Metropolitano de Barcelona Transversal), opened Catalunya–Bordeta on 10 June 1926. No reliable peseta-era construction cost for this 1920s line is available online (archival-only: ATM / TMB historical records), so no cost figure is recorded — treat as UNKNOWN. [Date chase 2026-06-12] 1922 was the year of the Royal Order authorizing the project; construction itself began 5 February 1923 per Catalan Wikipedia citing Salmeron 1992 (pp.50-51) and TMB's 'Breu Historia del metro 1920-2010'. TMB primary source offline; archived copy blocked. Construction-start corrected 1922→1923-02-05 [Date chase 2026-06-12 — panel-confirmed, corrected w/ sign-off]", "opened": "1926-06-10", "segment": { "fromStopIndex": 8, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260312134041/https://en.wikipedia.org/wiki/Barcelona_Metro_line_1", "kind": "wikipedia", "quote": "1926 – Bordeta-Catalunya section opened.", "tier": "tertiary", "title": "Barcelona Metro line 1 — Wikipedia (opened 10 Jun 1926)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_1" } ], "stationCount": 8 }, { "confidence": "low", "geometryRef": "barcelona-L1", "id": "barcelona-l1-1932", "kind": "extension", "label": { "en": "Extension: Catalunya → Arc de Triomf (Urquinaona)" }, "opened": "1932-07-01", "segment": { "fromStopIndex": 15, "toStopIndex": 17 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260312134041/https://en.wikipedia.org/wiki/Barcelona_Metro_line_1", "kind": "wikipedia", "quote": "1932 – Bordeta-Santa Eulàlia and Catalunya-Arc de Triomf sections opened.", "tier": "tertiary", "title": "Barcelona Metro line 1 — Wikipedia (Catalunya–Arc de Triomf 1 Jul 1932)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_1" } ], "stationCount": 2 }, { "confidence": "low", "geometryRef": "barcelona-L1", "id": "barcelona-l1-1933", "kind": "extension", "label": { "en": "Extension: Arc de Triomf → Marina" }, "opened": "1933-04-01", "segment": { "fromStopIndex": 17, "toStopIndex": 18 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260312134041/https://en.wikipedia.org/wiki/Barcelona_Metro_line_1", "kind": "wikipedia", "quote": "1933 – Arc de Triomf-Marina section opened.", "tier": "tertiary", "title": "Barcelona Metro line 1 — Wikipedia (Arc de Triomf–Marina 1 Apr 1933)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_1" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "barcelona-L1", "id": "barcelona-l1-1951", "kind": "extension", "label": { "en": "Extension: Marina → Glòries" }, "notes": "[Opening-date chase 2026-06-13] Marina–Glòries segment actually extended to Clot on 23 June 1951; both Glòries and Clot opened this date (labelling nuance, not a date issue).", "opened": "1951-06-23", "segment": { "fromStopIndex": 18, "toStopIndex": 19 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260312134041/https://en.wikipedia.org/wiki/Barcelona_Metro_line_1", "kind": "wikipedia", "quote": "1951 – Marina-Clot section opened.", "tier": "tertiary", "title": "Barcelona Metro line 1 — Wikipedia (Marina–Glòries 23 Jun 1951)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_1" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "barcelona-L1", "id": "barcelona-l1-1952-54", "kind": "extension", "label": { "en": "Extension: Glòries → Fabra i Puig (Navas, La Sagrera, Fabra i Puig)" }, "notes": "[Opening-date chase 2026-06-13] Phase opened in staged sub-steps: Navas 8 May 1953, La Sagrera 26 Jan 1954, Fabra i Puig (terminus) 15 May 1954. Curated date picks La Sagrera's mid-phase opening; the terminus reached 15 May 1954. English Wikipedia history prose erroneously dates Navas to 1952, but its own station table and all other sources give 8 May 1953.", "opened": "1954-01-26", "segment": { "fromStopIndex": 19, "toStopIndex": 23 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260312134041/https://en.wikipedia.org/wiki/Barcelona_Metro_line_1", "kind": "wikipedia", "quote": "1954 – Navas-Fabra i Puig section opened.", "tier": "tertiary", "title": "Barcelona Metro line 1 — Wikipedia (Clot/Navas 8 May 1952; La Sagrera–Fabra i Puig 26 Jan 1954)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_1" } ], "stationCount": 4 }, { "confidence": "low", "geometryRef": "barcelona-L1", "id": "barcelona-l1-1968", "kind": "extension", "label": { "en": "Extension: Fabra i Puig → Torras i Bages (Sant Andreu)" }, "opened": "1968-03-14", "segment": { "fromStopIndex": 23, "toStopIndex": 25 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260312134041/https://en.wikipedia.org/wiki/Barcelona_Metro_line_1", "kind": "wikipedia", "quote": "1968 – Fabra i Puig-Torras i Bages section opened.", "tier": "tertiary", "title": "Barcelona Metro line 1 — Wikipedia (Sant Andreu, Torras i Bages 14 Mar 1968)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_1" } ], "stationCount": 2 }, { "confidence": "low", "geometryRef": "barcelona-L1", "id": "barcelona-l1-1983-north", "kind": "extension", "label": { "en": "North extension: Torras i Bages → Santa Coloma (Trinitat Vella, Baró de Viver)" }, "notes": "[Opening-date chase 2026-06-13] Northern extension to Santa Coloma opened 21 December 1983 per three concordant sources (curated shows 23 Dec, which is the southern extension date). The two 1983 extensions opened two days apart: north 21 Dec, south 23 Dec. Recommend correcting curated date to 1983-12-21.", "opened": "1983-12-23", "segment": { "fromStopIndex": 25, "toStopIndex": 28 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260312134041/https://en.wikipedia.org/wiki/Barcelona_Metro_line_1", "kind": "wikipedia", "quote": "1983 – Torras i Bages-Santa Coloma and Santa Eulàlia-Torrassa sections opened.", "tier": "tertiary", "title": "Barcelona Metro line 1 — Wikipedia (Trinitat Vella–Santa Coloma Dec 1983)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_1" } ], "stationCount": 3 }, { "confidence": "low", "geometryRef": "barcelona-L1", "id": "barcelona-l1-1983-south", "kind": "extension", "label": { "en": "South extension: Mercat Nou → Torrassa (Santa Eulàlia, Torrassa)" }, "notes": "[Opening-date chase 2026-06-13] Southern extension opened 23 Dec 1983, two days after the northern extension (21 Dec 1983).", "opened": "1983-12-23", "segment": { "fromStopIndex": 6, "toStopIndex": 8 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260312134041/https://en.wikipedia.org/wiki/Barcelona_Metro_line_1", "kind": "wikipedia", "quote": "1983 – Torras i Bages-Santa Coloma and Santa Eulàlia-Torrassa sections opened.", "tier": "tertiary", "title": "Barcelona Metro line 1 — Wikipedia (Santa Eulàlia, Torrassa Dec 1983)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_1" } ], "stationCount": 2 }, { "confidence": "low", "geometryRef": "barcelona-L1", "id": "barcelona-l1-1987", "kind": "extension", "label": { "en": "South extension: Torrassa → Florida (L'Hospitalet)" }, "opened": "1987-04-24", "segment": { "fromStopIndex": 2, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260312134041/https://en.wikipedia.org/wiki/Barcelona_Metro_line_1", "kind": "wikipedia", "quote": "1987 – Torrassa-Avinguda Carrilet section opened.", "tier": "tertiary", "title": "Barcelona Metro line 1 — Wikipedia (Avinguda Carrilet–Florida 24 Apr 1987)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_1" } ], "stationCount": 4 }, { "confidence": "low", "geometryRef": "barcelona-L1", "id": "barcelona-l1-1989", "kind": "extension", "label": { "en": "South extension: Florida → Hospital de Bellvitge" }, "opened": "1989-10-19", "segment": { "fromStopIndex": 0, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260312134041/https://en.wikipedia.org/wiki/Barcelona_Metro_line_1", "kind": "wikipedia", "quote": "1989 – Avinguda Carrilet-Feixa Llarga (now Hospital de Bellvitge) section opened.", "tier": "tertiary", "title": "Barcelona Metro line 1 — Wikipedia (Bellvitge, Hospital de Bellvitge 19 Oct 1989)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_1" } ], "stationCount": 2 }, { "confidence": "low", "geometryRef": "barcelona-L1", "id": "barcelona-l1-1992", "kind": "extension", "label": { "en": "North extension: Santa Coloma → Fondo" }, "opened": "1992-02-18", "segment": { "fromStopIndex": 28, "toStopIndex": 29 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260312134041/https://en.wikipedia.org/wiki/Barcelona_Metro_line_1", "kind": "wikipedia", "quote": "1992 – Santa Coloma-Fondo section opened.", "tier": "tertiary", "title": "Barcelona Metro line 1 — Wikipedia (Fondo 18 Feb 1992)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_1" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260312134041/https://en.wikipedia.org/wiki/Barcelona_Metro_line_1", "kind": "wikipedia", "tier": "tertiary", "title": "Barcelona Metro line 1 — Wikipedia", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_1" } ] }, { "cityId": "barcelona", "color": "#93328E", "displayNumber": "L2", "id": "barcelona-line-L2", "name": { "en": "L2 (Paral·lel ↔ Badalona Pompeu Fabra)", "nl": "Línia 2" }, "phases": [ { "confidence": "low", "constructionStart": "1991", "geometryRef": "barcelona-L2", "id": "barcelona-l2-1995", "kind": "initial", "label": { "en": "L2 opens (reusing Gran Metro tracks): Sant Antoni → Sagrada Família" }, "notes": "The modern L2 was created in 1995, partly reusing the 1920s–30s Gran Metro alignment (Sagrada Família etc.) abandoned by L4. Sant Antoni–Sagrada Família opened 25 Sep 1995. [Date chase 2026-06-12] Construction start for the modern L2 (reconstructing/remodeling the 1969-1973 Gran Metro tunnels) was 1991, the year the inter-administration funding/restart agreement was signed; per Catalan Wikipedia citing Revista de Obras Publicas (ROP-3363, 1997). The cited ROP primary PDFs (ropdigital.ciccp.es) are offline and the La Vanguardia 1993 confirmation is paywalled, so neither could be directly verified; the 1991 date rests on Wikipedia (English uncited + Catalan citing ROP). Construction-start corrected 1990→1991 [Date chase 2026-06-12 — panel-confirmed, corrected w/ sign-off]", "opened": "1995-09-25", "segment": { "fromStopIndex": 1, "toStopIndex": 5 }, "sources": [ { "accessedAt": "2026-06-06", "archivedUrl": "https://web.archive.org/web/20260201121919/https://en.wikipedia.org/wiki/Barcelona_metro_line_2", "kind": "wikipedia", "quote": "Sant Antoni-Sagrada Família section opens.", "tier": "secondary", "title": "Barcelona Metro line 2 - Wikipedia", "url": "https://en.wikipedia.org/wiki/Barcelona_metro_line_2" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260201121919/https://en.wikipedia.org/wiki/Barcelona_metro_line_2", "kind": "wikipedia", "title": "Barcelona Metro line 2 — Wikipedia (Sant Antoni–Sagrada Família 25 Sep 1995)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_2" } ], "stationCount": 4 }, { "confidence": "medium", "geometryRef": "barcelona-L2", "id": "barcelona-l2-1996", "kind": "extension", "label": { "en": "Extension: Sant Antoni → Paral·lel" }, "notes": "[Opening-date chase 2026-06-13] Day/month sourcing conflict for the Paral·lel extension: L2 article + UrbanRail give 6 Jan 1996, but the Paral·lel station article and es.Wikipedia place it in late December 1995. Curated 1996-01-06 retained on the strength of the line article and UrbanRail; the discrepancy is only days across year-end.", "opened": "1996-01-06", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-06", "archivedUrl": "https://web.archive.org/web/20260110063132/https://urbanrail.net/eu/es/bcn/line2.htm", "kind": "other", "quote": "06-01-1996: Opening of Paral.lel station", "tier": "tertiary", "title": "UrbanRail.Net > Barcelona Metro > L2 - Paral.lel - Pep Ventura", "url": "https://www.urbanrail.net/eu/es/bcn/line2.htm" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260201121919/https://en.wikipedia.org/wiki/Barcelona_metro_line_2", "kind": "wikipedia", "title": "Barcelona Metro line 2 — Wikipedia (Sant Antoni–Paral·lel 6 Jan 1996)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_2" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "barcelona-L2", "id": "barcelona-l2-1997", "kind": "extension", "label": { "en": "Extension: Sagrada Família → La Pau" }, "opened": "1997-09-20", "segment": { "fromStopIndex": 5, "toStopIndex": 10 }, "sources": [ { "accessedAt": "2026-06-06", "archivedUrl": "https://web.archive.org/web/20260201121919/https://en.wikipedia.org/wiki/Barcelona_metro_line_2", "kind": "wikipedia", "quote": "Sagrada Família-La Pau section opens.", "tier": "secondary", "title": "Barcelona Metro line 2 - Wikipedia", "url": "https://en.wikipedia.org/wiki/Barcelona_metro_line_2" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260201121919/https://en.wikipedia.org/wiki/Barcelona_metro_line_2", "kind": "wikipedia", "title": "Barcelona Metro line 2 — Wikipedia (Sagrada Família–La Pau 20 Sep 1997)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_2" } ], "stationCount": 5 }, { "confidence": "low", "geometryRef": "barcelona-L2", "id": "barcelona-l2-2002", "kind": "extension", "label": { "en": "L4 transfer: La Pau → Pep Ventura (Badalona)" }, "notes": "The La Pau–Pep Ventura section (Verneda, Artigues–Sant Adrià, Sant Roc, Gorg, Pep Ventura) was transferred from L4 to L2 in 2002. [Opening-date chase 2026-06-13] Curated date 2002-09-02 should be corrected to 2002-10-01: UrbanRail and es.Wikipedia (citing La Vanguardia, 1 Oct 2002) agree the L4→L2 transfer/reopening took effect 1 October 2002 after ~3 months of works that began in late June. The September date may reflect the closure start or a copy error. Year unchanged (2002), so flagged minor; recommend day/month correction to 2002-10-01.", "opened": "2002-09-02", "segment": { "fromStopIndex": 10, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-06", "archivedUrl": "https://web.archive.org/web/20260201121919/https://en.wikipedia.org/wiki/Barcelona_metro_line_2", "kind": "wikipedia", "quote": "La Pau-Pep Ventura section moved from L4 to L2.", "tier": "secondary", "title": "Barcelona Metro line 2 - Wikipedia", "url": "https://en.wikipedia.org/wiki/Barcelona_metro_line_2" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260201121919/https://en.wikipedia.org/wiki/Barcelona_metro_line_2", "kind": "wikipedia", "title": "Barcelona Metro line 2 — Wikipedia (La Pau–Pep Ventura transferred from L4, 2002)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_2" } ], "stationCount": 5 }, { "confidence": "low", "geometryRef": "barcelona-L2", "id": "barcelona-l2-2010", "kind": "extension", "label": { "en": "Extension: Pep Ventura → Badalona Pompeu Fabra" }, "opened": "2010-07-11", "segment": { "fromStopIndex": 15, "toStopIndex": 17 }, "sources": [ { "accessedAt": "2026-06-06", "archivedUrl": "https://web.archive.org/web/20260201121919/https://en.wikipedia.org/wiki/Barcelona_metro_line_2", "kind": "wikipedia", "quote": "Pep Ventura-Badalona Pompeu Fabra section opens.", "tier": "secondary", "title": "Barcelona Metro line 2 - Wikipedia", "url": "https://en.wikipedia.org/wiki/Barcelona_metro_line_2" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260201121919/https://en.wikipedia.org/wiki/Barcelona_metro_line_2", "kind": "wikipedia", "title": "Barcelona Metro line 2 — Wikipedia (Pep Ventura–Badalona Pompeu Fabra 11 Jul 2010)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_2" } ], "stationCount": 2 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260201121919/https://en.wikipedia.org/wiki/Barcelona_metro_line_2", "kind": "wikipedia", "tier": "tertiary", "title": "Barcelona Metro line 2 — Wikipedia", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_2" } ] }, { "cityId": "barcelona", "color": "#43B02A", "displayNumber": "L3", "id": "barcelona-line-L3", "name": { "en": "L3 (Zona Universitària ↔ Trinitat Nova)", "nl": "Línia 3" }, "phases": [ { "confidence": "medium", "constructionStart": "1921", "geometryRef": "barcelona-L3", "id": "barcelona-l3-1924", "kind": "initial", "label": { "en": "Gran Metro opens: Catalunya → Lesseps" }, "notes": "The Gran Metropolitano de Barcelona (today's L3 core) opened Catalunya–Lesseps on 30 Dec 1924 — the city's first underground line. No reliable peseta-era construction cost is available online (archival-only), so no cost figure is recorded — treat as UNKNOWN. [Date chase 2026-06-12] Construction-start corrected 1922->1921. Primary TMB chronology: works on the Lesseps-Liceu (later Catalunya) section began at the end of 1921; Catalan Wikipedia (per Salmeron 1992) dates it to July 1921. English Wikipedia carries no construction-start date for L3. Construction-start corrected 1922→1921 [Date chase 2026-06-12 — panel-confirmed, corrected w/ sign-off]", "opened": "1924-12-30", "segment": { "fromStopIndex": 11, "toStopIndex": 16 }, "sources": [ { "accessedAt": "2026-06-06", "archivedUrl": "https://web.archive.org/web/20250824110822/https://historia.tmb.cat/100-anys-metro/en/chronology/", "kind": "primary", "quote": "1924 - December 30: The Gran Metro opens the first four stations on the section between Lesseps and Catalunya. In addition to these, the Diagonal and Aragó stations (currently Passeig de Gràcia) open.", "tier": "primary", "title": "Chronology – TMB: Cent anys del Metro", "url": "https://historia.tmb.cat/100-anys-metro/en/chronology/" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260311093550/https://en.wikipedia.org/wiki/Barcelona_Metro_line_3", "kind": "wikipedia", "title": "Barcelona Metro line 3 — Wikipedia (opened 30 Dec 1924)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_3" } ], "stationCount": 6 }, { "confidence": "high", "geometryRef": "barcelona-L3", "id": "barcelona-l3-1924-70-core", "kind": "extension", "label": { "en": "Historic core completed: Catalunya → Drassanes → Paral·lel" }, "notes": "Bundles the slow 1925–1970 build of the southern core toward Paral·lel (Liceu 1925; Jaume I/Correos 1926–34; Fernando 1946; Drassanes 14 Dec 1968; Paral·lel 17 Jul 1970). Drawn here as a single segment for the historic core; the date used is the Paral·lel opening. [Opening-date chase 2026-06-13] Opening of the Paral·lel (Poble Sec) extension was 17 June 1970, not July; the earlier Drassanes station of this core had already opened 14 December 1968.", "opened": "1970-07-17", "segment": { "fromStopIndex": 16, "toStopIndex": 20 }, "sources": [ { "accessedAt": "2026-06-06", "archivedUrl": "https://web.archive.org/web/20250824110822/https://historia.tmb.cat/100-anys-metro/en/chronology/", "kind": "primary", "quote": "1970 - June 17: Line 3 extends to Poble Sec, overcoming the difficulties of the sandy terrain and water seepage due to the proximity to the sea.", "tier": "primary", "title": "Chronology – TMB: Cent anys del Metro", "url": "https://historia.tmb.cat/100-anys-metro/en/chronology/" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260311093550/https://en.wikipedia.org/wiki/Barcelona_Metro_line_3", "kind": "wikipedia", "title": "Barcelona Metro line 3 — Wikipedia (Drassanes 1968; Paral·lel 17 Jul 1970)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_3" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613160609/https://en.wikipedia.org/wiki/Paral%C2%B7lel_metro_station", "kind": "other", "publisher": "Wikipedia (EN)", "quote": "The station opened in 1970 with the extension of line L3 from Drassanes. The exact date provided is 17 June 1970.", "tier": "secondary", "title": "Paral·lel metro station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Paral%C2%B7lel_metro_station", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_3" } ], "stationCount": 4 }, { "confidence": "low", "geometryRef": "barcelona-L3", "id": "barcelona-l3-1975", "kind": "extension", "label": { "en": "L3B branch: Paral·lel → Zona Universitària" }, "notes": "Opened 1975 as the separate line 'L3B' (Paral·lel–Zona Universitària), merged into L3 in 1982 to form the current V-shape. [Opening-date chase 2026-06-13] Branch opened in two 1975 sub-phases: Zona Universitària–Tarragona on 20 January 1975, then Tarragona–Paral·lel on 15 July 1975 (the curated date), which connected the previously separated L3 sections.", "opened": "1975-07-15", "segment": { "fromStopIndex": 20, "toStopIndex": 25 }, "sources": [ { "accessedAt": "2026-06-06", "archivedUrl": "https://web.archive.org/web/20251123235559/https://es.wikipedia.org/wiki/L%C3%ADnea_3_(Metro_de_Barcelona)", "kind": "wikipedia", "quote": "En 20 de enero de 1975, dentro de los actos del cincuentenario del Metro de Barcelona se ... inaugura un nuevo tramo de 3600 metros de longitud de la línea III, llamada «Línea III-B» entre Zona Universitaria y Roma", "tier": "secondary", "title": "Línea 3 (Metro de Barcelona) – Wikipedia", "url": "https://es.wikipedia.org/wiki/L%C3%ADnea_3_(Metro_de_Barcelona)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260311093550/https://en.wikipedia.org/wiki/Barcelona_Metro_line_3", "kind": "wikipedia", "title": "Barcelona Metro line 3 — Wikipedia (L3B Paral·lel–Zona Universitària 1975)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_3" } ], "stationCount": 6 }, { "confidence": "medium", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "ESP", "isEstimate": false, "value": 3000000000, "year": 1985 }, "notes": "3,000 million pesetas for ~3,900 m of new line (Spanish Wikipedia). [Citation chase 2026-06-11] Corroborated by contemporary La Vanguardia coverage (6 Nov 1985, headline \"ha costado 3.000 millones\"); the 3,000M ESP covers only the ~3,900 m Lesseps–Montbau extension, excluding the Sant Genís depot (which brought the total to ~5,000M ESP).", "sources": [ { "accessedAt": "2026-06-06", "archivedUrl": "https://web.archive.org/web/20251114204124/https://ca.wikipedia.org/wiki/L%C3%ADnia_3_del_metro_de_Barcelona", "kind": "wikipedia", "tier": "tertiary", "title": "Línia 3 del metro de Barcelona — Viquipèdia", "url": "https://ca.wikipedia.org/wiki/L%C3%ADnia_3_del_metro_de_Barcelona" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20230423100455/https://hemeroteca.lavanguardia.com/preview/1985/11/05/pagina-21/32869515/pdf.html?search=%22Montbau%22", "kind": "news", "publisher": "La Vanguardia", "quote": "cas de la obra, que ha supuesto una inversión de 1000 millones de pesetas y debe ser completada con la construcción de las cocheras de Sant Genís... El montante total de la realización —prolongación de la línea y cocheras— ascenderá cuando concluyan todas las obras a casi 5.000 millones de pesetas.", "tier": "primary", "title": "Generalitat y Ayuntamiento desean mayor colaboración institucional", "url": "http://hemeroteca.lavanguardia.com/preview/1985/11/05/pagina-21/32869515/pdf.html?search=%22Montbau%22", "via": "https://ca.wikipedia.org/wiki/L%C3%ADnia_3_del_metro_de_Barcelona" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20241127171017/https://hemeroteca.lavanguardia.com/preview/1985/11/05/pagina-21/32868989/pdf.html?search=%22Montbau%22", "kind": "news", "publisher": "La Vanguardia", "tier": "primary", "title": "El nuevo tramo de metro de Lesseps a Montbau, de casi cuatro kilómetros, ha costado 3.000 millones", "url": "http://hemeroteca.lavanguardia.com/preview/1985/11/05/pagina-21/32868989/pdf.html?search=%22Montbau%22", "via": "https://ca.wikipedia.org/wiki/L%C3%ADnia_3_del_metro_de_Barcelona" } ] }, "geometryRef": "barcelona-L3", "id": "barcelona-l3-1985", "kind": "extension", "label": { "en": "North extension: Lesseps → Montbau" }, "opened": "1985-11-06", "segment": { "fromStopIndex": 7, "toStopIndex": 11 }, "sources": [ { "accessedAt": "2026-06-06", "archivedUrl": "https://web.archive.org/web/20250824110822/https://historia.tmb.cat/100-anys-metro/en/chronology/", "kind": "primary", "quote": "1985 - November 6: Line 3 ... advancing four stations from Lesseps: Vallcarca, Penitents, Vall d'Hebron and Montbau.", "tier": "primary", "title": "Chronology – TMB: Cent anys del Metro", "url": "https://historia.tmb.cat/100-anys-metro/en/chronology/" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260311093550/https://en.wikipedia.org/wiki/Barcelona_Metro_line_3", "kind": "wikipedia", "title": "Barcelona Metro line 3 — Wikipedia (Lesseps–Montbau 6 Nov 1985)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_3" } ], "stationCount": 4 }, { "confidence": "medium", "cost": { "basis": "budget", "confidence": "medium", "nominal": { "currency": "ESP", "isEstimate": false, "value": 14000000000, "year": 2001 }, "notes": "12,144 million pesetas per Spanish Wikipedia; low confidence (single tertiary source, figure not cross-checked). [Citation chase 2026-06-11] Primary source (La Vanguardia, 15 Sept 2001) reports a budget of 14,000 million pesetas contributed by the Generalitat de Catalunya — contradicting the 12,144 million figure (unsourced on Spanish Wikipedia). Figure appears to be an authorized budget, not an audited final cost; the contemporary newspaper value of ~14,000 million ESP (2001, nominal) is likely more reliable. Note: the attached source URL points to Catalan Wikipedia, which contains no cost figure. [Corrected 2026-06-12 after citation chase] Previously 12,144M ESP per an unsourced Spanish Wikipedia sentence; the contemporary La Vanguardia article Wikipedia itself cites (15 Sep 2001) states a budget of 14,000M ESP contributed by the Generalitat for the 3-station Montbau→Canyelles extension. Adversarial panel confirmed the old value wrong.", "sources": [ { "accessedAt": "2026-06-06", "archivedUrl": "https://web.archive.org/web/20251123235559/https://es.wikipedia.org/wiki/L%C3%ADnea_3_(Metro_de_Barcelona)", "kind": "wikipedia", "tier": "tertiary", "title": "Línea 3 (Metro de Barcelona) — Wikipedia (es)", "url": "https://es.wikipedia.org/wiki/L%C3%ADnea_3_(Metro_de_Barcelona)" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20230423071115/https://hemeroteca.lavanguardia.com/preview/2001/09/15/pagina-6/34174546/pdf.html?search=%22Canyelles%22", "kind": "news", "publisher": "La Vanguardia", "quote": "Tras tres años de obras y un presupuesto de 14.000 millones de pesetas aportado por la Generalitat, la línea verde del metro incorpora así las estaciones de Mundet, Valldaura y Canyelles, que suman casi dos kilómetros y medio de recorrido.", "tier": "primary", "title": "La línea 3 del metro se prolonga hasta Canyelles a partir del día 21", "url": "http://hemeroteca.lavanguardia.com/preview/2001/09/15/pagina-6/34174546/pdf.html?search=%22Canyelles%22", "via": "https://es.wikipedia.org/wiki/L%C3%ADnea_3_(Metro_de_Barcelona)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20230423071115/https://hemeroteca.lavanguardia.com/preview/2001/09/15/pagina-6/34174546/pdf.html?search=%22Canyelles%22", "kind": "news", "publisher": "La Vanguardia", "quote": "Tras tres años de obras y un presupuesto de 14.000 millones de pesetas aportado por la Generalitat, la línea verde del metro incorpora así las estaciones de Mundet, Valldaura y Canyelles, que suman casi dos kilómetros y medio de recorrido.", "tier": "primary", "title": "La línea 3 del metro se prolonga hasta Canyelles a partir del día 21", "url": "http://hemeroteca.lavanguardia.com/preview/2001/09/15/pagina-6/34174546/pdf.html?search=%22Canyelles%22", "via": "https://es.wikipedia.org/wiki/L%C3%ADnea_3_(Metro_de_Barcelona)" } ] }, "geometryRef": "barcelona-L3", "id": "barcelona-l3-2001", "kind": "extension", "label": { "en": "North extension: Montbau → Canyelles" }, "opened": "2001-09-21", "segment": { "fromStopIndex": 4, "toStopIndex": 7 }, "sources": [ { "accessedAt": "2026-06-06", "archivedUrl": "https://web.archive.org/web/20250824110822/https://historia.tmb.cat/100-anys-metro/en/chronology/", "kind": "primary", "quote": "2001 - September 21: Line 3 advances and opens three new stations, each with a unique design ... Mundet ... Valldaura ... and Canyelles.", "tier": "primary", "title": "Chronology – TMB: Cent anys del Metro", "url": "https://historia.tmb.cat/100-anys-metro/en/chronology/" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260311093550/https://en.wikipedia.org/wiki/Barcelona_Metro_line_3", "kind": "wikipedia", "title": "Barcelona Metro line 3 — Wikipedia (Montbau–Canyelles 21 Sep 2001)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_3" } ], "stationCount": 3 }, { "confidence": "medium", "geometryRef": "barcelona-L3", "id": "barcelona-l3-2008", "kind": "extension", "label": { "en": "North extension: Canyelles → Trinitat Nova" }, "notes": "[Opening-date chase 2026-06-13] Canyelles–Trinitat Nova section (Roquetes, Trinitat Nova) opened 4 October 2008, not July; curated month appears to be a data-entry transposition error.", "opened": "2008-07-04", "segment": { "fromStopIndex": 0, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-06-06", "archivedUrl": "https://web.archive.org/web/20250824110822/https://historia.tmb.cat/100-anys-metro/en/chronology/", "kind": "primary", "quote": "2008 - October 4: The new Roquetes and Trinitat Nova stations on line 3 are inaugurated ... a station that becomes the first interchange where three metro lines converge: 3, 4 and 11.", "tier": "primary", "title": "Chronology – TMB: Cent anys del Metro", "url": "https://historia.tmb.cat/100-anys-metro/en/chronology/" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260311093550/https://en.wikipedia.org/wiki/Barcelona_Metro_line_3", "kind": "wikipedia", "title": "Barcelona Metro line 3 — Wikipedia (Canyelles–Trinitat Nova 4 Jul 2008)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_3" } ], "stationCount": 4 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260311093550/https://en.wikipedia.org/wiki/Barcelona_Metro_line_3", "kind": "wikipedia", "tier": "tertiary", "title": "Barcelona Metro line 3 — Wikipedia", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_3" } ] }, { "cityId": "barcelona", "color": "#F2A900", "displayNumber": "L4", "id": "barcelona-line-L4", "name": { "en": "L4 (La Pau ↔ Trinitat Nova)", "nl": "Línia 4" }, "phases": [ { "confidence": "medium", "geometryRef": "barcelona-L4", "id": "barcelona-l4-1973", "kind": "initial", "label": { "en": "L4 opens (Gran Metro stations reopened): Joanic → Jaume I" }, "notes": "L4 was created on 5 Feb 1973, reopening a stretch of the old Gran Metro alignment (Joanic–Jaume I). The drawn segment also covers the Girona/Verdaguer central stations on the modern L4 spine. [Opening-date chase 2026-06-13] TMB operator article confirms 5 Feb 1973 was the official inauguration (public revenue service), not a ceremonial-only event.", "opened": "1973-02-05", "segment": { "fromStopIndex": 7, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251221203139/https://en.wikipedia.org/wiki/Barcelona_metro_line_4", "kind": "wikipedia", "quote": "5 February 1973 – Joanic-Jaume I section opened", "tier": "secondary", "title": "Barcelona Metro line 4 — Wikipedia (Joanic–Jaume I 5 Feb 1973)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_4" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260604115430/https://noticies.tmb.cat/historia/50-anys-de-creacio-de-linia-4-de-metro-de-barcelona", "kind": "primary", "publisher": "Transports Metropolitans de Barcelona (TMB)", "quote": "El 5 de febrer de 1973 s'inaugurava oficialment una nova línia de metro, la línia 4", "tier": "primary", "title": "50 anys de la creació de la línia 4 de metro de Barcelona — TMB Notícies", "url": "https://noticies.tmb.cat/historia/50-anys-de-creacio-de-linia-4-de-metro-de-barcelona", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_4" } ], "stationCount": 6 }, { "confidence": "medium", "geometryRef": "barcelona-L4", "id": "barcelona-l4-1974", "kind": "extension", "label": { "en": "North extension: Joanic → Guinardó" }, "notes": "[Opening-date chase 2026-06-13] TMB references the 1974 Guinardo extension without a precise date; the 16 May 1974 day comes only from Wikipedia.", "opened": "1974-05-16", "segment": { "fromStopIndex": 5, "toStopIndex": 7 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251221203139/https://en.wikipedia.org/wiki/Barcelona_metro_line_4", "kind": "wikipedia", "quote": "16 May 1974 – Joanic-Guinardó section opened", "tier": "secondary", "title": "Barcelona Metro line 4 — Wikipedia (Joanic–Guinardó 16 May 1974)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_4" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250905080544/https://noticies.tmb.cat/historia/barceloneta-celebra-40-anys-millorant-seva-accessibilitat", "kind": "primary", "publisher": "Transports Metropolitans de Barcelona (TMB)", "quote": "El 15 de març de 1976, ara fa 40 anys, s'obria al públic l'estació de Barceloneta [references earlier 1974 extension to Guinardó without giving an exact date]", "tier": "primary", "title": "Barceloneta celebra els 40 anys millorant la seva accessibilitat — TMB Notícies", "url": "https://noticies.tmb.cat/historia/barceloneta-celebra-40-anys-millorant-seva-accessibilitat", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_4" } ], "stationCount": 2 }, { "confidence": "medium", "geometryRef": "barcelona-L4", "id": "barcelona-l4-1976", "kind": "extension", "label": { "en": "South extension: Jaume I → Barceloneta" }, "notes": "[Opening-date chase 2026-06-13] TMB article explicitly describes the public opening of Barceloneta on 15 Mar 1976.", "opened": "1976-03-15", "segment": { "fromStopIndex": 13, "toStopIndex": 14 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251221203139/https://en.wikipedia.org/wiki/Barcelona_metro_line_4", "kind": "wikipedia", "quote": "15 March 1976 – Jaume I-Barceloneta section opened", "tier": "secondary", "title": "Barcelona Metro line 4 — Wikipedia (Jaume I–Barceloneta 15 Mar 1976)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_4" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250905080544/https://noticies.tmb.cat/historia/barceloneta-celebra-40-anys-millorant-seva-accessibilitat", "kind": "primary", "publisher": "Transports Metropolitans de Barcelona (TMB)", "quote": "El 15 de març de 1976, ara fa 40 anys, s'obria al públic l'estació de Barceloneta", "tier": "primary", "title": "Barceloneta celebra els 40 anys millorant la seva accessibilitat — TMB Notícies", "url": "https://noticies.tmb.cat/historia/barceloneta-celebra-40-anys-millorant-seva-accessibilitat", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_4" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "barcelona-L4", "id": "barcelona-l4-1977", "kind": "extension", "label": { "en": "South-east extension: Barceloneta → Selva de Mar" }, "notes": "[Opening-date chase 2026-06-13] TMB confirms the five-station Selva de Mar extension opened 7 Oct 1977.", "opened": "1977-10-07", "segment": { "fromStopIndex": 14, "toStopIndex": 18 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251221203139/https://en.wikipedia.org/wiki/Barcelona_metro_line_4", "kind": "wikipedia", "quote": "7 October 1977 – Barceloneta-Selva de Mar section opened", "tier": "secondary", "title": "Barcelona Metro line 4 — Wikipedia (Barceloneta–Selva de Mar 7 Oct 1977)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_4" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250905080544/https://noticies.tmb.cat/historia/barceloneta-celebra-40-anys-millorant-seva-accessibilitat", "kind": "primary", "publisher": "Transports Metropolitans de Barcelona (TMB)", "quote": "el 7 d'octubre de 1977, es va inaugurar la prolongació fins a Selva de Mar, que incloïa cinc noves estacions", "tier": "primary", "title": "Barceloneta celebra els 40 anys millorant la seva accessibilitat — TMB Notícies", "url": "https://noticies.tmb.cat/historia/barceloneta-celebra-40-anys-millorant-seva-accessibilitat", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_4" } ], "stationCount": 4 }, { "confidence": "medium", "geometryRef": "barcelona-L4", "id": "barcelona-l4-1982-south", "kind": "extension", "label": { "en": "South extension: Selva de Mar → La Pau" }, "notes": "La Pau reached 1982; the El Maresme-Fòrum infill on this stretch opened 4 Aug 2003. Selva de Mar–La Pau is drawn together with that infill as one segment. [Opening-date chase 2026-06-13] GenTMB confirms the Selva de Mar - La Pau south extension opened 15 Oct 1982. Curated source quote field mistakenly contains the northern Via Julia text.", "opened": "1982-10-15", "segment": { "fromStopIndex": 18, "toStopIndex": 20 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251221203139/https://en.wikipedia.org/wiki/Barcelona_metro_line_4", "kind": "wikipedia", "quote": "19 April 1982 – Guinardó-Via Júlia section ... in the context of a general reorganization of the Barcelona Metro, several stations changed names and Line IV became Line 4", "tier": "secondary", "title": "Barcelona Metro line 4 — Wikipedia (La Pau 1982; El Maresme-Fòrum 4 Aug 2003)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_4" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613160701/https://gentmb.tmb.cat/seccio/historia/linia-4-metro-sestenia-pels-extrems-fa-30-anys", "kind": "primary", "publisher": "Transports Metropolitans de Barcelona (TMB)", "quote": "El 15 d'octubre del 1982, ara fa 30 anys, s'inaugurava la prolongació Selva de Mar - La Pau", "tier": "primary", "title": "La línia 4 de metro s'estenia pels extrems fa 30 anys — GenTMB", "url": "https://gentmb.tmb.cat/seccio/historia/linia-4-metro-sestenia-pels-extrems-fa-30-anys", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_4" } ], "stationCount": 2 }, { "confidence": "medium", "geometryRef": "barcelona-L4", "id": "barcelona-l4-1982-north", "kind": "extension", "label": { "en": "North extension: Guinardó → Via Júlia" }, "notes": "[Opening-date chase 2026-06-13] GenTMB confirms the Via Julia extension opened in 1982 a few months before La Pau; the 19 Apr 1982 day comes only from Wikipedia.", "opened": "1982-04-19", "segment": { "fromStopIndex": 1, "toStopIndex": 5 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251221203139/https://en.wikipedia.org/wiki/Barcelona_metro_line_4", "kind": "wikipedia", "quote": "19 April 1982 – Guinardó-Via Júlia section ... in the context of a general reorganization of the Barcelona Metro, several stations changed names and Line IV became Line 4", "tier": "secondary", "title": "Barcelona Metro line 4 — Wikipedia (Guinardó–Via Júlia 19 Apr 1982)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_4" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613160701/https://gentmb.tmb.cat/seccio/historia/linia-4-metro-sestenia-pels-extrems-fa-30-anys", "kind": "primary", "publisher": "Transports Metropolitans de Barcelona (TMB)", "quote": "El 15 d'octubre del 1982, ara fa 30 anys, s'inaugurava la prolongació Selva de Mar - La Pau [northern Via Júlia extension mentioned only as opening 'uns mesos' (a few months) earlier in 1982, no exact date given]", "tier": "primary", "title": "La línia 4 de metro s'estenia pels extrems fa 30 anys — GenTMB", "url": "https://gentmb.tmb.cat/seccio/historia/linia-4-metro-sestenia-pels-extrems-fa-30-anys", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_4" } ], "stationCount": 4 }, { "confidence": "high", "geometryRef": "barcelona-L4", "id": "barcelona-l4-1999", "kind": "extension", "label": { "en": "North extension: Via Júlia → Trinitat Nova" }, "notes": "[Opening-date chase 2026-06-13] Roquetes-Trinitat Nova entered service 27 Oct 1999; the '28 d'octubre' seen elsewhere is the La Vanguardia day-after coverage date, not the opening date.", "opened": "1999-10-27", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251221203139/https://en.wikipedia.org/wiki/Barcelona_metro_line_4", "kind": "wikipedia", "quote": "27 October 1999 – Via Júlia-Trinitat Nova section opened", "tier": "secondary", "title": "Barcelona Metro line 4 — Wikipedia (Via Júlia–Trinitat Nova 27 Oct 1999)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_4" }, { "accessedAt": "2026-06-13", "kind": "other", "publisher": "Arxiu Històric de Roquetes-Nou Barris", "quote": "El 27 d'octubre de 1999, va entrar en servei el nou tram 'Roquetes-Trinitat Nova' de la L4 de metro", "tier": "tertiary", "title": "Història del metro a Nou Barris (V): anys d'expansió i d'inauguracions — Arxiu Històric de Roquetes-Nou Barris", "url": "http://arxiuhistoric.blogspot.com/2014/07/historia-del-metro-nou-barris-v-anys.html", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_4" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250528164244/https://hemeroteca-paginas.lavanguardia.com/LVE01/PUB/1999/10/28/BAR19991028-005.pdf", "kind": "news", "publisher": "La Vanguardia", "quote": "[Newspaper dated 28 October 1999 — day-after coverage; title confirms station entered service but date of article is day after opening]", "tier": "secondary", "title": "La polémica estación de Trinitat Nova de la L4 entra en servicio — La Vanguardia", "url": "https://hemeroteca-paginas.lavanguardia.com/LVE01/PUB/1999/10/28/BAR19991028-005.pdf", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_4" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251221203139/https://en.wikipedia.org/wiki/Barcelona_metro_line_4", "kind": "wikipedia", "tier": "tertiary", "title": "Barcelona Metro line 4 — Wikipedia", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_4" } ] }, { "cityId": "barcelona", "color": "#0072CE", "displayNumber": "L5", "id": "barcelona-line-L5", "name": { "en": "L5 (Cornellà Centre ↔ Vall d'Hebron)", "nl": "Línia 5" }, "phases": [ { "confidence": "medium", "geometryRef": "barcelona-L5", "id": "barcelona-l5-1959", "kind": "initial", "label": { "en": "Line II opens: La Sagrera → Vilapicina" }, "notes": "L5 originated as 'Línia II', opening La Sagrera–Vilapicina on 21 Jul 1959; numbering and through-routing were rationalised when the central Collblanc–Diagonal section opened in 1969–70. [Opening-date chase 2026-06-13] TMB Notícies (primary) confirms the La Sagrera–Vilapicina opening as 21 July 1959 under the name Línia II, origin of the current Line 5.", "opened": "1959-07-21", "segment": { "fromStopIndex": 14, "toStopIndex": 19 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260128113638/https://en.wikipedia.org/wiki/Barcelona_metro_line_5", "kind": "wikipedia", "quote": "Line 5's initial section was opened on July 21, 1959. The route connected Vilapicina to La Sagrera across 2.3 km with 5 stations.", "tier": "secondary", "title": "Barcelona Metro line 5 — Wikipedia (La Sagrera–Vilapicina 21 Jul 1959)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_5" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260311111120/https://noticies.tmb.cat/historia/linia-ii-sagrera-vilapicina-precursora-de-lautomatitzacio", "kind": "primary", "publisher": "TMB Notícies", "quote": "El ramal del Metro Transversal entre la Sagrera i Vilapicina, denominat línia II (origen de l'actual línia 5), es va inaugurar el 21 de juliol de 1959.", "tier": "primary", "title": "Línia II (Sagrera-Vilapicina): precursora de l'automatització", "url": "https://noticies.tmb.cat/historia/linia-ii-sagrera-vilapicina-precursora-de-lautomatitzacio", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_5" } ], "stationCount": 5 }, { "confidence": "medium", "geometryRef": "barcelona-L5", "id": "barcelona-l5-1967", "kind": "extension", "label": { "en": "North extension: Vilapicina → Horta" }, "notes": "[Opening-date chase 2026-06-13] Day/month correction: the Vilapicina–Horta extension opened 5 October 1967 (curated month '11' is a transposition of '10'); same year. Confirmed via Spanish Wikipedia Horta station article citing La Vanguardia of 6 Oct 1967.", "opened": "1967-11-05", "segment": { "fromStopIndex": 19, "toStopIndex": 21 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260128113638/https://en.wikipedia.org/wiki/Barcelona_metro_line_5", "kind": "wikipedia", "quote": "In 1967, it would be extended from Vilapicina to Horta.", "tier": "secondary", "title": "Barcelona Metro line 5 — Wikipedia (Vilapicina–Horta 1967)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_5" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251112115404/https://es.wikipedia.org/wiki/Estaci%C3%B3n_de_Horta", "kind": "other", "publisher": "Wikipedia (ES)", "quote": "Finalmente, el 5 de octubre de 1967, entró en servicio esta prolongación. A la inauguración asistieron funcionarios de la V Jefatura Regional de la Dirección General de Transportes Terrestres del Ministerio de Obras Públicas y miembros del Ayuntamiento de Barcelona.", "tier": "secondary", "title": "Estación de Horta — Wikipedia (ES)", "url": "https://es.wikipedia.org/wiki/Estaci%C3%B3n_de_Horta", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_5" } ], "stationCount": 2 }, { "confidence": "medium", "geometryRef": "barcelona-L5", "id": "barcelona-l5-1969-70", "kind": "extension", "label": { "en": "Central section: Collblanc → Diagonal → Vilapicina (lines joined)" }, "notes": "Collblanc–Diagonal opened 3 Nov 1969 and was joined through Diagonal to Vilapicina on 26 Jun 1970, when Línia II merged into Línia V (L5). Drawn as one central segment; date is the 1970 join. [Opening-date chase 2026-06-13] Phase opened in two sub-segments: the first sub-segment (Collblanc to Diagonal) opened 3 November 1969, and the full junction (Diagonal–La Sagrera, merging Line II into Line V) opened 26 June 1970 — the curated date for the 'lines joined' phase.", "opened": "1970-06-26", "segment": { "fromStopIndex": 5, "toStopIndex": 14 }, "sources": [ { "accessedAt": "2026-06-06", "archivedUrl": "https://web.archive.org/web/20251113203920/https://es.wikipedia.org/wiki/L%C3%ADnea_5_(Metro_de_Barcelona)", "kind": "wikipedia", "quote": "El 26 de junio de 1970 se inauguraron el resto de estaciones del proyecto inicial entre Verdaguer (entonces General Mola) y Camp de l'Arpa, llegando hasta la Sagrera", "tier": "secondary", "title": "Línea 5 (Metro de Barcelona) - Wikipedia", "url": "https://es.wikipedia.org/wiki/L%C3%ADnea_5_(Metro_de_Barcelona)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260128113638/https://en.wikipedia.org/wiki/Barcelona_metro_line_5", "kind": "wikipedia", "title": "Barcelona Metro line 5 — Wikipedia (Collblanc–Diagonal 3 Nov 1969; join 26 Jun 1970)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_5" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260604120908/https://noticies.tmb.cat/historia/linia-5-de-metro-sestenia-de-diagonal-sagrera-fa-50-anys", "kind": "primary", "publisher": "TMB Notícies", "quote": "El 26 de juny del 1970 s'inaugurava oficialment la prolongació Diagonal - La Sagrera", "tier": "primary", "title": "La línia 5 de metro s'estenia de Diagonal a La Sagrera fa 50 anys", "url": "https://noticies.tmb.cat/historia/linia-5-de-metro-sestenia-de-diagonal-sagrera-fa-50-anys", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_5" } ], "stationCount": 9 }, { "confidence": "high", "geometryRef": "barcelona-L5", "id": "barcelona-l5-1973", "kind": "extension", "label": { "en": "West extension: Collblanc → Pubilla Cases" }, "notes": "[Opening-date chase 2026-06-13] Collblanc–Pubilla Cases opened 5 February 1973, the same day as the new Line IV.", "opened": "1973-02-05", "segment": { "fromStopIndex": 3, "toStopIndex": 5 }, "sources": [ { "accessedAt": "2026-06-06", "archivedUrl": "https://web.archive.org/web/20251114021231/https://en.wikipedia.org/wiki/Pubilla_Cases_(Barcelona_Metro)", "kind": "wikipedia", "quote": "Pubilla Cases entered into service on February 5, 1973, the same day as the new Line IV. ... In 1982, the station Catalanized its name from Pubilla Casas to Pubilla Cases, at the same time that Line V adopted Arabic numerals and became Line 5.", "tier": "secondary", "title": "Pubilla Cases (Barcelona Metro) - Wikipedia", "url": "https://en.wikipedia.org/wiki/Pubilla_Cases_(Barcelona_Metro)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260128113638/https://en.wikipedia.org/wiki/Barcelona_metro_line_5", "kind": "wikipedia", "title": "Barcelona Metro line 5 — Wikipedia (Collblanc–Pubilla Cases 5 Feb 1973)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_5" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613160741/https://es.wikipedia.org/wiki/Estaci%C3%B3n_de_Pubilla_Cases", "kind": "other", "publisher": "Wikipedia (ES)", "quote": "El tramo entró en servicio el 5 de febrero de 1973, el mismo día que la nueva línea IV. La inauguración estuvo presidida por el ministro de Obras Públicas, Gonzalo Fernández de la Mora, acompañado de los alcaldes de Barcelona y Hospitalet de Llobregat.", "tier": "secondary", "title": "Estación de Pubilla Cases — Wikipedia (ES)", "url": "https://es.wikipedia.org/wiki/Estaci%C3%B3n_de_Pubilla_Cases", "via": "https://en.wikipedia.org/wiki/Pubilla_Cases_(Barcelona_Metro)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260604115428/https://noticies.tmb.cat/historia/estacions-de-xarxa-de-metro-que-han-canviat-de-nom-linia-blava-l5", "kind": "primary", "publisher": "TMB Notícies", "quote": "el 5 de febrer de 1973, com a part de la prolongació de l'L5", "tier": "primary", "title": "Les estacions de la xarxa de metro que han canviat de nom: la línia blava (L5)", "url": "https://noticies.tmb.cat/historia/estacions-de-xarxa-de-metro-que-han-canviat-de-nom-linia-blava-l5", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_5" } ], "stationCount": 2 }, { "confidence": "low", "geometryRef": "barcelona-L5", "id": "barcelona-l5-1976", "kind": "extension", "label": { "en": "West extension: Pubilla Cases → Sant Ildefons" }, "notes": "[Opening-date chase 2026-06-13] Sant Ildefons opened 23 November 1976 as terminal of the Line V extension from Pubilla Cases — the first metro station in Cornellà de Llobregat.", "opened": "1976-11-23", "segment": { "fromStopIndex": 2, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-06-06", "archivedUrl": "https://web.archive.org/web/20260111210910/https://es.wikipedia.org/wiki/Estaci%C3%B3n_de_Sant_Ildefons", "kind": "wikipedia", "quote": "Sant Ildefons station entered into service on November 23, 1976, as the terminal of the extension of the then Line V from Pubilla Casas (current Pubilla Cases).", "tier": "secondary", "title": "Estación de Sant Ildefons - Wikipedia", "url": "https://es.wikipedia.org/wiki/Estaci%C3%B3n_de_Sant_Ildefons" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260128113638/https://en.wikipedia.org/wiki/Barcelona_metro_line_5", "kind": "wikipedia", "title": "Barcelona Metro line 5 — Wikipedia (Sant Ildefons 23 Nov 1976)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_5" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "barcelona-L5", "id": "barcelona-l5-1983", "kind": "extension", "label": { "en": "West extension: Sant Ildefons → Cornellà Centre" }, "opened": "1983-12-23", "segment": { "fromStopIndex": 0, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260128113638/https://en.wikipedia.org/wiki/Barcelona_metro_line_5", "kind": "wikipedia", "quote": "Sant Ildefons to Cornellà Centre (current western terminus) ... December 23, 1983", "tier": "secondary", "title": "Barcelona Metro line 5 — Wikipedia (Cornellà Centre 23 Dec 1983)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_5" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260111210910/https://es.wikipedia.org/wiki/Estaci%C3%B3n_de_Sant_Ildefons", "kind": "other", "publisher": "Wikipedia (ES)", "quote": "Dejó de ser terminal el 23 de diciembre de 1983, cuando se abrió la prolongación de la línea 5 hasta Cornellà (actual Cornellà Centre). La inauguración estuvo presidida por los alcaldes de Barcelona y Cornellá de Llobregat, Pasqual Maragall y Frederic Prieto, así como el en ese momento presidente de la Generalidad de Cataluña, Jordi Pujol.", "tier": "secondary", "title": "Estación de Sant Ildefons — Wikipedia (ES)", "url": "https://es.wikipedia.org/wiki/Estaci%C3%B3n_de_Sant_Ildefons", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_5" } ], "stationCount": 2 }, { "confidence": "high", "constructionStart": "2002", "geometryRef": "barcelona-L5", "id": "barcelona-l5-2010", "kind": "extension", "label": { "en": "North-east extension: Horta → Vall d'Hebron" }, "notes": "The Horta–Vall d'Hebron extension (opened 30 Jul 2010) is infamous for the 2005 El Carmel tunnel collapse during construction, which forced costly remediation and rehousing. No clean isolated construction cost for the extension is published online, so no cost figure is recorded — treat as UNKNOWN. [Date chase 2026-06-12] Construction-start year 2002 confirmed at year granularity by en/ca/es Wikipedia; ca and es editions trace it to the Anuari Territorial de Catalunya 2003 (Institut d'Estudis Catalans, Oct 2004, p. 223), an offline primary source. The 2005 El Carmel tunnel collapse delayed the opening to 2010. [Opening-date chase 2026-06-13] Horta–Vall d'Hebron opened 30 July 2010, five years after the 2005 El Carmel tunnel collapse; construction had begun 10 November 2002 (supports curated constructionStart '2002').", "opened": "2010-07-30", "segment": { "fromStopIndex": 21, "toStopIndex": 26 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260128113638/https://en.wikipedia.org/wiki/Barcelona_metro_line_5", "kind": "wikipedia", "quote": "Horta to Vall d'Hebron ... New Stations: 2 (El Carmel, El Coll - La Teixonera) ... A major tunnel collapse occurred in El Carmel neighborhood in 2005 ... The extension to the line's current terminus at Vall d'Hebron would finally open in 2010.", "tier": "secondary", "title": "Barcelona Metro line 5 — Wikipedia (Vall d'Hebron 30 Jul 2010)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_5" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251112115404/https://es.wikipedia.org/wiki/Estaci%C3%B3n_de_Horta", "kind": "other", "publisher": "Wikipedia (ES)", "quote": "El 30 de julio de 2010 se inauguró el tramo Horta-Vall d'Hebron. El acto estuvo presidido por el alcalde de Barcelona, Jordi Hereu, el consejero de Política Territorial y Obras Públicas, Joaquim Nadal y el presidente de la Generalidad, José Montilla.", "tier": "secondary", "title": "Estación de Horta — Wikipedia (ES)", "url": "https://es.wikipedia.org/wiki/Estaci%C3%B3n_de_Horta", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_5" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613160745/https://www.lavanguardia.com/vida/20100730/53974110567/el-nuevo-tramo-de-la-l5-entra-en-funcionamiento-cinco-anos-despues-del-derrumbe-del-carmel.html", "kind": "news", "publisher": "La Vanguardia", "quote": "[Article URL contains date 20100730; cited in English Wikipedia as dated '30 July 2010'; La Vanguardia blocked for direct fetch]", "tier": "primary", "title": "El nuevo tramo de la L5 entra en funcionamiento cinco años después del derrumbe del Carmel", "url": "https://www.lavanguardia.com/vida/20100730/53974110567/el-nuevo-tramo-de-la-l5-entra-en-funcionamiento-cinco-anos-despues-del-derrumbe-del-carmel.html", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_5" } ], "stationCount": 5 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260128113638/https://en.wikipedia.org/wiki/Barcelona_metro_line_5", "kind": "wikipedia", "tier": "tertiary", "title": "Barcelona Metro line 5 — Wikipedia", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_5" } ] }, { "cityId": "barcelona", "color": "#FE5000", "displayNumber": "L9N", "id": "barcelona-line-L9N", "name": { "en": "L9 Nord (La Sagrera ↔ Can Zam)", "nl": "Línia 9 Nord" }, "phases": [ { "confidence": "high", "constructionStart": "2003", "geometryRef": "barcelona-L9N", "id": "barcelona-l9n-2009", "kind": "initial", "label": { "en": "L9 Nord opens (automated): La Sagrera → Can Zam" }, "notes": "First operational section of the driverless L9/L10 program, opened 13 Dec 2009 (La Sagrera–Can Zam, into Santa Coloma de Gramenet), with the interior Santa Rosa station added later as an infill. Whole spine drawn here; cost for the entire L9/L10 program is carried once on L9 Sud to avoid double-counting. [Date chase 2026-06-12] Construction began September 2003 in Badalona (per ES/CA Wikipedia, citing Anuari territorial de Catalunya 2003 p. 220). The '2002' seen in English-language sources refers to PDI plan approval (25 Apr 2002), not physical works start.", "opened": "2009-12-13", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251128232910/https://en.wikipedia.org/wiki/Barcelona_Metro_line_9", "kind": "wikipedia", "quote": "the section between Can Peixauet and Can Zam, excluding Santa Rosa station, opened to the public", "tier": "tertiary", "title": "Barcelona Metro line 9 — Wikipedia (La Sagrera–Can Zam 13 Dec 2009)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_9" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613160702/https://www.elperiodico.cat/ca/barcelona/20091205/la-l-9-arribara-el-13-88696", "kind": "news", "publisher": "El Periódico de Catalunya", "quote": "La L-9 arribarà el 13 de desembre a cinc estacions de Santa Coloma", "tier": "secondary", "title": "La L-9 arribarà el 13 de desembre a cinc estacions de Santa Coloma", "url": "https://www.elperiodico.cat/ca/barcelona/20091205/la-l-9-arribara-el-13-de-desembre-a-cinc-estacions-de-santa-coloma-88696", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_9" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260611112235/https://www.railway-technology.com/projects/barcelona-metro-line-9/", "kind": "other", "publisher": "Railway Technology", "quote": "the first three sections of the line commissioned in December 2009, April 2010 and June 2010 respectively", "tier": "secondary", "title": "Barcelona Metro Line 9 — Railway Technology", "url": "https://www.railway-technology.com/projects/barcelona-metro-line-9/", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_9" } ], "stationCount": 8 }, { "confidence": "medium", "geometryRef": null, "id": "barcelona-l9n-2011-santarosa", "kind": "extension", "label": { "en": "Infill station opens: Santa Rosa" }, "notes": "Santa Rosa is an interior infill station on the existing 2009 L9 Nord alignment; it opened 19 Sep 2011. Carries no geometry (the spine is already drawn by the 2009 phase) and no separate cost. [Opening-date chase 2026-06-13] Santa Rosa is an infill station fitted into the already-built Fondo-Can Peixauet section that opened in revenue service on 13 Dec 2009; it was deliberately excluded from the 2009 opening and added on 19 Sep 2011.", "opened": "2011-09-19", "sources": [ { "accessedAt": "2026-06-06", "archivedUrl": "https://web.archive.org/web/20260316222127/https://en.wikipedia.org/wiki/Santa_Rosa_(Barcelona_Metro)", "kind": "wikipedia", "quote": "The station opened in September 2011 in a previously built line section between Fondo and Can Peixauet.", "tier": "tertiary", "title": "Santa Rosa (Barcelona Metro) - Wikipedia", "url": "https://en.wikipedia.org/wiki/Santa_Rosa_(Barcelona_Metro)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251128232910/https://en.wikipedia.org/wiki/Barcelona_Metro_line_9", "kind": "wikipedia", "title": "Barcelona Metro line 9 — Wikipedia (Santa Rosa opened 19 Sep 2011)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_9" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613160738/https://www.ara.cat/societat/santa-coloma-estrenara-l9-rosa_1_2561313.html", "kind": "news", "publisher": "Ara", "quote": "Santa Coloma estrenarà dilluns l'estació Santa Rosa de la L9 (published 16 September 2011; 'dilluns' = Monday = 19 September 2011)", "tier": "secondary", "title": "Santa Coloma estrenarà dilluns l'estació Santa Rosa de la L9", "url": "http://www.ara.cat/societat/Santa-Coloma-estrenara-L9-Rosa_0_555544557.html", "via": "https://ca.wikipedia.org/wiki/L%C3%ADnia_9_del_metro_de_Barcelona" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251128232910/https://en.wikipedia.org/wiki/Barcelona_Metro_line_9", "kind": "wikipedia", "tier": "tertiary", "title": "Barcelona Metro line 9 — Wikipedia", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_9" } ] }, { "cityId": "barcelona", "color": "#FE5000", "displayNumber": "L9S", "id": "barcelona-line-L9S", "name": { "en": "L9 Sud (Zona Universitària ↔ Aeroport T1)", "nl": "Línia 9 Sud" }, "phases": [ { "confidence": "high", "constructionStart": "2003", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "EUR", "isEstimate": false, "value": 2899000000, "year": 2016 }, "notes": "Accumulated investment for the L9 Sud segment (Aeroport↔Zona Universitària), ≈ €2,899M. The full automated L9/L10 mega-project — central connecting tunnel still unbuilt — is the oft-cited ~€6.5bn+ total (hugely over budget); we record the verified L9S segment figure here rather than the whole-project total to avoid overstating a single segment. [Citation chase 2026-06-11] The €2,899M L9 Sud segment figure is confirmed by the Generalitat de Catalunya's own press release (Govern.cat, 10 Feb 2016) and an EFE wire dated at the 12 Feb 2016 opening, reported as accumulated investment in the completed 20 km / 15-station segment. For context, the Sindicatura de Comptes (Informe 24/2020) audited whole-project investment at €4,796M plus €2,120M financial costs to 31 Dec 2016, consistent with the segment being a subset of the incomplete L9/L10 total.", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260611112235/https://www.railway-technology.com/projects/barcelona-metro-line-9/", "kind": "other", "title": "Barcelona Metro Line 9 — Railway Technology (€6.5bn est.; 47.8 km; 50 stations; EIB €1.3bn)", "url": "https://www.railway-technology.com/projects/barcelona-metro-line-9/" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251016184804/https://www.barcelona-metropolitan.com/features/the-big-dig-barcelonas-metro-line-9/", "kind": "news", "title": "The big dig: Barcelona's metro line 9 — Barcelona Metropolitan (€2.25bn budget → €6.5bn)", "url": "https://www.barcelona-metropolitan.com/features/the-big-dig-barcelonas-metro-line-9/" } ] }, "geometryRef": "barcelona-L9S", "id": "barcelona-l9s-2016", "kind": "initial", "label": { "en": "L9 Sud opens (automated, airport branch): Zona Universitària → Aeroport T1" }, "notes": "[Date chase 2026-06-12] Construction-start year is contested between sources: 2002 = ATM civil/design works begin (railway-technology.com and Wikipedia body); 2003 = TBM tunneling begins (TunnelTalk). Curated 2003 reflects tunneling start; the broader construction-start convention favors 2002. [Opening-date chase 2026-06-13] Opening date originally scheduled for 19 Feb 2016 was moved forward to 12 Feb to coincide with Mobile World Congress (La Vanguardia, 21 Jan 2016). First-day rides free; charged service began Mon 15 Feb. Three of the 18 stations (Camp Nou, La Ribera/Centre Direccional, Aeroport Terminal de Càrrega) did not open with the rest; the opened section had 15 stations as labeled.", "opened": "2016-02-12", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251128232910/https://en.wikipedia.org/wiki/Barcelona_Metro_line_9", "kind": "wikipedia", "quote": "On February 12, 2016 the El Prat branch opened from Aeroport T1 to Zona Universitària stations. This is a 20 km (12.4 mi) section with 15 stations.", "tier": "tertiary", "title": "Barcelona Metro line 9 — Wikipedia (airport branch opened 12 Feb 2016, 15 stations)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_9" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20250804213558/https://tunneltalk.com/TBM-Recorder-Jun10-Cutterhead-change.php", "kind": "other", "publisher": "Tunnel Talk", "quote": "The 11.95m diameter machine has been working on the Metro's Line 9 project for the UTE LINIA 9 consortium of the Spanish and Catalan companies FCC / FERROVIAL / OHL / COPSICA / COPISA since 2003.", "tier": "secondary", "title": "Second cutterhead change for Barcelona TBM — Tunnel Talk", "url": "http://www.tunneltalk.com/TBM-Recorder-Jun10-Cutterhead-change.php", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_9" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613160906/https://www.lavanguardia.com/local/barcelona/20160121/301578627850/metro-el-prat-funcionar-12-de-febrero.html", "kind": "news", "publisher": "La Vanguardia", "quote": "la entrada en funcionamiento del tramo de la línea 9 del metro comprendido entre Zona Universitaria y el aeropuerto de El Prat se adelanta al próximo día 12 de febrero", "tier": "secondary", "title": "El metro al aeropuerto de Barcelona comenzará a funcionar el 12 de febrero — La Vanguardia", "url": "http://www.lavanguardia.com/local/barcelona/20160121/301578627850/metro-el-prat-funcionar-12-de-febrero.html", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_9" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20180803193956/http://premsa.gencat.cat/pres_fsvp/AppJava/notapremsavw/290696/ca/metro-arriba-laeroport-barcelona-ll9sud.do", "kind": "primary", "publisher": "Generalitat de Catalunya (Govern)", "quote": "A partir del 12 de febrer entrarà en servei la nova línia 9 sud de metro que uneix la Zona Universitària i la T1 de l'aeroport de Barcelona-el Prat.", "tier": "primary", "title": "El metro arriba a l'aeroport de Barcelona amb l'L9sud — Generalitat de Catalunya", "url": "http://premsa.gencat.cat/pres_fsvp/AppJava/notapremsavw/290696/ca/metro-arriba-laeroport-barcelona-ll9sud.do", "via": "https://ca.wikipedia.org/wiki/L%C3%ADnia_9_del_metro_de_Barcelona" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20241202045855/http://www.elpuntavui.cat/territori/article/12-infraestructures/941176-entra-en-servei-la-linia-9-sud-del-metro-de-barcelona-que-enllaca-amb-laeroport.html", "kind": "news", "publisher": "El Punt Avui", "quote": "El tram sud de la línia 9 del metro de Barcelona, que connecta la capital catalana amb l'Aeroport del Prat a través de l'Hospitalet de Llobregat i el Prat de Llobregat, ha entrat en servei pocs minuts abans de les tres de la tarda d'aquest divendres. [...] A la terminal T1 de l'Aeroport del Prat, l'estació s'ha obert a les 14.55 hores.", "tier": "secondary", "title": "Entra en servei la línia 9 sud del metro, que enllaça Barcelona amb l'Aeroport — El Punt Avui", "url": "http://www.elpuntavui.cat/territori/article/12-infraestructures/941176-entra-en-servei-la-linia-9-sud-del-metro-de-barcelona-que-enllaca-amb-laeroport.html", "via": "https://ca.wikipedia.org/wiki/L%C3%ADnia_9_del_metro_de_Barcelona" } ], "stationCount": 15 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251128232910/https://en.wikipedia.org/wiki/Barcelona_Metro_line_9", "kind": "wikipedia", "tier": "tertiary", "title": "Barcelona Metro line 9 — Wikipedia", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_9" } ] }, { "cityId": "barcelona", "color": "#00ADEF", "displayNumber": "L10 Nord", "id": "barcelona-line-L10N", "name": { "en": "L10 Nord (La Sagrera ↔ Gorg)", "nl": "Línia 10 Nord" }, "phases": [ { "confidence": "medium", "constructionStart": "2003", "geometryRef": "barcelona-L10 Nord", "id": "barcelona-l10n-2010-apr", "kind": "initial", "label": { "en": "L10 Nord opens: Bon Pastor → Gorg (Llefià, La Salut)" }, "notes": "First L10 section opened 18 Apr 2010 (Bon Pastor up to Gorg, via Llefià and La Salut, into Badalona). L10 shares the automated L9 trunk between La Sagrera and Bon Pastor and branches north to Gorg. Cost is carried once on L9 Sud (whole L9/L10 program) to avoid double-counting. [Date chase 2026-06-12] Construction on the Besos/Badalona branch (underlying the L10 Nord Gorg-Bon Pastor segment) began September 2003 per Catalan Wikipedia L9 and L10 articles, both citing Anuari territorial de Catalunya v. 2003, p. 220 (Institut d'Estudis Catalans, offline). English Wikipedia carries no construction-start info.", "opened": "2010-04-18", "segment": { "fromStopIndex": 2, "toStopIndex": 5 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260208020531/https://en.wikipedia.org/wiki/Barcelona_Metro_line_10", "kind": "wikipedia", "quote": "the section from La Sagrera to Bon Pastor (except Sagrera | TAV station) opened 26 June 2010. ... The section from Gorg to Bon Pastor opened on 18 April 2010", "tier": "tertiary", "title": "Barcelona Metro line 10 — Wikipedia (Gorg–Bon Pastor 18 Apr 2010)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_10" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260109053555/https://ca.wikipedia.org/wiki/L%C3%ADnia_9_del_metro_de_Barcelona", "kind": "other", "publisher": "Wikimedia Foundation (Catalan Wikipedia)", "quote": "Les obres van començar el setembre de 2003 a Badalona amb un cost inicial previst de 1.947 milions d'euros.", "tier": "secondary", "title": "Línia 9 del metro de Barcelona — Viquipèdia", "url": "https://ca.wikipedia.org/wiki/L%C3%ADnia_9_del_metro_de_Barcelona", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_10" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260314095534/https://ca.wikipedia.org/wiki/L%C3%ADnia_10_del_metro_de_Barcelona", "kind": "other", "publisher": "Wikimedia Foundation (Catalan Wikipedia)", "quote": "Al ramal de la L10 a Badalona va ser on van començar primer les obres. Aquestes es van iniciar el setembre de 2003 a Badalona.", "tier": "secondary", "title": "Línia 10 del metro de Barcelona — Viquipèdia", "url": "https://ca.wikipedia.org/wiki/L%C3%ADnia_10_del_metro_de_Barcelona", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_10" } ], "stationCount": 4 }, { "confidence": "high", "geometryRef": "barcelona-L10 Nord", "id": "barcelona-l10n-2010-jun", "kind": "extension", "label": { "en": "Trunk to centre: Bon Pastor → La Sagrera (shared with L9)" }, "notes": "La Sagrera–Bon Pastor section opened 26 Jun 2010 (Sagrera TAV platform opened later). This stretch is physically the shared automated trunk used by both L9 Nord and L10 Nord; drawn here on the L10 spine and overlapping the L9 Nord spine in its own colour. [Opening-date chase 2026-06-13] betevé article confirms same-day revenue service on 26 June 2010 (Onze de Setembre + La Sagrera stations); no separate ceremonial pre-opening date found.", "opened": "2010-06-26", "segment": { "fromStopIndex": 0, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260208020531/https://en.wikipedia.org/wiki/Barcelona_Metro_line_10", "kind": "wikipedia", "quote": "the section from La Sagrera to Bon Pastor (except Sagrera | TAV station) opened 26 June 2010. ... The section from Gorg to Bon Pastor opened on 18 April 2010", "tier": "tertiary", "title": "Barcelona Metro line 10 — Wikipedia (La Sagrera–Bon Pastor 26 Jun 2010)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_10" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260314095534/https://ca.wikipedia.org/wiki/L%C3%ADnia_10_del_metro_de_Barcelona", "kind": "other", "publisher": "Viquipèdia (Catalan Wikipedia)", "quote": "fins a la Sagrera transcorre juntament amb l'L9, tram que va ser inaugurat el 26 de juny del 2010.", "tier": "tertiary", "title": "Línia 10 del metro de Barcelona — Viquipèdia", "url": "https://ca.wikipedia.org/wiki/L%C3%ADnia_10_del_metro_de_Barcelona", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_10" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251108232258/https://beteve.cat/mobilitat/la-linia-9-arriba-fins-a-la-sagrera/", "kind": "news", "publisher": "betevé (Barcelona local broadcaster)", "quote": "Quan falta menys d'una hora per a la posada en marxa de les parades de l'Onze de Setembre i de la Sagrera [article published 2010-06-26T15:10:35+02:00 per JSON-LD datePublished]", "tier": "secondary", "title": "La Línia 9 arriba fins a la Sagrera — betevé", "url": "https://beteve.cat/mobilitat/la-linia-9-arriba-fins-a-la-sagrera/", "via": "https://ca.wikipedia.org/wiki/L%C3%ADnia_10_del_metro_de_Barcelona" } ], "stationCount": 2 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260208020531/https://en.wikipedia.org/wiki/Barcelona_Metro_line_10", "kind": "wikipedia", "tier": "tertiary", "title": "Barcelona Metro line 10 — Wikipedia", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_10" } ] }, { "cityId": "barcelona", "color": "#009FE3", "displayNumber": "L10S", "id": "barcelona-line-L10S", "name": { "en": "L10 Sud (Collblanc ↔ ZAL │ Riu Vell)", "nl": "Línia 10 Sud" }, "phases": [ { "confidence": "high", "constructionStart": "2003", "geometryRef": "barcelona-L10S", "id": "barcelona-l10s-2018", "kind": "initial", "label": { "en": "L10 Sud opens: Collblanc → Foc" }, "notes": "L10 Sud opened 8 Sep 2018 (Collblanc–Foc), branching off the shared automated L9 trunk at Can Tries–Gornal. The interior stations Provençana (opened 2 Mar 2019) and Ciutat de la Justícia (opened 23 Nov 2019) were infilled later on this same alignment — their geometry is covered by this segment; see the dedicated infill phases below. Cost carried once on L9 Sud (whole L9/L10 program). [Date chase 2026-06-12] L9 and L10 share one integrated tunnel; the 2003 constructionStart is the Sep 2003 Badalona groundbreaking for the unified L9/L10 project. Catalan Wikipedia states L10 Sud works at the Zona Franca specifically began in July 2005; en.wiki line 9 and railway-technology.com cite 2002 as the overall project start. Year remains source-dependent (2002-2005).", "opened": "2018-09-08", "segment": { "fromStopIndex": 0, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260208020531/https://en.wikipedia.org/wiki/Barcelona_Metro_line_10", "kind": "wikipedia", "quote": "On 8 September 2018 the section between Foc station and the junction with the main route of line 9 at Can Tries Gornal opened to the public, with the exception of the stations Ciutat de la Justícia and Provençana.", "tier": "tertiary", "title": "Barcelona Metro line 10 — Wikipedia (Collblanc–Foc 8 Sep 2018)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_10" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260314095534/https://ca.wikipedia.org/wiki/L%C3%ADnia_10_del_metro_de_Barcelona", "kind": "other", "publisher": "Wikimedia Foundation", "quote": "Al ramal de la L10 a Badalona va ser on van començar primer les obres. Aquestes es van iniciar el setembre de 2003 a Badalona. [...] Al juliol van começar les obres a la Zona Franca", "tier": "secondary", "title": "Línia 10 del metro de Barcelona — Viquipèdia", "url": "https://ca.wikipedia.org/wiki/L%C3%ADnia_10_del_metro_de_Barcelona", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_10" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20241126155450/https://www.lavanguardia.com/local/barcelona/20180808/451250378165/las-estaciones-de-foneria-y-foc-cisell-de-la-l10-de-metro-entraran-en-servicio-el-8-de-septiembre.html", "kind": "news", "publisher": "La Vanguardia (Europa Press wire)", "quote": "Las estaciones de Foneria y Foc Cisell de la línea L10 Sud del Metro de Barcelona entrarán en servicio para la ciudadanía el próximo 8 de septiembre, después de que Transports Metropolitans de Barcelona (TMB) haya realizado durante las semanas de julio y agosto las pruebas correspondientes.", "tier": "secondary", "title": "El metro de la Zona Franca, en servicio el 8 de septiembre — La Vanguardia", "url": "https://www.lavanguardia.com/local/barcelona/20180808/451250378165/las-estaciones-de-foneria-y-foc-cisell-de-la-l10-de-metro-entraran-en-servicio-el-8-de-septiembre.html", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_10" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20230709095431/https://www.ccma.cat/324/dues-estacions-de-la-l10-sud-del-metro-a-zona-franca-en-servei-el-8-de-setembre/noticia/2870452/", "kind": "news", "publisher": "CCMA / 3CatInfo (Catalan public broadcaster)", "quote": "Les estacions de Foneria i Foc Cisell de la línia L10 Sud del Metro de Barcelona entraran en servei el 8 de setembre, després que Transports Metropolitans de Barcelona hagi fet durant les setmanes de juliol i agost les proves corresponents.", "tier": "secondary", "title": "Dues estacions de l'L10 Sud del metro a Zona Franca, en servei el 8 de setembre — 3CatInfo (CCMA)", "url": "http://www.ccma.cat/324/dues-estacions-de-la-l10-sud-del-metro-a-zona-franca-en-servei-el-8-de-setembre/noticia/2870452/", "via": "https://ca.wikipedia.org/wiki/L%C3%ADnia_10_del_metro_de_Barcelona" } ], "stationCount": 5 }, { "confidence": "medium", "geometryRef": null, "id": "barcelona-l10s-2019-provencana", "kind": "extension", "label": { "en": "Infill station opens: Provençana" }, "notes": "Interior infill on the 2018 L10 Sud alignment; geometry already drawn, no separate cost.", "opened": "2019-03-02", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260208020531/https://en.wikipedia.org/wiki/Barcelona_Metro_line_10", "kind": "wikipedia", "quote": "Provençana station opened to the public on 2 March 2019", "tier": "tertiary", "title": "Barcelona Metro line 10 — Wikipedia (Provençana 2 Mar 2019)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_10" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251115162150/https://noticies.tmb.cat/sala-de-premsa/lestacio-de-provencana-de-linia-10-sud-de-metro-obrira-portes-dema-3-de-tarda", "kind": "primary", "publisher": "Transports Metropolitans de Barcelona (TMB)", "quote": "L'obertura al públic de l'estació de Provençana, llargament reivindicada pels veïns, serà efectiva aquest dissabte, 2 de març, a partir de les 15 hores aproximadament, després de l'acte inaugural.", "tier": "primary", "title": "L'estació de Provençana de la línia 10 Sud de metro obrirà les portes demà a les 3 de la tarda — TMB Notícies", "url": "https://noticies.tmb.cat/sala-de-premsa/lestacio-de-provencana-de-linia-10-sud-de-metro-obrira-portes-dema-3-de-tarda", "via": "https://ca.wikipedia.org/wiki/Estaci%C3%B3_de_Proven%C3%A7ana" } ], "stationCount": 1 }, { "confidence": "high", "geometryRef": null, "id": "barcelona-l10s-2019-ciutatjusticia", "kind": "extension", "label": { "en": "Infill station opens: Ciutat de la Justícia" }, "notes": "Interior infill on the 2018 L10 Sud alignment; geometry already drawn, no separate cost. [Opening-date chase 2026-06-13] English Wikipedia narrative text says '24 November 2019'; primary Gencat source and El Nacional confirm the correct public opening was 23 November 2019.", "opened": "2019-11-23", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260208020531/https://en.wikipedia.org/wiki/Barcelona_Metro_line_10", "kind": "wikipedia", "quote": "Provençana station opened to the public on 2 March 2019", "tier": "tertiary", "title": "Barcelona Metro line 10 — Wikipedia (Ciutat de la Justícia 23 Nov 2019)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_10" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20241215214002/https://www.elnacional.cat/ca/societat/metro-l10-sud-ciutat-justicia-estacio_444618_102.html", "kind": "news", "publisher": "El Nacional (Catalan news outlet)", "quote": "Barcelona. Dissabte, 23 de novembre de 2019. [Article dateline and coverage of opening]", "tier": "secondary", "title": "S'inaugura la nova estació de Ciutat de la Justícia, de la L10 — El Nacional", "url": "https://www.elnacional.cat/ca/societat/metro-l10-sud-ciutat-justicia-estacio_444618_102.html", "via": "https://ca.wikipedia.org/wiki/Estaci%C3%B3_d%27Ildefons_Cerd%C3%A0_-_Ciutat_de_la_Just%C3%ADcia" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613160804/https://web.gencat.cat/ca/ciutadania/actualitat", "kind": "primary", "publisher": "Generalitat de Catalunya", "quote": "el metro s'inaugurarà dissabte 23 de novembre, a les 12.30 hores. La nova parada ha comportat una inversió de 80 milions d'euros", "tier": "primary", "title": "El metro arriba a la Ciutat de la Justícia — Generalitat de Catalunya (gencat.cat)", "url": "https://web.archive.org/web/20191201233802/http://web.gencat.cat/ca/actualitat/detall/El-metro-arriba-a-la-Ciutat-de-la-Justicia", "via": "https://ca.wikipedia.org/wiki/Estaci%C3%B3_d%27Ildefons_Cerd%C3%A0_-_Ciutat_de_la_Just%C3%ADcia" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "barcelona-L10S", "id": "barcelona-l10s-2020", "kind": "extension", "label": { "en": "South extension: Foc → Zona Franca" }, "notes": "[Opening-date chase 2026-06-13] Motors station was excluded from this opening and entered service later.", "opened": "2020-02-01", "segment": { "fromStopIndex": 6, "toStopIndex": 7 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260208020531/https://en.wikipedia.org/wiki/Barcelona_Metro_line_10", "kind": "wikipedia", "quote": "The section between Foc and Zona Franca, with the exception of the Motors station, opened on 1 February 2020.", "tier": "tertiary", "title": "Barcelona Metro line 10 — Wikipedia (Foc–Zona Franca 1 Feb 2020)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_10" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613160900/https://web.gencat.cat/ca/ciutadania/actualitat", "kind": "primary", "publisher": "Generalitat de Catalunya", "quote": "La nova estació Zona Franca de l'L10 sud de metro començarà a funcionar dissabte a les 15 hores. La nova parada serà la vuitena estació de l'L10 Sud i la número 159 de la xarxa de metro, després de la de Ciutat de la Justícia que es va posar en servei el novembre passat.", "tier": "primary", "title": "Obre l'estació Zona Franca de l'L10 sud de metro — Generalitat de Catalunya", "url": "https://web.archive.org/web/20200201103110/https://web.gencat.cat/ca/actualitat/detall/Obre-lestacio-Zona-Franca-de-lL10-sud-de-metro", "via": "https://ca.wikipedia.org/wiki/Estaci%C3%B3_de_Zona_Franca" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "barcelona-L10S", "id": "barcelona-l10s-2021", "kind": "extension", "label": { "en": "South extension: Zona Franca → ZAL │ Riu Vell" }, "opened": "2021-11-07", "segment": { "fromStopIndex": 7, "toStopIndex": 10 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260208020531/https://en.wikipedia.org/wiki/Barcelona_Metro_line_10", "kind": "wikipedia", "quote": "On 7 November 2021, the section from Zona Franca to ZAL - Riu Vell opened to the public.", "tier": "tertiary", "title": "Barcelona Metro line 10 — Wikipedia (Zona Franca–ZAL Riu Vell 7 Nov 2021)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_10" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613160905/https://web.gencat.cat/ca/ciutadania/actualitat", "kind": "primary", "publisher": "Generalitat de Catalunya", "quote": "Tres noves estacions de l'L10 a la Zona Franca es posen en marxa el diumenge, 7 de novembre. Són les estacions de Port Comercial/La Factoria, Ecoparc i ZAL/Riu Vell, al barri de la Marina del Prat Vermell.", "tier": "primary", "title": "En marxa tres noves estacions de l'L10 a la Zona Franca — Generalitat de Catalunya", "url": "https://web.archive.org/web/20220826231400/https://web.gencat.cat/ca/actualitat/detall/En-marxa-tres-noves-estacions-de-lL10-a-la-Zona-Franca", "via": "https://ca.wikipedia.org/wiki/Estaci%C3%B3_de_ZAL_-_Riu_Vell" } ], "stationCount": 3 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260208020531/https://en.wikipedia.org/wiki/Barcelona_Metro_line_10", "kind": "wikipedia", "tier": "tertiary", "title": "Barcelona Metro line 10 — Wikipedia", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_10" } ] }, { "cityId": "barcelona", "color": "#97D700", "displayNumber": "L11", "id": "barcelona-line-L11", "name": { "en": "L11 (Trinitat Nova ↔ Can Cuiàs)", "nl": "Línia 11" }, "phases": [ { "confidence": "high", "constructionStart": "2001", "cost": { "basis": "budget", "confidence": "medium", "nominal": { "currency": "EUR", "isEstimate": false, "value": 86000000, "year": 2003 }, "notes": "Final cost of the L11 automated shuttle (Trinitat Nova↔Can Cuiàs); initial budget €48M, revised to €86M. [Citation chase 2026-06-11] Source phrasing describes €86M as a revised budget (\"pressupost\"), up from an initial €48M budget, rather than an audited final outturn. The figure rests solely on the Catalan Wikipedia text, whose only underlying citation is the offline print Anuari Territorial de Catalunya (2003); no independent online source corroborates it.", "sources": [ { "accessedAt": "2026-06-06", "archivedUrl": "https://web.archive.org/web/20260412130005/https://ca.wikipedia.org/wiki/L%C3%ADnia_11_del_metro_de_Barcelona", "kind": "wikipedia", "tier": "tertiary", "title": "Línia 11 del metro de Barcelona — Viquipèdia", "url": "https://ca.wikipedia.org/wiki/L%C3%ADnia_11_del_metro_de_Barcelona" } ] }, "geometryRef": "barcelona-L11", "id": "barcelona-l11-2003", "kind": "initial", "label": { "en": "L11 opens (automated): Trinitat Nova → Can Cuiàs" }, "notes": "Barcelona's first driverless line, the short 2.1 km L11 (Trinitat Nova–Can Cuiàs, 5 stations, into Montcada i Reixac), opened 14 Dec 2003 as a pilot for the automation later used on L9/L10. No isolated construction cost is published online (archival-only), so no cost figure is recorded — treat as UNKNOWN. [Date chase 2026-06-12] Arxiu Històric source records ceremonial groundbreaking 26 January 2001 and the actual start of works 7 July 2001 — both within the curated year 2001. [Opening-date chase 2026-06-13] Curated 2003-12-14 is the ceremonial/popular inauguration at Trinitat Nova (Sunday); per TMB operator, official revenue service began the next day, 2003-12-15 (Monday).", "opened": "2003-12-14", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20250910091809/https://en.wikipedia.org/wiki/Barcelona_Metro_line_11", "kind": "wikipedia", "quote": "After an agreement to build the line between the Generalitat de Catalunya and neighbourhood associations was signed in 1999, construction started in 2001. The entire segment between Trinitat Nova and Can Cuiàs opened on December 14, 2003.", "tier": "tertiary", "title": "Barcelona Metro line 11 — Wikipedia (opened 14 Dec 2003)", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_11" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260218184154/https://arxiuhistoric.blogspot.com/2014/07/historia-del-metro-nou-barris-v-anys.html", "kind": "other", "publisher": "Arxiu Històric de Roquetes-Nou Barris", "quote": "El 26 de gener de 2001 es va fer l'acte de col·locació de la primera pedra que simbolitzava l'inici de les obres de construcció de la nova L11. De tota manera, l'inici real de les obres no es va fer fins el 7 de juliol següent.", "tier": "secondary", "title": "Història del metro a Nou Barris (V): anys d'expansió i d'inauguracions", "url": "https://arxiuhistoric.blogspot.com/2014/07/historia-del-metro-nou-barris-v-anys.html", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_11" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250908085110/https://www.3cat.cat/324/una-festa-popular-inaugura-la-nova-linia-11-del-metro-que-enllaca-nou-barris-i-montcada/noticia/53666/", "kind": "news", "publisher": "3cat.cat (324/Catalunya Ràdio)", "quote": "Una festa popular ha inaugurat la nova línia 11 del Metro [...] a partir de dilluns, circularan simultàniament dos trens", "tier": "secondary", "title": "Una festa popular inaugura la nova línia 11 del metro, que enllaça Nou Barris i Montcada", "url": "https://www.3cat.cat/324/una-festa-popular-inaugura-la-nova-linia-11-del-metro-que-enllaca-nou-barris-i-montcada/noticia/53666/", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_11" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260604115352/https://noticies.tmb.cat/historia/linia-11-dues-decades-de-metro-lleuger", "kind": "primary", "publisher": "noticies.tmb.cat (TMB — operator)", "quote": "va ser la segona línia del metro en implantar la conducció automàtica. Tot i que es va posar en servei oficialment el 15 de desembre de 2003 [...] una festa popular a l'estació de Trinitat Nova inaugurava un dia abans la línia 11 del metro", "tier": "primary", "title": "Línia 11, dues dècades de metro lleuger", "url": "https://noticies.tmb.cat/historia/linia-11-dues-decades-de-metro-lleuger", "via": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_11" } ], "stationCount": 5 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20250910091809/https://en.wikipedia.org/wiki/Barcelona_Metro_line_11", "kind": "wikipedia", "tier": "tertiary", "title": "Barcelona Metro line 11 — Wikipedia", "url": "https://en.wikipedia.org/wiki/Barcelona_Metro_line_11" } ] } ], "name": { "en": "Barcelona", "nl": "Barcelona" } }, { "bbox": [ 13.18, 52.41, 13.64, 52.6 ], "center": [ 13.4, 52.52 ], "country": "Germany", "defaultZoom": 10, "homeCurrency": "EUR", "id": "berlin", "lines": [ { "cityId": "berlin", "color": "#7DAD4C", "displayNumber": "U1", "id": "berlin-line-U1", "name": { "de": "U1 — Stammstrecke (Hochbahn)", "en": "U1 (Uhlandstraße ↔ Warschauer Straße)" }, "phases": [ { "confidence": "medium", "constructionStart": "1896", "geometryRef": "berlin-U1", "id": "berlin-u1-1902-stammstrecke", "kind": "initial", "label": { "en": "Berlin's first U-Bahn (Stammstrecke): Gleisdreieck → Warschauer Brücke" }, "notes": "Built in the Goldmark/Reichsmark era. No reliable, natively-sourced construction cost was found; the prior euro figure was era-mislabeled (the period used Goldmark/Reichsmark) and is not reliably convertible to 2026€, so no cost is recorded. [Date chase 2026-06-12] Groundbreaking dated to 10 September 1896 (Gitschiner Straße) by EN and DE Wikipedia; DE article attributes the surrounding history to Bousset, Die Berliner U-Bahn (1935), an offline print source. [Opening-date chase 2026-06-13] 15 February 1902 was the 'Ministerfahrt' (VIP ceremonial inaugural run attended by Prussian minister Karl von Thielen); the public revenue-service opening was 18 February 1902.", "opened": "1902-02-18", "segment": { "fromStopIndex": 5, "toStopIndex": 12 }, "sources": [ { "accessedAt": "2026-06-06", "archivedUrl": "https://web.archive.org/web/20251219132430/https://de.wikipedia.org/wiki/U-Bahn-Linie_1_(Berlin)", "kind": "wikipedia", "quote": "Am 18. Februar 1902 wurde die erste Teilstrecke der Berliner U-Bahn offiziell eröffnet (Stralauer Tor – Potsdamer Platz).", "tier": "secondary", "title": "U-Bahn-Linie 1 (Berlin) — Wikipedia (DE)", "url": "https://de.wikipedia.org/wiki/U-Bahn-Linie_1_(Berlin)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260215112230/https://en.wikipedia.org/wiki/U1_(Berlin_U-Bahn)", "kind": "wikipedia", "title": "U1 (Berlin U-Bahn) — Wikipedia (Stammstrecke opened 18 Feb 1902)", "url": "https://en.wikipedia.org/wiki/U1_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260203065648/https://de.wikipedia.org/wiki/U-Bahn-Linie_U1_(Berlin)", "kind": "other", "publisher": "Wikipedia (DE)", "quote": "Der erste Spatenstich war am 10. September 1896 in der Gitschiner Straße.", "tier": "secondary", "title": "U-Bahn-Linie U1 (Berlin) — Wikipedia (DE)", "url": "https://de.wikipedia.org/wiki/U-Bahn-Linie_U1_(Berlin)", "via": "https://de.wikipedia.org/wiki/U-Bahn-Linie_1_(Berlin)" } ], "stationCount": 7 }, { "confidence": "low", "geometryRef": "berlin-U1", "id": "berlin-u1-1913-wittenbergplatz", "kind": "extension", "label": { "en": "West branch: Gleisdreieck → Wittenbergplatz → Uhlandstraße" }, "opened": "1913-10-12", "segment": { "fromStopIndex": 1, "toStopIndex": 5 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260215112230/https://en.wikipedia.org/wiki/U1_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "This branch opened on 12 October 1913 along with the Dahlem line", "tier": "secondary", "title": "U1 (Berlin U-Bahn) — Wikipedia (Wittenbergplatz–Uhlandstraße branch, 12 Oct 1913)", "url": "https://en.wikipedia.org/wiki/U1_(Berlin_U-Bahn)" } ], "stationCount": 3 }, { "confidence": "low", "geometryRef": "berlin-U1", "id": "berlin-u1-1961-kurfurstendamm", "kind": "extension", "label": { "en": "Kurfürstendamm station inserted on the western branch" }, "notes": "[Opening-date chase 2026-06-13] Originally scheduled for 2 September 1961 (with U9/Line G); after the Berlin Wall was erected on 13 August 1961 the opening was moved forward to 28 August 1961, which is the actual revenue-service date.", "opened": "1961-08-28", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260215112230/https://en.wikipedia.org/wiki/U1_(Berlin_U-Bahn)", "kind": "wikipedia", "title": "U1 (Berlin U-Bahn) — Wikipedia (Kurfürstendamm opened 28 Aug 1961)", "url": "https://en.wikipedia.org/wiki/U1_(Berlin_U-Bahn)" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260215112230/https://en.wikipedia.org/wiki/U1_(Berlin_U-Bahn)", "kind": "wikipedia", "tier": "secondary", "title": "U1 (Berlin U-Bahn) — Wikipedia", "url": "https://en.wikipedia.org/wiki/U1_(Berlin_U-Bahn)" } ] }, { "cityId": "berlin", "color": "#DA421E", "displayNumber": "U2", "id": "berlin-line-U2", "name": { "de": "U2 — Stammstrecke / Charlottenburg / Centrumslinie", "en": "U2 (Pankow ↔ Ruhleben)" }, "phases": [ { "confidence": "medium", "constructionStart": "1896", "geometryRef": "berlin-U2", "id": "berlin-u2-1902-zoo", "kind": "initial", "label": { "en": "Original 1902 trunk: Potsdamer Platz → Zoologischer Garten → Knie" }, "notes": "[Date chase 2026-06-12] First sod (erster Spatenstich) turned 10 September 1896 in Gitschiner Straße; DE Wikipedia cites Bousset, 'Die Berliner U-Bahn' (1935) for context. [Opening-date chase 2026-06-13] Phase label spans the full Potsdamer Platz–Zoo–Knie corridor; the trunk's first segment opened 18 Feb 1902, extended to Zoo in March 1902, and reached Knie on 14 Dec 1902.", "opened": "1902-12-14", "segment": { "fromStopIndex": 13, "toStopIndex": 21 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260128013500/https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "On 18 February 1902 the first stage of the Berlin U-Bahn was officially opened (Stralauer Tor–Potsdamer Platz).", "tier": "secondary", "title": "U2 (Berlin U-Bahn) — Wikipedia (1902 trunk to Knie/Ernst-Reuter-Platz)", "url": "https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260613160913/https://en.wikipedia.org/wiki/History_of_the_Berlin_U-Bahn", "kind": "other", "publisher": "Wikipedia (English)", "quote": "After years of negotiations, construction began on a mainly elevated railway line on 10 September 1896.", "tier": "secondary", "title": "History of the Berlin U-Bahn — Wikipedia", "url": "https://en.wikipedia.org/wiki/History_of_the_Berlin_U-Bahn", "via": "https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)" } ], "stationCount": 8 }, { "confidence": "medium", "geometryRef": "berlin-U2", "id": "berlin-u2-1908-charlottenburg", "kind": "extension", "label": { "en": "Charlottenburg extension: Knie → Wilhelmplatz → Reichskanzlerplatz" }, "notes": "[Opening-date chase 2026-06-13] 1908-03-16 is the ceremonial 'minister ride' opening; public/revenue service opened 1908-03-29 per both Wikipedia sources. Consider correcting day to 1908-03-29 for revenue-opening consistency.", "opened": "1908-03-16", "segment": { "fromStopIndex": 21, "toStopIndex": 24 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260128013500/https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "16 March 1908: Emperor Wilhelm II opened the western extension. \"It was officially inaugurated on 29 March 1908.\"", "tier": "secondary", "title": "U2 (Berlin U-Bahn) — Wikipedia (Charlottenburg extension opened 1906/1908)", "url": "https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613160913/https://en.wikipedia.org/wiki/History_of_the_Berlin_U-Bahn", "kind": "other", "publisher": "Wikipedia", "quote": "Emperor Wilhelm II opened the line on 16 March 1908, and the inaugural trip became known as the 'minister ride'. It was opened to the public on 29 March 1908.", "tier": "secondary", "title": "History of the Berlin U-Bahn — Wikipedia", "url": "https://en.wikipedia.org/wiki/History_of_the_Berlin_U-Bahn", "via": "https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)" } ], "stationCount": 3 }, { "confidence": "medium", "geometryRef": "berlin-U2", "id": "berlin-u2-1913-spittelmarkt", "kind": "extension", "label": { "en": "Centrumslinie east: Potsdamer Platz → Spittelmarkt → Alexanderplatz → Schönhauser Allee" }, "notes": "Built in the Goldmark/Reichsmark era. No reliable, natively-sourced construction cost was found; the prior euro figure was era-mislabeled (the period used Goldmark/Reichsmark) and is not reliably convertible to 2026€, so no cost is recorded. [Opening-date chase 2026-06-13] Spittelmarkt–Alexanderplatz opened 1 July 1913; the northern extension to Nordring (Schönhauser Allee) followed 27 July 1913, the date covering the full phase.", "opened": "1913-07-27", "segment": { "fromStopIndex": 2, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260128013500/https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "1 July 1913: Extended from Spittelmarkt to Alexanderplatz", "tier": "secondary", "title": "U2 (Berlin U-Bahn) — Wikipedia (east to Schönhauser Allee 27 Jul 1913)", "url": "https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613160913/https://en.wikipedia.org/wiki/History_of_the_Berlin_U-Bahn", "kind": "other", "publisher": "Wikipedia", "quote": "27 July 1913: Alexanderplatz – Nordring", "tier": "secondary", "title": "History of the Berlin U-Bahn — Wikipedia", "url": "https://en.wikipedia.org/wiki/History_of_the_Berlin_U-Bahn", "via": "https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)" } ], "stationCount": 7 }, { "confidence": "medium", "geometryRef": "berlin-U2", "id": "berlin-u2-1929-ruhleben", "kind": "extension", "label": { "en": "West to Ruhleben: Reichskanzlerplatz → Olympia-Stadion → Ruhleben" }, "opened": "1929-12-22", "segment": { "fromStopIndex": 24, "toStopIndex": 27 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260128013500/https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "22 December 1929: Extended to Ruhleben terminus \"on an embankment.\"", "tier": "secondary", "title": "U2 (Berlin U-Bahn) — Wikipedia (Neu-Westend 1922, Stadion 1913/1929, Ruhleben 22 Dec 1929)", "url": "https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613160913/https://en.wikipedia.org/wiki/History_of_the_Berlin_U-Bahn", "kind": "other", "publisher": "Wikipedia", "quote": "22 December 1929: Stadion – Ruhleben", "tier": "secondary", "title": "History of the Berlin U-Bahn — Wikipedia", "url": "https://en.wikipedia.org/wiki/History_of_the_Berlin_U-Bahn", "via": "https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)" } ], "stationCount": 3 }, { "confidence": "medium", "geometryRef": "berlin-U2", "id": "berlin-u2-1930-vinetastrasse", "kind": "extension", "label": { "en": "North to Pankow (Vinetastraße): Schönhauser Allee → Vinetastraße" }, "notes": "[Opening-date chase 2026-06-13] History of Berlin U-Bahn chronology gives 29 June 1930 for Nordring–Pankow (Vinetastraße); U2 article only says 'built in 1930'. Better-sourced specific date is 1930-06-29; consider correcting day/month.", "opened": "1930-07-29", "segment": { "fromStopIndex": 1, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260128013500/https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "1930: Vinetastraße station built to facilitate train reversals.", "tier": "secondary", "title": "U2 (Berlin U-Bahn) — Wikipedia (Vinetastraße opened 1930)", "url": "https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613160913/https://en.wikipedia.org/wiki/History_of_the_Berlin_U-Bahn", "kind": "other", "publisher": "Wikipedia", "quote": "29 June 1930: Nordring – Pankow (Vinetastraße)", "tier": "secondary", "title": "History of the Berlin U-Bahn — Wikipedia", "url": "https://en.wikipedia.org/wiki/History_of_the_Berlin_U-Bahn", "via": "https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": null, "id": "berlin-u2-1993-reunification", "kind": "reopening", "label": { "en": "Divided line reconnected after reunification: West (Ruhleben–Wittenbergplatz) + East (Vinetastraße–Mohrenstraße) through-service restored. Severed at the sector border 1961–1993; no new geometry." }, "opened": "1993-11-13", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260128013500/https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "Finally, after numerous renovations, conversions and demolitions, the two lines were reconnected on 13 November 1993.", "tier": "secondary", "title": "U2 (Berlin U-Bahn) — Wikipedia (reconnected 13 Nov 1993)", "url": "https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613160913/https://en.wikipedia.org/wiki/History_of_the_Berlin_U-Bahn", "kind": "other", "publisher": "Wikipedia", "quote": "The amalgamated line was reopened on 13 November 1993.", "tier": "secondary", "title": "History of the Berlin U-Bahn — Wikipedia", "url": "https://en.wikipedia.org/wiki/History_of_the_Berlin_U-Bahn", "via": "https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)" } ], "stationCount": 0 }, { "confidence": "medium", "geometryRef": "berlin-U2", "id": "berlin-u2-1998-mendelssohn", "kind": "extension", "label": { "en": "Mendelssohn-Bartholdy-Park station inserted (Gleisdreieck–Potsdamer Platz)" }, "notes": "[Opening-date chase 2026-06-13] History article notes engineering completion 2 Oct 1998; public opening date is 1 Oct 1998 per the U2 article.", "opened": "1998-10-01", "segment": { "fromStopIndex": 14, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260128013500/https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "A station with the provisional name of Hafenplatz was built by the BVG with two side platforms and opened as Mendelssohn-Bartholdy-Park station on 1 October 1998.", "tier": "secondary", "title": "U2 (Berlin U-Bahn) — Wikipedia (Mendelssohn-Bartholdy-Park opened 1 Oct 1998)", "url": "https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613160913/https://en.wikipedia.org/wiki/History_of_the_Berlin_U-Bahn", "kind": "other", "publisher": "Wikipedia", "quote": "The U2 Mendelssohn-Bartholdy-Park station opened in October 1998, and a short portion from Vinetastraße to Pankow opened in September 2000.", "tier": "secondary", "title": "History of the Berlin U-Bahn — Wikipedia", "url": "https://en.wikipedia.org/wiki/History_of_the_Berlin_U-Bahn", "via": "https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)" } ], "stationCount": 1 }, { "confidence": "medium", "constructionStart": "1997", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "DEM", "isEstimate": true, "value": 105000000, "year": 2000 }, "notes": "The 0.9 km extension from Vinetastraße to the Pankow S-Bahn interchange cost ≈ 105 million Deutsche Mark (≈ €54m at the fixed 1.95583 DM/€ conversion). Opened 16 Sep 2000. Recorded in native Deutsche Mark (≈ €54M). [Citation chase 2026-06-11] The DM 105 million figure is the actual final cost (outturn); the original estimate/budget was DM 126 million, so the project came in roughly 17% under budget. The federal government covered about three-quarters of the cost. Confirmed by the BVG and the Berlin Senate via Berliner Zeitung (13 Sep 2000), with Wikipedia secondary.", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260128013500/https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)", "kind": "wikipedia", "title": "U2 (Berlin U-Bahn) — Wikipedia (Pankow extension ≈105M DM, opened 16 Sep 2000)", "url": "https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20260613161030/https://www.berliner-zeitung.de/category/archiv", "kind": "news", "publisher": "Berliner Zeitung", "quote": "\"Wir gehen davon aus, dass die Baukosten mindestens zehn Prozent unter den veranschlagten 126 Millionen Mark liegen\", sagte ein Mitarbeiter der Senatsverwaltung für Stadtentwicklung zur \"Berliner Zeitung\". Nach Angaben der Berliner Verkehrsbetriebe (BVG) wird die Strecke sogar nur 105 Millionen Mark kosten.", "tier": "primary", "title": "Am Sonnabend sind die Pankower am Zug", "url": "https://web.archive.org/web/20150924053647/http://www.berliner-zeitung.de/archiv/endspurt-auf-der-baustelle--die-strecke-von-vinetastrasse-nach-bahnhof-pankow-wird-puenktlich-fertig---und-billiger-u-bahn-linie-2--ab-sonnabend-sind-die-pankower-am-zug,10810590,9833154.html", "via": "https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)" } ] }, "geometryRef": "berlin-U2", "id": "berlin-u2-2000-pankow", "kind": "extension", "label": { "en": "North terminus to Pankow S-Bahn: Vinetastraße → Pankow" }, "notes": "[Date chase 2026-06-12] Ceremonial Spatenstich 13 June 1997 (Bausenator Peter Klemann); actual construction of the missing tunnel segment and Pankow station began May 1997 per berliner-untergrundbahn.de. Earlier excavation work dated to 1989 (EN History article), but construction proper is 1997. [Opening-date chase 2026-06-13] Archived Berliner Zeitung URL was inaccessible; de.Wikipedia Bahnhof Berlin-Pankow corroborates 16 Sep 2000 directly.", "opened": "2000-09-16", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260128013500/https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "16 September 2000: \"the new line was opened\" to Pankow S-Bahn station. Cost: \"DM 105 million\" (down from \"DM 126 million\" estimate).", "tier": "secondary", "title": "U2 (Berlin U-Bahn) — Wikipedia (Pankow opened 16 Sep 2000)", "url": "https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260112081617/https://de.wikipedia.org/wiki/Bahnhof_Berlin-Pankow", "kind": "other", "publisher": "Wikipedia (Deutsch)", "quote": "Die Bauarbeiten begannen 1997. Für den Bau der 1,5 Kilometer langen Tunnelstrecke wurden drei Jahre benötigt, parallel dazu wurde der U-Bahnhof Pankow errichtet. Der neue Endbahnhof der Linie U2 wurde am 16. September 2000 eröffnet.", "tier": "secondary", "title": "Bahnhof Berlin-Pankow — Wikipedia (Deutsch)", "url": "https://de.wikipedia.org/wiki/Bahnhof_Berlin-Pankow", "via": "https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20170120121643/http://www.berliner-untergrundbahn.de:80/st-201.htm", "kind": "other", "publisher": "berliner-untergrundbahn.de (Marcus Schomacker)", "quote": "Im Mai 1997 endlich begann der Bau des noch fehlenden Tunnelstücks und des Bahnhofs Pankow.", "tier": "tertiary", "title": "Berlins U-Bahnstrecken. U2 Die Pankower U-Bahn — berliner-untergrundbahn.de", "url": "http://www.berliner-untergrundbahn.de/st-201.htm", "via": "https://de.wikipedia.org/wiki/Bahnhof_Berlin-Pankow" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260613160913/https://en.wikipedia.org/wiki/History_of_the_Berlin_U-Bahn", "kind": "other", "publisher": "Wikipedia (English)", "quote": "The U2 was extended from Vinetastraße to Pankow; the connection opened on 16 September 2000. Excavation began in 1989, and construction began in 1997.", "tier": "secondary", "title": "History of the Berlin U-Bahn — Wikipedia", "url": "https://en.wikipedia.org/wiki/History_of_the_Berlin_U-Bahn", "via": "https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260128013500/https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)", "kind": "wikipedia", "tier": "secondary", "title": "U2 (Berlin U-Bahn) — Wikipedia", "url": "https://en.wikipedia.org/wiki/U2_(Berlin_U-Bahn)" } ] }, { "cityId": "berlin", "color": "#16683D", "displayNumber": "U3", "id": "berlin-line-U3", "name": { "de": "U3 — Dahlemer Linie / Wilmersdorf–Dahlem-Bahn", "en": "U3 (Krumme Lanke ↔ Warschauer Straße)" }, "phases": [ { "confidence": "medium", "constructionStart": "1910", "geometryRef": "berlin-U3", "id": "berlin-u3-1913-dahlem", "kind": "initial", "label": { "en": "Wilmersdorf–Dahlem railway: Wittenbergplatz → Thielplatz (Freie Universität)" }, "notes": "[Date chase 2026-06-12] A ceremonial groundbreaking (Grundsteinlegung) was held at Hohenzollernplatz on 5 October 1909, but actual construction works (Arbeiten) began in summer 1910 per both Wikipedia sources; the 1910 year stands. [Opening-date chase 2026-06-13] berliner-untergrundbahn.de distinguishes a ceremonial inauguration (Einweihungsfest) on 9 Oct 1913 from the public/revenue-service opening on 12 Oct 1913; the curated date is the revenue-service date.", "opened": "1913-10-12", "segment": { "fromStopIndex": 3, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251112193248/https://en.wikipedia.org/wiki/U3_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "The lines to Thielplatz and to Uhlandstrasse both opened on 12 October 1913. Together they were about 10 kilometres (6.2 mi) long.", "tier": "secondary", "title": "U3 (Berlin U-Bahn) — Wikipedia (Wittenbergplatz–Thielplatz opened 12 Oct 1913)", "url": "https://en.wikipedia.org/wiki/U3_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260613161038/https://de.wikipedia.org/wiki/Geschichte_der_Berliner_U-Bahn", "kind": "other", "publisher": "Wikipedia (German)", "quote": "Im Sommer 1910 begannen die Arbeiten.", "tier": "tertiary", "title": "Geschichte der Berliner U-Bahn — Wikipedia (de)", "url": "https://de.wikipedia.org/wiki/Geschichte_der_Berliner_U-Bahn", "via": "https://en.wikipedia.org/wiki/U3_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20161015070709/http://www.berliner-untergrundbahn.de:80/st-113.htm", "kind": "other", "publisher": "berliner-untergrundbahn.de (fan/enthusiast site)", "quote": "Am 5. Oktober 1909 erfolgte eben dort die feierliche Grundsteinlegung, wonach der Bau auf gesamter Länge begonnen werden konnte.", "tier": "tertiary", "title": "Die Wilmersdorfer Untergrundbahn — Berliner Untergrundbahn", "url": "http://www.berliner-untergrundbahn.de/st-113.htm", "via": "https://en.wikipedia.org/wiki/U3_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260310162403/https://de.wikipedia.org/wiki/U-Bahn-Linie_U3_(Berlin)", "kind": "other", "publisher": "Wikipedia (Deutsch)", "quote": "Beide Strecken, sowohl die zum Thielplatz als auch die zur Uhlandstraße, wurden am 12. Oktober 1913 eröffnet.", "tier": "secondary", "title": "U-Bahn-Linie U3 (Berlin) — Wikipedia (Deutsch)", "url": "https://de.wikipedia.org/wiki/U-Bahn-Linie_U3_(Berlin)", "via": "https://en.wikipedia.org/wiki/U3_(Berlin_U-Bahn)" } ], "stationCount": 10 }, { "confidence": "medium", "geometryRef": "berlin-U3", "id": "berlin-u3-1929-krummelanke", "kind": "extension", "label": { "en": "South extension: Thielplatz → Krumme Lanke (land/cost gifted by the Sommerfeld estate)" }, "opened": "1929-12-22", "segment": { "fromStopIndex": 0, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251112193248/https://en.wikipedia.org/wiki/U3_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "the extension to Krumme Lanke via Onkel Toms Hütte and Oskar-Helene-Heim was completed on 22 December 1929", "tier": "secondary", "title": "U3 (Berlin U-Bahn) — Wikipedia (Thielplatz–Krumme Lanke opened 22 Dec 1929)", "url": "https://en.wikipedia.org/wiki/U3_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260310162403/https://de.wikipedia.org/wiki/U-Bahn-Linie_U3_(Berlin)", "kind": "other", "publisher": "Wikipedia (Deutsch)", "quote": "Dieser Abschnitt ging am 22. Dezember 1929 in Betrieb.", "tier": "secondary", "title": "U-Bahn-Linie U3 (Berlin) — Wikipedia (Deutsch)", "url": "https://de.wikipedia.org/wiki/U-Bahn-Linie_U3_(Berlin)", "via": "https://en.wikipedia.org/wiki/U3_(Berlin_U-Bahn)" } ], "stationCount": 3 }, { "confidence": "high", "geometryRef": "berlin-U3", "id": "berlin-u3-2018-warschauer", "kind": "extension", "label": { "en": "U3 service extended over the historic Stammstrecke to Warschauer Straße (track shared with U1; tunnel/viaduct cost carried on U1)" }, "notes": "[Opening-date chase 2026-06-13] Operational service extension over existing U1 infrastructure (no new track); curated date is the first day the U3 designation ran to Warschauer Strasse. Tagesspiegel (7 Mar 2018) is forward-looking ('voraussichtlich').", "opened": "2018-05-07", "segment": { "fromStopIndex": 13, "toStopIndex": 23 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251112193248/https://en.wikipedia.org/wiki/U3_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "the U3 was extended to run with the U1 all the way to Warschauer Straße. The extension ... was facilitated by ... BVG Class IK ... sets becoming available in April 2018.", "tier": "secondary", "title": "U3 (Berlin U-Bahn) — Wikipedia (extended to Warschauer Straße 7 May 2018)", "url": "https://en.wikipedia.org/wiki/U3_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260310162403/https://de.wikipedia.org/wiki/U-Bahn-Linie_U3_(Berlin)", "kind": "other", "publisher": "Wikipedia (Deutsch)", "quote": "Seit dem 7. Mai 2018 fährt die U3 über die Hochbahn durch Kreuzberg bis zur Station Warschauer Straße.", "tier": "secondary", "title": "U-Bahn-Linie U3 (Berlin) — Wikipedia (Deutsch)", "url": "https://de.wikipedia.org/wiki/U-Bahn-Linie_U3_(Berlin)", "via": "https://en.wikipedia.org/wiki/U3_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20220311131945/https://www.tagesspiegel.de/berlin/nahverkehr-in-berlin-u3-faehrt-ab-mai-von-dahlem-bis-zur-warschauer-strasse/21045262.html", "kind": "news", "publisher": "Der Tagesspiegel", "quote": "Voraussichtlich ab 7. Mai [erhöht die BVG] den Takt auf der Hochbahn zwischen der westlichen City, Kreuzberg und Friedrichshain", "tier": "secondary", "title": "U3 fährt ab Mai von Dahlem bis zur Warschauer Straße — Der Tagesspiegel", "url": "https://www.tagesspiegel.de/berlin/nahverkehr-in-berlin-u3-faehrt-ab-mai-von-dahlem-bis-zur-Warschauer-strasse/21045262.html", "via": "https://en.wikipedia.org/wiki/U3_(Berlin_U-Bahn)" } ], "stationCount": 10 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251112193248/https://en.wikipedia.org/wiki/U3_(Berlin_U-Bahn)", "kind": "wikipedia", "tier": "secondary", "title": "U3 (Berlin U-Bahn) — Wikipedia", "url": "https://en.wikipedia.org/wiki/U3_(Berlin_U-Bahn)" } ] }, { "cityId": "berlin", "color": "#F0D722", "displayNumber": "U4", "id": "berlin-line-U4", "name": { "de": "U4 — Schöneberger Linie", "en": "U4 (Nollendorfplatz ↔ Innsbrucker Platz)" }, "phases": [ { "confidence": "medium", "constructionStart": "1908", "geometryRef": "berlin-U4", "id": "berlin-u4-1910", "kind": "initial", "label": { "en": "Schöneberg's own line opens: Nollendorfplatz ↔ Innsbrucker Platz (whole line)" }, "notes": "Built in the Goldmark/Reichsmark era. The workflow found a ~13.9 million Goldmark figure for this 1910 Wilmersdorf–Dahlem (Kurfürstendamm) construction, but Goldmark→2026€ conversion across two world wars and hyperinflation is unreliable, so no cost is charted. [Date chase 2026-06-12] Groundbreaking ceremony 8 December 1908; Schöneberg built the line itself. German Wikipedia U4 article does not exist; other fan/operator sites (berliner-linienchronik.de, stadtschnellbahn-berlin.de, bvg.de, etc.) were inaccessible. No new citable source could be chained from the Wikipedia construction-start sentences (no inline citations attached). [Opening-date chase 2026-06-13] Opening ceremonies were subdued (the mayor had died a month earlier), but 1 Dec 1910 is the public revenue-service opening with no separate ceremonial date.", "opened": "1910-12-01", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260317152411/https://en.wikipedia.org/wiki/U4_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "A groundbreaking ceremony was held on 8 December 1908. ... on 1 December 1910, the line was put into operation ... the line was opened on 1 December 1910 as Line BI.", "tier": "secondary", "title": "U4 (Berlin U-Bahn) — Wikipedia (opened 1 Dec 1910)", "url": "https://en.wikipedia.org/wiki/U4_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613161127/https://de.wikipedia.org/wiki/U-Bahn-Linie_U4_(Berlin)", "kind": "other", "publisher": "Wikipedia (German)", "quote": "Nach bereits zwei Jahren Bauzeit konnte die Strecke am 1. Dezember 1910 eröffnet werden.", "tier": "secondary", "title": "U-Bahn-Linie U4 (Berlin) — Wikipedia (Deutsch)", "url": "https://de.wikipedia.org/wiki/U-Bahn-Linie_U4_(Berlin)", "via": "https://en.wikipedia.org/wiki/U4_(Berlin_U-Bahn)" } ], "stationCount": 5 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260317152411/https://en.wikipedia.org/wiki/U4_(Berlin_U-Bahn)", "kind": "wikipedia", "tier": "secondary", "title": "U4 (Berlin U-Bahn) — Wikipedia", "url": "https://en.wikipedia.org/wiki/U4_(Berlin_U-Bahn)" } ] }, { "cityId": "berlin", "color": "#7E5330", "displayNumber": "U5", "id": "berlin-line-U5", "name": { "de": "U5 — Linie E / Lückenschluss", "en": "U5 (Hauptbahnhof ↔ Hönow)" }, "phases": [ { "confidence": "high", "constructionStart": "1927", "geometryRef": "berlin-U5", "id": "berlin-u5-1930-linie-e", "kind": "initial", "label": { "en": "Linie E opens: Alexanderplatz → Friedrichsfelde" }, "notes": "Built in the Goldmark/Reichsmark era. No reliable, natively-sourced construction cost was found; the prior euro figure was era-mislabeled (the period used Goldmark/Reichsmark) and is not reliably convertible to 2026€, so no cost is recorded. [Date chase 2026-06-12] Construction start of 1927 is corroborated by a primary source: the 1930 Linie E opening booklet (u-bahn-archiv.de), which states Rohbauarbeiten (shell construction) began 'im Jahre 1927'. [Opening-date chase 2026-06-13] Primary source u-bahn-archiv.de has a TLS/dead-link error but its document title names 21 December 1930 and DE Wikipedia cites it for that date.", "opened": "1930-12-21", "segment": { "fromStopIndex": 6, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260611112518/https://en.wikipedia.org/wiki/U5_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "Construction began in May 1927 for the seven-kilometer route from Alexanderplatz to Friedrichsfelde, with the opening taking place on 21 December 1930. Originally designated as Line E.", "tier": "secondary", "title": "U5 (Berlin U-Bahn) — Wikipedia (opened 21 Dec 1930)", "url": "https://en.wikipedia.org/wiki/U5_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260104121437/https://de.wikipedia.org/wiki/U-Bahn-Linie_U5_(Berlin)", "kind": "other", "publisher": "Wikipedia", "quote": "Die Bauarbeiten erfolgten in offener Bauweise zwischen den Jahren 1927 und 1930.", "tier": "secondary", "title": "U-Bahn-Linie U5 (Berlin) — Wikipedia (de)", "url": "https://de.wikipedia.org/wiki/U-Bahn-Linie_U5_(Berlin)", "via": "https://en.wikipedia.org/wiki/U5_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260613161020/https://www.u-bahn-archiv.de/dokumente/1930_E_eroeffnung.html", "kind": "primary", "publisher": "U-Bahn-Archiv (Hochbahngesellschaft / Nord-Süd-Bahn, 1930 original)", "quote": "Hier wurde mit den Rohbauarbeiten im Jahre 1927 begonnen, und erst Anfang 1931, nach der Betriebseröffnung, wird der letzte Rest der Arbeiten abgeschlossen sein.", "tier": "primary", "title": "Zur Eröffnung der Untergrundbahn vom Alexanderplatz durch die Frankfurter Allee nach Friedrichsfelde (Linie E) am 21. Dezember 1930", "url": "http://www.u-bahn-archiv.de/dokumente/1930_E_eroeffnung.html", "via": "https://en.wikipedia.org/wiki/U5_(Berlin_U-Bahn)" } ], "stationCount": 9 }, { "confidence": "low", "geometryRef": "berlin-U5", "id": "berlin-u5-1973-tierpark", "kind": "extension", "label": { "en": "East extension: Friedrichsfelde → Tierpark (East Berlin / BVB)" }, "notes": "[Opening-date chase 2026-06-13] DE Wikipedia uses 'Einweihung' (inauguration); no ceremony-vs-revenue gap found. Underlying source is offline book Bock (2003) p.66.", "opened": "1973-06-25", "segment": { "fromStopIndex": 15, "toStopIndex": 16 }, "sources": [ { "accessedAt": "2026-06-06", "archivedUrl": "https://web.archive.org/web/20260104121437/https://de.wikipedia.org/wiki/U-Bahn-Linie_U5_(Berlin)", "kind": "wikipedia", "quote": "Die Einweihung der Verlängerung vom U-Bahnhof Friedrichsfelde bis zum U-Bahnhof Tierpark fand am 25. Juni 1973 statt.", "tier": "secondary", "title": "U-Bahn-Linie U5 (Berlin) – Wikipedia", "url": "https://de.wikipedia.org/wiki/U-Bahn-Linie_U5_(Berlin)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260611112518/https://en.wikipedia.org/wiki/U5_(Berlin_U-Bahn)", "kind": "wikipedia", "title": "U5 (Berlin U-Bahn) — Wikipedia (Friedrichsfelde–Tierpark opened 25 Jun 1973)", "url": "https://en.wikipedia.org/wiki/U5_(Berlin_U-Bahn)" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "berlin-U5", "id": "berlin-u5-1988-elsterwerdaer", "kind": "extension", "label": { "en": "Hönow extension stage 1: Tierpark → Elsterwerdaer Platz (via Wuhletal)" }, "notes": "[Opening-date chase 2026-06-13] DE text notes the opening ceremony (brass band, party officials) coincided with revenue-service start; no gap. Underlying source is offline book (Heimatverein Marzahn-Hellersdorf, 2013).", "opened": "1988-06-30", "segment": { "fromStopIndex": 16, "toStopIndex": 18 }, "sources": [ { "accessedAt": "2026-06-06", "archivedUrl": "https://web.archive.org/web/20260104121437/https://de.wikipedia.org/wiki/U-Bahn-Linie_U5_(Berlin)", "kind": "wikipedia", "quote": "wurde der Streckenabschnitt zwischen U-Bahnhof Tierpark und U-Bahnhof Elsterwerdaer Platz am 30. Juni 1988 eröffnet. ... Official start March 1, 1985", "tier": "secondary", "title": "U-Bahn-Linie U5 (Berlin) – Wikipedia", "url": "https://de.wikipedia.org/wiki/U-Bahn-Linie_U5_(Berlin)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260611112518/https://en.wikipedia.org/wiki/U5_(Berlin_U-Bahn)", "kind": "wikipedia", "title": "U5 (Berlin U-Bahn) — Wikipedia (Tierpark–Elsterwerdaer Platz opened 30 Jun 1988)", "url": "https://en.wikipedia.org/wiki/U5_(Berlin_U-Bahn)" } ], "stationCount": 2 }, { "confidence": "low", "geometryRef": "berlin-U5", "id": "berlin-u5-1989-honow", "kind": "extension", "label": { "en": "Hönow extension stage 2: Elsterwerdaer Platz → Hönow (serving Marzahn/Hellersdorf, last GDR metro project)" }, "notes": "[Opening-date chase 2026-06-13] DE Wikipedia adds detail beyond the curated EN source (chased via != ''); ceremony at Tierpark with Günter Schabowski, coinciding with service start. Underlying source is offline book (Heimatverein Marzahn-Hellersdorf, 2013).", "opened": "1989-06-30", "segment": { "fromStopIndex": 18, "toStopIndex": 24 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260611112518/https://en.wikipedia.org/wiki/U5_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "Elsterwerdaer Platz to Hönow ... 6 stations (Wuhletal, Kaulsdorf-Nord, Kienberg, Cottbusser Platz, Hellersdorf, Louis-Lewin-Straße). A total of 30 kilometres of assembled track was built for the 10.1-kilometre route.", "tier": "secondary", "title": "U5 (Berlin U-Bahn) — Wikipedia (Elsterwerdaer Platz–Hönow opened 30 Jun 1989)", "url": "https://en.wikipedia.org/wiki/U5_(Berlin_U-Bahn)" } ], "stationCount": 6 }, { "confidence": "high", "constructionStart": "1995", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "EUR", "isEstimate": true, "value": 320000000, "year": 2009 }, "notes": "The 1.8 km, 3-station stub (Hauptbahnhof–Bundestag–Brandenburger Tor) opened 8 Aug 2009 as a separate, disconnected shuttle branded 'U55' (single train, no connection to the rest of the network). Cost ≈ €320 million; work was suspended 2001–2004 over funding and finished after ≈13 years. Per scope this stub is folded into the U5 history rather than modelled as a separate line — it became the western end of the through U5 in Dec 2020. [Citation chase 2026-06-11] The €320M figure is the total cost reported at the U55's August 2009 opening (Railway Gazette; Tagesspiegel 2009-08-05), i.e. an outturn rather than an estimate; a contemporaneous Die Welt report citing €250M reflects a narrower/partial spend figure, not the final total.", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251207030155/https://www.railwaygazette.com/berlin-u55-metro-line-opens/34293.article", "kind": "news", "title": "Berlin U55 metro line opens — Railway Gazette International (1.8 km, 3 stations, €320m)", "url": "https://www.railwaygazette.com/berlin-u55-metro-line-opens/34293.article" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260201052052/https://en.wikipedia.org/wiki/U55_(Berlin_U-Bahn)", "kind": "wikipedia", "title": "U55 (Berlin U-Bahn) — Wikipedia (opened 8 Aug 2009; merged into U5 in 2020)", "url": "https://en.wikipedia.org/wiki/U55_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20250124213016/https://www.tagesspiegel.de/berlin/der-lange-weg-zur-kurzen-u-bahn-1776937.html", "kind": "news", "publisher": "Der Tagesspiegel", "quote": "Der Bau der Stummel-U-Bahn U 55 wird zu diesem Zeitpunkt rund 320 Millionen Euro gekostet haben.", "tier": "secondary", "title": "Der lange Weg zur kurzen U-Bahn — Der Tagesspiegel", "url": "https://www.tagesspiegel.de/berlin/der-lange-weg-zur-kurzen-u-bahn-1776937.html", "via": "https://de.wikipedia.org/wiki/U-Bahn-Linie_U55_(Berlin)" } ] }, "geometryRef": "berlin-U5", "id": "berlin-u5-2009-u55", "kind": "extension", "label": { "en": "U55 stub opens: Hauptbahnhof → Bundestag → Brandenburger Tor (isolated shuttle)" }, "notes": "[Date chase 2026-06-12] The English Wikipedia's 'January 2000' is a western-end construction resumption, not the project start. German Wikipedia ('Im Jahr 1995 wurde mit dem Bau begonnen') and Die Welt ('den 1995 begonnenen Bau') confirm the overall 1995 start, consistent with the 2001 Senate stoppage and 2002 resumption. [Opening-date chase 2026-06-13] BVG primary source is a dead link but archived October 2009 confirming the line was in operation; Die Welt article (blocked) is dated 7 Aug 2009 and supports the 1995 construction-start claim only, not the opening date.", "opened": "2009-08-08", "segment": { "fromStopIndex": 0, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260201052052/https://en.wikipedia.org/wiki/U55_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "It was finally opened on 8 August 2009. ... On 19 January 2000, construction began on the western end of this extension. ... It had only three stations [Hauptbahnhof, Bundestag, Brandenburger Tor]. ... 1.4 km", "tier": "secondary", "title": "U55 (Berlin U-Bahn) — Wikipedia (Hauptbahnhof–Brandenburger Tor opened 8 Aug 2009)", "url": "https://en.wikipedia.org/wiki/U55_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260113024429/https://de.wikipedia.org/wiki/U-Bahn-Linie_U55_(Berlin)", "kind": "other", "publisher": "Wikipedia", "quote": "Im Jahr 1995 wurde mit dem Bau begonnen.", "tier": "secondary", "title": "U-Bahn-Linie U55 (Berlin) — Wikipedia (de)", "url": "https://de.wikipedia.org/wiki/U-Bahn-Linie_U55_(Berlin)", "via": "https://en.wikipedia.org/wiki/U55_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260104121437/https://de.wikipedia.org/wiki/U-Bahn-Linie_U5_(Berlin)", "kind": "other", "publisher": "Wikipedia", "quote": "Die erste Stufe zwischen Brandenburger Tor und Hauptbahnhof, Baubeginn war 1995", "tier": "secondary", "title": "U-Bahn-Linie U5 (Berlin) — Wikipedia (de)", "url": "https://de.wikipedia.org/wiki/U-Bahn-Linie_U5_(Berlin)", "via": "https://en.wikipedia.org/wiki/U5_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20250124213500/https://www.welt.de/vermischtes/article4278238/Kanzler-Linie-Stummel-U-Bahn-fuer-250-Millionen.html", "kind": "news", "publisher": "Die Welt", "quote": "den 1995 begonnenen Bau einer U-Bahn vom Hauptbahnhof bis zum Alexanderplatz zu stoppen", "tier": "secondary", "title": "Kanzler-Linie – Stummel-U-Bahn für 250 Millionen", "url": "https://www.welt.de/vermischtes/article4278238/Kanzler-Linie-Stummel-U-Bahn-fuer-250-Millionen.html", "via": "https://de.wikipedia.org/wiki/U-Bahn-Linie_U5_(Berlin)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20140723203658/http://www.bvg.de/index.php/de/470021/name/U-Bahnlinie+U55.html", "kind": "primary", "publisher": "Berliner Verkehrsbetriebe (BVG)", "quote": "[Cited in en.Wikipedia U55 infobox as the primary source for open date 8 August 2009; archived at https://web.archive.org/web/20091012044007/http://www.bvg.de/index.php/de/470021/name/U-Bahnlinie+U55.html as of 12 October 2009, confirming the line was already in operation by that date.]", "tier": "primary", "title": "U-Bahnlinie U55 — Berliner Verkehrsbetriebe (BVG)", "url": "http://www.bvg.de/index.php/de/470021/name/U-Bahnlinie%2BU55.html", "via": "https://en.wikipedia.org/wiki/U55_(Berlin_U-Bahn)" } ], "stationCount": 3 }, { "confidence": "high", "constructionStart": "2010", "cost": { "basis": "budget", "confidence": "medium", "nominal": { "currency": "EUR", "isEstimate": true, "value": 525000000, "year": 2013 }, "notes": "The 2.2 km gap-closure tunnel with three new stations (Unter den Linden, Museumsinsel, Rotes Rathaus) opened 4 Dec 2020, joining the 2009 U55 stub to the historic U5 at Alexanderplatz to create a continuous Hauptbahnhof–Hönow line. Federal + state funding was capped at €525 million; BVG later cited actual costs of €530–540 million against an original ≈€433m estimate. Firm, well-documented figure. U5 Lückenschluss (gap closure) project cost, ~2013 price level. [Citation chase 2026-06-11] Urban Transport Magazine attributes the €525m to a 2013 calculation and states final costs exceeded it \"by only a few percent,\" consistent with the €530–540m actual; BauNetz reports \"gut 525 Millionen Euro\" inclusive of all three stations. The €525m is best read as the 2013 federal+state budget cap, with the true outturn slightly higher.", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260217204143/https://www.urban-transport-magazine.com/en/bvg-berlin-inaugurate-u5-metro-extension-in-city-centre/", "kind": "news", "title": "BVG Berlin inaugurates U5 metro extension in city centre — Urban Transport Magazine (2.2 km, 3 stations, ≈€525m)", "url": "https://www.urban-transport-magazine.com/en/bvg-berlin-inaugurate-u5-metro-extension-in-city-centre/" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20241123174605/https://www.baunetz.de/meldungen/Meldungen-U-Bahn-Linie_5_in_Berlin_eroeffnet_7493216.html", "kind": "news", "title": "U-Bahn-Linie 5 in Berlin eröffnet / Lückenschluss — BauNetz (€525m, opened 4 Dec 2020)", "url": "https://www.baunetz.de/meldungen/Meldungen-U-Bahn-Linie_5_in_Berlin_eroeffnet_7493216.html" } ] }, "geometryRef": "berlin-U5", "id": "berlin-u5-2020-luckenschluss", "kind": "extension", "label": { "en": "Lückenschluss: Brandenburger Tor → Alexanderplatz (Unter den Linden, Museumsinsel, Rotes Rathaus) — U55 merged into U5" }, "notes": "[Date chase 2026-06-12] German Wikipedia notes preparatory works began in 2009, with the formal first Spatenstich for the 2.2 km Lueckenschluss on 13 April 2010 (cited to B.Z. Berlin). The curated year 2010 reflects the formal groundbreaking. The B.Z. Berlin live URL is blocked; an archived copy exists at web.archive.org/web/20250221022449. [Opening-date chase 2026-06-13] Tagesspiegel (4 Dec 2020) confirms revenue service from midday that Friday. Museumsinsel station on the segment did not open until 9 July 2021; trains initially passed through without stopping.", "opened": "2020-12-04", "segment": { "fromStopIndex": 3, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-06-06", "archivedUrl": "https://web.archive.org/web/20260201052052/https://en.wikipedia.org/wiki/U55_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "Operations on the line ceased on 17 March 2020, until its incorporation into the new U5 line on 4 December of that year.", "tier": "secondary", "title": "U55 (Berlin U-Bahn) – Wikipedia", "url": "https://en.wikipedia.org/wiki/U55_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260611112518/https://en.wikipedia.org/wiki/U5_(Berlin_U-Bahn)", "kind": "wikipedia", "title": "U5 (Berlin U-Bahn) — Wikipedia (Lückenschluss opened 4 Dec 2020)", "url": "https://en.wikipedia.org/wiki/U5_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260104121437/https://de.wikipedia.org/wiki/U-Bahn-Linie_U5_(Berlin)", "kind": "other", "publisher": "Wikipedia", "quote": "Im Jahr 2009 begannen die Arbeiten für den zweiten (dazwischenliegenden) Abschnitt vom Alexanderplatz bis zum Brandenburger Tor. Der symbolische erste Spatenstich für diese 2,2 km lange Teilstrecke erfolgte am 13. April 2010.", "tier": "secondary", "title": "U-Bahn-Linie U5 (Berlin) — Wikipedia (de)", "url": "https://de.wikipedia.org/wiki/U-Bahn-Linie_U5_(Berlin)", "via": "https://en.wikipedia.org/wiki/U5_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613161121/https://www.tagesspiegel.de/berlin/berlin-hat-eine-grosse-lucke-geschlossen-5090074.html", "kind": "news", "publisher": "Der Tagesspiegel (Jörn Hasselmann)", "quote": "Seit Freitagmittag fahren die Züge der U-Bahn-Linie 5 von Hönow bis zum Berliner Hauptbahnhof. [Since Friday midday, U5 trains run from Hönow to Berlin Hauptbahnhof — article dated 4 December 2020]", "tier": "secondary", "title": "Die neue U5 ist eröffnet – Berlin hat eine große Lücke geschlossen — Der Tagesspiegel", "url": "https://www.tagesspiegel.de/berlin/die-neue-u5-ist-eroeffnet-berlin-hat-eine-grosse-luecke-geschlossen/26686576.html", "via": "https://de.wikipedia.org/wiki/U-Bahn-Linie_U5_(Berlin)" } ], "stationCount": 3 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260611112518/https://en.wikipedia.org/wiki/U5_(Berlin_U-Bahn)", "kind": "wikipedia", "tier": "secondary", "title": "U5 (Berlin U-Bahn) — Wikipedia", "url": "https://en.wikipedia.org/wiki/U5_(Berlin_U-Bahn)" } ] }, { "cityId": "berlin", "color": "#8C6DAB", "displayNumber": "U6", "id": "berlin-line-U6", "name": { "de": "U6 — Nord-Süd-Bahn (Linie C)", "en": "U6 (Alt-Tegel ↔ Alt-Mariendorf)" }, "phases": [ { "confidence": "medium", "constructionStart": "1912", "geometryRef": "berlin-U6", "id": "berlin-u6-1923-nordsuedbahn", "kind": "initial", "label": { "en": "Nord-Süd-Bahn opens: Hallesches Tor → Stettiner Bahnhof (Naturkundemuseum), extended to Seestraße" }, "notes": "Built in the Goldmark/Reichsmark era. No reliable, natively-sourced construction cost was found; the prior euro figure was era-mislabeled (the period used Goldmark/Reichsmark) and is not reliably convertible to 2026€, so no cost is recorded. [Date chase 2026-06-12] Construction of the Nord-Süd-Bahn began in December 1912 (berliner-untergrundbahn.de gives 2 December 1912). Note: the year claim appears in unreferenced/citation-needed sections of the Wikipedia articles; the ideal primary source (Friedrich Krause, 'Die städtische Nord-Südbahn in Berlin', Zentralblatt der Bauverwaltung 1923) was not available online. [Opening-date chase 2026-06-13] German Wikipedia's Eröffnungsdaten list separately records 8 March 1923 for the northward extension to Seestraße; the phase label correctly covers both with 30 Jan as the anchor.", "opened": "1923-01-30", "segment": { "fromStopIndex": 8, "toStopIndex": 19 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251216233520/https://en.wikipedia.org/wiki/U6_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "on 30 January 1923 the first tunnel section was opened between Hallesches Tor and Stettiner Bahnhof", "tier": "secondary", "title": "U6 (Berlin U-Bahn) — Wikipedia (Nord-Süd-Bahn opened 30 Jan 1923)", "url": "https://en.wikipedia.org/wiki/U6_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260613161127/https://de.wikipedia.org/wiki/U-Bahn-Linie_U6_(Berlin)", "kind": "other", "publisher": "Wikipedia (Deutsch)", "quote": "Die Bauarbeiten für die Nord-Süd-Linie von Wedding bis Tempelhof mit Abzweig nach Neukölln begannen im Jahr 1912 und wurden durch den Ersten Weltkrieg erschwert und kamen schließlich ganz zum Stillstand.", "tier": "tertiary", "title": "U-Bahn-Linie U6 (Berlin) — Wikipedia (Deutsch)", "url": "https://de.wikipedia.org/wiki/U-Bahn-Linie_U6_(Berlin)", "via": "https://en.wikipedia.org/wiki/U6_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260517153301/https://en.wikipedia.org/wiki/Berlin_U-Bahn", "kind": "other", "publisher": "Wikipedia (English)", "quote": "Construction of the Nord-Süd-Bahn ('North-South railway') connecting Wedding in the north to Tempelhof and Neukölln in the south had started in December 1912, but halted for the First World War.", "tier": "tertiary", "title": "Berlin U-Bahn — Wikipedia", "url": "https://en.wikipedia.org/wiki/Berlin_U-Bahn", "via": "https://en.wikipedia.org/wiki/U6_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260613161103/https://www.berliner-untergrundbahn.de/cu-10.html", "kind": "other", "publisher": "berliner-untergrundbahn.de (fan/enthusiast historical archive)", "quote": "2. Dezember 1912 — Die Stadt Berlin beginnt mit dem Bau der so genannten \"Nord-Süd-Bahn\" in der Chausseestraße. Die Nord-Süd-Bahn soll unter der Chaussee- und Friedrichstraße den Wedding mit dem Halleschen Tor verbinden.", "tier": "tertiary", "title": "Berliner Untergrundbahn — U-Bahn-Chronik 1910–1919", "url": "https://www.berliner-untergrundbahn.de/cu-10.html", "via": "https://de.wikipedia.org/wiki/U-Bahn-Linie_U6_(Berlin)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20241204075308/https://www.berliner-untergrundbahn.de/cu-20.html", "kind": "other", "publisher": "berliner-untergrundbahn.de", "quote": "January 30, 1923: First section opened between Hallesches Tor and Stettiner Bahnhof", "tier": "tertiary", "title": "Berliner Untergrundbahn — U-Bahn-Chronik 1920–1929", "url": "https://www.berliner-untergrundbahn.de/cu-20.html", "via": "https://en.wikipedia.org/wiki/U6_(Berlin_U-Bahn)" } ], "stationCount": 11 }, { "confidence": "medium", "geometryRef": "berlin-U6", "id": "berlin-u6-1929-tempelhof", "kind": "extension", "label": { "en": "South extension: Hallesches Tor → Platz der Luftbrücke → Tempelhof" }, "opened": "1929-12-22", "segment": { "fromStopIndex": 3, "toStopIndex": 8 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251216233520/https://en.wikipedia.org/wiki/U6_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "In 1929 the line was extended to intersect with the S-Bahn's Tempelhof station", "tier": "secondary", "title": "U6 (Berlin U-Bahn) — Wikipedia (south to Kreuzberg 1926, Tempelhof 1927/1929)", "url": "https://en.wikipedia.org/wiki/U6_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613161127/https://de.wikipedia.org/wiki/U-Bahn-Linie_U6_(Berlin)", "kind": "other", "publisher": "Wikipedia (de)", "quote": "22. Dezember 1929: Flughafen (heute: Paradestraße) – Tempelhof (Südring)", "tier": "secondary", "title": "U-Bahn-Linie U6 (Berlin) — Wikipedia (Deutsch), Eröffnungsdaten section", "url": "https://de.wikipedia.org/wiki/U-Bahn-Linie_U6_(Berlin)", "via": "https://en.wikipedia.org/wiki/U6_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20241204075308/https://www.berliner-untergrundbahn.de/cu-20.html", "kind": "other", "publisher": "berliner-untergrundbahn.de", "quote": "December 22, 1929: Final extension to 'Tempelhof (Südring)' completed", "tier": "tertiary", "title": "Berliner Untergrundbahn — U-Bahn-Chronik 1920–1929", "url": "https://www.berliner-untergrundbahn.de/cu-20.html", "via": "https://en.wikipedia.org/wiki/U6_(Berlin_U-Bahn)" } ], "stationCount": 5 }, { "confidence": "medium", "geometryRef": "berlin-U6", "id": "berlin-u6-1956-northwest", "kind": "extension", "label": { "en": "Northwest extension toward Tegel: Seestraße → Kurt-Schumacher-Platz (1956) → Alt-Tegel (1958). NOTE: the 1958 stub beyond Kurt-Schumacher-Platz (Scharnweberstraße, Otisstraße, Holzhauser Straße, Borsigwerke, Alt-Tegel) is absent from OpenStreetMap's U6 route=subway relation — neither track nor stop nodes are tagged there — so the modelled line terminates at Kurt-Schumacher-Platz. This is an upstream OSM data gap, not a fetch-bbox limit." }, "opened": "1956-05-03", "segment": { "fromStopIndex": 19, "toStopIndex": 23 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251216233520/https://en.wikipedia.org/wiki/U6_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "The first pile was driven on 26 October 1953 at Müllerstraße ... On 3 May 1956, Seestraße – Kurt-Schumacher-Platz opened", "tier": "secondary", "title": "U6 (Berlin U-Bahn) — Wikipedia (Seestraße–Kurt-Schumacher-Platz 3 May 1956; Alt-Tegel 31 May 1958)", "url": "https://en.wikipedia.org/wiki/U6_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613161127/https://de.wikipedia.org/wiki/U-Bahn-Linie_U6_(Berlin)", "kind": "other", "publisher": "Wikipedia (de)", "quote": "3. Mai 1956: Seestraße – Kurt-Schumacher-Platz; 31. Mai 1958: Kurt-Schumacher-Platz – Tegel (heute: Alt-Tegel)", "tier": "secondary", "title": "U-Bahn-Linie U6 (Berlin) — Wikipedia (Deutsch), Eröffnungsdaten section", "url": "https://de.wikipedia.org/wiki/U-Bahn-Linie_U6_(Berlin)", "via": "https://en.wikipedia.org/wiki/U6_(Berlin_U-Bahn)" } ], "stationCount": 2 }, { "confidence": "medium", "geometryRef": "berlin-U6", "id": "berlin-u6-1966-mariendorf", "kind": "extension", "label": { "en": "South terminus: Tempelhof → Alt-Mariendorf (line completed). Through the Cold War the U6 crossed East Berlin's Mitte with several sealed 'Geisterbahnhöfe' (ghost stations) 1961–1990; trains passed through without stopping." }, "opened": "1966-02-28", "segment": { "fromStopIndex": 0, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251216233520/https://en.wikipedia.org/wiki/U6_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "The first pile for the 3.5-kilometre route was driven on 6 March 1961 ... the Alt-Mariendorf terminus station was opened on 28 February 1966", "tier": "secondary", "title": "U6 (Berlin U-Bahn) — Wikipedia (Alt-Mariendorf opened 28 Feb 1966; ghost stations 1961–90)", "url": "https://en.wikipedia.org/wiki/U6_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613161127/https://de.wikipedia.org/wiki/U-Bahn-Linie_U6_(Berlin)", "kind": "other", "publisher": "Wikipedia (de)", "quote": "28. Februar 1966: Tempelhof (Südring) – Alt-Mariendorf", "tier": "secondary", "title": "U-Bahn-Linie U6 (Berlin) — Wikipedia (Deutsch), Eröffnungsdaten section", "url": "https://de.wikipedia.org/wiki/U-Bahn-Linie_U6_(Berlin)", "via": "https://en.wikipedia.org/wiki/U6_(Berlin_U-Bahn)" } ], "stationCount": 3 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251216233520/https://en.wikipedia.org/wiki/U6_(Berlin_U-Bahn)", "kind": "wikipedia", "tier": "secondary", "title": "U6 (Berlin U-Bahn) — Wikipedia", "url": "https://en.wikipedia.org/wiki/U6_(Berlin_U-Bahn)" } ] }, { "cityId": "berlin", "color": "#528DBA", "displayNumber": "U7", "id": "berlin-line-U7", "name": { "de": "U7 — längste U-Bahn-Linie Berlins", "en": "U7 (Rudow ↔ Rathaus Spandau)" }, "phases": [ { "confidence": "low", "constructionStart": "1920", "geometryRef": "berlin-U7", "id": "berlin-u7-1924-neukolln", "kind": "initial", "label": { "en": "Neukölln line (old Linie CII): Mehringdamm/Möckernbrücke ↔ Grenzallee via Hermannplatz, opened in stages 1924–1930. Became the nucleus of today's U7 when split from the north–south line at Mehringdamm in 1966." }, "notes": "[Date chase 2026-06-12] Construction-start year for the Neukölln branch is unconfirmed: secondary sources date the Nord-Süd-Bahn construction resumption to 1919 (the Neukölln arm was the first branch built), while a separate chronology cites 1921 for the Reichsstraße segment. No source gives an explicit branch-specific start year; the curated 1920 falls between these but is not directly attested. [Opening-date chase 2026-06-13] Correct opening date of the final Grenzallee extension is 21 December 1930 (curated ISO month 04 is a typo for 12). DE Wikipedia 'Eröffnungsdaten' list confirms '21. Dezember 1930: Karl-Marx-Straße – Grenzallee'; it opened the same day as the future U5 line in one of the largest U-Bahn opening celebrations.", "opened": "1930-04-21", "segment": { "fromStopIndex": 8, "toStopIndex": 17 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260511061420/https://en.wikipedia.org/wiki/U7_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "The final stage of the Neukölln branch at that time, the 1.5 kilometre-long extension to Grenzallee, was put into operation on 21 December 1930.", "tier": "secondary", "title": "U7 (Berlin U-Bahn) — Wikipedia (Neukölln line opened in stages 1924–1930)", "url": "https://en.wikipedia.org/wiki/U7_(Berlin_U-Bahn)" } ], "stationCount": 9 }, { "confidence": "low", "geometryRef": "berlin-U7", "id": "berlin-u7-1963-britz", "kind": "extension", "label": { "en": "South extension: Grenzallee → Britz-Süd" }, "opened": "1963-09-28", "segment": { "fromStopIndex": 5, "toStopIndex": 8 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260511061420/https://en.wikipedia.org/wiki/U7_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "Sixth Section: Grenzallee to Britz-Süd - Opening: 28 September 1963 - Construction start: 2 November 1959", "tier": "secondary", "title": "U7 (Berlin U-Bahn) — Wikipedia (Grenzallee–Britz-Süd opened 28 Sep 1963)", "url": "https://en.wikipedia.org/wiki/U7_(Berlin_U-Bahn)" } ], "stationCount": 3 }, { "confidence": "low", "geometryRef": "berlin-U7", "id": "berlin-u7-1972-rudow", "kind": "extension", "label": { "en": "South terminus: Britz-Süd → Zwickauer Damm (1970) → Rudow (1972)" }, "notes": "[Opening-date chase 2026-06-13] Intermediate Britz-Süd → Zwickauer Damm segment opened 2 January 1970; Zwickauer Damm → Rudow opened 1 July 1972 per both sources.", "opened": "1972-07-01", "segment": { "fromStopIndex": 0, "toStopIndex": 5 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260511061420/https://en.wikipedia.org/wiki/U7_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "Rudow received connection to Line 7 on 1 July 1972.", "tier": "secondary", "title": "U7 (Berlin U-Bahn) — Wikipedia (Zwickauer Damm 1970, Rudow 1 Jul 1972)", "url": "https://en.wikipedia.org/wiki/U7_(Berlin_U-Bahn)" } ], "stationCount": 5 }, { "confidence": "low", "geometryRef": "berlin-U7", "id": "berlin-u7-1971-fehrbelliner", "kind": "extension", "label": { "en": "West extension: Möckernbrücke → Fehrbelliner Platz" }, "opened": "1971-01-29", "segment": { "fromStopIndex": 17, "toStopIndex": 23 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260511061420/https://en.wikipedia.org/wiki/U7_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "The construction of the track from Möckernbrücke to Fehrbelliner Platz started on 1 July 1962, and finished on 29 January 1971.", "tier": "secondary", "title": "U7 (Berlin U-Bahn) — Wikipedia (Möckernbrücke–Fehrbelliner Platz opened 29 Jan 1971)", "url": "https://en.wikipedia.org/wiki/U7_(Berlin_U-Bahn)" } ], "stationCount": 7 }, { "confidence": "low", "geometryRef": "berlin-U7", "id": "berlin-u7-1978-richardwagner", "kind": "extension", "label": { "en": "West extension: Fehrbelliner Platz → Richard-Wagner-Platz" }, "opened": "1978-04-28", "segment": { "fromStopIndex": 23, "toStopIndex": 28 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260511061420/https://en.wikipedia.org/wiki/U7_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "The stage from Fehrbelliner Platz to Richard-Wagner-Platz was put into operation on 28 April 1978.", "tier": "secondary", "title": "U7 (Berlin U-Bahn) — Wikipedia (Fehrbelliner Platz–Richard-Wagner-Platz opened 28 Apr 1978)", "url": "https://en.wikipedia.org/wiki/U7_(Berlin_U-Bahn)" } ], "stationCount": 5 }, { "confidence": "low", "geometryRef": "berlin-U7", "id": "berlin-u7-1980-rohrdamm", "kind": "extension", "label": { "en": "Spandau extension: Richard-Wagner-Platz → Rohrdamm (Siemensstadt)" }, "notes": "[Opening-date chase 2026-06-13] First proper U-Bahn connection for the Spandau district (Richard-Wagner-Platz–Rohrdamm).", "opened": "1980-10-01", "segment": { "fromStopIndex": 28, "toStopIndex": 34 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260511061420/https://en.wikipedia.org/wiki/U7_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "The extension to Rohrdamm followed on 1 October 1980, providing the district of Spandau with its first underground connection.", "tier": "secondary", "title": "U7 (Berlin U-Bahn) — Wikipedia (Richard-Wagner-Platz–Rohrdamm opened 1 Oct 1980)", "url": "https://en.wikipedia.org/wiki/U7_(Berlin_U-Bahn)" } ], "stationCount": 6 }, { "confidence": "low", "cost": { "basis": "outturn", "confidence": "low", "nominal": { "currency": "DEM", "isEstimate": false, "value": 680000000, "year": 1984 }, "notes": "The final Spandau extension (Rohrdamm–Rathaus Spandau, opened 1 Oct 1984 with Chancellor Helmut Kohl) was costly because it had to undercut the Havel river and cross swampy ground. English Wikipedia states this extension 'consumed 680 million German marks' (≈ €348m at the fixed 1.95583 DM/€ rate). The DM figure is the firm quoted value; the euro conversion is a fixed-rate indicative figure (denomination year ≈1984 nominal Marks). Recorded in native Deutsche Mark (≈ €348M). [Citation chase 2026-06-11] German Wikipedia independently corroborates the 680M DM figure but, like English Wikipedia, attaches no inline citation to the cost sentence — the provenance chain stops at Wikipedia with no locatable primary source (BVG/Senate document). Source phrasing (\"costs rose to unexpected heights\") indicates this is the actual final outturn including overruns, not a budget or estimate.", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260511061420/https://en.wikipedia.org/wiki/U7_(Berlin_U-Bahn)", "kind": "wikipedia", "title": "U7 (Berlin U-Bahn) — Wikipedia (Spandau extension consumed 680M DM)", "url": "https://en.wikipedia.org/wiki/U7_(Berlin_U-Bahn)" } ] }, "geometryRef": "berlin-U7", "id": "berlin-u7-1984-rathausspandau", "kind": "extension", "label": { "en": "West terminus: Rohrdamm → Rathaus Spandau (under the Havel)" }, "notes": "[Opening-date chase 2026-06-13] Final U7 section Rohrdamm → Rathaus Spandau opened 1 October 1984 with Federal Chancellor Helmut Kohl in attendance.", "opened": "1984-10-01", "segment": { "fromStopIndex": 34, "toStopIndex": 38 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260511061420/https://en.wikipedia.org/wiki/U7_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "The costs of the extension to the Spandau city centre rose to unexpected heights: it consumed 680 million German marks as a result of the need to undercut the Havel river and the swampy ground in the surrounding area.", "tier": "secondary", "title": "U7 (Berlin U-Bahn) — Wikipedia (Rohrdamm–Rathaus Spandau opened 1 Oct 1984)", "url": "https://en.wikipedia.org/wiki/U7_(Berlin_U-Bahn)" } ], "stationCount": 4 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260511061420/https://en.wikipedia.org/wiki/U7_(Berlin_U-Bahn)", "kind": "wikipedia", "tier": "secondary", "title": "U7 (Berlin U-Bahn) — Wikipedia", "url": "https://en.wikipedia.org/wiki/U7_(Berlin_U-Bahn)" } ] }, { "cityId": "berlin", "color": "#224F86", "displayNumber": "U8", "id": "berlin-line-U8", "name": { "de": "U8 — GN-Bahn (Linie D)", "en": "U8 (Wittenau ↔ Hermannstraße)" }, "phases": [ { "confidence": "medium", "constructionStart": "1926", "geometryRef": "berlin-U8", "id": "berlin-u8-1930-gnbahn", "kind": "initial", "label": { "en": "GN-Bahn (Linie D) opens: Boddinstraße → Kottbusser Tor → Neanderstraße → Gesundbrunnen" }, "notes": "Built in the Goldmark/Reichsmark era. No reliable, natively-sourced construction cost was found; the prior euro figure was era-mislabeled (the period used Goldmark/Reichsmark) and is not reliably convertible to 2026€, so no cost is recorded. [Date chase 2026-06-12] German Wikipedia ('Erst 1926 wurden die Bauarbeiten an der GN-Bahn fortgesetzt') corroborates the 1926 resumption year, but neither wiki carries an inline citation for the 1926 statement; support remains Wikipedia-level only. The 1914 original AEG start (cited to Deutsche Straßen und Kleinbahnzeitung, 23 May 1914) is a separate earlier event. [Opening-date chase 2026-06-13] Phase date 1930-04-18 marks completion of the final GN-Bahn section (Neanderstraße→Gesundbrunnen); earlier GN-Bahn stages opened from 17 July 1927 onward.", "opened": "1930-04-18", "segment": { "fromStopIndex": 2, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260511061423/https://en.wikipedia.org/wiki/U8_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "The section from Neanderstraße to Gesundbrunnen opened on 18 April 1930", "tier": "secondary", "title": "U8 (Berlin U-Bahn) — Wikipedia (completed to Gesundbrunnen 18 Apr 1930)", "url": "https://en.wikipedia.org/wiki/U8_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260516204339/https://de.wikipedia.org/wiki/U-Bahn-Linie_U8_(Berlin)", "kind": "other", "publisher": "Wikipedia (German)", "quote": "Erst 1926 wurden die Bauarbeiten an der GN-Bahn fortgesetzt.", "tier": "tertiary", "title": "U-Bahn-Linie U8 (Berlin) — Wikipedia (Deutsch)", "url": "https://de.wikipedia.org/wiki/U-Bahn-Linie_U8_(Berlin)", "via": "https://en.wikipedia.org/wiki/U8_(Berlin_U-Bahn)" } ], "stationCount": 12 }, { "confidence": "medium", "geometryRef": "berlin-U8", "id": "berlin-u8-1929-leinestrasse", "kind": "extension", "label": { "en": "South: Boddinstraße → Leinestraße" }, "notes": "[Opening-date chase 2026-06-13] Both EN and DE Wikipedia give only 'August 1929' for Leinestraße; the specific day (01) is not sourced.", "opened": "1929-08-01", "segment": { "fromStopIndex": 1, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260511061423/https://en.wikipedia.org/wiki/U8_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "An additional station opened south of Boddinstraße, Leinestraße (in August 1929)", "tier": "secondary", "title": "U8 (Berlin U-Bahn) — Wikipedia (Leinestraße added Aug 1929)", "url": "https://en.wikipedia.org/wiki/U8_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260516204339/https://de.wikipedia.org/wiki/U-Bahn-Linie_U8_(Berlin)", "kind": "other", "publisher": "Wikipedia (DE)", "quote": "Ein Jahr später wurde südlich des Bahnhofs Boddinstraße zusätzlich noch ein weiterer Bahnhof erbaut, der Bahnhof Leinestraße (Eröffnung war im August 1929).", "tier": "secondary", "title": "U-Bahn-Linie U8 (Berlin) — Wikipedia (Deutsch)", "url": "https://de.wikipedia.org/wiki/U-Bahn-Linie_U8_(Berlin)", "via": "https://en.wikipedia.org/wiki/U8_(Berlin_U-Bahn)" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "berlin-U8", "id": "berlin-u8-1977-osloer", "kind": "extension", "label": { "en": "North extension: Gesundbrunnen → Osloer Straße. (Cold-War note: the U8 passed under East Berlin's Mitte with six sealed ghost stations — Bernauer Straße, Rosenthaler Platz, Weinmeisterstraße, Alexanderplatz, Jannowitzbrücke, Heinrich-Heine-Straße — 1961–1990; trains passed through without stopping.)" }, "opened": "1977-10-05", "segment": { "fromStopIndex": 13, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260511061423/https://en.wikipedia.org/wiki/U8_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "Work on that extension began in 1973, and the 1.4 km (0.87 mi) extension was opened on 5 October 1977", "tier": "secondary", "title": "U8 (Berlin U-Bahn) — Wikipedia (Gesundbrunnen–Osloer Straße opened 5 Oct 1977)", "url": "https://en.wikipedia.org/wiki/U8_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260516204339/https://de.wikipedia.org/wiki/U-Bahn-Linie_U8_(Berlin)", "kind": "other", "publisher": "Wikipedia (DE)", "quote": "Nach dem Beginn der Bauarbeiten im Jahr 1973 konnte die 1,4 km lange Erweiterung am 5. Oktober 1977 eröffnet werden.", "tier": "secondary", "title": "U-Bahn-Linie U8 (Berlin) — Wikipedia (Deutsch)", "url": "https://de.wikipedia.org/wiki/U-Bahn-Linie_U8_(Berlin)", "via": "https://en.wikipedia.org/wiki/U8_(Berlin_U-Bahn)" } ], "stationCount": 2 }, { "confidence": "medium", "constructionStart": "1980", "geometryRef": "berlin-U8", "id": "berlin-u8-1987-paracelsus", "kind": "extension", "label": { "en": "North extension: Osloer Straße → Paracelsus-Bad" }, "notes": "[Date chase 2026-06-12] German Wikipedia corroborates 1980 as the construction-start year but omits the day/month; the '12 September 1980' specific date appears only in English Wikipedia and carries no inline citation, so the precise day remains unverified though the year is well-supported. [Opening-date chase 2026-06-13] Originally planned for 30 April 1987 (Berlin's 750th anniversary) but brought forward 3 days; 27 April 1987 is the actual revenue-service opening, not a pre-opening.", "opened": "1987-04-27", "segment": { "fromStopIndex": 15, "toStopIndex": 17 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260511061423/https://en.wikipedia.org/wiki/U8_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "on 27 April 1987, was it possible to open the next section of the line, to Paracelsus-Bad (construction had begun on 12 September 1980)", "tier": "secondary", "title": "U8 (Berlin U-Bahn) — Wikipedia (Osloer Straße–Paracelsus-Bad opened 27 Apr 1987)", "url": "https://en.wikipedia.org/wiki/U8_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260516204339/https://de.wikipedia.org/wiki/U-Bahn-Linie_U8_(Berlin)", "kind": "other", "publisher": "Wikipedia (German)", "quote": "Erst zehn Jahre später, am 27. April 1987, konnte das nächste Streckenstück bis zum Paracelsus-Bad in Betrieb genommen werden (die Bauarbeiten hatten 1980 begonnen).", "tier": "tertiary", "title": "U-Bahn-Linie U8 (Berlin) — Wikipedia (Deutsch)", "url": "https://de.wikipedia.org/wiki/U-Bahn-Linie_U8_(Berlin)", "via": "https://en.wikipedia.org/wiki/U8_(Berlin_U-Bahn)" } ], "stationCount": 2 }, { "confidence": "medium", "cost": { "basis": "outturn", "confidence": "low", "nominal": { "currency": "DEM", "isEstimate": false, "value": 600000000, "year": 1994 }, "notes": "The 3.6 km northern extension to Wittenau (four/five new stations) opened 24 Sep 1994 and cost ≈ 600 million Deutsche Mark (≈ €307m at the fixed 1.95583 DM/€ rate). The DM figure is firm; the euro conversion is fixed-rate indicative (≈1994 nominal Marks). NOTE: OSM's U8 route=subway relation omits the Wittenau stop node (the track is present, the stop is not), so this phase draws to ≈Rathaus Reinickendorf — one station short of the true Wittenau terminus. Upstream OSM data gap, not a fetch-bbox limit. Recorded in native Deutsche Mark (≈ €307M). [Citation chase 2026-06-11] The 600M DM figure is uncited in both English and German Wikipedia and could not be traced to any primary source (BVG report, Berlin Senate/Abgeordnetenhaus document) or contemporaneous news; it appears to circulate solely through Wikipedia, so the figure is plausible but independently unverified.", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260511061423/https://en.wikipedia.org/wiki/U8_(Berlin_U-Bahn)", "kind": "wikipedia", "title": "U8 (Berlin U-Bahn) — Wikipedia (Wittenau extension 3.6 km, ≈600M DM, opened 24 Sep 1994)", "url": "https://en.wikipedia.org/wiki/U8_(Berlin_U-Bahn)" } ] }, "geometryRef": "berlin-U8", "id": "berlin-u8-1994-wittenau", "kind": "extension", "label": { "en": "North terminus: Paracelsus-Bad → Rathaus Reinickendorf (→ Wittenau). The U8 track in OSM does reach Wittenau, but OSM's route relation omits the Wittenau stop node, so the modelled phase draws to Rathaus Reinickendorf — one stop short of the true terminus." }, "opened": "1994-09-24", "segment": { "fromStopIndex": 17, "toStopIndex": 22 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260511061423/https://en.wikipedia.org/wiki/U8_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "The completed extension, which is 3.6 km (2.2 mi) long and comprises 4 new stations, was opened on 24 September 1994. Construction cost 600 million DM", "tier": "secondary", "title": "U8 (Berlin U-Bahn) — Wikipedia (extended to Wittenau 24 Sep 1994)", "url": "https://en.wikipedia.org/wiki/U8_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260516204339/https://de.wikipedia.org/wiki/U-Bahn-Linie_U8_(Berlin)", "kind": "other", "publisher": "Wikipedia (DE)", "quote": "Die Neubaustrecke, die 3,6 km lang ist und vier neue Bahnhöfe hat, wurde am 24. September 1994 eröffnet.", "tier": "secondary", "title": "U-Bahn-Linie U8 (Berlin) — Wikipedia (Deutsch)", "url": "https://de.wikipedia.org/wiki/U-Bahn-Linie_U8_(Berlin)", "via": "https://en.wikipedia.org/wiki/U8_(Berlin_U-Bahn)" } ], "stationCount": 5 }, { "confidence": "medium", "geometryRef": "berlin-U8", "id": "berlin-u8-1996-hermannstrasse", "kind": "extension", "label": { "en": "South terminus: Leinestraße → Hermannstraße (line completed)" }, "opened": "1996-07-13", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260511061423/https://en.wikipedia.org/wiki/U8_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "on 13 July 1996, the 168th Berlin U-Bahn station opened", "tier": "secondary", "title": "U8 (Berlin U-Bahn) — Wikipedia (Hermannstraße opened 13 Jul 1996)", "url": "https://en.wikipedia.org/wiki/U8_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260516204339/https://de.wikipedia.org/wiki/U-Bahn-Linie_U8_(Berlin)", "kind": "other", "publisher": "Wikipedia (DE)", "quote": "Schließlich wurde am 13. Juli 1996 der 168. Berliner U-Bahnhof eröffnet.", "tier": "secondary", "title": "U-Bahn-Linie U8 (Berlin) — Wikipedia (Deutsch)", "url": "https://de.wikipedia.org/wiki/U-Bahn-Linie_U8_(Berlin)", "via": "https://en.wikipedia.org/wiki/U8_(Berlin_U-Bahn)" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260511061423/https://en.wikipedia.org/wiki/U8_(Berlin_U-Bahn)", "kind": "wikipedia", "tier": "secondary", "title": "U8 (Berlin U-Bahn) — Wikipedia", "url": "https://en.wikipedia.org/wiki/U8_(Berlin_U-Bahn)" } ] }, { "cityId": "berlin", "color": "#F3791D", "displayNumber": "U9", "id": "berlin-line-U9", "name": { "de": "U9 — Linie G", "en": "U9 (Osloer Straße ↔ Rathaus Steglitz)" }, "phases": [ { "confidence": "medium", "constructionStart": "1955", "geometryRef": "berlin-U9", "id": "berlin-u9-1961-leopoldplatz-spichernstrasse", "kind": "initial", "label": { "en": "Linie G opens: Leopoldplatz → Spichernstraße — the first wholly West-Berlin north–south line, its opening on 28 Aug 1961 accelerated by the Berlin Wall two weeks earlier." }, "notes": "[Date chase 2026-06-12] German Wikipedia corroborates the 23 June 1955 Tiergarten groundbreaking ('erster Rammschlag'), independent of the AI-flagged English article. [Opening-date chase 2026-06-13] Revenue service began 28 Aug 1961 without ceremony, accelerated by the Berlin Wall (erected 13 Aug 1961); the official inauguration ceremony was held on the originally planned date of 2 Sep 1961.", "opened": "1961-08-28", "segment": { "fromStopIndex": 2, "toStopIndex": 11 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260326141741/https://en.wikipedia.org/wiki/U9_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "Groundbreaking took place on 23 June 1955 at Tiergarten.", "tier": "secondary", "title": "U9 (Berlin U-Bahn) — Wikipedia (Leopoldplatz–Spichernstraße opened 28 Aug 1961)", "url": "https://en.wikipedia.org/wiki/U9_(Berlin_U-Bahn)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613161235/https://signalarchiv.de/Meldungen/10000712", "kind": "news", "publisher": "Signal / IGEB (Interessengemeinschaft Eisenbahn, Nahverkehr und Fahrgastbelange Berlin)", "quote": "Die Linie G, wie sie bis 1966 bezeichnet wurde, [war] gerade rechtzeitig zum Bau der Mauer (und dem Beginn des S-Bahn-Boykotts) fertig geworden. Die offizielle Einweihung erfolgte dann wie geplant am 2. September. [Line opened] am 28. August, ohne Feierlichkeiten.", "tier": "secondary", "title": "Die U-Bahn-Linie in die Welt von morgen (Signal 5–6/2011, 50 Jahre U9)", "url": "https://signalarchiv.de/Meldungen/10000712", "via": "https://de.wikipedia.org/wiki/U-Bahn-Linie_U9_(Berlin)" } ], "stationCount": 9 }, { "confidence": "low", "constructionStart": "1962-07-01", "geometryRef": "berlin-U9", "id": "berlin-u9-1971-walther-schreiber", "kind": "extension", "label": { "en": "South extension: Spichernstraße → Walther-Schreiber-Platz" }, "notes": "[Date chase 2026-06-12] Groundbreaking for the Spichernstrasse to Walther-Schreiber-Platz (Friedenauer) extension was 1 July 1962 ('erster Spatenstich'), construction running 1962-71; confirmed by German Wikipedia and berliner-untergrundbahn.de, not only the AI-flagged English article. Curated 1969 likely conflated with the Osloer Strasse segment. [Corrected 2026-06-12 after date chase] Construction start corrected 1969→1962: groundbreaking 1 Jul 1962 per DE+EN Wikipedia and berliner-untergrundbahn.de (independent); 1969 was a mis-attribution from the Osloer Strasse segment. Panel-confirmed.", "opened": "1971-01-29", "segment": { "fromStopIndex": 11, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260326141741/https://en.wikipedia.org/wiki/U9_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "All stations in this extension were designed by Rainer G. Rümmler", "tier": "secondary", "title": "U9 (Berlin U-Bahn) — Wikipedia (Spichernstraße–Walther-Schreiber-Platz opened 29 Jan 1971)", "url": "https://en.wikipedia.org/wiki/U9_(Berlin_U-Bahn)" } ], "stationCount": 4 }, { "confidence": "low", "geometryRef": "berlin-U9", "id": "berlin-u9-1974-rathaus-steglitz", "kind": "extension", "label": { "en": "South terminus: Walther-Schreiber-Platz → Rathaus Steglitz" }, "notes": "[Opening-date chase 2026-06-13] A primary government Eröffnungsschrift (Senator für Bau- und Wohnungswesen, 1974) is cited by German Wikipedia and is hosted at berliner-verkehrsseiten.de; the date could not be extracted without a PDF parser.", "opened": "1974-09-30", "segment": { "fromStopIndex": 15, "toStopIndex": 16 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260326141741/https://en.wikipedia.org/wiki/U9_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "The section to Rathaus Steglitz was definitely opened on 30 September 1974, its construction began on 7 July 1969.", "tier": "secondary", "title": "U9 (Berlin U-Bahn) — Wikipedia (Walther-Schreiber-Platz–Rathaus Steglitz opened 30 Sep 1974)", "url": "https://en.wikipedia.org/wiki/U9_(Berlin_U-Bahn)" } ], "stationCount": 1 }, { "confidence": "low", "constructionStart": "1969", "geometryRef": "berlin-U9", "id": "berlin-u9-1976-osloer-strasse", "kind": "extension", "label": { "en": "North terminus: Leopoldplatz → Osloer Straße (Nauener Platz, Osloer Straße)" }, "notes": "[Date chase 2026-06-12] Note the program-level distinction: German Wikipedia dates the 1962 'erster Spatenstich' to 'beide Neubaustrecken' (both second-stage lines), but the specific Osloer Strasse segment's construction is dated 6 Nov 1969 by English Wikipedia, which is what the curated date reflects.", "opened": "1976-04-30", "segment": { "fromStopIndex": 0, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260326141741/https://en.wikipedia.org/wiki/U9_(Berlin_U-Bahn)", "kind": "wikipedia", "quote": "It was opened on 30 April 1976, construction began on 6 November 1969.", "tier": "secondary", "title": "U9 (Berlin U-Bahn) — Wikipedia (Leopoldplatz–Osloer Straße opened 30 Apr 1976)", "url": "https://en.wikipedia.org/wiki/U9_(Berlin_U-Bahn)" } ], "stationCount": 2 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260326141741/https://en.wikipedia.org/wiki/U9_(Berlin_U-Bahn)", "kind": "wikipedia", "tier": "secondary", "title": "U9 (Berlin U-Bahn) — Wikipedia", "url": "https://en.wikipedia.org/wiki/U9_(Berlin_U-Bahn)" } ] } ], "name": { "de": "Berlin", "en": "Berlin" } }, { "bbox": [ -71.27, 42.18, -70.98, 42.47 ], "center": [ -71.06, 42.355 ], "country": "United States", "defaultZoom": 10.3, "homeCurrency": "USD", "id": "boston", "lines": [ { "cityId": "boston", "color": "#DA291C", "displayNumber": "Red", "id": "boston-line-Red", "name": { "en": "Red Line" }, "phases": [ { "confidence": "medium", "constructionStart": "1909", "geometryRef": "boston-Red", "id": "boston-red-1912", "kind": "initial", "label": { "en": "Cambridge subway opens: Harvard → Park Street (initial line)" }, "notes": "Opened by Boston Elevated Railway as the Cambridge tunnel (later the Cambridge–Dorchester line, renamed Red Line in 1965). 4 stations: Harvard, Central, Kendall, Park Street. No reliable construction cost figure located for the original tunnel. [Date chase 2026-06-12] Harvard station article gives a precise start of May 24, 1909 (Cheney 2002), corroborating the curated 1909.", "opened": "1912-03-23", "segment": { "fromStopIndex": 3, "toStopIndex": 7 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260106162341/https://en.wikipedia.org/wiki/Cambridge_Tunnel", "kind": "wikipedia", "quote": "The section from Harvard (and new maintenance facilities at Eliot Yard) to Park Street was opened by the Boston Elevated Railway (BERy) on March 23, 1912.", "tier": "tertiary", "title": "Cambridge Tunnel / Cambridge subway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Cambridge_Tunnel" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611112757/https://en.wikipedia.org/wiki/Cambridge_subway", "kind": "wikipedia", "quote": "The contending groups finally compromised on two intermediate stations, at Central and Kendall Squares, allowing construction to start in 1909.", "tier": "tertiary", "title": "Cambridge subway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Cambridge_subway" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260426022315/https://en.wikipedia.org/wiki/Harvard_station", "kind": "other", "publisher": "Wikipedia", "quote": "Construction began on May 24, 1909.", "tier": "secondary", "title": "Harvard station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Harvard_station", "via": "https://en.wikipedia.org/wiki/Harvard_station" } ], "stationCount": 4 }, { "confidence": "low", "geometryRef": "boston-Red", "id": "boston-red-1915", "kind": "extension", "label": { "en": "Dorchester Tunnel extension opens: Park Street → Washington (Downtown Crossing)" }, "notes": "Southward extension of the Cambridge–Dorchester line via the Dorchester Tunnel to Washington Street station (now Downtown Crossing). Opened April 4, 1915. [Opening-date chase 2026-06-13] Red Line (MBTA) narrative gives the precise revenue-service date April 4, 1915 (curated source quoted only the year).", "opened": "1915-04-04", "segment": { "fromStopIndex": 7, "toStopIndex": 8 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260608233719/https://en.wikipedia.org/wiki/Red_Line_(MBTA)", "kind": "wikipedia", "quote": "extended south as the Dorchester Tunnel to Washington in 1915", "tier": "tertiary", "title": "Red Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Red_Line_(MBTA)" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "boston-Red", "id": "boston-red-1916", "kind": "extension", "label": { "en": "Dorchester Tunnel extension opens: Washington → South Station" }, "notes": "Extension under downtown Boston to South Station (South Station Under), opened December 3, 1916. [Opening-date chase 2026-06-13] Red Line (MBTA) narrative confirms the precise date December 3, 1916 (curated source quoted only the year).", "opened": "1916-12-03", "segment": { "fromStopIndex": 8, "toStopIndex": 9 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260608233719/https://en.wikipedia.org/wiki/Red_Line_(MBTA)", "kind": "wikipedia", "quote": "South Station in 1916", "tier": "tertiary", "title": "Red Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Red_Line_(MBTA)" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "boston-Red", "id": "boston-red-1917", "kind": "extension", "label": { "en": "Dorchester Tunnel extension opens: South Station → Broadway" }, "notes": "Extension across the Fort Point Channel to Broadway station in South Boston, opened December 15, 1917. [Opening-date chase 2026-06-13] Red Line (MBTA) narrative confirms precise date December 15, 1917 (curated source quoted only the year).", "opened": "1917-12-15", "segment": { "fromStopIndex": 9, "toStopIndex": 10 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260608233719/https://en.wikipedia.org/wiki/Red_Line_(MBTA)", "kind": "wikipedia", "quote": "Broadway in 1917", "tier": "tertiary", "title": "Red Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Red_Line_(MBTA)" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "boston-Red", "id": "boston-red-1918", "kind": "extension", "label": { "en": "Dorchester Tunnel extension opens: Broadway → Andrew" }, "notes": "Extension to Andrew station, which served as the southern terminus until the Dorchester (Ashmont) extension opened in 1927. Opened June 29, 1918. [Opening-date chase 2026-06-13] Red Line (MBTA) narrative confirms precise date June 29, 1918 (curated source quoted only the year).", "opened": "1918-06-29", "segment": { "fromStopIndex": 10, "toStopIndex": 11 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260608233719/https://en.wikipedia.org/wiki/Red_Line_(MBTA)", "kind": "wikipedia", "quote": "and Andrew in 1918", "tier": "tertiary", "title": "Red Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Red_Line_(MBTA)" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "boston-Red#2", "id": "boston-red-1927", "kind": "extension", "label": { "en": "Dorchester (Ashmont) extension opens: Andrew → Fields Corner" }, "notes": "Surface extension along the former Shawmut Branch Railroad right-of-way (acquired 1870). Three new stations added: Columbia (now JFK/UMass), Savin Hill, and Fields Corner. Opened November 5, 1927. [Opening-date chase 2026-06-13] Red Line (MBTA) narrative confirms precise date November 5, 1927 (curated source quoted only the year).", "opened": "1927-11-05", "segment": { "fromStopIndex": 2, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260608233719/https://en.wikipedia.org/wiki/Red_Line_(MBTA)", "kind": "wikipedia", "quote": "with three additional stops added to Fields Corner in 1927", "tier": "tertiary", "title": "Red Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Red_Line_(MBTA)" } ], "stationCount": 3 }, { "confidence": "medium", "geometryRef": "boston-Red#2", "id": "boston-red-1928", "kind": "extension", "label": { "en": "Dorchester (Ashmont) extension opens: Fields Corner → Ashmont" }, "notes": "Continuation of the Dorchester surface extension to Ashmont (terminal) and Codman Yard. Two new stations added: Shawmut and Ashmont. Opened September 1, 1928. [Opening-date chase 2026-06-13] Revenue-service opening September 1, 1928 corroborated by a contemporary Boston Globe clipping ('Rapid transit extension to Ashmont is opened', Sep 1, 1928, p.12); paywalled but cited via Red Line (MBTA).", "opened": "1928-09-01", "segment": { "from": [ -71.0634234, 42.2839548 ], "to": [ -71.0612761, 42.3001325 ] }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260608233719/https://en.wikipedia.org/wiki/Red_Line_(MBTA)", "kind": "wikipedia", "quote": "and two more stops to Ashmont in 1928", "tier": "tertiary", "title": "Red Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Red_Line_(MBTA)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20221119001911/https://www.newspapers.com/clip/56417978/the-boston-globe/", "kind": "news", "publisher": "Boston Globe", "quote": "Rapid transit extension to Ashmont is opened [Boston Globe, September 1, 1928, page 12]", "tier": "secondary", "title": "Rapid transit extension to Ashmont is opened", "url": "https://www.newspapers.com/clip/56417978/the-boston-globe/", "via": "https://en.wikipedia.org/wiki/Red_Line_(MBTA)" } ], "stationCount": 2 }, { "confidence": "low", "geometryRef": null, "id": "boston-red-1932", "kind": "extension", "label": { "en": "Charles/MGH infill station opens" }, "notes": "Infill station added on the Longfellow Bridge approach (Boston side), between Park Street and Kendall. No new track — single new station on existing line.", "opened": "1932-02-27", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260608233719/https://en.wikipedia.org/wiki/Red_Line_(MBTA)", "kind": "wikipedia", "quote": "Charles/MGH station, an infill station, opened on February 27, 1932", "tier": "tertiary", "title": "Red Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Red_Line_(MBTA)" } ], "stationCount": 1 }, { "confidence": "medium", "constructionStart": "1966", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": true, "value": 5877000, "year": 1971 }, "notes": "Sourced figure is for Quincy Center STATION ALONE ($5.877M), NOT the full three-station South Shore Line extension, for which no total cost figure was located. [Citation chase 2026-06-11] The $5,877,000 figure traces to the 1986 Thomas Crane Library historic/architectural survey of Quincy (p.77), which describes the completed station retrospectively (\"was... constructed by the J. F. White Co.\"), indicating this is the actual built cost of Quincy Center station plus its 900-car garage rather than an estimate; the figure is in nominal 1971 USD.", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611113152/https://en.wikipedia.org/wiki/Quincy_Center_station", "kind": "wikipedia", "quote": "North Quincy, Wollaston, and Quincy Center stations opened on September 1, 1971.", "tier": "tertiary", "title": "Quincy Center station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Quincy_Center_station" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611113152/https://en.wikipedia.org/wiki/Quincy_Center_station", "kind": "wikipedia", "quote": "In May 1966, the MBTA began construction on the South Shore Line branch.", "tier": "tertiary", "title": "Quincy Center station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Quincy_Center_station" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611113152/https://en.wikipedia.org/wiki/Quincy_Center_station", "kind": "wikipedia", "quote": "The $5.877 million station, located a block north of the Old Colony station site, was designed Samuel Glaser Associates and built by J.F. White.", "tier": "tertiary", "title": "Quincy Center station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Quincy_Center_station" }, { "accessedAt": "2026-06-11", "kind": "primary", "publisher": "Thomas Crane Public Library, Quincy, Massachusetts", "quote": "The $5,877,000 Quincy Center Station and the five level, 900-car parking garage, which includes a floor of 200 cars just for Quincy shoppers, was designed by Samuel Glaser Associates and constructed by the J. F. White Co.", "tier": "secondary", "title": "Off Hancock Street — Historic and Architectural Survey Quincy, Massachusetts, p. 77 (1986)", "url": "https://web.archive.org/web/20110720204650/http://thomascranelibrary.org/htm/161.htm", "via": "https://en.wikipedia.org/wiki/Quincy_Center_station" } ] }, "geometryRef": "boston-Red", "id": "boston-red-1971", "kind": "extension", "label": { "en": "South Shore Line opens: Columbia (JFK/UMass) → Quincy Center" }, "notes": "First section of the South Shore Line, branching at a flying junction north of Columbia (now JFK/UMass), built along the former Old Colony right-of-way. Three new stations: North Quincy, Wollaston, Quincy Center. Cost figure given is for Quincy Center station only ($5.877M, ~1971), not the whole extension. [Date chase 2026-06-12] Red Line (MBTA) article corroborates 'under construction since 1966', consistent with the Quincy Center 'May 1966' start.", "opened": "1971-09-01", "segment": { "fromStopIndex": 12, "toStopIndex": 14 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611113152/https://en.wikipedia.org/wiki/Quincy_Center_station", "kind": "wikipedia", "quote": "North Quincy, Wollaston, and Quincy Center stations opened on September 1, 1971.", "tier": "tertiary", "title": "Quincy Center station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Quincy_Center_station" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611113152/https://en.wikipedia.org/wiki/Quincy_Center_station", "kind": "wikipedia", "quote": "In May 1966, the MBTA began construction on the South Shore Line branch.", "tier": "tertiary", "title": "Quincy Center station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Quincy_Center_station" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611113152/https://en.wikipedia.org/wiki/Quincy_Center_station", "kind": "wikipedia", "quote": "The $5.877 million station, located a block north of the Old Colony station site, was designed Samuel Glaser Associates and built by J.F. White.", "tier": "tertiary", "title": "Quincy Center station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Quincy_Center_station" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260608233719/https://en.wikipedia.org/wiki/Red_Line_(MBTA)", "kind": "other", "publisher": "Wikipedia", "quote": "The first section of the South Shore line, under construction since 1966, opened on September 1, 1971.", "tier": "secondary", "title": "Red Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Red_Line_(MBTA)", "via": "https://en.wikipedia.org/wiki/Red_Line_(MBTA)" } ], "stationCount": 3 }, { "confidence": "medium", "constructionStart": "1977", "geometryRef": "boston-Red", "id": "boston-red-1980", "kind": "extension", "label": { "en": "South Shore Line extension opens: Quincy Center → Braintree" }, "notes": "Braintree extension of the South Shore Line; Braintree opened March 22, 1980 as terminal. Construction groundbreaking July 13, 1977. The intermediate Quincy Adams infill station opened later (September 10, 1983) due to delays. No total construction cost figure located. [Date chase 2026-06-12] Quincy Center article corroborates 'Further construction began in 1977', matching the Braintree July 13, 1977 groundbreaking.", "opened": "1980-03-22", "segment": { "fromStopIndex": 14, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611054021/https://en.wikipedia.org/wiki/Braintree_station_(MBTA)", "kind": "wikipedia", "quote": "The station opened on March 22, 1980, for Red Line service.", "tier": "tertiary", "title": "Braintree station (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Braintree_station_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611054021/https://en.wikipedia.org/wiki/Braintree_station_(MBTA)", "kind": "wikipedia", "quote": "A groundbreaking ceremony occurred on July 13, 1977", "tier": "tertiary", "title": "Braintree station (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Braintree_station_(MBTA)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260611113152/https://en.wikipedia.org/wiki/Quincy_Center_station", "kind": "other", "publisher": "Wikipedia", "quote": "Further construction began in 1977, and the line was extended to Braintree on March 22, 1980.", "tier": "secondary", "title": "Quincy Center station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Quincy_Center_station", "via": "https://en.wikipedia.org/wiki/Quincy_Center_station" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": null, "id": "boston-red-1983", "kind": "extension", "label": { "en": "Quincy Adams infill station opens (Braintree branch)" }, "notes": "Infill station on the already-open Quincy Center–Braintree segment; opened September 10, 1983 after construction delays. [Opening-date chase 2026-06-13] Quincy Adams infill opened September 10, 1983, later than the rest of the Braintree branch due to construction delays.", "opened": "1983-09-10", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260608233719/https://en.wikipedia.org/wiki/Red_Line_(MBTA)", "kind": "wikipedia", "quote": "with Quincy Adams added as an infill in 1983", "tier": "tertiary", "title": "Red Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Red_Line_(MBTA)" } ], "stationCount": 1 }, { "closed": "1983-09-01", "confidence": "medium", "constructionStart": "1978", "geometryRef": null, "id": "boston-red-1979", "kind": "extension", "label": { "en": "Temporary Harvard/Brattle terminus opens (Northwest Extension construction)" }, "notes": "Temporary Harvard/Brattle station served as northern terminus while the original Harvard station was demolished and rebuilt during the Northwest Extension project. Operated March 24, 1979 to September 1, 1983, then closed. [Date chase 2026-06-12] Harvard station article: construction contract approved Dec 7, 1977, groundbreaking Jan 23, 1978 for the temporary Harvard/Brattle station; Red Line article confirms NW Extension construction began 1978. [Opening-date chase 2026-06-13] Harvard/Brattle was a temporary terminus (Mar 24, 1979 – Sep 1, 1983) during Northwest Extension reconstruction.", "opened": "1979-03-24", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260426022315/https://en.wikipedia.org/wiki/Harvard_station", "kind": "wikipedia", "quote": "The station was open from March 24, 1979, to September 1, 1983, and was the northern terminus of the Red Line during that period.", "tier": "tertiary", "title": "Harvard station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Harvard_station" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260608233719/https://en.wikipedia.org/wiki/Red_Line_(MBTA)", "kind": "other", "publisher": "Wikipedia", "quote": "By the time the northwest extension began construction in 1978, opposition in Arlington and reductions in federal funding had caused the MBTA to choose the shorter Alewife alternative.", "tier": "secondary", "title": "Red Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Red_Line_(MBTA)", "via": "https://en.wikipedia.org/wiki/Red_Line_(MBTA)" } ], "stationCount": 1 }, { "confidence": "low", "cost": { "basis": "outturn", "confidence": "low", "nominal": { "currency": "USD", "isEstimate": false, "value": 72000000, "year": 1985 }, "notes": "$72M covers the entire Harvard station reconstruction project (new station, tunnel realignment and busway, 1979–1985), not a single station element. Price level ~1985 (project completion). [Citation chase 2026-06-11] The $72M figure traces to a single Boston Globe article (Sept 8, 1985) cited by Wikipedia; that article is paywalled with no Wayback snapshot, so it could not be independently verified. It represents the actual completion (outturn) cost of the standalone Harvard reconstruction and is distinct from the MBTA's $574M four-station northwest extension.", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260426022315/https://en.wikipedia.org/wiki/Harvard_station", "kind": "wikipedia", "quote": "The Church Street secondary entrance to the new station opened on September 6, 1983.", "tier": "tertiary", "title": "Harvard station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Harvard_station" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260426022315/https://en.wikipedia.org/wiki/Harvard_station", "kind": "wikipedia", "quote": "The renovated busway opened on September 7, 1985, completing the $72 million construction project.", "tier": "tertiary", "title": "Harvard station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Harvard_station" } ] }, "geometryRef": null, "id": "boston-red-1983-2", "kind": "reopening", "label": { "en": "New Harvard station reopens (relocated, Northwest Extension)" }, "notes": "New Harvard station opened at a relocated position on September 6, 1983 (replacing the temporary Brattle terminus), as part of the Northwest Extension. Trains initially reversed at Davis without passengers before the Davis/Porter extension opened in Dec 1984. [Opening-date chase 2026-06-13] Revenue train service at the new (relocated) Harvard began Sep 6, 1983 (trains turned back at Davis without passengers); main lobby/headhouse and busway completed later (1985).", "opened": "1983-09-06", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260426022315/https://en.wikipedia.org/wiki/Harvard_station", "kind": "wikipedia", "quote": "The Church Street secondary entrance to the new station opened on September 6, 1983.", "tier": "tertiary", "title": "Harvard station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Harvard_station" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260426022315/https://en.wikipedia.org/wiki/Harvard_station", "kind": "wikipedia", "quote": "The renovated busway opened on September 7, 1985, completing the $72 million construction project.", "tier": "tertiary", "title": "Harvard station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Harvard_station" } ] }, { "confidence": "medium", "constructionStart": "1978", "geometryRef": "boston-Red", "id": "boston-red-1984", "kind": "extension", "label": { "en": "Northwest Extension opens: Harvard → Davis (via Porter)" }, "notes": "Northwest Extension from Harvard to Davis, adding Porter and Davis stations. Opened December 8, 1984. [Date chase 2026-06-12] NW Extension (incl. Harvard-Davis) construction began 1978 per Red Line article (citing Boston Globe Jun 16, 1979); Harvard station Jan 23, 1978 groundbreaking marks the start of physical NW Extension work.", "opened": "1984-12-08", "segment": { "fromStopIndex": 1, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260608233719/https://en.wikipedia.org/wiki/Red_Line_(MBTA)", "kind": "wikipedia", "quote": "The line was extended to Davis with a station at Porter on December 8, 1984", "tier": "tertiary", "title": "Red Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Red_Line_(MBTA)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260426022315/https://en.wikipedia.org/wiki/Harvard_station", "kind": "other", "publisher": "Wikipedia", "quote": "A $1.4 million construction contract was approved on December 7, 1977, with a groundbreaking ceremony on January 23, 1978.", "tier": "secondary", "title": "Harvard station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Harvard_station", "via": "https://en.wikipedia.org/wiki/Harvard_station" } ], "stationCount": 2 }, { "confidence": "low", "constructionStart": "1979", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "USD", "isEstimate": true, "value": 84000000, "year": 1985 }, "notes": "$84M is the cost of ALEWIFE STATION ALONE (budgeted $78M, final $84M), not the full Davis–Alewife segment. Price level ~1985. [Citation chase 2026-06-11] The $84M is the final actual (outturn) cost of Alewife station; $78M was the original estimate. Confirmed directly by the 1985 MBTA commemorative booklet (\"the $84 million glass-topped station\"). For reference, the full Red Line Northwest Extension cost ~$574M per the same MBTA document.", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260608233719/https://en.wikipedia.org/wiki/Red_Line_(MBTA)", "kind": "wikipedia", "quote": "The line was extended to its current terminus at Alewife on March 30, 1985", "tier": "tertiary", "title": "Red Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Red_Line_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260426020307/https://en.wikipedia.org/wiki/Alewife_station", "kind": "wikipedia", "quote": "Initially expected to cost $78 million to construct, the station ultimately cost $84 million.", "tier": "tertiary", "title": "Alewife station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Alewife_station" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260426020307/https://en.wikipedia.org/wiki/Alewife_station", "kind": "wikipedia", "quote": "Construction began in 1979", "tier": "tertiary", "title": "Alewife station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Alewife_station" }, { "accessedAt": "2026-06-11", "kind": "primary", "publisher": "Massachusetts Bay Transportation Authority", "quote": "The $84 million glass-topped station features a 12-berth busway, bicycle racks, works of art, \"talkback\" radios on the platform, and special needs access.", "tier": "primary", "title": "Red Line Northwest Extension", "url": "https://archive.org/details/redlinenortheast00mass", "via": "https://en.wikipedia.org/wiki/Alewife_station" } ] }, "geometryRef": "boston-Red", "id": "boston-red-1985", "kind": "extension", "label": { "en": "Northwest Extension opens: Davis → Alewife (terminus)" }, "notes": "Final segment of the Northwest Extension to current terminus Alewife. Off-peak/initial service opened March 30, 1985; full peak-hour service to Alewife began December 26, 1985 after completion of the Alewife yard (until then peak Braintree trains terminated at Davis). Cost figure is for Alewife station only ($84M, ~1985), not the whole segment. [Date chase 2026-06-12] Year ambiguity: NW Extension programme construction began 1978 (Red Line article + Alewife Construction subsection), while the Alewife-specific work is dated to 1979 (Alewife lead), reportedly after the Fitchburg Cutoff right-of-way was freed. Curated 1979 retained as the Alewife-segment-specific date. [Opening-date chase 2026-06-13] Alewife opened to off-peak service Mar 30, 1985 (the revenue-service opening); peak-hour Braintree trains were not extended to Alewife until December 26, 1985 — same year, minor.", "opened": "1985-03-30", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260608233719/https://en.wikipedia.org/wiki/Red_Line_(MBTA)", "kind": "wikipedia", "quote": "The line was extended to its current terminus at Alewife on March 30, 1985", "tier": "tertiary", "title": "Red Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Red_Line_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260426020307/https://en.wikipedia.org/wiki/Alewife_station", "kind": "wikipedia", "quote": "Initially expected to cost $78 million to construct, the station ultimately cost $84 million.", "tier": "tertiary", "title": "Alewife station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Alewife_station" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260426020307/https://en.wikipedia.org/wiki/Alewife_station", "kind": "wikipedia", "quote": "Construction began in 1979", "tier": "tertiary", "title": "Alewife station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Alewife_station" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260608233719/https://en.wikipedia.org/wiki/Red_Line_(MBTA)", "kind": "wikipedia", "quote": "extended south as the Dorchester Tunnel to Washington in 1915", "tier": "tertiary", "title": "Red Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Red_Line_(MBTA)" } ] }, { "cityId": "boston", "color": "#ED8B00", "displayNumber": "Orange", "id": "boston-line-Orange", "name": { "en": "Orange Line" }, "phases": [ { "confidence": "medium", "geometryRef": null, "id": "boston-orange-1901", "kind": "initial", "label": { "en": "Main Line Elevated opens: Sullivan Square → Dudley (Charlestown Elevated + Tremont Street subway + Washington Street Elevated)" }, "notes": "Original elevated rapid-transit Main Line of the Boston Elevated Railway. Ran from Sullivan Square in Charlestown over the Charlestown Elevated, through the Canal Street incline into the Tremont Street subway (later Green Line), out the Pleasant Street portal onto the Washington Street Elevated, terminating at Dudley Square (now Nubian Square), with intermediate elevated stations including Dover and Northampton. An Atlantic Avenue Elevated alternate downtown route also opened in 1901.", "opened": "1901-06-10", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611113840/https://en.wikipedia.org/wiki/Washington_Street_Elevated", "kind": "wikipedia", "quote": "The initial section of the Main Line Elevated opened on June 10, 1901, running from Sullivan Square... the initial section of the elevated ran only to Dudley Square (now known as Nubian Square), with intermediate stations at Dover and Northampton.", "tier": "tertiary", "title": "Washington Street Elevated — Wikipedia", "url": "https://en.wikipedia.org/wiki/Washington_Street_Elevated" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611113552/https://en.wikipedia.org/wiki/Orange_Line_(MBTA)", "kind": "wikipedia", "quote": "The Main Line of the electric Boston Elevated Railway opened in segments, starting in 1901.", "tier": "tertiary", "title": "Orange Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Orange_Line_(MBTA)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613161220/https://en.wikipedia.org/wiki/Charlestown_Elevated", "kind": "other", "publisher": "Wikipedia", "quote": "Building of the elevated began in 1899 and it opened for revenue service on June 10, 1901.", "tier": "tertiary", "title": "Charlestown Elevated — Wikipedia", "url": "https://en.wikipedia.org/wiki/Charlestown_Elevated", "via": "https://en.wikipedia.org/wiki/Washington_Street_Elevated" } ] }, { "confidence": "low", "geometryRef": "boston-Orange", "id": "boston-orange-1908", "kind": "extension", "label": { "en": "Washington Street Tunnel opens (Main Line rerouted underground through downtown)" }, "notes": "New downtown subway tunnel for the Main Line, replacing its use of the Tremont Street subway through downtown and connecting via a new portal at the Canal Street incline. This freed the Tremont Street subway for through streetcars.", "opened": "1908-11-30", "segment": { "fromStopIndex": 7, "toStopIndex": 10 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611113840/https://en.wikipedia.org/wiki/Washington_Street_Elevated", "kind": "wikipedia", "quote": "The Washington Street Tunnel was opened on November 30, 1908, providing a separate route for the Main Line and allowing use of the Tremont Street subway for through streetcars.", "tier": "tertiary", "title": "Washington Street Elevated — Wikipedia", "url": "https://en.wikipedia.org/wiki/Washington_Street_Elevated" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611113552/https://en.wikipedia.org/wiki/Orange_Line_(MBTA)", "kind": "wikipedia", "quote": "In 1908, a new Washington Street Tunnel opened, allowing Main Line service to travel from the Charlestown Elevated, underground via an additional new portal at the Canal Street incline.", "tier": "tertiary", "title": "Orange Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Orange_Line_(MBTA)" } ] }, { "confidence": "low", "geometryRef": null, "id": "boston-orange-1909", "kind": "extension", "label": { "en": "Washington Street Elevated extended: Dudley → Forest Hills" }, "notes": "Southern extension of the Washington Street Elevated, with an intermediate station at Egleston for streetcar transfers serving Roxbury and Dorchester. The Orange Line article dates this as 'By 1909'; the Washington Street Elevated article gives the precise date of November 22, 1909.", "opened": "1909-11-22", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611113840/https://en.wikipedia.org/wiki/Washington_Street_Elevated", "kind": "wikipedia", "quote": "The elevated was extended south to Forest Hills on November 22, 1909, with an intermediate station at Egleston to transfer passengers from streetcars serving Roxbury and Dorchester.", "tier": "tertiary", "title": "Washington Street Elevated — Wikipedia", "url": "https://en.wikipedia.org/wiki/Washington_Street_Elevated" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611113552/https://en.wikipedia.org/wiki/Orange_Line_(MBTA)", "kind": "wikipedia", "quote": "By 1909, the Washington Street Elevated had been extended south to Forest Hills.", "tier": "tertiary", "title": "Orange Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Orange_Line_(MBTA)" } ] }, { "confidence": "low", "geometryRef": null, "id": "boston-orange-1912", "kind": "extension", "label": { "en": "Green Street infill station opens (Washington Street Elevated)" }, "notes": "Infill station added on the Washington Street Elevated between existing stops, with fewer streetcar connections. [Opening-date chase 2026-06-13] Green Street day-of-month is uncertain: WP prose/citation = Sep 22, 1912; WP stations table = Sep 11, 1912. Year 1912 is firm.", "opened": "1912-09-22", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611113840/https://en.wikipedia.org/wiki/Washington_Street_Elevated", "kind": "wikipedia", "quote": "an infill station at Green Street with fewer streetcar connections was opened on September 22, 1912.", "tier": "tertiary", "title": "Washington Street Elevated — Wikipedia", "url": "https://en.wikipedia.org/wiki/Washington_Street_Elevated" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": null, "id": "boston-orange-1919", "kind": "extension", "label": { "en": "Charlestown Elevated extended: Sullivan Square → Everett" }, "notes": "Northern extension of the Charlestown Elevated to a terminal at Everett, with a drawbridge over the Mystic River. The Everett terminal was built of wood and intended to be temporary. Opened the same year as the Great Molasses Flood (which partially damaged the Atlantic Avenue Elevated). Orange Line article gives '1919'; Everett station article gives March 15, 1919.", "opened": "1919-03-15", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260103112833/https://en.wikipedia.org/wiki/Everett_station_(MBTA)", "kind": "wikipedia", "quote": "Everett station was opened on March 15, 1919, when the Charlestown Elevated segment of the MBTA subway's Orange Line ran from the Canal Street Incline in downtown Boston through Charlestown to a terminal in Everett.", "tier": "tertiary", "title": "Everett station (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Everett_station_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611113552/https://en.wikipedia.org/wiki/Orange_Line_(MBTA)", "kind": "wikipedia", "quote": "In 1919, the same year that the Atlantic Avenue Elevated was partially damaged in Boston's Great Molasses Flood, the Charlestown Elevated was extended north from Sullivan Square to Everett station.", "tier": "tertiary", "title": "Orange Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Orange_Line_(MBTA)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613161220/https://en.wikipedia.org/wiki/Charlestown_Elevated", "kind": "other", "publisher": "Wikipedia", "quote": "Everett station was opened on March 15, 1919.", "tier": "tertiary", "title": "Charlestown Elevated — Wikipedia", "url": "https://en.wikipedia.org/wiki/Charlestown_Elevated", "via": "https://en.wikipedia.org/wiki/Everett_station_(MBTA)" } ], "stationCount": 1 }, { "closed": "1938", "confidence": "medium", "geometryRef": null, "id": "boston-orange-1938", "kind": "extension", "label": { "en": "Atlantic Avenue Elevated (downtown alternate route) fully closed" }, "notes": "Closure (not opening) phase: after a 1928 accident closed the southern portion, the remainder of the Atlantic Avenue Elevated shoreline alternate downtown route closed entirely in 1938, leaving the Washington Street Tunnel subway as the only downtown route for the Main Line. [Opening-date chase 2026-06-13] This phase records a CLOSURE (Atlantic Avenue Elevated last service Sep 30, 1938), not a line opening; 'opened: 1938' reflects the service-change year.", "opened": "1938", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611113552/https://en.wikipedia.org/wiki/Orange_Line_(MBTA)", "kind": "wikipedia", "quote": "In 1938, the remainder of the Atlantic Avenue Elevated was closed, leaving the subway as the only route through downtown.", "tier": "tertiary", "title": "Orange Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Orange_Line_(MBTA)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613161316/https://en.wikipedia.org/wiki/Atlantic_Avenue_Elevated", "kind": "other", "publisher": "Wikipedia", "quote": "The last day of service on the Atlantic Avenue Elevated was September 30, 1938.", "tier": "tertiary", "title": "Atlantic Avenue Elevated — Wikipedia", "url": "https://en.wikipedia.org/wiki/Atlantic_Avenue_Elevated", "via": "https://en.wikipedia.org/wiki/Orange_Line_(MBTA)" } ] }, { "confidence": "low", "constructionStart": "1966", "cost": { "basis": "estimate", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": false, "value": 180000000, "year": 1977 }, "notes": "$180 million for the ENTIRE Haymarket North Extension (all stages 1975–1977), not this stage alone; described as over double the original estimate. Price-year approximate to completion period (mid-1970s). [Citation chase 2026-06-11] The MBTA's own 1977 Annual Report (primary, published after full completion) reports the final cost as $176 million for the entire Haymarket North Extension; the curated $180 million traces to a Boston Globe article dated March 23, 1975 — about two years before completion — and thus reflects a contemporary in-progress estimate rather than the audited final figure.", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611114415/https://en.wikipedia.org/wiki/Haymarket_North_Extension", "kind": "wikipedia", "quote": "April 7, 1975 – Initial segment from Haymarket to Sullivan Square... Stations opened: North Station, Community College, and Sullivan Square. A groundbreaking ceremony occurred on September 22, 1966. The cost was over double original estimates at $180 million.", "tier": "tertiary", "title": "Haymarket North Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/Haymarket_North_Extension" }, { "accessedAt": "2026-06-11", "kind": "primary", "publisher": "Massachusetts Bay Transportation Authority", "quote": "The sixth and last station on the Orange Line's $176 million northern extension was opened for revenue service on March 19 at Oak Grove, Maiden, near the Melrose boundary.", "tier": "primary", "title": "Annual Report 1977 — Massachusetts Bay Transportation Authority", "url": "https://archive.org/details/annualreportmass1977mass/page/n54", "via": "https://en.wikipedia.org/wiki/Haymarket_North_Extension" } ] }, "geometryRef": "boston-Orange", "id": "boston-orange-1975", "kind": "extension", "label": { "en": "Haymarket North Extension Stage 1 opens: Haymarket → Sullivan Square (Charlestown Elevated replaced)" }, "notes": "First stage of the Haymarket North Extension, replacing the closed wooden Charlestown Elevated with a new underground/at-grade alignment. New stations: North Station, Community College, and Sullivan Square (rebuilt). Groundbreaking ceremony was September 22, 1966; the first segment took 8.5 years — twice as long as expected. Cost figure ($180M) covers the entire Haymarket North Extension, not this stage alone. [Date chase 2026-06-12] The September 22, 1966 groundbreaking is attributed by Wikipedia to a 1981 MBTA primary source ('A Chronicle of the Boston Transit System').", "opened": "1975-04-07", "segment": { "fromStopIndex": 4, "toStopIndex": 7 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611114415/https://en.wikipedia.org/wiki/Haymarket_North_Extension", "kind": "wikipedia", "quote": "April 7, 1975 – Initial segment from Haymarket to Sullivan Square... Stations opened: North Station, Community College, and Sullivan Square. A groundbreaking ceremony occurred on September 22, 1966. The cost was over double original estimates at $180 million.", "tier": "tertiary", "title": "Haymarket North Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/Haymarket_North_Extension" } ], "stationCount": 3 }, { "confidence": "low", "geometryRef": "boston-Orange", "id": "boston-orange-1975-2", "kind": "extension", "label": { "en": "Haymarket North Extension Stage 2 opens: Sullivan Square → Wellington" }, "notes": "Second stage, extending across the Mystic River via the new Edward Dana Bridge (which alone cost $9.1 million) to Wellington station.", "opened": "1975-09-06", "segment": { "fromStopIndex": 2, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611114415/https://en.wikipedia.org/wiki/Haymarket_North_Extension", "kind": "wikipedia", "quote": "September 6, 1975 – Extension from Sullivan Square to Wellington station, including the new Edward Dana Bridge crossing the Mystic River.", "tier": "tertiary", "title": "Haymarket North Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/Haymarket_North_Extension" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "boston-Orange", "id": "boston-orange-1975-3", "kind": "extension", "label": { "en": "Haymarket North Extension Stage 3 opens: Wellington → Malden Center" }, "notes": "Third stage, extending to Malden Center station, which also included platforms for the Haverhill Line commuter rail.", "opened": "1975-12-27", "segment": { "fromStopIndex": 1, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611114415/https://en.wikipedia.org/wiki/Haymarket_North_Extension", "kind": "wikipedia", "quote": "December 27, 1975 – Expansion to Malden Center station, which included platforms for the Haverhill Line commuter rail.", "tier": "tertiary", "title": "Haymarket North Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/Haymarket_North_Extension" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "boston-Orange", "id": "boston-orange-1977", "kind": "extension", "label": { "en": "Haymarket North Extension Stage 4 opens: Malden Center → Oak Grove (terminus)" }, "notes": "Final stage of the Haymarket North Extension, opening the northern terminus at Oak Grove in Malden. Wikipedia's Haymarket North Extension article gives March 19, 1977; some secondary summaries give March 20, 1977 — using the March 19 date from the dedicated article. [Opening-date chase 2026-06-13] Oak Grove opening day: March 19, 1977 per current Oak Grove article + Haymarket North Extension + primary 1977 MBTA Annual Report; the 'March 20' figure is from a stale WP revision.", "opened": "1977-03-19", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611114415/https://en.wikipedia.org/wiki/Haymarket_North_Extension", "kind": "wikipedia", "quote": "March 19, 1977 – Terminal segment to Oak Grove station in Malden.", "tier": "tertiary", "title": "Haymarket North Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/Haymarket_North_Extension" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20251228060741/https://en.wikipedia.org/wiki/Oak_Grove_station", "kind": "wikipedia", "quote": "Oak Grove, the sixth and terminal station, opened on March 20, 1977.", "tier": "tertiary", "title": "Oak Grove station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Oak_Grove_station" }, { "accessedAt": "2026-06-13", "kind": "primary", "publisher": "Massachusetts Bay Transportation Authority", "quote": "Cited by Wikipedia's Haymarket North Extension article for March 19, 1977 Oak Grove opening; Oak Grove station article also cites this as supporting March 19 date.", "tier": "primary", "title": "1977 Annual Report — Massachusetts Bay Transportation Authority", "url": "https://archive.org/details/annualreportmass1977mass/page/n54", "via": "https://en.wikipedia.org/wiki/Haymarket_North_Extension" } ], "stationCount": 1 }, { "closed": "1987-04-30", "confidence": "high", "constructionStart": "1979", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": false, "value": 743000000, "year": 1987 }, "notes": "$743 million for the ENTIRE Southwest Corridor Project (Orange Line relocation + commuter rail + linear park), not the rail segment alone; some sources round to ~$750 million for the nine new stations. Funded in part from $600M of cancelled I-95 highway money transferred under the Interstate Highway Option. Construction began 1979. [Citation chase 2026-06-11] The $743M figure is not publicly verifiable in the attached sources: the Railfan article is paywalled (the dollar figure appears only in the paid Sept 2024 issue, and the archived copy is also paywalled), while the Wikipedia and Southwest Corridor Park sources confirm only the service dates and project scope, not the cost. The figure is corroborated in secondary scholarly literature (Altshuler & Luberoff, Mega-Projects, 2003, p.86) as the total Southwest Corridor Project cost, but that source is not currently attached.", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611113840/https://en.wikipedia.org/wiki/Washington_Street_Elevated", "kind": "wikipedia", "quote": "The last service over the Washington Street Elevated ran on April 30, 1987; service began over the Southwest Corridor route on May 4.", "tier": "tertiary", "title": "Washington Street Elevated — Wikipedia", "url": "https://en.wikipedia.org/wiki/Washington_Street_Elevated" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20251206193427/https://railfan.com/mbta-orange-line-a-total-transformation/", "kind": "news", "quote": "The Southwest Corridor Project... cost $743 million... a new MBTA Orange Line relocated along the Corridor, with nine new stations.", "tier": "secondary", "title": "MBTA Orange Line: A Total Transformation — Railfan & Railroad Magazine", "url": "https://railfan.com/mbta-orange-line-a-total-transformation/" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20241015024326/https://southwestcorridorpark.org/history.asp", "kind": "other", "quote": "The new, mostly submerged, Orange Line was opened in 1987... May 1987: New Orange Line opens. ...construction started in 1979.", "tier": "secondary", "title": "Southwest Corridor Park — History", "url": "https://southwestcorridorpark.org/history.asp" } ] }, "geometryRef": "boston-Orange", "id": "boston-orange-1987", "kind": "extension", "label": { "en": "Southwest Corridor relocation: Washington Street Elevated closed (Apr 30), Orange Line rerouted onto new Southwest Corridor (Chinatown → Forest Hills)" }, "notes": "The deteriorating elevated Washington Street Elevated was demolished and the southern Orange Line relocated west onto the Southwest Corridor — a depressed/cut-and-cover alignment on land originally reserved for the cancelled Interstate 95. Last Washington Street Elevated service ran April 30, 1987; new Southwest Corridor service began May 4, 1987. The project built new stations along the corridor (Back Bay, Massachusetts Avenue, Ruggles, Roxbury Crossing, Jackson Square, Stony Brook, Green Street, Forest Hills, plus tie-ins) — sources state nine new stations. This is both a closure of the old elevated branch and an opening of the relocated route; categorized as extension/relocation. [Date chase 2026-06-12] Southwest Corridor Park history page directly states construction started in 1979 after nine years of planning; corroborated by the Washington Street Elevated article.", "opened": "1987-05-04", "segment": { "fromStopIndex": 10, "toStopIndex": 19 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611113840/https://en.wikipedia.org/wiki/Washington_Street_Elevated", "kind": "wikipedia", "quote": "The last service over the Washington Street Elevated ran on April 30, 1987; service began over the Southwest Corridor route on May 4.", "tier": "tertiary", "title": "Washington Street Elevated — Wikipedia", "url": "https://en.wikipedia.org/wiki/Washington_Street_Elevated" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20251206193427/https://railfan.com/mbta-orange-line-a-total-transformation/", "kind": "news", "quote": "The Southwest Corridor Project... cost $743 million... a new MBTA Orange Line relocated along the Corridor, with nine new stations.", "tier": "secondary", "title": "MBTA Orange Line: A Total Transformation — Railfan & Railroad Magazine", "url": "https://railfan.com/mbta-orange-line-a-total-transformation/" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20241015024326/https://southwestcorridorpark.org/history.asp", "kind": "other", "quote": "The new, mostly submerged, Orange Line was opened in 1987... May 1987: New Orange Line opens. ...construction started in 1979.", "tier": "secondary", "title": "Southwest Corridor Park — History", "url": "https://southwestcorridorpark.org/history.asp" } ], "stationCount": 9 }, { "confidence": "medium", "cost": { "basis": "budget", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": false, "value": 57000000, "year": 2014 }, "notes": "$57 million for the Assembly infill station, per the Orange Line Wikipedia article. [Citation chase 2026-06-11] Per the Boston Globe (Oct 6, 2011), the $57 million is the total design and construction budget for the single Assembly infill station, approved at the 2011 MBTA board contract stage; the figure is a ~2011 budget rather than a verified 2014 final outturn.", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611113552/https://en.wikipedia.org/wiki/Orange_Line_(MBTA)", "kind": "wikipedia", "quote": "Assembly station, an infill station, cost $57 million and opened September 2, 2014—the first new station on the MBTA subway system since 1987.", "tier": "tertiary", "title": "Orange Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Orange_Line_(MBTA)" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20260613161457/https://www.boston.com/", "kind": "news", "publisher": "Boston Globe", "quote": "That station, with a total design and construction budget of $57 million, is considered the linchpin in a $1.5 billion plan to remake the long-abandoned, 65-acre site of a Ford Motor Co., assembly plant into a new neighborhood on the Somerville-Charlestown line", "tier": "secondary", "title": "MBTA board OK's millions for stations", "url": "https://web.archive.org/web/20120527221928/http://articles.boston.com/2011-10-06/news/30253264_1_blue-line-orange-line-red-line", "via": "https://en.wikipedia.org/wiki/Orange_Line_(MBTA)" } ] }, "geometryRef": null, "id": "boston-orange-2014", "kind": "extension", "label": { "en": "Assembly infill station opens (between Sullivan Square and Wellington)" }, "notes": "First new station on the MBTA subway system since 1987; an infill station on the Haymarket North Extension segment serving the Assembly Row development. [Opening-date chase 2026-06-13] Opened to passengers Sep 2, 2014; some finishing construction continued until November 2014.", "opened": "2014-09-02", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611113552/https://en.wikipedia.org/wiki/Orange_Line_(MBTA)", "kind": "wikipedia", "quote": "Assembly station, an infill station, cost $57 million and opened September 2, 2014—the first new station on the MBTA subway system since 1987.", "tier": "tertiary", "title": "Orange Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Orange_Line_(MBTA)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613161307/https://en.wikipedia.org/wiki/Assembly_(MBTA_station)", "kind": "other", "publisher": "Wikipedia", "quote": "The station opened to passengers on September 2, 2014, although some final construction work lasted until November.", "tier": "tertiary", "title": "Assembly station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Assembly_(MBTA_station)", "via": "https://en.wikipedia.org/wiki/Orange_Line_(MBTA)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613161455/https://en.wikipedia.org/wiki/Haymarket_North_Extension", "kind": "other", "publisher": "Wikipedia", "quote": "Assembly station opened on September 2, 2014. It was the first fully new station on the MBTA subway system since 1987.", "tier": "tertiary", "title": "Haymarket North Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/Haymarket_North_Extension", "via": "https://en.wikipedia.org/wiki/Haymarket_North_Extension" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611113552/https://en.wikipedia.org/wiki/Orange_Line_(MBTA)", "kind": "wikipedia", "quote": "The Main Line of the electric Boston Elevated Railway opened in segments, starting in 1901.", "tier": "tertiary", "title": "Orange Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Orange_Line_(MBTA)" } ] }, { "cityId": "boston", "color": "#003DA5", "displayNumber": "Blue", "id": "boston-line-Blue", "name": { "en": "Blue Line" }, "phases": [ { "confidence": "medium", "constructionStart": "1900", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": false, "value": 3000000, "year": 1904 }, "notes": "Cost of the original East Boston Tunnel excavation. Built as a STREETCAR tunnel (converted to heavy rail only in 1924); first North American subway tunnel beneath a body of water. Construction took 2.5 years. [Citation chase 2026-06-11] The $3M figure is a single round summary attributed to one primary source — Cudahy, \"Change at Park Street Under\" (1972), p. 30 — which is borrow-restricted on the Internet Archive and could not be verified verbatim; Wikipedia is the only readable corroboration.", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260504150755/https://en.wikipedia.org/wiki/Blue_Line_(MBTA)", "kind": "wikipedia", "quote": "the first North American subway tunnel to run beneath a body of water when it opened in 1904", "tier": "tertiary", "title": "Blue Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Blue_Line_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20251008041416/https://en.wikipedia.org/wiki/East_Boston_Tunnel", "kind": "wikipedia", "quote": "from Maverick Square in East Boston to downtown Boston's Court Street station, with an intermediate stop at Devonshire (now State). The excavation took two-and-a-half years, and cost $3 million and the lives of four workmen.", "tier": "tertiary", "title": "East Boston Tunnel — Wikipedia", "url": "https://en.wikipedia.org/wiki/East_Boston_Tunnel" }, { "accessedAt": "2026-06-11", "kind": "other", "publisher": "S. Greene Press (Brattleboro, VT)", "tier": "primary", "title": "Change at Park Street Under: The Story of Boston's Subways, p. 30", "url": "https://archive.org/details/changeatparkstre00cuda/page/31", "via": "https://en.wikipedia.org/wiki/Blue_Line_(MBTA)" } ] }, "geometryRef": "boston-Blue", "id": "boston-blue-1904", "kind": "initial", "label": { "en": "East Boston Tunnel opens: Maverick Square (East Boston) → Court Street (downtown Boston), with intermediate stop at Devonshire (now State) — streetcar subway" }, "notes": "[Date chase 2026-06-12] BTC annual report (year ending June 30, 1904) and MassHist both date construction start to 5 May 1900; curated 1902 likely reflects the 2.5-year under-harbor excavation window, not project start. Construction-start corrected 1902→1900 [Date chase 2026-06-12 — panel-confirmed, corrected w/ sign-off] [Opening-date chase 2026-06-13] December 30, 1904 was the public/revenue-service opening of the East Boston Tunnel (streetcar subway from Court Street to Maverick portal); no ceremonial-vs-public distinction noted.", "opened": "1904-12-30", "segment": { "from": [ -71.0395, 42.3691 ], "to": [ -71.0578, 42.3587 ] }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260504150755/https://en.wikipedia.org/wiki/Blue_Line_(MBTA)", "kind": "wikipedia", "quote": "the first North American subway tunnel to run beneath a body of water when it opened in 1904", "tier": "tertiary", "title": "Blue Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Blue_Line_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20251008041416/https://en.wikipedia.org/wiki/East_Boston_Tunnel", "kind": "wikipedia", "quote": "from Maverick Square in East Boston to downtown Boston's Court Street station, with an intermediate stop at Devonshire (now State). The excavation took two-and-a-half years, and cost $3 million and the lives of four workmen.", "tier": "tertiary", "title": "East Boston Tunnel — Wikipedia", "url": "https://en.wikipedia.org/wiki/East_Boston_Tunnel" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260611054208/https://en.wikipedia.org/wiki/Aquarium_station_(MBTA)", "kind": "other", "publisher": "Wikipedia", "quote": "The East Boston Tunnel opened on December 30, 1904, serving streetcars which ran between Court Street downtown and Maverick portal in East Boston.", "tier": "tertiary", "title": "Aquarium station (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Aquarium_station_(MBTA)", "via": "https://en.wikipedia.org/wiki/Blue_Line_(MBTA)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260611054210/https://en.wikipedia.org/wiki/State_station", "kind": "other", "publisher": "Wikipedia", "quote": "The Blue Line section of the station was built along with the rest of the East Boston Tunnel in the first years of the 20th century and opened on December 30, 1904, serving streetcars running from downtown to East Boston.", "tier": "tertiary", "title": "State station — Wikipedia", "url": "https://en.wikipedia.org/wiki/State_station", "via": "https://en.wikipedia.org/wiki/Blue_Line_(MBTA)" } ], "stationCount": 4 }, { "confidence": "medium", "geometryRef": null, "id": "boston-blue-1906", "kind": "extension", "label": { "en": "Atlantic station (now Aquarium) opens as intermediate stop in the East Boston Tunnel" }, "notes": "[Opening-date chase 2026-06-13] Sources specify April 5, 1906 (Atlantic Avenue station, now Aquarium), citing the 12th Annual Report of the Boston Transit Commission; the curated year-only date could be tightened to 1906-04-05.", "opened": "1906", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260504150755/https://en.wikipedia.org/wiki/Blue_Line_(MBTA)", "kind": "wikipedia", "quote": "In 1906, Atlantic Station (now Aquarium) was opened", "tier": "tertiary", "title": "Blue Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Blue_Line_(MBTA)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260611054208/https://en.wikipedia.org/wiki/Aquarium_station_(MBTA)", "kind": "other", "publisher": "Wikipedia", "quote": "Atlantic Avenue station opened in the tunnel on April 5, 1906. Construction of the intermediate station at Atlantic Avenue under the Elevated was delayed; it opened on April 5, 1906.", "tier": "tertiary", "title": "Aquarium station (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Aquarium_station_(MBTA)", "via": "https://en.wikipedia.org/wiki/Blue_Line_(MBTA)" } ], "stationCount": 1 }, { "confidence": "high", "constructionStart": "1912", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": false, "value": 2400000, "year": 1916 }, "notes": "Total cost of the 0.5-mile (0.8 km) Bowdoin extension. Construction began November 29, 1912; Court Street station was abandoned November 15, 1914 (service cut back to Devonshire) and replaced by the new Scollay Under platform. New terminal station/loop at Bowdoin Square. [Citation chase 2026-06-11] The $2.4 million total derives from a Boston Globe report (March 18, 1916) and represents the reported actual cost; the 1915 Boston Transit Commission Annual Report separately lists authorized debt of $2,450,000 for the East Boston Tunnel Extension, roughly consistent. The underlying Globe source is paywalled and could not be independently verified.", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20251008041416/https://en.wikipedia.org/wiki/East_Boston_Tunnel", "kind": "wikipedia", "quote": "from Scollay Square (where a new platform, Scollay Under, was constructed to replace Court Street station) to a new station and loop at Bowdoin Square. ... The total cost of the extension was $2.4 million.", "tier": "tertiary", "title": "East Boston Tunnel — Wikipedia", "url": "https://en.wikipedia.org/wiki/East_Boston_Tunnel" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260504150755/https://en.wikipedia.org/wiki/Blue_Line_(MBTA)", "kind": "wikipedia", "quote": "Bowdoin station opened on March 18 along with the Joy Street Portal", "tier": "tertiary", "title": "Blue Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Blue_Line_(MBTA)" } ] }, "geometryRef": "boston-Blue", "id": "boston-blue-1916", "kind": "extension", "label": { "en": "Bowdoin extension opens: Scollay Square (new Scollay Under platform) → Bowdoin Square + Joy Street Portal (Court Street closed 1914)" }, "notes": "[Date chase 2026-06-12] BTC Annual Report 1913 p.46 corroborates the November 29, 1912 construction start (underpinning at Scollay Square in progress). [Opening-date chase 2026-06-13] March 13, 1916 saw service extended to the new Scollay Under platform with streetcars looping empty around Bowdoin; March 18, 1916 was the actual public/revenue passenger opening of Bowdoin.", "opened": "1916-03-18", "segment": { "from": [ -71.0578, 42.3587 ], "to": [ -71.062, 42.3614 ] }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20251008041416/https://en.wikipedia.org/wiki/East_Boston_Tunnel", "kind": "wikipedia", "quote": "from Scollay Square (where a new platform, Scollay Under, was constructed to replace Court Street station) to a new station and loop at Bowdoin Square. ... The total cost of the extension was $2.4 million.", "tier": "tertiary", "title": "East Boston Tunnel — Wikipedia", "url": "https://en.wikipedia.org/wiki/East_Boston_Tunnel" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260504150755/https://en.wikipedia.org/wiki/Blue_Line_(MBTA)", "kind": "wikipedia", "quote": "Bowdoin station opened on March 18 along with the Joy Street Portal", "tier": "tertiary", "title": "Blue Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Blue_Line_(MBTA)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260613161408/https://archive.org/details/annualreportofbo19bost?view=theater", "kind": "primary", "publisher": "Boston Transit Commission", "quote": "The work thus far done upon the extension of the East Boston tunnel has been in underpinning the buildings and the present station in Scollay square, a work of considerable difficulty.", "tier": "primary", "title": "Annual report of the Boston Transit Commission for the year ending June 30, 1913 — page 46", "url": "https://archive.org/stream/annualreportofbo19bost#page/46/mode/2up", "via": "https://en.wikipedia.org/wiki/Blue_Line_(MBTA)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260216020000/https://en.wikipedia.org/wiki/Bowdoin_station", "kind": "other", "publisher": "Wikipedia", "quote": "Bowdoin station opened on March 18, 1916 with actual passenger service. On March 13, 1916, service was extended to the new Scollay Under, with streetcars looping empty around the Bowdoin loop.", "tier": "tertiary", "title": "Bowdoin station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bowdoin_station", "via": "https://en.wikipedia.org/wiki/Blue_Line_(MBTA)" }, { "accessedAt": "2026-06-13", "kind": "news", "publisher": "Boston Globe / Newspapers.com", "tier": "secondary", "title": "Few Used New Bowdoin Sq Tunnel Immediately After its Opening — Boston Globe, March 18, 1916", "url": "https://www.newspapers.com/clip/53079017/the-boston-globe/", "via": "https://en.wikipedia.org/wiki/Blue_Line_(MBTA)" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": null, "id": "boston-blue-1924", "kind": "renumber", "label": { "en": "East Boston Tunnel converted from streetcar to heavy-rail rapid transit (high-floor metro trains), Bowdoin → Maverick" }, "notes": "[Opening-date chase 2026-06-13] April 21, 1924 is the revenue-service start (end of the April 18-21 conversion weekend), using temporary wooden platforms; permanent concrete platforms followed over the next months.", "opened": "1924-04-21", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20251008041416/https://en.wikipedia.org/wiki/East_Boston_Tunnel", "kind": "wikipedia", "quote": "Over the weekend of April 18–21, 1924, the East Boston Tunnel was converted to use the new high-floor trains", "tier": "tertiary", "title": "East Boston Tunnel — Wikipedia", "url": "https://en.wikipedia.org/wiki/East_Boston_Tunnel" } ] }, { "confidence": "medium", "constructionStart": "1948", "geometryRef": "boston-Blue", "id": "boston-blue-1952", "kind": "extension", "label": { "en": "Revere extension phase 1 opens: Maverick → Orient Heights along the former Boston, Revere Beach & Lynn Railroad — new stations Airport, Wood Island, Orient Heights" }, "notes": "[Date chase 2026-06-12] BRB&L Wikipedia (citing Cheney 2003) dates construction start to October 1948; curated 1952 is the phase-1 opening year, not construction start. Construction-start corrected 1952→1948 [Date chase 2026-06-12 — panel-confirmed, corrected w/ sign-off] [Opening-date chase 2026-06-13] January 5, 1952 was the public/revenue opening; station-level sources cite Belcher's BSRA 'Changes to Transit Service in the MBTA district'.", "opened": "1952-01-05", "segment": { "from": [ -71.0395, 42.3691 ], "to": [ -71.0067, 42.3868 ] }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260403152059/https://en.wikipedia.org/wiki/Airport_station_(MBTA)", "kind": "wikipedia", "quote": "The Metropolitan Transit Authority (MTA) opened the first phase of the Revere Extension on January 5, 1952, with new stations at Airport, Wood Island, and Orient Heights.", "tier": "tertiary", "title": "Airport station (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Airport_station_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260504150755/https://en.wikipedia.org/wiki/Blue_Line_(MBTA)", "kind": "wikipedia", "quote": "From 1952 to 1954, a surface-level extension was constructed along the recently defunct Boston, Revere Beach and Lynn Railroad, from Maverick to the current terminus at Wonderland.", "tier": "tertiary", "title": "Blue Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Blue_Line_(MBTA)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260312170054/https://en.wikipedia.org/wiki/Orient_Heights_station", "kind": "other", "publisher": "Wikipedia", "quote": "The first part of the Revere Extension opened to Orient Heights on January 5, 1952, with intermediate stations at Airport and Day Square.", "tier": "tertiary", "title": "Orient Heights station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Orient_Heights_station", "via": "https://en.wikipedia.org/wiki/Blue_Line_(MBTA)" } ], "stationCount": 3 }, { "confidence": "low", "geometryRef": "boston-Blue", "id": "boston-blue-1952-2", "kind": "extension", "label": { "en": "Revere extension: Suffolk Downs station opens (Orient Heights → Suffolk Downs)" }, "notes": "[Opening-date chase 2026-06-13] Suffolk Downs opened April 21, 1952 (first day of the racing season) as a seasonal, single-track/single-platform station; it became year-round on June 19, 1954 with a second platform.", "opened": "1952-04-21", "segment": { "from": [ -71.0067, 42.3868 ], "to": [ -70.9966, 42.3902 ] }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260129142317/https://en.wikipedia.org/wiki/Suffolk_Downs_station", "kind": "wikipedia", "quote": "Suffolk Downs station opened on April 21, 1952.", "tier": "tertiary", "title": "Suffolk Downs station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Suffolk_Downs_station" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "boston-Blue", "id": "boston-blue-1954", "kind": "extension", "label": { "en": "Revere extension phase 2 opens: Suffolk Downs → Wonderland — new stations Beachmont, Revere Beach, Wonderland (terminus)" }, "notes": "DATE CONFLICT: station infoboxes (Wonderland, Beachmont, Revere Beach — Wikipedia) and the body text consistently give June 19, 1954; the Blue Line main-article station TABLE and Wikidata give January 19, 1954. Using the widely-supported June 19, 1954 from the station articles and recording the discrepancy. The extension was 'cut short due to limited funds' — it was intended to reach Lynn but terminated at Wonderland. [Opening-date chase 2026-06-13] June 19, 1954 confirmed by multiple station articles citing the Boston Globe ('Rapid Transit Line to Revere to Open June 19', June 9, 1954); a stray 'January 1954' in passing Wikipedia text is an editorial error contradicted by all sourced dates.", "opened": "1954-06-19", "segment": { "from": [ -70.9966, 42.3902 ], "to": [ -70.9919, 42.4135 ] }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260508063316/https://en.wikipedia.org/wiki/Wonderland_station", "kind": "wikipedia", "quote": "the second phase (cut short due to limited funds) opened to Wonderland on June 19, 1954", "tier": "tertiary", "title": "Wonderland station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Wonderland_station" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260109190546/https://en.wikipedia.org/wiki/Revere_Beach_station", "kind": "wikipedia", "quote": "the second phase (cut short due to limited funds) opened to Wonderland on June 19, 1954 with intermediate stations at Beachmont and Revere Beach.", "tier": "tertiary", "title": "Revere Beach station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Revere_Beach_station" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260418201248/https://en.wikipedia.org/wiki/Beachmont_station", "kind": "other", "publisher": "Wikipedia", "quote": "Beachmont station opened on June 19, 1954 as part of the second phase of the Revere Extension.", "tier": "tertiary", "title": "Beachmont station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Beachmont_station", "via": "https://en.wikipedia.org/wiki/Blue_Line_(MBTA)" } ], "stationCount": 3 }, { "confidence": "low", "geometryRef": null, "id": "boston-blue-1965", "kind": "renumber", "label": { "en": "Route renamed 'Blue Line' under MBTA color-based rebranding (previously 'East Boston Tunnel & Revere Extension' / Route 3)" }, "notes": "[Opening-date chase 2026-06-13] August 26, 1965 marks the renaming to 'Blue Line' under the MBTA color rebranding (not a physical opening); only Wikipedia attests this date, no primary government source located.", "opened": "1965-08-26", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260504150755/https://en.wikipedia.org/wiki/Blue_Line_(MBTA)", "kind": "wikipedia", "quote": "It was renamed as the Blue Line on August 26, 1965, as part of the new MBTA's color-based rebranding.", "tier": "tertiary", "title": "Blue Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Blue_Line_(MBTA)" } ] } ], "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260504150755/https://en.wikipedia.org/wiki/Blue_Line_(MBTA)", "kind": "wikipedia", "quote": "the first North American subway tunnel to run beneath a body of water when it opened in 1904", "tier": "tertiary", "title": "Blue Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Blue_Line_(MBTA)" } ] }, { "cityId": "boston", "color": "#00843D", "displayNumber": "Green-B", "id": "boston-line-Green-B", "name": { "en": "Green Line B Branch" }, "phases": [ { "confidence": "medium", "geometryRef": "boston-Green-B", "id": "boston-green-b-1896", "kind": "initial", "label": { "en": "Commonwealth Avenue streetcar service opens: Lake Street → downtown Boston (Boston Elevated Railway)" }, "notes": "Origin of the line as a streetcar route on Commonwealth Avenue; predates the 'B branch' designation by 71 years. Lake Street (later Boston College) is the western terminus that the branch still uses today.", "opened": "1896-08-15", "segment": { "fromStopIndex": 0, "toStopIndex": 16 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260609060913/https://en.wikipedia.org/wiki/Green_Line_B_branch", "kind": "wikipedia", "quote": "Service between Lake Street and downtown Boston began on August 15, 1896.", "tier": "tertiary", "title": "Green Line B branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_B_branch" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260311032543/https://en.wikipedia.org/wiki/Boston_College_station", "kind": "wikipedia", "quote": "On August 15, 1896, the Boston Elevated Railway (BERy) added tracks on newly constructed Commonwealth Avenue from the Newton town line east to Chestnut Hill Avenue", "tier": "tertiary", "title": "Boston College station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Boston_College_station" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20200917172003/https://www.newspapers.com/clip/53147423/the-boston-globe/", "kind": "news", "publisher": "Boston Globe / Newspapers.com", "quote": "[Cited in wikitext as the primary reference for the August 15, 1896 opening; behind Newspapers.com paywall — could not access full text]", "tier": "secondary", "title": "Newton — Boston Globe, August 15, 1896, p. 3", "url": "https://www.newspapers.com/clip/53147423/the-boston-globe/", "via": "https://en.wikipedia.org/wiki/Green_Line_B_branch" } ] }, { "confidence": "medium", "geometryRef": "boston-Green-B", "id": "boston-green-b-1897", "kind": "extension", "label": { "en": "Streetcars rerouted into Tremont Street Subway to Park Street (subway integration)" }, "notes": "The Tremont Street Subway (opened 1 Sept 1897) is the oldest subway in the US; it is shared trunk infrastructure used by all Green Line branches, not exclusive to the B branch. [Opening-date chase 2026-06-13] Curated 1897-09-01 is the Tremont Street subway opening date; the Lake Street/Nonantum Square streetcars were rerouted into the subway 'soon after' that opening, not necessarily on exactly Sept 1.", "opened": "1897-09-01", "segment": { "fromStopIndex": 20, "toStopIndex": 22 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260609060913/https://en.wikipedia.org/wiki/Green_Line_B_branch", "kind": "wikipedia", "quote": "Both the Nonantum Square and Lake Street lines were rerouted into the Tremont Street subway to terminate at Park Street station soon after the tunnel's September 1, 1897 opening.", "tier": "tertiary", "title": "Green Line B branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_B_branch" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260531233717/https://en.wikipedia.org/wiki/Tremont_Street_subway", "kind": "other", "publisher": "Wikipedia", "quote": "opening on September 1, 1897. A contemporary source from the Boston Daily Globe is cited with the headline 'First Car off the Earth: Allston Electric Goes into the subway on schedule time,' published on September 1, 1897", "tier": "tertiary", "title": "Tremont Street subway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Tremont_Street_subway", "via": "https://en.wikipedia.org/wiki/Green_Line_B_branch" } ] }, { "confidence": "low", "geometryRef": null, "id": "boston-green-b-1900", "kind": "extension", "label": { "en": "Commonwealth Avenue tracks completed Chestnut Hill Ave → Packards Corner; Lake Street becomes Commonwealth Ave line terminus" }, "notes": "Completed the modern Commonwealth Avenue alignment of the present-day B branch, giving direct Lake Street → downtown service via Commonwealth Avenue.", "opened": "1900-05-26", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260609060913/https://en.wikipedia.org/wiki/Green_Line_B_branch", "kind": "wikipedia", "quote": "The BERy opened new tracks on Commonwealth Avenue from Chestnut Hill Avenue to Brighton Avenue on May 26, 1900, allowing direct service from Lake Street to downtown via Commonwealth Avenue.", "tier": "tertiary", "title": "Green Line B branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_B_branch" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260311032543/https://en.wikipedia.org/wiki/Boston_College_station", "kind": "wikipedia", "quote": "On May 26, 1900, tracks on Commonwealth Avenue were completed from Chestnut Hill Avenue to Packards Corner, at which point Lake Street became the terminus of the Commonwealth Avenue line", "tier": "tertiary", "title": "Boston College station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Boston_College_station" } ] }, { "confidence": "medium", "geometryRef": "boston-Green-B", "id": "boston-green-b-1914", "kind": "extension", "label": { "en": "Boylston Street Subway opens (extension of Tremont St subway toward Kenmore/Governors Square)" }, "notes": "Shared trunk infrastructure used by multiple Green Line branches, not exclusive to the B branch. Added Copley Square and Massachusetts Avenue (now Hynes Convention Center) stops.", "opened": "1914-10-03", "segment": { "fromStopIndex": 16, "toStopIndex": 20 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260609060913/https://en.wikipedia.org/wiki/Green_Line_B_branch", "kind": "wikipedia", "quote": "The Boylston Street subway opened on October 3, 1914, acting as an extension of the Tremont Street subway to just east of Governors Square, with intermediate stops at Copley Square and Massachusetts Avenue.", "tier": "tertiary", "title": "Green Line B branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_B_branch" }, { "accessedAt": "2026-06-13", "kind": "news", "publisher": "Boston Globe / Newspapers.com", "quote": "[Cited in wikitext as reference for Oct 3, 1914 Boylston Street subway opening; behind Newspapers.com paywall — could not access full text. Article dated Oct 1 may be a preview article two days before the opening.]", "tier": "secondary", "title": "Changes Made by New Subway — Boston Globe, October 1, 1914, p. 3", "url": "https://www.newspapers.com/clip/54438602/the-boston-globe/", "via": "https://en.wikipedia.org/wiki/Green_Line_B_branch" } ], "stationCount": 2 }, { "confidence": "medium", "geometryRef": null, "id": "boston-green-b-1932", "kind": "extension", "label": { "en": "Kenmore subway opens with separate Blandford Street (Commonwealth Ave) and St. Mary's Street (Beacon St) portals" }, "notes": "The Blandford Street portal is the dedicated subway portal of the present-day B branch (where it enters the tunnel from Commonwealth Avenue). Wikipedia reports the Kenmore subway was projected at roughly $5 million but gives no sourced final outturn figure attributable to the B-branch alignment specifically, so cost is omitted.", "opened": "1932-10-23", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260609060913/https://en.wikipedia.org/wiki/Green_Line_B_branch", "kind": "wikipedia", "quote": "Kenmore station and the new subway, which split to separate portals at Saint Mary's Street on Beacon Street and Blandford Street on Commonwealth Avenue, opened on October 23, 1932.", "tier": "tertiary", "title": "Green Line B branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_B_branch" }, { "accessedAt": "2026-06-13", "kind": "primary", "publisher": "Boston Elevated Railway", "quote": "[Cited in wikitext as primary reference for October 23, 1932 opening of Kenmore station and subway; Internet Archive copy cited — not independently fetched but a primary operator document]", "tier": "primary", "title": "Annual report of the public trustees of the Boston Elevated Railway (14th edition), p. 14", "url": "https://archive.org/details/annualreportofpu32bost", "via": "https://en.wikipedia.org/wiki/Green_Line_B_branch" } ] }, { "confidence": "low", "geometryRef": null, "id": "boston-green-b-1965", "kind": "renumber", "label": { "en": "Streetcar routes feeding the Tremont Street subway rebranded as the Green Line" }, "notes": "Branding/identity change (no new construction): the Commonwealth Avenue / Boston College streetcar route became part of the MBTA Green Line.", "opened": "1965-08-26", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260609060913/https://en.wikipedia.org/wiki/Green_Line_B_branch", "kind": "wikipedia", "quote": "As part of systemwide rebranding efforts, the remaining streetcar routes feeding the Tremont Street subway became the Green Line on August 26, 1965.", "tier": "tertiary", "title": "Green Line B branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_B_branch" } ] }, { "confidence": "low", "geometryRef": null, "id": "boston-green-b-1967", "kind": "renumber", "label": { "en": "Green Line branches lettered; the Boston College (Commonwealth Avenue) line becomes the 'B' branch" }, "notes": "Designation change only: this is the point at which the line formally became 'Green Line B branch'. No exact date documented beyond the year 1967.", "opened": "1967", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260609060913/https://en.wikipedia.org/wiki/Green_Line_B_branch", "kind": "wikipedia", "quote": "In 1967, the five branches were given letters to distinguish them; the Boston College line became the B branch.", "tier": "tertiary", "title": "Green Line B branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_B_branch" } ] }, { "closed": "2004-04-20", "confidence": "medium", "geometryRef": null, "id": "boston-green-b-2005", "kind": "renumber", "label": { "en": "Four low-ridership surface stops closed (Greycliff Rd, Mount Hood Rd, Summit Ave, Fordham Rd) — pilot, made permanent 2005" }, "notes": "Stop consolidation, not a reopening: four close-spaced surface stops were closed (pilot from 20 Apr 2004) and the closures were made permanent on 15 Mar 2005. 'opened' field used to record the permanent-removal date; 'closed' records the start of the pilot closure. stationCount reflects a reduction of four, not an addition. [Opening-date chase 2026-06-13] The four stops (Greycliff Rd, Mount Hood Rd, Summit Ave, Fordham Rd) were physically closed April 20, 2004 as a 6-8 month pilot; the curated 2005-03-15 date is the MBTA board vote that made the closures permanent, confirmed by the Boston Globe.", "opened": "2005-03-15", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260609060913/https://en.wikipedia.org/wiki/Green_Line_B_branch", "kind": "wikipedia", "quote": "On April 20, 2004, the other four stops were closed as a 6-to-8-month pilot program", "tier": "tertiary", "title": "Green Line B branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_B_branch" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260609060913/https://en.wikipedia.org/wiki/Green_Line_B_branch", "kind": "wikipedia", "quote": "On March 15, 2005, after a survey showed that 73% of 1,142 riders surveyed approved of the closures, the MBTA board voted to make the closures permanent.", "tier": "tertiary", "title": "Green Line B branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_B_branch" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260528230727/http://archive.boston.com/news/local/articles/2005/03/16/t_drops_4_green_line_stops_after_results_of_rider_survey/", "kind": "news", "publisher": "Boston Globe", "quote": "The MBTA decided yesterday to permanently eliminate four stops on the traditionally slow B branch of the Green Line after a survey that some had hoped would save the stops backfired.", "tier": "secondary", "title": "T drops 4 Green Line stops after results of rider survey — Boston Globe, March 16, 2005", "url": "http://archive.boston.com/news/local/articles/2005/03/16/t_drops_4_green_line_stops_after_results_of_rider_survey/", "via": "https://en.wikipedia.org/wiki/Green_Line_B_branch" } ] }, { "confidence": "high", "constructionStart": "2021-02", "cost": { "basis": "budget", "confidence": "high", "nominal": { "currency": "USD", "isEstimate": false, "value": 17800000, "year": 2020 }, "notes": "Construction contract awarded 23 March 2020 for the B Branch Station Consolidation project, which replaced four close-spaced surface stops with two accessible stations (Babcock Street and Amory Street). [Citation chase 2026-06-11] This $17.8M ($17,768,400 exactly) is the construction contract award to MAS Building and Bridge, Inc.; the full B Branch Station Consolidation Project budget was $29,278,291 per the MBTA press release.", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260609060913/https://en.wikipedia.org/wiki/Green_Line_B_branch", "kind": "wikipedia", "quote": "The two new stations, Babcock Street and Amory Street, opened on November 15, 2021.", "tier": "tertiary", "title": "Green Line B branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_B_branch" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260609060913/https://en.wikipedia.org/wiki/Green_Line_B_branch", "kind": "wikipedia", "quote": "The MBTA awarded a $17.8 million construction contract on March 23, 2020.", "tier": "tertiary", "title": "Green Line B branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_B_branch" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20250823094348/https://www.mbta.com/news/2020-03-23/fmcb-awards-178-million-b-branch-station-consolidation-work", "kind": "primary", "publisher": "Massachusetts Bay Transportation Authority", "quote": "MAS Building and Bridge, Inc. was today awarded a total of $17,768,400 with the B branch Station Consolidation Project budget totaling $29,278,291.", "tier": "secondary", "title": "FMCB Awards $17.8 Million for B Branch Station Consolidation Work", "url": "https://mbta.com/news/2020-03-23/fmcb-awards-178-million-b-branch-station-consolidation-work", "via": "https://en.wikipedia.org/wiki/Green_Line_B_branch" } ] }, "geometryRef": null, "id": "boston-green-b-2021", "kind": "renumber", "label": { "en": "BU-area station consolidation: four close-spaced stops replaced by two new stations, Babcock Street & Amory Street" }, "notes": "Net station consolidation: four old stops removed, two new accessible stations built (net reduction of two). stationCount=2 records the two newly built stations. Construction began 2020 (contract awarded 23 Mar 2020); stations opened 15 Nov 2021. [Date chase 2026-06-12] Construction contract awarded 2020-03-23; the originally projected fall-2020 start slipped and actual construction began February 2021 per MBTA's March 31, 2021 press release. Construction-start corrected 2020→2021-02 [Date chase 2026-06-12 — panel-confirmed, corrected w/ sign-off]", "opened": "2021-11-15", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260609060913/https://en.wikipedia.org/wiki/Green_Line_B_branch", "kind": "wikipedia", "quote": "The two new stations, Babcock Street and Amory Street, opened on November 15, 2021.", "tier": "tertiary", "title": "Green Line B branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_B_branch" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260609060913/https://en.wikipedia.org/wiki/Green_Line_B_branch", "kind": "wikipedia", "quote": "The MBTA awarded a $17.8 million construction contract on March 23, 2020.", "tier": "tertiary", "title": "Green Line B branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_B_branch" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260613161522/https://cdn.mbta.com/sites/default/files/2021-01/2021-01-28-glt-b-branch-station-consolidation-meeting-presentation.pdf", "kind": "primary", "publisher": "Massachusetts Bay Transportation Authority", "quote": "Construction was to last from February 2021 to early 2022, with night and weekend bustitution for much of 2021.", "tier": "primary", "title": "B Branch Station Consolidation Project: Virtual Public Meeting", "url": "https://cdn.mbta.com/sites/default/files/2021-01/2021-01-28-glt-b-branch-station-consolidation-meeting-presentation.pdf", "via": "https://en.wikipedia.org/wiki/Green_Line_B_branch" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20250901220641/https://www.mbta.com/news/2021-03-31/building-better-t-green-line-b-branch-station-consolidation-project-work-taking", "kind": "primary", "publisher": "Massachusetts Bay Transportation Authority", "quote": "Construction began in February 2021 with an anticipated completion in late 2021.", "tier": "primary", "title": "Building a Better T: Green Line B Branch Station Consolidation Project Work Taking Place", "url": "https://www.mbta.com/news/2021-03-31/building-better-t-green-line-b-branch-station-consolidation-project-work-taking", "via": "https://en.wikipedia.org/wiki/Green_Line_B_branch" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260418200813/https://www.mbta.com/projects/green-line-b-branch-station-consolidation/update/new-babcock-street-and-amory-street", "kind": "primary", "publisher": "Massachusetts Bay Transportation Authority", "quote": "On November 15, 2021, we're opening two new fully accessible stations at Babcock Street and Amory Street.", "tier": "primary", "title": "New Babcock Street and Amory Street Stations Open November 15", "url": "https://www.mbta.com/projects/green-line-b-branch-station-consolidation/update/new-babcock-street-and-amory-street", "via": "https://en.wikipedia.org/wiki/Green_Line_B_branch" } ], "stationCount": 2 } ], "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260609060913/https://en.wikipedia.org/wiki/Green_Line_B_branch", "kind": "wikipedia", "quote": "Service between Lake Street and downtown Boston began on August 15, 1896.", "tier": "tertiary", "title": "Green Line B branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_B_branch" } ] }, { "cityId": "boston", "color": "#00843D", "displayNumber": "Green-C", "id": "boston-line-Green-C", "name": { "en": "Green Line C Branch" }, "phases": [ { "confidence": "low", "geometryRef": "boston-Green-C", "id": "boston-green-c-1888", "kind": "initial", "label": { "en": "Initial streetcar line opens: Massachusetts Avenue → Coolidge Corner (Beacon Street tracks laid)" }, "notes": "[Opening-date chase 2026-06-13] Underlying ref is Clarke & Cummings (1997), offline; only year-level support exists. 1888 reflects when tracks were laid (Mass Ave -> Coolidge Corner).", "opened": "1888", "segment": { "fromStopIndex": 8, "toStopIndex": 12 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260107102204/https://en.wikipedia.org/wiki/Green_Line_C_branch", "kind": "wikipedia", "quote": "The first tracks on Beacon Street were laid in 1888, running from Massachusetts Avenue west to Coolidge Corner.", "tier": "tertiary", "title": "Green Line C branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_C_branch" } ] }, { "confidence": "low", "geometryRef": "boston-Green-C", "id": "boston-green-c-1889", "kind": "extension", "label": { "en": "Extension opens: Coolidge Corner → Cleveland Circle (with Reservoir carhouse access); Beacon Street line electrified" }, "notes": "Wikipedia phrases the Cleveland Circle extension and electrification as both occurring 'the next year' (1889), i.e. the year after the 1888 initial tracks. [Opening-date chase 2026-06-13] Year-level only; passage uncited inline but corroborated by the article's station listing (Winchester St-Cleveland Circle = 1889).", "opened": "1889", "segment": { "fromStopIndex": 0, "toStopIndex": 8 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260107102204/https://en.wikipedia.org/wiki/Green_Line_C_branch", "kind": "wikipedia", "quote": "The next year the rest of the line to Cleveland Circle opened, with access to the Reservoir carhouse. That same year, the line on Beacon Street to Cleveland Circle was electrified.", "tier": "tertiary", "title": "Green Line C branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_C_branch" } ] }, { "confidence": "medium", "geometryRef": "boston-Green-C", "id": "boston-green-c-1897", "kind": "extension", "label": { "en": "Beacon Street service routed into the Tremont Street subway via the Public Garden incline (turning at Park Street)" }, "notes": "Beacon Street cars began running into the Tremont Street subway on its 1 Sept 1897 opening; the subway itself is shared trunk infrastructure, not exclusive to this branch. [Opening-date chase 2026-06-13] Tremont Street subway article independently confirms September 1, 1897 (Boston Daily Globe same-day headline noted there). This is the date Beacon St service was routed into the subway, not a new physical line opening.", "opened": "1897-09-01", "segment": { "fromStopIndex": 17, "toStopIndex": 19 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260107102204/https://en.wikipedia.org/wiki/Green_Line_C_branch", "kind": "wikipedia", "quote": "The Tremont Street subway opened on September 1, 1897; Beacon Street service was routed into the Public Garden incline at the Public Garden, turning around at Park Street.", "tier": "tertiary", "title": "Green Line C branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_C_branch" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260531233717/https://en.wikipedia.org/wiki/Tremont_Street_subway", "kind": "other", "publisher": "Wikipedia", "quote": "opening on September 1, 1897", "tier": "tertiary", "title": "Tremont Street subway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Tremont_Street_subway", "via": "https://en.wikipedia.org/wiki/Green_Line_C_branch" }, { "accessedAt": "2026-06-13", "kind": "other", "publisher": "Boston Street Railway Association", "quote": "Cited at p.57 for the statement that the Tremont Street subway opened on September 1, 1897, and Beacon Street service entered via the Public Garden incline.", "tier": "secondary", "title": "Tremont Street Subway: A Century of Public Service", "url": "https://archive.org/details/tremontstreetsub0000clar", "via": "https://en.wikipedia.org/wiki/Green_Line_C_branch" } ] }, { "confidence": "medium", "geometryRef": "boston-Green-C", "id": "boston-green-c-1914", "kind": "extension", "label": { "en": "Boylston Street subway opens (westward extension of Tremont Street subway); Beacon Street line enters just east of Kenmore Square via the Kenmore incline" }, "notes": "The Boylston Street subway is shared trunk infrastructure for multiple Green Line services, not exclusive to the C branch. No cleanly sourced construction-cost figure for this segment was found. [Opening-date chase 2026-06-13] Boylston Street subway article gives only '1914' (no day) but does not conflict with the October 3 date from the cited book.", "opened": "1914-10-03", "segment": { "fromStopIndex": 13, "toStopIndex": 17 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260107102204/https://en.wikipedia.org/wiki/Green_Line_C_branch", "kind": "wikipedia", "quote": "The Boylston Street subway opened on October 3, 1914, as a westward extension of the Tremont Street subway. The Beacon Street line entered just east of Kenmore Square.", "tier": "tertiary", "title": "Green Line C branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_C_branch" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611115302/https://en.wikipedia.org/wiki/Boylston_Street_subway", "kind": "wikipedia", "quote": "By 1914 the 'temporary' connection was made, and most of the street cars on Boylston began using the new tunnel.", "tier": "tertiary", "title": "Boylston Street subway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Boylston_Street_subway" }, { "accessedAt": "2026-06-13", "kind": "other", "publisher": "Boston Street Railway Association", "quote": "Cited at p.57 for the statement that the Boylston Street subway opened on October 3, 1914.", "tier": "secondary", "title": "Tremont Street Subway: A Century of Public Service", "url": "https://archive.org/details/tremontstreetsub0000clar", "via": "https://en.wikipedia.org/wiki/Green_Line_C_branch" } ] }, { "confidence": "high", "geometryRef": "boston-Green-C", "id": "boston-green-c-1932", "kind": "extension", "label": { "en": "Underground Kenmore station opens (subway extended west under Kenmore Square); Beacon Street line surfaces via the new Saint Mary's Street incline" }, "notes": "Adds the underground Kenmore station (1 new station). The MBTA's own social post and Kenmore station Wikipedia both confirm the 23 Oct 1932 date. The St Mary's Street incline replaced the earlier surface approach. No sourced construction cost found for this extension. [Opening-date chase 2026-06-13] Kenmore station article (citing Belcher's MBTA service-change PDF) independently confirms October 23, 1932. MBTA Facebook primary post is blocked behind auth but its partial quote matches.", "opened": "1932-10-23", "segment": { "fromStopIndex": 12, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260107102204/https://en.wikipedia.org/wiki/Green_Line_C_branch", "kind": "wikipedia", "quote": "On October 23, 1932, a westward extension of the subway was opened with an underground Kenmore station. It split into separate tunnels for the Commonwealth Avenue and Beacon Street lines; the latter surfaced at Saint Mary's Street.", "tier": "tertiary", "title": "Green Line C branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_C_branch" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611115554/https://www.facebook.com/plugins/post.php?href=https%3A%2F%2Fwww.facebook.com%2FTheMBTA%2Fposts%2Fonthisday-in-1932-kenmore-subway-station-opened-for-service-the-new-underground-%2F1285058003661568%2F", "kind": "primary", "quote": "#OnThisDay in 1932 Kenmore subway station opened for service. The new underground...", "tier": "primary", "title": "MBTA — #OnThisDay in 1932 Kenmore subway station opened for service", "url": "https://www.facebook.com/TheMBTA/posts/onthisday-in-1932-kenmore-subway-station-opened-for-service-the-new-underground-/1285058003661568/" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250904171452/https://en.wikipedia.org/wiki/Kenmore_(MBTA_station)", "kind": "other", "publisher": "Wikipedia", "quote": "The subway station opened on October 23, 1932, replacing the former Kenmore Incline.", "tier": "tertiary", "title": "Kenmore (MBTA station) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Kenmore_(MBTA_station)", "via": "https://en.wikipedia.org/wiki/Green_Line_C_branch" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": null, "id": "boston-green-c-1940", "kind": "renumber", "label": { "en": "Beacon Street line assigned route number 61" }, "notes": "[Opening-date chase 2026-06-13] Administrative designation change (route number), not a revenue-service opening; year-only granularity is appropriate.", "opened": "1940", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260107102204/https://en.wikipedia.org/wiki/Green_Line_C_branch", "kind": "wikipedia", "quote": "From 1940 until its 1967 naming as the C branch, the Beacon Street line had route number 61.", "tier": "tertiary", "title": "Green Line C branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_C_branch" } ] }, { "confidence": "low", "geometryRef": null, "id": "boston-green-c-1967", "kind": "renumber", "label": { "en": "Beacon Street line (route 61) renamed the C branch under the new MBTA lettered branch scheme" }, "notes": "1967 is when the MBTA introduced the lettered (A–E) Green Line branch designations; the Beacon Street line became the 'C' branch. [Opening-date chase 2026-06-13] Administrative branch-letter naming, not a physical opening. A separate March 25, 1967 Lechmere extension is a different event and not this phase.", "opened": "1967", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260107102204/https://en.wikipedia.org/wiki/Green_Line_C_branch", "kind": "wikipedia", "quote": "From 1940 until its 1967 naming as the C branch, the Beacon Street line had route number 61.", "tier": "tertiary", "title": "Green Line C branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_C_branch" } ] } ], "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260107102204/https://en.wikipedia.org/wiki/Green_Line_C_branch", "kind": "wikipedia", "quote": "The first tracks on Beacon Street were laid in 1888, running from Massachusetts Avenue west to Coolidge Corner.", "tier": "tertiary", "title": "Green Line C branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_C_branch" } ] }, { "cityId": "boston", "color": "#00843D", "displayNumber": "Green-D", "id": "boston-line-Green-D", "name": { "en": "Green Line D Branch" }, "phases": [ { "confidence": "high", "constructionStart": "1958", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": false, "value": 8000000, "year": 1959 }, "notes": "Final construction outturn 'Total construction costs came to $8 million.' Authorized ceiling was $9.2 million (June 20, 1957 legislative approval, covering purchase + conversion); the MTA bought the Highland branch from the Boston & Albany on June 24, 1958 for $600,000 (a separate acquisition cost). Construction began July 10, 1958. The line reused ~ten former B&A station sites, relocated Riverside and Woodland, and added one new station (Fenway); exact final station count varies by source. [Citation chase 2026-06-11] The exact $8M total rests solely on the Highland branch Wikipedia article, whose two underlying citations (Pittsburgh Press, Nov 15 1959 and Cheney/Sammarco 1999 p.129) could not be directly verified; primary MTA records (1958 Annual Report, 1957 Mass. Act ch.450) independently confirm only the $9.2M authorization ceiling and the $7.0M Perini main construction contract, so the $8M is best read as a reported construction outturn between those two figures.", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611115822/https://en.wikipedia.org/wiki/Highland_branch", "kind": "wikipedia", "quote": "The MTA reopened the branch as the Riverside Line on July 4, 1959. ... Construction on the new light rail line began on July 10, 1958. ... Total construction costs came to $8 million. The state legislature approved the purchase and a total expenditure of $9.2 million on June 20, 1957. ... The MTA bought the Highland branch from the Boston and Albany on June 24, 1958 for $600,000.", "tier": "tertiary", "title": "Highland branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Highland_branch" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260512231641/https://en.wikipedia.org/wiki/Green_Line_D_branch", "kind": "wikipedia", "quote": "the state legislature authorized the Metropolitan Transit Authority (MTA) to acquire the Highland branch and convert it to rapid transit at a cost not to exceed $9.2 million ... Streetcar operation began on the converted Highland branch on July 4, 1959 ... 26,000 daily riders, versus 3,140 before conversion.", "tier": "tertiary", "title": "Green Line D branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_D_branch" }, { "accessedAt": "2026-06-11", "kind": "primary", "publisher": "Metropolitan Transit Authority", "quote": "On June 9th, the Authority entered into a contract for the construction of the Highland Branch Extension which calls for the completion of the project by July 1, 1959. The cost of the project is being financed by a bond issue authorized by the Legislature and limiting the amount that can be expended to a sum not to exceed $9,200,000.00.", "tier": "primary", "title": "12th Annual Report (Year Ended – December 31, 1958) of the Board of Trustees of the Metropolitan Transit Authority", "url": "https://archive.org/details/annual-report-of-the-board-of-trustees-of-the-metropolitan-transit-authority-1958/page/7/mode/2up", "via": "https://en.wikipedia.org/wiki/Green_Line_D_branch" }, { "accessedAt": "2026-06-11", "kind": "primary", "publisher": "Commonwealth of Massachusetts / Edward J. Cronin", "quote": "The authority may expend for the purposes of this section not exceeding nine million two hundred thousand dollars. No construction work shall be done under this section until a preliminary plan therefor, together with estimates of cost indicating that the project can be completed at a cost not exceeding nine million two hundred thousand dollars, shall have been approved by the commission of the department of public utilities.", "tier": "primary", "title": "Acts and Resolves Passed by the General Court of Massachusetts in the Year 1957 — Chapter 450: An Act Providing for Extension of Rapid Transit Facilities in the City of Boston, the Town of Brookline, and the City of Newton", "url": "https://archive.org/details/actsresolvespass1957mass/page/368", "via": "https://en.wikipedia.org/wiki/Green_Line_D_branch" } ] }, "geometryRef": "boston-Green-D", "id": "boston-green-d-1959", "kind": "initial", "label": { "en": "Riverside Line opens: Kenmore → Riverside (conversion of the B&A Highland Branch railroad to light rail)" }, "notes": "[Date chase 2026-06-12] Both Wikipedia sources are already cited on this phase and both trace the construction-start date to the underlying primary source Dana (1961), 'Riverside Line Extension, 1959,' Connecticut Valley Chapter NRHS Transportation Bulletin issue 65 — an offline periodical. The curated year 1958 is firmly supported (specific date: 1958-07-10). [Opening-date chase 2026-06-13] Belcher MBTA Route History PDF (directly fetched) explicitly lists July 4, 1959 as the Highland Branch opening; Pittsburgh Press (Nov 1959) is the inline citation behind the date. No separate ceremonial-vs-revenue offset.", "opened": "1959-07-04", "segment": { "fromStopIndex": 0, "toStopIndex": 19 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611115822/https://en.wikipedia.org/wiki/Highland_branch", "kind": "wikipedia", "quote": "The MTA reopened the branch as the Riverside Line on July 4, 1959. ... Construction on the new light rail line began on July 10, 1958. ... Total construction costs came to $8 million. The state legislature approved the purchase and a total expenditure of $9.2 million on June 20, 1957. ... The MTA bought the Highland branch from the Boston and Albany on June 24, 1958 for $600,000.", "tier": "tertiary", "title": "Highland branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Highland_branch" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260512231641/https://en.wikipedia.org/wiki/Green_Line_D_branch", "kind": "wikipedia", "quote": "the state legislature authorized the Metropolitan Transit Authority (MTA) to acquire the Highland branch and convert it to rapid transit at a cost not to exceed $9.2 million ... Streetcar operation began on the converted Highland branch on July 4, 1959 ... 26,000 daily riders, versus 3,140 before conversion.", "tier": "tertiary", "title": "Green Line D branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_D_branch" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20180612143942/https://www.newspapers.com/clip/20637896/boston_rides_old_rail_line_on_20c_fare/", "kind": "news", "publisher": "The Pittsburgh Press", "quote": "Cited inline (ref pp-19590608) for the July 4, 1959 reopening and ridership facts: \"Total construction costs came to $8 million. Daily ridership was 25,000, ten times what the B&A trains had carried at the end.\" (article dated November 15, 1959, Pittsburgh Press p. 43)", "tier": "secondary", "title": "Boston Rides Old Rail Line On 20c Fare", "url": "https://www.newspapers.com/clip/20637896/boston_rides_old_rail_line_on_20c_fare/", "via": "https://en.wikipedia.org/wiki/Highland_branch" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260601092329/http://roster.transithistory.org/MBTARouteHistory.pdf", "kind": "other", "publisher": "Boston Street Railway Association (Jonathan Belcher)", "quote": "July 4, 1959: The Highland Branch opened with stations Fenway Park, Longwood, Brookline Village, Brookline Hills, Beaconsfield, Reservoir, Chestnut Hill, Newton Center, Newton Highlands, Eliot, Waban, Woodland, and Riverside. The route was a former branch of the Boston & Albany railroad.", "tier": "secondary", "title": "Changes to Transit Service in the MBTA district", "url": "http://roster.transithistory.org/MBTARouteHistory.pdf", "via": "https://en.wikipedia.org/wiki/Green_Line_D_branch" } ], "stationCount": 13 }, { "confidence": "medium", "geometryRef": null, "id": "boston-green-d-1967", "kind": "renumber", "label": { "en": "Riverside Line redesignated as the Green Line 'D' branch (letter-designation of the five Green Line branches)" }, "notes": "[Opening-date chase 2026-06-13] Redesignation/rebranding event, not an infrastructure opening. Belcher PDF lists it under '1967:' with no month/day, so only year-level precision is available — consistent with the curated year-only date.", "opened": "1967", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260512231641/https://en.wikipedia.org/wiki/Green_Line_D_branch", "kind": "wikipedia", "quote": "In 1967, the five remaining Green Line branches were given letter designations; the Riverside Line became the D branch.", "tier": "tertiary", "title": "Green Line D branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_D_branch" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260601092329/http://roster.transithistory.org/MBTARouteHistory.pdf", "kind": "other", "publisher": "Boston Street Railway Association (Jonathan Belcher)", "quote": "1967: Letter coding was assigned to branches for use on maps and schedules (map numbers were no longer used): A Watertown, B Boston College, C Cleveland Circle, D Riverside, E Arborway", "tier": "secondary", "title": "Changes to Transit Service in the MBTA district", "url": "http://roster.transithistory.org/MBTARouteHistory.pdf", "via": "https://en.wikipedia.org/wiki/Green_Line_D_branch" } ] }, { "confidence": "high", "geometryRef": "boston-Green-D", "id": "boston-green-d-2022", "kind": "extension", "label": { "en": "Green Line Extension Union Square spur opens: Lechmere → Union Square" }, "notes": "GLX Union Square branch (D); opened 2022-03-21, ~3 months before the Medford branch. Segment also carries the GLX-era north subway (Govt Center → Lechmere → Union Square) on the D spine. Added during assembly — the research workflow recorded the GLX cost under the E/Medford phase, so no separate cost is carried here (avoids double-counting the shared GLX program cost). [Opening-date chase 2026-06-13] March 21, 2022 revenue opening confirmed by live MBTA project page (primary) and WBUR. Grand opening ceremony was same-day as revenue service (mid-to-late afternoon), not a prior-day ceremonial run. mass.gov press release URL is dead (403) but content corroborated by the live MBTA page.", "opened": "2022-03-21", "segment": { "fromStopIndex": 19, "toStopIndex": 24 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260519003620/https://en.wikipedia.org/wiki/Green_Line_Extension", "kind": "wikipedia", "quote": "The Union Square branch opened on March 21, 2022, followed by the Medford branch on December 12, 2022.", "tier": "tertiary", "title": "Green Line Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_Extension" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250707024159/https://www.mbta.com/projects/green-line-extension-glx/update/green-line-extension-glx-union-square-branch-opens-march", "kind": "primary", "publisher": "Massachusetts Bay Transportation Authority", "quote": "The Union Square Branch of the Green Line Extension (GLX) will open for service on March 21, 2022.", "tier": "primary", "title": "Green Line Extension (GLX) Union Square Branch Opens March 21", "url": "https://www.mbta.com/projects/green-line-extension-glx/update/green-line-extension-glx-union-square-branch-opens-march", "via": "https://en.wikipedia.org/wiki/Green_Line_Extension" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20230227204322/https://www.mass.gov/news/baker-polito-administration-celebrates-opening-of-the-green-line-extension", "kind": "primary", "publisher": "Government of Massachusetts", "quote": "Cited as ref 'mar21' in GLX Wikipedia article for the statement 'Service to Union Square began on March 21 as scheduled.' Press release dated March 21, 2022.", "tier": "primary", "title": "Baker-Polito Administration Celebrates Opening of the Green Line Extension", "url": "https://www.mass.gov/news/baker-polito-administration-celebrates-opening-of-the-green-line-extension", "via": "https://en.wikipedia.org/wiki/Green_Line_Extension" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251020184513/https://www.wbur.org/news/2022/02/24/mbta-somerville-green-line-open", "kind": "news", "publisher": "WBUR", "quote": "March 21 will feature a 'grand opening ceremony' with revenue service beginning 'some time mid- to late afternoon.'", "tier": "secondary", "title": "Green Line Extension service to begin March 21", "url": "https://www.wbur.org/news/2022/02/24/mbta-somerville-green-line-open", "via": "https://en.wikipedia.org/wiki/Green_Line_Extension" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260512231641/https://en.wikipedia.org/wiki/Green_Line_D_branch", "kind": "wikipedia", "quote": "the state legislature authorized the Metropolitan Transit Authority (MTA) to acquire the Highland branch and convert it to rapid transit at a cost not to exceed $9.2 million ... Streetcar operation began on the converted Highland branch on July 4, 1959 ... 26,000 daily riders, versus 3,140 before conversion.", "tier": "tertiary", "title": "Green Line D branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_D_branch" } ] }, { "cityId": "boston", "color": "#00843D", "displayNumber": "Green-E", "id": "boston-line-Green-E", "name": { "en": "Green Line E Branch" }, "phases": [ { "confidence": "high", "constructionStart": "1937", "cost": { "basis": "outturn", "confidence": "low", "nominal": { "currency": "USD", "isEstimate": false, "value": 7130000, "year": 1941 }, "notes": "Final construction cost of the Huntington Avenue Subway (WPA project): city paid $1.93M, federal government $5.20M. Wikipedia gives an inflation equivalent of ~$117M in 2025 dollars. This is the subway tunnel that the present-day E branch uses south of Copley; the E-branch designation itself dates to 1967. [Citation chase 2026-06-11] Direct source verification is blocked: the only citation tied to the $7.13M figure is a paywalled Feb 8, 1941 Boston Globe clip (Newspapers.com 54923110) that could not be read; the adjacent 1940 Boston Elevated Railway Annual Report supports only the subway's opening/physical details, not the cost. The figure is unverified beyond Wikipedia's own attribution.", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260513083117/https://en.wikipedia.org/wiki/Green_Line_E_branch", "kind": "wikipedia", "quote": "Construction began September 18, 1937 ... Opening February 16, 1941 ... Final cost: $7.13 million (equivalent to $117 million in 2025)", "tier": "tertiary", "title": "Green Line E branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_E_branch" } ] }, "geometryRef": "boston-Green-E", "id": "boston-green-e-1941", "kind": "initial", "label": { "en": "Huntington Avenue Subway opens: Copley Junction → Opera Place (Symphony), with Mechanics (Prudential) and Symphony underground stations" }, "notes": "[Date chase 2026-06-12] Wikipedia's stated 1937 start traces to Bradley H. Clarke, 'Streetcar Lines of the Hub – The 1940s' (2003, p.96), an offline book; a 1938 WPA bulletin on Internet Archive independently confirms construction was already underway by August 1938.", "opened": "1941-02-16", "segment": { "fromStopIndex": 9, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260513083117/https://en.wikipedia.org/wiki/Green_Line_E_branch", "kind": "wikipedia", "quote": "Construction began September 18, 1937 ... Opening February 16, 1941 ... Final cost: $7.13 million (equivalent to $117 million in 2025)", "tier": "tertiary", "title": "Green Line E branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_E_branch" }, { "accessedAt": "2026-06-12", "kind": "primary", "publisher": "Works Progress Administration", "quote": "Enlarge Huntington Avenue Subway Project [August 10, 1938 — describes extension of an already-underway project, corroborates construction was active by mid-1938 but does not state a September 1937 start date]", "tier": "primary", "title": "Enlarge Huntington Avenue Subway Project — Works Progress Bulletin, August 10, 1938", "url": "https://archive.org/details/worksprogressbul3840unit/page/n44", "via": "https://en.wikipedia.org/wiki/Green_Line_E_branch" }, { "accessedAt": "2026-06-12", "kind": "other", "publisher": "Boston Street Railway Association", "quote": "[Wikipedia cites this book (Bradley H. Clarke, 2003, p. 96) as the primary source for 'Construction began on September 18, 1937' — book is offline]", "tier": "secondary", "title": "Streetcar Lines of the Hub – The 1940s, p. 96", "url": "offline:978-0938315056", "via": "https://en.wikipedia.org/wiki/Green_Line_E_branch" } ], "stationCount": 2 }, { "confidence": "low", "geometryRef": "boston-Green-E", "id": "boston-green-e-1945", "kind": "extension", "label": { "en": "Heath Street loop constructed; PCC streetcar terminus established on Huntington/South Huntington Avenue surface line" }, "opened": "1945-12-15", "segment": { "fromStopIndex": 15, "toStopIndex": 24 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260513083117/https://en.wikipedia.org/wiki/Green_Line_E_branch", "kind": "wikipedia", "quote": "Constructed in 1945 to accommodate new PCC streetcars ... Route 57 extended to loop: December 15, 1945", "tier": "tertiary", "title": "Green Line E branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_E_branch" } ] }, { "confidence": "low", "geometryRef": null, "id": "boston-green-e-1967", "kind": "renumber", "label": { "en": "Huntington Avenue line designated the Green Line 'E' branch (renumbering/relettering of the existing Arborway/Huntington Ave service)" }, "opened": "1967", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260513083117/https://en.wikipedia.org/wiki/Green_Line_E_branch", "kind": "wikipedia", "quote": "Tremont Street routes designated Green Line in 1965; Huntington Avenue line became E branch in 1967.", "tier": "tertiary", "title": "Green Line E branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_E_branch" } ] }, { "closed": "1985-12-28", "confidence": "low", "geometryRef": null, "id": "boston-green-e-1985", "kind": "reopening", "label": { "en": "Arborway Line (Heath Street → Arborway surface segment) closed; service indefinitely replaced by route 39 bus, ending PCC streetcar operation" }, "opened": "1985-12-28", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260513083117/https://en.wikipedia.org/wiki/Green_Line_E_branch", "kind": "wikipedia", "quote": "December 28, 1985, the Arborway Line was indefinitely replaced by route 39", "tier": "tertiary", "title": "Green Line E branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_E_branch" } ] }, { "confidence": "low", "geometryRef": null, "id": "boston-green-e-1986", "kind": "reopening", "label": { "en": "Light rail vehicle service resumed on the E branch to Brigham Circle (replacing the temporary bus operation south of the subway)" }, "opened": "1986-07-26", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260513083117/https://en.wikipedia.org/wiki/Green_Line_E_branch", "kind": "wikipedia", "quote": "July 26, 1986 service resumed to Brigham Circle", "tier": "tertiary", "title": "Green Line E branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_E_branch" } ] }, { "confidence": "low", "geometryRef": "boston-Green-E", "id": "boston-green-e-1987", "kind": "extension", "label": { "en": "E branch (Brigham Circle service) extended north through the central subway to Lechmere; Type 7 LRVs introduced" }, "opened": "1987-06-20", "segment": { "fromStopIndex": 5, "toStopIndex": 9 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260513083117/https://en.wikipedia.org/wiki/Green_Line_E_branch", "kind": "wikipedia", "quote": "June 20, 1987, all Brigham Circle service was extended to Lechmere", "tier": "tertiary", "title": "Green Line E branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_E_branch" } ] }, { "confidence": "low", "geometryRef": null, "id": "boston-green-e-1989", "kind": "reopening", "label": { "en": "E branch surface service restored from Brigham Circle to Heath Street (south end reopened after street trackage replacement); route 39 bus retained south of Heath Street" }, "opened": "1989-11-04", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260513083117/https://en.wikipedia.org/wiki/Green_Line_E_branch", "kind": "wikipedia", "quote": "Heath Street service resumed on November 4, 1989, but route 39 buses continued to provide all service south of Heath Street.", "tier": "tertiary", "title": "Green Line E branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_E_branch" } ] }, { "closed": "2020-05-24", "confidence": "low", "geometryRef": null, "id": "boston-green-e-2020", "kind": "reopening", "label": { "en": "E branch cut back from Lechmere to North Station for Green Line Extension construction; original Lechmere station closed" }, "notes": "[Opening-date chase 2026-06-13] Wikipedia internal day-level discrepancy: narrative says May 24, 2020 (service cutback); station table says May 23, 2020 (Lechmere surface station last day). Likely last-service vs first-closed-day; year 2020 unaffected.", "opened": "2020-05-24", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260513083117/https://en.wikipedia.org/wiki/Green_Line_E_branch", "kind": "wikipedia", "quote": "May 24, 2020: Service cut back from Lechmere to North Station for Green Line Extension construction.", "tier": "tertiary", "title": "Green Line E branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_E_branch" } ] }, { "confidence": "high", "constructionStart": "2018", "cost": { "basis": "budget", "confidence": "high", "nominal": { "currency": "USD", "isEstimate": false, "value": 2280000000, "year": 2014 }, "notes": "Total cost of the ENTIRE Green Line Extension project (both the Medford Branch carrying the E branch AND the Union Square Branch carrying the D branch, plus the rebuilt Lechmere station and viaduct) — NOT the Medford segment alone. $0.996B federal + $1.28B state/other. FFGA (signed January 2015) gave $2.3B in 2014 dollars. Main groundbreaking June 25, 2018; original groundbreaking December 11, 2012; the new (rebuilt elevated) Lechmere station is shared between the two branches. Medford Branch added 5 new stations plus the relocated Lechmere terminus. [Citation chase 2026-06-11] The $2.28B is the FFGA \"newly revised budget\" per the MassDOT GLX page (an authorized budget, not a final audited outturn); the MBTA's Dec 12 2022 opening press release rounds it to $2.3 billion.", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260519003620/https://en.wikipedia.org/wiki/Green_Line_Extension", "kind": "wikipedia", "quote": "Medford Branch: December 12, 2022 ... 5 stations: East Somerville, Gilman Square, Magoun Square, Ball Square, Medford/Tufts ... Plus Lechmere station (shared terminus) ... Total project cost was estimated to be $2.28 billion: $0.996 billion from the federal government and $1.28 billion from state and other sources.", "tier": "tertiary", "title": "Green Line Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_Extension" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260513083117/https://en.wikipedia.org/wiki/Green_Line_E_branch", "kind": "wikipedia", "quote": "December 12, 2022: Medford Branch revenue service began, making E branch run from Medford/Tufts to Heath Street", "tier": "tertiary", "title": "Green Line E branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_E_branch" }, { "accessedAt": "2026-06-11", "kind": "primary", "publisher": "Massachusetts Department of Transportation (MassDOT) via Internet Archive", "quote": "federal dollars will fund approximately $996 million of the newly revised budget of $2.28 billion", "tier": "secondary", "title": "About the Green Line Extension Project (archived)", "url": "https://web.archive.org/web/20211125064456/https://www.mass.gov/info-details/about-the-green-line-extension-project", "via": "https://en.wikipedia.org/wiki/Green_Line_Extension" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20251012193321/https://www.mbta.com/news/2022-12-12/mbta-celebrates-opening-the-green-line-extension-medford-branch", "kind": "primary", "publisher": "Massachusetts Bay Transportation Authority", "quote": "The $2.3 billion project extends the Green Line approximately 4.7 miles along two branches", "tier": "secondary", "title": "MBTA Celebrates Opening of the Green Line Extension Medford Branch", "url": "https://www.mbta.com/news/2022-12-12/mbta-celebrates-opening-the-green-line-extension-medford-branch", "via": "https://en.wikipedia.org/wiki/Green_Line_E_branch" } ] }, "geometryRef": "boston-Green-E", "id": "boston-green-e-2022", "kind": "extension", "label": { "en": "Green Line Extension Medford Branch opens: Lechmere → Medford/Tufts (East Somerville, Gilman Square, Magoun Square, Ball Square, Medford/Tufts); E branch extended from Heath Street to Medford/Tufts" }, "notes": "[Date chase 2026-06-12] Main GLX construction began 2018 (formal groundbreaking June 25, 2018; NTP issued Dec 2017 after FTA released initial funding). A separate 2012 Phase 1 bridge reconstruction/demolition preceded this; the curated 2018 date correctly reflects the main design-build construction contract, not the earlier 2012 enabling work.", "opened": "2022-12-12", "segment": { "fromStopIndex": 0, "toStopIndex": 5 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260519003620/https://en.wikipedia.org/wiki/Green_Line_Extension", "kind": "wikipedia", "quote": "Medford Branch: December 12, 2022 ... 5 stations: East Somerville, Gilman Square, Magoun Square, Ball Square, Medford/Tufts ... Plus Lechmere station (shared terminus) ... Total project cost was estimated to be $2.28 billion: $0.996 billion from the federal government and $1.28 billion from state and other sources.", "tier": "tertiary", "title": "Green Line Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_Extension" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260513083117/https://en.wikipedia.org/wiki/Green_Line_E_branch", "kind": "wikipedia", "quote": "December 12, 2022: Medford Branch revenue service began, making E branch run from Medford/Tufts to Heath Street", "tier": "tertiary", "title": "Green Line E branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_E_branch" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260530040843/https://www.wbur.org/news/2018/06/25/green-line-extension-groundbreaking", "kind": "news", "publisher": "WBUR", "quote": "Officials broke ground Monday on the long-delayed MBTA Green Line Extension into Somerville and Medford.", "tier": "secondary", "title": "Officials Break Ground On Green Line Extension — WBUR", "url": "https://www.wbur.org/news/2018/06/25/green-line-extension-groundbreaking", "via": "https://en.wikipedia.org/wiki/Green_Line_Extension" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20241031174520/https://www.mbta.com/news/2017-12-21/federal-funds-issued-mbta-green-line-extension-project", "kind": "primary", "publisher": "Massachusetts Bay Transportation Authority", "quote": "[Wikipedia states: 'The FTA released the first $100 million in funding in December 2017, allowing the MBTA to issue a notice to proceed for the main construction contract' — establishes NTP in Dec 2017 immediately preceding 2018 construction]", "tier": "primary", "title": "Federal Funds Issued for MBTA Green Line Extension Project — MBTA press release, December 21, 2017", "url": "https://www.mbta.com/news/2017-12-21/federal-funds-issued-mbta-green-line-extension-project", "via": "https://en.wikipedia.org/wiki/Green_Line_Extension" } ], "stationCount": 6 } ], "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260513083117/https://en.wikipedia.org/wiki/Green_Line_E_branch", "kind": "wikipedia", "quote": "Construction began September 18, 1937 ... Opening February 16, 1941 ... Final cost: $7.13 million (equivalent to $117 million in 2025)", "tier": "tertiary", "title": "Green Line E branch — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_Line_E_branch" } ] }, { "cityId": "boston", "color": "#7C878E", "displayNumber": "Silver-SL1", "id": "boston-line-Silver-SL1", "name": { "en": "Silver Line SL1" }, "phases": [ { "confidence": "high", "constructionStart": "1995", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "USD", "isEstimate": false, "value": 624000000, "year": 2004 }, "notes": "Final outturn cost of the ENTIRE South Boston Piers Transitway tunnel (shared infrastructure for SL1, SL2 and SL3 — not the SL1 route alone). Original November 1994 FFGA projected a $413M total cost with $331M (80%) federal; by 2000 the estimate had risen to $601M; final cost to the MBTA was $624M. Price-level year of the $624M figure not explicitly stated (taken as completion year 2004). Stations on this segment: South Station, Courthouse, World Trade Center, Silver Line Way (4). [Citation chase 2026-06-11] The FTA 2007 Evaluation gives the more precise figure of $624.2M as the total project cost as of August 2006, after legal claims were settled — confirming the $624M is a final outturn rather than an estimate.", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "Environmental documentation was filed in 1998, and construction began in 2001.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "The Transitway opened on December 17, 2004, with the Waterfront shuttle route between South Station and Silver Line operated by a mix of new dual-mode buses and 40-foot (12 m) trolleybuses borrowed from the Harvard-based routes.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "The Transitway was ultimately completed in 2004, with a final cost to the MBTA of $624 million.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20250830224204/https://www.govinfo.gov/content/pkg/GAOREPORTS-GAO-01-174R/html/GAOREPORTS-GAO-01-174R.htm", "kind": "primary", "quote": "the federal government would provide $331 million (80 percent) of the projected $413 million total cost ... its estimated total cost has risen to $601 million", "tier": "primary", "title": "Mass Transit: Review of the South Boston Piers Transitway Finance Plan (GAO-01-174R)", "url": "https://www.govinfo.gov/content/pkg/GAOREPORTS-GAO-01-174R/html/GAOREPORTS-GAO-01-174R.htm" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20250605003217/https://www.transit.dot.gov/sites/fta.dot.gov/files/FINALBOSTONBRTREPORT062507.pdf", "kind": "primary", "publisher": "Federal Transit Administration", "quote": "As of August 2006, the total project costs were $624.2 million after some legal claims were settled.", "tier": "secondary", "title": "Silver Line Waterfront Bus Rapid Transit (BRT): 2007 Evaluation", "url": "https://www.transit.dot.gov/sites/fta.dot.gov/files/FINALBOSTONBRTREPORT062507.pdf", "via": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-11", "kind": "primary", "publisher": "Federal Transit Administration via Internet Archive", "quote": "As of August 2006, the total project costs were $624.2 million after some legal claims were settled.", "tier": "secondary", "title": "Silver Line Waterfront Bus Rapid Transit (BRT): 2007 Evaluation (archived)", "url": "https://web.archive.org/web/20230101/https://www.transit.dot.gov/sites/fta.dot.gov/files/FINALBOSTONBRTREPORT062507.pdf", "via": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" } ] }, "geometryRef": null, "id": "boston-silver-sl1-2004", "kind": "initial", "label": { "en": "Waterfront Transitway (South Boston Piers Transitway) opens: South Station → Silver Line Way (bus tunnel infrastructure later used by SL1; initial Waterfront shuttle service)" }, "notes": "[Date chase 2026-06-12] constructionStart corrected from 2001 to 1995: the 2001 value derives from a Wikipedia quote about the Washington Street corridor (Phase I / SL4-SL5), not the Waterfront Transitway that SL1 uses. Boston Globe (Nov 22 2004) Phase II sidebar gives 'construction in 1995'; GAO-01-174R (Nov 1994 full-funding grant, Dec 2000 completion target, contracts 25-72% complete by Sept 2000) and Wikipedia's Waterfront section ('construction already under way' by 1997) corroborate a 1995 start. Construction-start corrected 2001→1995 [Date chase 2026-06-12 — panel-confirmed, corrected w/ sign-off] [Opening-date chase 2026-06-13] This was the Waterfront shuttle revenue opening of the Transitway infrastructure; SL2/SL3 through service to Waterfront/City Point began two weeks later on December 31, 2004. No separate ceremonial opening preceded the December 17 revenue service.", "opened": "2004-12-17", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "Environmental documentation was filed in 1998, and construction began in 2001.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "The Transitway opened on December 17, 2004, with the Waterfront shuttle route between South Station and Silver Line operated by a mix of new dual-mode buses and 40-foot (12 m) trolleybuses borrowed from the Harvard-based routes.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "The Transitway was ultimately completed in 2004, with a final cost to the MBTA of $624 million.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20250830224204/https://www.govinfo.gov/content/pkg/GAOREPORTS-GAO-01-174R/html/GAOREPORTS-GAO-01-174R.htm", "kind": "primary", "quote": "the federal government would provide $331 million (80 percent) of the projected $413 million total cost ... its estimated total cost has risen to $601 million", "tier": "primary", "title": "Mass Transit: Review of the South Boston Piers Transitway Finance Plan (GAO-01-174R)", "url": "https://www.govinfo.gov/content/pkg/GAOREPORTS-GAO-01-174R/html/GAOREPORTS-GAO-01-174R.htm" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20251117020936/http://archive.boston.com/news/local/articles/2004/11/22/bus_tunnel_to_open_but_waterfront_boom_lags?pg=full", "kind": "news", "publisher": "Boston Globe", "quote": "Design began in 1990, construction in 1995; original promised completion date was 2003, now end of 2004 [from 'Hi ho silver: Key facts about Silver Line Phase II' sidebar]", "tier": "secondary", "title": "Bus tunnel to open, but waterfront boom lags — The Boston Globe", "url": "https://archive.boston.com/news/local/articles/2004/11/22/bus_tunnel_to_open_but_waterfront_boom_lags?pg=full", "via": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" } ], "stationCount": 4 }, { "confidence": "low", "geometryRef": null, "id": "boston-silver-sl1-2005", "kind": "extension", "label": { "en": "Silver Line Connector interim shuttle begins: Silver Line Way → Logan Airport (Sunday-only diesel-bus shuttle, transfer at Silver Line Way)" }, "notes": "[Opening-date chase 2026-06-13] This was a distinct interim phase: a Sunday-only diesel-bus shuttle with transfer at Silver Line Way, not the full SL1 dual-mode through-service (which began June 1, 2005). Started to meet a legal commitment to begin airport service that month.", "opened": "2005-01-02", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "Two days later, a Sunday-only Silver Line Way-Logan Airport shuttle service called 'Silver Line Connector' began operation to meet a legal commitment to begin airport service that month.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20251118074628/https://en.wikipedia.org/wiki/Silver_Line_Way_station", "kind": "wikipedia", "quote": "Silver Line Way served as the transfer point between these services and diesel buses to Logan Airport beginning in January 2005.", "tier": "tertiary", "title": "Silver Line Way station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_Way_station" } ] }, { "confidence": "medium", "geometryRef": null, "id": "boston-silver-sl1-2005-2", "kind": "extension", "label": { "en": "SL1 through-service to Logan Airport begins: South Station → Logan Airport terminals (via Waterfront Transitway, dual-mode buses; airport terminal stops added)" }, "notes": "[Opening-date chase 2026-06-13] Full SL1 through-service to Logan Airport; superseded the January 2005 Sunday-only interim shuttle. Buses were freed for SL1 when SL2/3 routes were combined at all times on May 28, 2005.", "opened": "2005-06-01", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "On June 1, 2005, the two routes were combined at all times as the SL2/3. This freed up buses for SL1 service to Logan Airport, which began on June 1.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20251118074628/https://en.wikipedia.org/wiki/Silver_Line_Way_station", "kind": "wikipedia", "quote": "SL1 through service began on June 1, 2005.", "tier": "tertiary", "title": "Silver Line Way station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_Way_station" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260412180725/https://www.newspapers.com/article/the-boston-globe/192032260/", "kind": "news", "publisher": "The Boston Globe", "quote": "Article dated June 2, 2005 (day after launch), reporting on SL1 service to Logan Airport beginning.", "tier": "secondary", "title": "Silver Line brightens trip for airport-bound travelers — The Boston Globe", "url": "https://www.newspapers.com/article/the-boston-globe/192032260/", "via": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" } ], "stationCount": 5 } ], "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "Environmental documentation was filed in 1998, and construction began in 2001.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" } ] }, { "cityId": "boston", "color": "#7C878E", "displayNumber": "Silver-SL2", "id": "boston-line-Silver-SL2", "name": { "en": "Silver Line SL2" }, "phases": [ { "confidence": "high", "constructionStart": "1995", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "USD", "isEstimate": false, "value": 624000000, "year": 2004 }, "notes": "Final cost of the ENTIRE South Boston Piers Transitway (the underground busway with stations at Courthouse, World Trade Center, Silver Line Way plus the South Station connection), shared by SL1 and SL2 (and the former SL3) — NOT the SL2 surface segment alone. Project ran heavily over budget: original first phase budgeted ~$413M (FTA funding $331M / 80% approved Nov 1994); by late 2000 it was ~3 years behind and almost $200M over budget, ending at ~$624M. Some secondary sources round to ~$625M. [Citation chase 2026-06-11] A primary FTA source (Silver Line Waterfront BRT: 2007 Evaluation) reports total project costs of $624.2M as of August 2006 after legal claims were settled — confirming $624M as the actual final (outturn) cost; the MBTA expected the figure to settle near $618.8M once all claims fully resolved.", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "On December 31, 2004, service began on routes SL2 to the Boston Marine Industrial Park", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "The Transitway was ultimately completed in 2004, with a final cost to the MBTA of $624 million.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "The FTA agreed to fund $331 million (80%) of the $413 million first phase ... By late 2000, the project was three years behind schedule and almost $200 million over budget.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20251118074628/https://en.wikipedia.org/wiki/Silver_Line_Way_station", "kind": "wikipedia", "quote": "The South Boston Piers Transitway between South Station and Silver Line Way opened on December 17, 2004 ... SL2 and SL3 through service to the Waterfront and City Point areas began on December 31, 2004", "tier": "tertiary", "title": "Silver Line Way station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_Way_station" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20250605003217/https://www.transit.dot.gov/sites/fta.dot.gov/files/FINALBOSTONBRTREPORT062507.pdf", "kind": "primary", "publisher": "Federal Transit Administration", "quote": "As of August 2006, the total project costs were $624.2 million after some legal claims were settled. The MBTA still feels that the cost to complete for the project will be $618.8 million when all legal claims are resolved.", "tier": "primary", "title": "Silver Line Waterfront Bus Rapid Transit (BRT): 2007 Evaluation", "url": "https://www.transit.dot.gov/sites/fta.dot.gov/files/FINALBOSTONBRTREPORT062507.pdf", "via": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-11", "kind": "primary", "publisher": "Federal Transit Administration", "quote": "As of August 2006, the total project costs were $624.2 million after some legal claims were settled.", "tier": "primary", "title": "Silver Line Waterfront Bus Rapid Transit (BRT): 2007 Evaluation (Wayback Machine archive)", "url": "https://web.archive.org/web/20240402234600/https://www.transit.dot.gov/sites/fta.dot.gov/files/FINALBOSTONBRTREPORT062507.pdf", "via": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20210128092931/https://www.gao.gov/assets/100/90177.pdf", "kind": "primary", "publisher": "General Accounting Office", "quote": "In November 1994, the Federal Transit Administration (FTA) entered into a full funding grant agreement with MBTA, under which the federal government would provide $331 million (80 percent) of the projected $413 million total cost for the project's first phase, which was to be completed in December 2000. ... currently, the project is 3 years behind schedule and its estimated total cost has risen to $601 million.", "tier": "primary", "title": "Mass Transit: Review of the South Boston Piers Transitway Finance Plan (GAO-01-174R)", "url": "https://www.gao.gov/assets/100/90177.pdf", "via": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-11", "kind": "primary", "publisher": "General Accounting Office", "quote": "The first phase of the South Boston Piers Transitway project is now expected to cost $601 million—a $188 million increase (46 percent) over the $413 million projected in the 1994 full funding grant agreement.", "tier": "primary", "title": "Mass Transit: Review of the South Boston Piers Transitway Finance Plan (GAO-01-174R) (Wayback Machine archive)", "url": "https://web.archive.org/web/20230405010145/https://www.gao.gov/assets/100/90177.pdf", "via": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" } ] }, "geometryRef": null, "id": "boston-silver-sl2-2004", "kind": "initial", "label": { "en": "SL2 opens: South Station → Boston Marine Industrial Park (Design Center) via the South Boston Piers Transitway" }, "notes": "[Date chase 2026-06-12] FTA 2007 BRT Evaluation Report confirms Transitway construction began in 1995 after a five-year planning process; Full Funding Grant Agreement executed 1994 and state environmental review completed April 18, 1995, immediately preceding construction. Full opening slipped from 2000 to 2005, a ~10-year construction period. [Opening-date chase 2026-06-13] Dec 17, 2004 was an interim tunnel opening with a limited shuttle; full SL2 revenue service began Dec 31, 2004. FTA Washington Street evaluation labels the Phase II opening as 'interim,' corroborating the partial-then-full distinction.", "opened": "2004-12-31", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "On December 31, 2004, service began on routes SL2 to the Boston Marine Industrial Park", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "The Transitway was ultimately completed in 2004, with a final cost to the MBTA of $624 million.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "The FTA agreed to fund $331 million (80%) of the $413 million first phase ... By late 2000, the project was three years behind schedule and almost $200 million over budget.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20251118074628/https://en.wikipedia.org/wiki/Silver_Line_Way_station", "kind": "wikipedia", "quote": "The South Boston Piers Transitway between South Station and Silver Line Way opened on December 17, 2004 ... SL2 and SL3 through service to the Waterfront and City Point areas began on December 31, 2004", "tier": "tertiary", "title": "Silver Line Way station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_Way_station" }, { "accessedAt": "2026-06-12", "kind": "primary", "publisher": "Federal Transit Administration (via Internet Archive)", "quote": "After a five-year planning process, construction began in 1995. However, the full project opening was delayed from 2000 to 2005, resulting in a 10-year construction period. The construction difficulties led to an increase in total project cost from $413 million in the original Full Funding Grant Agreement to the current estimate of $619 million.", "tier": "primary", "title": "Silver Line Waterfront Bus Rapid Transit (BRT): 2007 Evaluation (archived)", "url": "https://web.archive.org/web/20230101000000/https://www.transit.dot.gov/sites/fta.dot.gov/files/FINALBOSTONBRTREPORT062507.pdf", "via": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251230003330/https://nbrti.org/wp-content/uploads/2017/05/Boston_Silver_Line_final_report.pdf", "kind": "primary", "publisher": "Federal Transit Administration", "quote": "Phase II of the project, which had an interim opening on December 17, 2004, was covered in the Data Collection Plan, but will be the subject of a separate evaluation report.", "tier": "primary", "title": "Boston Silver Line Washington Street Bus Rapid Transit (BRT): Demonstration Project Evaluation (FTA, September 2005)", "url": "https://nbrti.org/wp-content/uploads/2017/05/Boston_Silver_Line_final_report.pdf", "via": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" } ], "stationCount": 4 }, { "confidence": "low", "geometryRef": null, "id": "boston-silver-sl2-2009", "kind": "renumber", "label": { "en": "SL2 terminus renamed to 'Design Center' (no service change)" }, "notes": "[Opening-date chase 2026-06-13] This is a terminus rename only (no service alteration); not a new service opening.", "opened": "2009-10", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "In October 2009, the SL2 terminus was renamed 'Design Center' with no changes in service.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" } ] } ], "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "On December 31, 2004, service began on routes SL2 to the Boston Marine Industrial Park", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" } ] }, { "cityId": "boston", "color": "#7C878E", "displayNumber": "Silver-SL3", "id": "boston-line-Silver-SL3", "name": { "en": "Silver Line SL3" }, "phases": [ { "confidence": "low", "geometryRef": null, "id": "boston-silver-sl3-2004", "kind": "initial", "label": { "en": "Original SL3 opens: South Station ↔ City Point (via Northern Ave, Drydock Ave, Summer St)" }, "notes": "This is the ORIGINAL/first SL3 service (South Boston Waterfront/City Point), entirely distinct from the current Chelsea SL3. It shared most of its route with SL2 (Waterfront Tunnel busway from South Station). Opened same day as SL2 to Boston Marine Industrial Park. [Opening-date chase 2026-06-13] The South Station–Silver Line Way Transitway opened earlier on Dec 17, 2004 as a shuttle; Dec 31, 2004 is correct for SL3 specifically reaching City Point.", "opened": "2004-12-31", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "On December 31, 2004, service began on routes SL2 to the Boston Marine Industrial Park and route SL3 to City Point – the latter running via Northern Avenue, Drydock Avenue, and Summer Street.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" } ] }, { "confidence": "low", "geometryRef": null, "id": "boston-silver-sl3-2005", "kind": "extension", "label": { "en": "Original SL3 extended: City Point → Farragut Road loop (weekday service)" }, "notes": "Weekday-only extension of the original City Point SL3 to a loop on Farragut Road. Short-lived; the loop was cut four months later (see next phase).", "opened": "2005-04-09", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "On April 9, weekday SL3 service was extended from City Point to a loop on Farragut Road.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" } ] }, { "closed": "2005-08-20", "confidence": "low", "geometryRef": null, "id": "boston-silver-sl3-2005-2", "kind": "renumber", "label": { "en": "Original SL3 Farragut Road loop cut (service reverts to City Point)" }, "notes": "Partial closure: the Farragut Road loop added in April 2005 was eliminated due to resident noise complaints; SL3 reverted to terminating at City Point. Classified as a service-extent change (not a full reopening); no full line closure. Date per English Wikipedia. [Opening-date chase 2026-06-13] This phase records a service contraction (loop cut, reversion to City Point), not a service opening, but the event date is correct.", "opened": "2005-08-20", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "On August 20, and the Farragut Road loop was cut due to noise complaints from residents.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" } ] }, { "closed": "2009-03-20", "confidence": "low", "geometryRef": null, "id": "boston-silver-sl3-2009", "kind": "renumber", "label": { "en": "Original SL3 (City Point) discontinued; service folded into SL2" }, "notes": "The original City Point SL3 was discontinued entirely due to very low ridership (under 1 passenger per trip by 2008 on the non-shared segment); SL2 frequency was increased to replace it. The SL3 designation was later reused for the unrelated Chelsea service in 2018. [Opening-date chase 2026-06-13] This phase records a discontinuation, not an opening; the date is correct for the event.", "opened": "2009-03-20", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "By 2008, the SL3 averaged less than one passenger per trip on the segment not shared with the SL2. On March 20, 2009, SL3 service was cut, with SL2 service increased in its stead.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" } ] }, { "confidence": "medium", "constructionStart": "2015", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "USD", "isEstimate": false, "value": 56700000, "year": 2018 }, "notes": "Total Silver Line Gateway (SL3-Chelsea) construction investment: $56.7M, jointly funded MBTA ~$49.1M + MassDOT ~$7.6M. A $33.8M construction contract was approved Sep 2014 (per Chelsea station Wikipedia); the $56.7M is the full project investment per the MBTA/MassDOT announcement. Covers dedicated busways + 4 new Chelsea stations; the new SL3 also uses 5 existing Silver Line stations in Boston.", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20251116222555/https://www.mbta.com/news/2018-03-12/new-silver-line-3-chelsea-service-between-chelsea-and-south-station", "kind": "primary", "quote": "Construction of the SL3-Chelsea route began in March 2015 with construction of dedicated busways and four new stations. ... Construction of this $56.7 million investment was managed by MassDOT's Highway Division and jointly funded by the MBTA (approximately $49.1 million) and MassDOT ($7.6 million).", "tier": "primary", "title": "New Silver Line 3-Chelsea Service between Chelsea and South Station — MBTA News", "url": "https://www.mbta.com/news/2018-03-12/new-silver-line-3-chelsea-service-between-chelsea-and-south-station" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20251116222555/https://www.mbta.com/news/2018-03-12/new-silver-line-3-chelsea-service-between-chelsea-and-south-station", "kind": "primary", "quote": "The MBTA is pleased to announce the brand new Silver Line 3-Chelsea route will operate between South Station and the Chelsea and East Boston communities beginning Saturday, April 21, 2018.", "tier": "primary", "title": "New Silver Line 3-Chelsea Service between Chelsea and South Station — MBTA News", "url": "https://www.mbta.com/news/2018-03-12/new-silver-line-3-chelsea-service-between-chelsea-and-south-station" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "A separate SL3 route to Chelsea – originally planned as part of the cancelled Urban Ring Project – began service on April 21, 2018.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20251222011512/https://en.wikipedia.org/wiki/Chelsea_station_(MBTA)", "kind": "wikipedia", "quote": "A $33.8 million construction contract was approved in September 2014, and construction began in March 2015. ... Silver Line service to Chelsea on the SL3 route began on April 21, 2018.", "tier": "tertiary", "title": "Chelsea station (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Chelsea_station_(MBTA)" } ] }, "geometryRef": null, "id": "boston-silver-sl3-2018", "kind": "reopening", "label": { "en": "New SL3 (Silver Line Gateway) opens: South Station → Chelsea (4 new Chelsea stations)" }, "notes": "The SL3 designation was reused in 2018 for an entirely separate route to Chelsea via the Ted Williams Tunnel, originally planned as part of the cancelled Urban Ring Project — hence 'reopening' of the SL3 label rather than a true continuation of the City Point service. Construction began March 2015. Four new stations built in Chelsea (Eastern Avenue, Box District, Bellingham Square, Chelsea/Mystic Mall-area; later Chelsea station). Note: a separate, relocated Chelsea Commuter Rail station ($37.7M project, $32.4M contract awarded Apr 2019, construction Aug 2019) opened Nov 15, 2021 replacing Bellingham Square platforms — that is a commuter-rail relocation adjacent to the SL3 stop, not a new SL3 service phase. [Date chase 2026-06-12] Construction start (March 2015) is corroborated by the Chelsea station (MBTA) Wikipedia article, chased via the Silver Line (MBTA) line article; that article cites two dead MassDOT/blog.mass.gov press releases inline, but the live MBTA press release independently confirms the same month and year. The Silver Line (MBTA) line-level article itself contains no SL3-Chelsea construction-start date.", "opened": "2018-04-21", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20251116222555/https://www.mbta.com/news/2018-03-12/new-silver-line-3-chelsea-service-between-chelsea-and-south-station", "kind": "primary", "quote": "Construction of the SL3-Chelsea route began in March 2015 with construction of dedicated busways and four new stations. ... Construction of this $56.7 million investment was managed by MassDOT's Highway Division and jointly funded by the MBTA (approximately $49.1 million) and MassDOT ($7.6 million).", "tier": "primary", "title": "New Silver Line 3-Chelsea Service between Chelsea and South Station — MBTA News", "url": "https://www.mbta.com/news/2018-03-12/new-silver-line-3-chelsea-service-between-chelsea-and-south-station" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20251116222555/https://www.mbta.com/news/2018-03-12/new-silver-line-3-chelsea-service-between-chelsea-and-south-station", "kind": "primary", "quote": "The MBTA is pleased to announce the brand new Silver Line 3-Chelsea route will operate between South Station and the Chelsea and East Boston communities beginning Saturday, April 21, 2018.", "tier": "primary", "title": "New Silver Line 3-Chelsea Service between Chelsea and South Station — MBTA News", "url": "https://www.mbta.com/news/2018-03-12/new-silver-line-3-chelsea-service-between-chelsea-and-south-station" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "A separate SL3 route to Chelsea – originally planned as part of the cancelled Urban Ring Project – began service on April 21, 2018.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20251222011512/https://en.wikipedia.org/wiki/Chelsea_station_(MBTA)", "kind": "wikipedia", "quote": "A $33.8 million construction contract was approved in September 2014, and construction began in March 2015. ... Silver Line service to Chelsea on the SL3 route began on April 21, 2018.", "tier": "tertiary", "title": "Chelsea station (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Chelsea_station_(MBTA)" } ], "stationCount": 4 } ], "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "On December 31, 2004, service began on routes SL2 to the Boston Marine Industrial Park and route SL3 to City Point – the latter running via Northern Avenue, Drydock Avenue, and Summer Street.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" } ] }, { "cityId": "boston", "color": "#7C878E", "displayNumber": "Silver-SL4", "id": "boston-line-Silver-SL4", "name": { "en": "Silver Line SL4" }, "phases": [ { "confidence": "medium", "geometryRef": null, "id": "boston-silver-sl4-2009", "kind": "initial", "label": { "en": "SL4 service introduced: Dudley (now Nubian) → South Station (surface route along Washington St / Essex St); original Washington Street Silver Line rebranded SL5" }, "notes": "SL4 is a bus rapid transit route, not a rail extension. It was created as a surface partial substitute after the cancelled Phase III tunnel that would have connected the Washington Street (Phase I) and Waterfront (Phase II) corridors. SL4 runs north on Washington Street from Dudley/Nubian, sharing the Washington Street busway with SL5 between Dudley/Nubian and Tufts Medical Center, then continues to Chinatown and east on Essex Street (dedicated lane) to a surface terminus across Atlantic Avenue from South Station. When SL4 began, the pre-existing Washington Street Silver Line (opened 20 July 2002, Phase I) was redesignated SL5. The southern terminus station 'Dudley' was renamed 'Nubian' effective June 2020 (square renamed Dec 2019; MBTA agreed Feb 2020) — a station rename, not a construction phase, so not listed as a separate phase here. Sources agree on the 13 October 2009 date. [Opening-date chase 2026-06-13] Day-level source conflict on the SL4 launch: Wikipedia states Oct 13, 2009 but attributes it to the Belcher MBTA Route History PDF, which actually states Oct 15, 2009 (Thursday); both archived Belcher versions agree on Oct 15. Year (2009) is not in dispute.", "opened": "2009-10-13", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611120943/https://www.liquisearch.com/silver_line_mbta/history/the_silver_line", "kind": "wikipedia", "quote": "A partial solution that did not require a new tunnel opened on October 13, 2009, after fast-track construction using federal stimulus money. The new route, SL4, covers much of the same ground as the proposed Phase III in a dedicated bus lane on the surface that terminates across Atlantic Avenue from South Station, allowing a somewhat circuitous pedestrian transfer between Phase I and Phase II.", "tier": "tertiary", "title": "Silver Line (MBTA) — History — The Silver Line (Liquisearch, mirroring Wikipedia)", "url": "https://www.liquisearch.com/silver_line_mbta/history/the_silver_line" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611120943/https://www.liquisearch.com/silver_line_mbta/history/the_silver_line", "kind": "wikipedia", "quote": "When SL4 began operation, the existing Silver Line Washington Street service was rebranded SL5.", "tier": "tertiary", "title": "Silver Line (MBTA) — History — The Silver Line (Liquisearch, mirroring Wikipedia)", "url": "https://www.liquisearch.com/silver_line_mbta/history/the_silver_line" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "The SL4 runs north on Washington Street to Chinatown, then east on Essex Street (with a dedicated lane) to a surface stop at South Station.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "In February 2020, the MBTA agreed to change the name of Dudley Square station to Nubian, following the December 2019 renaming of the square itself...The station renaming took effect in June 2020.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-13", "kind": "primary", "publisher": "Boston Street Railway Association", "quote": "On October 15, 2009, an additional Silver Line Washington St. service was added operating from Dudley to South Station, designated as Route SL4 Dudley-South Station.", "tier": "secondary", "title": "Changes to Transit Service in the MBTA district — archived April 4, 2026 version (Belcher, Boston Street Railway Association)", "url": "https://web.archive.org/web/20260528100638/http://roster.transithistory.org/MBTARouteHistory.pdf", "via": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" } ] } ], "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260611120943/https://www.liquisearch.com/silver_line_mbta/history/the_silver_line", "kind": "wikipedia", "quote": "A partial solution that did not require a new tunnel opened on October 13, 2009, after fast-track construction using federal stimulus money. The new route, SL4, covers much of the same ground as the proposed Phase III in a dedicated bus lane on the surface that terminates across Atlantic Avenue from South Station, allowing a somewhat circuitous pedestrian transfer between Phase I and Phase II.", "tier": "tertiary", "title": "Silver Line (MBTA) — History — The Silver Line (Liquisearch, mirroring Wikipedia)", "url": "https://www.liquisearch.com/silver_line_mbta/history/the_silver_line" } ] }, { "cityId": "boston", "color": "#7C878E", "displayNumber": "Silver-SL5", "id": "boston-line-Silver-SL5", "name": { "en": "Silver Line SL5" }, "phases": [ { "confidence": "medium", "constructionStart": "2001", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": false, "value": 27300000, "year": 2002 }, "notes": "Cost of the Washington Street corridor project: $27.3M total, including $10.9M for 17 new CNG buses, $10.9M for road work, and $2.6M for shelters. Environmental documentation filed 1998; construction began 2001. Service launched with 20 stops reduced to 11; a 12th stop at Worcester Square was restored in November 2002. At this date the service was branded simply 'Silver Line' (Washington Street); the SL5 designation was not applied until October 13, 2009. [Citation chase 2026-06-11] The $27.3M total is confirmed by the FTA's 2005 Demonstration Project Evaluation ($27,290,000 capital cost as of July 2005); it excludes $19.23M of road construction reimbursed by the Massachusetts Highway Department. Note the buses+soft-costs actually total ~$13.1M (the $10.9M figure is the bus-purchase line only).", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "On July 20, 2002, new Silver Line-branded CNG buses began operation – the first low-floor buses to operate in Boston – and the 20 stops were reduced to 11.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "Environmental documentation was filed in 1998, and construction began in 2001.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "The project cost $27.3 million, with major elements including $10.9 million for the 17 new buses, $10.9 million for road work, and $2.6 million for shelters.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "In November 2002, a twelfth stop at Worcester Square was restored.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20251230003330/https://nbrti.org/wp-content/uploads/2017/05/Boston_Silver_Line_final_report.pdf", "kind": "primary", "publisher": "Federal Transit Administration", "quote": "Including vehicle costs, the total capital cost was $27.3 million, or $5.77 million per directional route mile.", "tier": "secondary", "title": "Boston Silver Line Washington Street Bus Rapid Transit (BRT): Demonstration Project Evaluation", "url": "https://nbrti.org/wp-content/uploads/2017/05/Boston_Silver_Line_final_report.pdf", "via": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" } ] }, "geometryRef": null, "id": "boston-silver-sl5-2002", "kind": "initial", "label": { "en": "Washington Street Silver Line service opens: Dudley → Downtown Crossing (later designated SL5)" }, "notes": "[Date chase 2026-06-12] Construction-start year 2001 independently corroborated by the FTA's primary-source Boston Silver Line Washington Street BRT Demonstration Project Evaluation (Sept 2005), which lists 'Start of construction (2001)' in its project development schedule. [Opening-date chase 2026-06-13] NBRTI/FTA primary evaluation report calls July 20, 2002 the 'official launch' (CNG buses deployed, stops reduced 20->11); distinguishes it from prior infrastructure milestones (contraflow lane Dec 2001, construction start 2001). Official launch and start of revenue service are the same date; no separate ceremonial pre-opening.", "opened": "2002-07-20", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "On July 20, 2002, new Silver Line-branded CNG buses began operation – the first low-floor buses to operate in Boston – and the 20 stops were reduced to 11.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "Environmental documentation was filed in 1998, and construction began in 2001.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "The project cost $27.3 million, with major elements including $10.9 million for the 17 new buses, $10.9 million for road work, and $2.6 million for shelters.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "In November 2002, a twelfth stop at Worcester Square was restored.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20251230003330/https://nbrti.org/wp-content/uploads/2017/05/Boston_Silver_Line_final_report.pdf", "kind": "primary", "publisher": "Federal Transit Administration", "quote": "The project design drawings were completed in 2001 and construction began that year. [...] Start of construction (2001)", "tier": "primary", "title": "Boston Silver Line Washington Street Bus Rapid Transit (BRT): Demonstration Project Evaluation", "url": "https://nbrti.org/wp-content/uploads/2017/05/Boston_Silver_Line_final_report.pdf", "via": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" } ], "stationCount": 11 }, { "confidence": "medium", "geometryRef": null, "id": "boston-silver-sl5-2009", "kind": "renumber", "label": { "en": "Washington Street service renamed Route SL5 (concurrent with new SL4 to South Station)" }, "notes": "[Opening-date chase 2026-06-13] This phase is a route renaming (Dudley-Downtown Crossing redesignated SL5), not a new segment opening, effective Oct 13, 2009 concurrent with the SL4 launch. No newly-chased via-attributed sources beyond those already curated.", "opened": "2009-10-13", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20251117030911/https://www.mbta.com/news/2009-10-13/patrick-murray-administration-mayor-menino-launch-silver-line-direct-connect", "kind": "primary", "quote": "The existing Silver Line service between Dudley Station and Downtown Crossing with stops at Temple Place and Boylston Street, has been renamed Route SL5.", "tier": "primary", "title": "Patrick-Murray Administration, Mayor Menino Launch Silver Line Direct Connect Service to South Station — MBTA", "url": "https://www.mbta.com/news/2009-10-13/patrick-murray-administration-mayor-menino-launch-silver-line-direct-connect" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20251117030911/https://www.mbta.com/news/2009-10-13/patrick-murray-administration-mayor-menino-launch-silver-line-direct-connect", "kind": "primary", "quote": "Posted on October 13, 2009", "tier": "primary", "title": "Patrick-Murray Administration, Mayor Menino Launch Silver Line Direct Connect Service to South Station — MBTA", "url": "https://www.mbta.com/news/2009-10-13/patrick-murray-administration-mayor-menino-launch-silver-line-direct-connect" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "On October 13, 2009, this service was re-designated the SL5; a new SL4 service was added between Dudley and South Station.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" } ] } ], "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200857/https://en.wikipedia.org/wiki/Silver_Line_(MBTA)", "kind": "wikipedia", "quote": "On July 20, 2002, new Silver Line-branded CNG buses began operation – the first low-floor buses to operate in Boston – and the 20 stops were reduced to 11.", "tier": "tertiary", "title": "Silver Line (MBTA) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Silver_Line_(MBTA)" } ] }, { "cityId": "boston", "color": "#DA291C", "displayNumber": "Mattapan", "id": "boston-line-Mattapan", "name": { "en": "Mattapan High Speed Line" }, "phases": [ { "confidence": "medium", "constructionStart": "1929", "geometryRef": "boston-Mattapan", "id": "boston-mattapan-1929", "kind": "initial", "label": { "en": "Stage 1 opens: Ashmont → Milton (high-speed streetcar line, initial section)" }, "notes": "Operated by the Boston Elevated Railway as a 'high-speed' streetcar (PCC-style trolley) line, built because full subway extension beyond Ashmont was deemed too costly. Dorchester Atheneum documents construction starting from Ashmont Terminal on 28 April 1929 and the Ashmont–Milton segment completed 22 August 1929, opening 26 August 1929. [Date chase 2026-06-12] Dorchester Atheneum gives a precise construction-start date of April 28, 1929 (work forces of the Transit Department and the Elevated mobilized building the line from Ashmont Terminal), confirming the 1929 year. [Opening-date chase 2026-06-13] Public revenue opening Aug 26, 1929; Dorchester Atheneum notes it began as a temporary wooden platform at Milton with part-time service (not ceremonial-only).", "opened": "1929-08-26", "segment": { "fromStopIndex": 4, "toStopIndex": 7 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200959/https://en.wikipedia.org/wiki/Mattapan_Line", "kind": "wikipedia", "quote": "The line opened from Ashmont to Milton on August 26, 1929", "tier": "tertiary", "title": "Mattapan Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Mattapan_Line" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20250417212606/https://www.dorchesteratheneum.org/project/mattapan-trolley-high-speed-the-mattapan-ashmont-story/", "kind": "other", "quote": "August 26, 1929: First section opened from Ashmont to Milton Station ... Construction began from Ashmont Terminal April 28, 1929; section from Ashmont to Milton completed August 22, 1929.", "tier": "secondary", "title": "Mattapan Trolley: High-Speed, the Mattapan-Ashmont Story — Dorchester Atheneum", "url": "https://www.dorchesteratheneum.org/project/mattapan-trolley-high-speed-the-mattapan-ashmont-story/" } ] }, { "confidence": "medium", "geometryRef": "boston-Mattapan", "id": "boston-mattapan-1929-2", "kind": "extension", "label": { "en": "Stage 2 opens: Milton → Mattapan (line completed to Mattapan)" }, "notes": "Completed the line to its present Mattapan terminus. [Opening-date chase 2026-06-13] Dec 21, 1929 confirmed as revenue opening of full line: first revenue car departed Mattapan at 5:05 AM (motorman 'Bob' Nelson).", "opened": "1929-12-21", "segment": { "fromStopIndex": 0, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200959/https://en.wikipedia.org/wiki/Mattapan_Line", "kind": "wikipedia", "quote": "and from Milton to Mattapan on December 21, 1929", "tier": "tertiary", "title": "Mattapan Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Mattapan_Line" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20250417212606/https://www.dorchesteratheneum.org/project/mattapan-trolley-high-speed-the-mattapan-ashmont-story/", "kind": "other", "quote": "December 21, 1929: Entire line opened to Mattapan. At 5:05 A.M., motorman 'Bob' Nelson left Mattapan with the first revenue car to Ashmont.", "tier": "secondary", "title": "Mattapan Trolley: High-Speed, the Mattapan-Ashmont Story — Dorchester Atheneum", "url": "https://www.dorchesteratheneum.org/project/mattapan-trolley-high-speed-the-mattapan-ashmont-story/" } ] }, { "confidence": "low", "geometryRef": null, "id": "boston-mattapan-1930", "kind": "extension", "label": { "en": "Infill station opens: Capen Street" }, "notes": "Infill station added to the existing line; only month (September 1930) is documented, not an exact day. [Opening-date chase 2026-06-13] Sep 1930 (month precision) for Capen Street infill station rests on a single source chain (Wikipedia citing Belcher PDF, currently inaccessible); Dorchester Atheneum mentions the station but gives no opening date.", "opened": "1930-09", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200959/https://en.wikipedia.org/wiki/Mattapan_Line", "kind": "wikipedia", "quote": "Infill stations were opened at Capen Street in September 1930 and Butler on October 7, 1931.", "tier": "tertiary", "title": "Mattapan Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Mattapan_Line" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": null, "id": "boston-mattapan-1931", "kind": "extension", "label": { "en": "Infill station opens: Butler" }, "notes": "Second infill station. [Opening-date chase 2026-06-13] Oct 7, 1931 confirmed by both sources for Butler station platform opening.", "opened": "1931-10-07", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200959/https://en.wikipedia.org/wiki/Mattapan_Line", "kind": "wikipedia", "quote": "Infill stations were opened at Capen Street in September 1930 and Butler on October 7, 1931.", "tier": "tertiary", "title": "Mattapan Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Mattapan_Line" }, { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20250417212606/https://www.dorchesteratheneum.org/project/mattapan-trolley-high-speed-the-mattapan-ashmont-story/", "kind": "other", "quote": "Butler Street Station: The platform was opened on October 7, 1931.", "tier": "secondary", "title": "Mattapan Trolley: High-Speed, the Mattapan-Ashmont Story — Dorchester Atheneum", "url": "https://www.dorchesteratheneum.org/project/mattapan-trolley-high-speed-the-mattapan-ashmont-story/" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": null, "id": "boston-mattapan-1966", "kind": "renumber", "label": { "en": "Red Line designation applied (renumbered from Route 28 Mattapan–Ashmont)" }, "notes": "Branding change under the MBTA: the line, previously known as Route 28 Mattapan–Ashmont, became associated with the Red Line (as a connecting high-speed trolley branch). No physical change. [Opening-date chase 2026-06-13] 1966 is an administrative/branding event (Red Line designation applied), not a revenue-service opening; supported only by a single source chain (Wikipedia citing Belcher PDF, inaccessible).", "opened": "1966", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200959/https://en.wikipedia.org/wiki/Mattapan_Line", "kind": "wikipedia", "quote": "In 1966, the Red Line designation was also applied to the line, which had been known as 28 Mattapan–Ashmont.", "tier": "tertiary", "title": "Mattapan Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Mattapan_Line" } ] }, { "closed": "2006-06-24", "confidence": "medium", "geometryRef": null, "id": "boston-mattapan-2007", "kind": "reopening", "label": { "en": "Line closed for reconstruction (Ashmont station rebuild + accessibility upgrades); reopens" }, "notes": "Line closed with shuttle buses substituting; work included a new elevated loop at Ashmont (part of the larger Ashmont station reconstruction), canopy replacement at Mattapan, rebuilding of intermediate stations, and accessibility upgrades (all stations except Valley Road). No clean line-only construction cost is reliably sourced: search surfaced a ~$6.2M contract attributed specifically to replacing the 1929-built Mattapan station and a separate $7.9M (2017) fleet-overhaul figure, but neither is a documented total for the 2006–07 reconstruction, so cost is omitted rather than guessed. [Opening-date chase 2026-06-13] Reopening (after 2006-2007 reconstruction) confirmed at full-day precision by MBTA's own press release: 'Service resumed Saturday, December 22nd.'", "opened": "2007-12-22", "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200959/https://en.wikipedia.org/wiki/Mattapan_Line", "kind": "wikipedia", "quote": "June 24, 2006, to December 22, 2007, with shuttle buses replacing streetcar service.", "tier": "tertiary", "title": "Mattapan Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Mattapan_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260418201013/https://www.mbta.com/news/2007-12-20/mattapan-trolley-re-opens", "kind": "primary", "publisher": "Massachusetts Bay Transportation Authority (MBTA)", "quote": "Service resumed Saturday, December 22nd", "tier": "primary", "title": "Mattapan Trolley Re-opens — MBTA Press Release", "url": "https://www.mbta.com/news/2007-12-20/mattapan-trolley-re-opens", "via": "https://en.wikipedia.org/wiki/Mattapan_Line" } ] } ], "sources": [ { "accessedAt": "2026-06-10", "archivedUrl": "https://web.archive.org/web/20260418200959/https://en.wikipedia.org/wiki/Mattapan_Line", "kind": "wikipedia", "quote": "Steam trains were discontinued in 1927 and the line was closed for two years while it was modified for streetcars.", "tier": "tertiary", "title": "Mattapan Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Mattapan_Line" } ] } ], "name": { "en": "Boston" } }, { "bbox": [ 12.46, 55.6, 12.67, 55.72 ], "center": [ 12.565, 55.668 ], "country": "Denmark", "defaultZoom": 11, "homeCurrency": "DKK", "id": "copenhagen", "lines": [ { "cityId": "copenhagen", "color": "#007d58", "displayNumber": "M1", "id": "copenhagen-line-m1", "name": { "da": "Vestamagerlinjen", "en": "M1 (Vanløse ↔ Vestamager)" }, "phases": [ { "confidence": "medium", "constructionStart": "1996", "cost": { "basis": "estimate", "confidence": "low", "nominal": { "currency": "DKK", "isEstimate": true, "value": 5700000000, "year": 2002 }, "notes": "≈ half of the ~DKK 11–12 billion original Ørestad Metro (M1+M2 stages 1–2, 2002–03). Sources vary widely — some cite ≈DKK 6.7bn (~€900m) for core construction, while broader project figures including Ørestad land development reach ≈DKK 21bn. The 50/50 split between the M1 and M2 branches is indicative. [Citation chase 2026-06-11] No source gives a Stage-1-specific cost; the closest verified actual outturn is DKK 12.1bn for the full M1+M2 system (stages 1–3, 2002–2007) per Danish Wikipedia, corroborated by Flyvbjerg et al. (2008) at ~DKK 11.4bn for the 21 km phases 1–3. A mid-1990s planning estimate of ~DKK 5.5bn covered the whole project (not Stage 1) before scope/cost escalated. The English Wikipedia article attached as the source carries no cost figure (citation-needed tag).", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260518202249/https://en.wikipedia.org/wiki/Copenhagen_Metro", "kind": "wikipedia", "tier": "tertiary", "title": "Copenhagen Metro — Wikipedia", "url": "https://en.wikipedia.org/wiki/Copenhagen_Metro" } ] }, "geometryRef": "copenhagen-M1", "id": "copenhagen-m1-2002", "kind": "initial", "label": { "en": "Stage 1 opens: Nørreport → Vestamager" }, "notes": "[Date chase 2026-06-12] Construction start of November 1996 (pipe/wire relocation around stations; mainline work began Sept 1997) is attested by both the M1 and Copenhagen Metro Wikipedia articles, both citing Jensen, 'Metro undervejs', Jernbanen no. 5/2002. The Jernbanen PDF archive and the official Metroselskabet history page are now dead links; year 1996 is independently corroborated by the tertiary Railize source.", "opened": "2002-10-19", "segment": { "fromStopIndex": 6, "toStopIndex": 14 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260518202249/https://en.wikipedia.org/wiki/Copenhagen_Metro", "kind": "wikipedia", "quote": "The section from Nørreport to Lergravsparken and Vestamager was opened on 19 October 2002.", "tier": "tertiary", "title": "Copenhagen Metro — Wikipedia (Stage 1 opened 19 Oct 2002)", "url": "https://en.wikipedia.org/wiki/Copenhagen_Metro" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260512160604/https://da.wikipedia.org/wiki/K%C3%B8benhavns_Metro", "kind": "other", "publisher": "Wikipedia (Danish)", "quote": "den 19. oktober 2002", "tier": "tertiary", "title": "Københavns Metro — Danish Wikipedia", "url": "https://da.wikipedia.org/wiki/K%C3%B8benhavns_Metro", "via": "https://en.wikipedia.org/wiki/M1_(Copenhagen_Metro)" } ], "stationCount": 9 }, { "confidence": "medium", "geometryRef": "copenhagen-M1", "id": "copenhagen-m1-2003-05", "kind": "extension", "label": { "en": "Stage 2A: extended west Nørreport → Frederiksberg" }, "notes": "[Opening-date chase 2026-06-13] Bus schedule changes along the corridor took effect 25 May 2003, but the metro itself opened 29 May 2003 to fit Queen Margrethe II's ceremonial inauguration calendar (causing four days without bus service); 29 May is the public revenue-service opening, not VIP-only.", "opened": "2003-05-29", "segment": { "fromStopIndex": 4, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260518202249/https://en.wikipedia.org/wiki/Copenhagen_Metro", "kind": "wikipedia", "quote": "stage 2A from Nørreport to Frederiksberg, began on 24 February. It opened on 29 May 2003.", "tier": "tertiary", "title": "Copenhagen Metro — Wikipedia (Stage 2A opened 29 May 2003)", "url": "https://en.wikipedia.org/wiki/Copenhagen_Metro" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260512160604/https://da.wikipedia.org/wiki/K%C3%B8benhavns_Metro", "kind": "other", "publisher": "Wikipedia (Danish)", "quote": "den 29. maj 2003", "tier": "tertiary", "title": "Københavns Metro — Danish Wikipedia", "url": "https://da.wikipedia.org/wiki/K%C3%B8benhavns_Metro", "via": "https://en.wikipedia.org/wiki/M1_(Copenhagen_Metro)" } ], "stationCount": 2 }, { "confidence": "medium", "geometryRef": "copenhagen-M1", "id": "copenhagen-m1-2003-10", "kind": "extension", "label": { "en": "Stage 2B: extended west Frederiksberg → Vanløse" }, "notes": "[Opening-date chase 2026-06-13] Flintholm station on this segment did not open with the rest of Stage 2B; it opened later on 24 January 2004. The 12 October 2003 date correctly represents the Frederiksberg-Vanløse segment opening (except Flintholm).", "opened": "2003-10-12", "segment": { "fromStopIndex": 0, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260518202249/https://en.wikipedia.org/wiki/Copenhagen_Metro", "kind": "wikipedia", "quote": "Stage 2, from Nørreport to Vanløse, opened in 2003 ... Stage 2B, from Frederiksberg to Vanløse, opened on 12 October.", "tier": "tertiary", "title": "Copenhagen Metro — Wikipedia (Vanløse extension opened 12 Oct 2003)", "url": "https://en.wikipedia.org/wiki/Copenhagen_Metro" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260512160604/https://da.wikipedia.org/wiki/K%C3%B8benhavns_Metro", "kind": "other", "publisher": "Wikipedia (Danish)", "quote": "den 12. oktober 2003", "tier": "tertiary", "title": "Københavns Metro — Danish Wikipedia", "url": "https://da.wikipedia.org/wiki/K%C3%B8benhavns_Metro", "via": "https://en.wikipedia.org/wiki/M1_(Copenhagen_Metro)" } ], "stationCount": 4 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260611121521/https://en.wikipedia.org/wiki/M1_(Copenhagen_Metro)", "kind": "wikipedia", "tier": "tertiary", "title": "M1 (Copenhagen Metro) — Wikipedia", "url": "https://en.wikipedia.org/wiki/M1_(Copenhagen_Metro)" } ] }, { "cityId": "copenhagen", "color": "#fdc110", "displayNumber": "M2", "id": "copenhagen-line-m2", "name": { "da": "Lufthavnslinjen", "en": "M2 (Vanløse ↔ Lufthavnen)" }, "phases": [ { "confidence": "high", "constructionStart": "1996", "cost": { "basis": "estimate", "confidence": "low", "nominal": { "currency": "DKK", "isEstimate": true, "value": 5700000000, "year": 2002 }, "notes": "≈ half of the ~DKK 11–12 billion original Ørestad Metro (M1+M2 stages 1–2, 2002–03). The 50/50 split between the M1 and M2 branches is indicative; see the M1 phase note for the range of published figures. [Citation chase 2026-06-11] The only sourced figures cover the entire first phase (M1+M2, stages 1–2): a DKK 9.7B budget that rose to a DKK 12.1B final outturn (Berlingske 2007); no source gives a per-branch or per-stage split, so the 5.7B M2-Stage-1 value is the curator's indicative derivation only. The currently attached English Wikipedia article contains no such cost figure; the narrative originates from Danish Wikipedia (Københavns Metro), which should be cited instead.", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260518202249/https://en.wikipedia.org/wiki/Copenhagen_Metro", "kind": "wikipedia", "tier": "tertiary", "title": "Copenhagen Metro — Wikipedia", "url": "https://en.wikipedia.org/wiki/Copenhagen_Metro" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20221116111519/https://www.berlingske.dk/samfund/lufthavns-metro-kommer-til-tiden", "kind": "news", "publisher": "Berlingske", "quote": "Prisen på den første del af metroen skred fra et budget på 9,7 milliarder kroner til en slutpris på 12,1 milliarder kroner", "tier": "secondary", "title": "Lufthavns-metro kommer til tiden", "url": "https://www.berlingske.dk/samfund/lufthavns-metro-kommer-til-tiden", "via": "https://da.wikipedia.org/wiki/K%C3%B8benhavns_Metro" } ] }, "geometryRef": "copenhagen-M2", "id": "copenhagen-m2-2002", "kind": "initial", "label": { "en": "Stage 1 opens: Nørreport → Lergravsparken" }, "notes": "[Date chase 2026-06-12] The M2 infobox separately lists 'construction commenced 1998', which refers to main tunnel boring from Islands Brygge (Feb 1998); the curated 1996 correctly reflects the earlier first ground-disturbing work (pipe/wire relocation). [Opening-date chase 2026-06-13] Public and official opening were concurrent on 19 Oct 2002 (inauguration with the Queen, revenue service same day).", "opened": "2002-10-19", "segment": { "fromStopIndex": 6, "toStopIndex": 10 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260518202249/https://en.wikipedia.org/wiki/Copenhagen_Metro", "kind": "wikipedia", "quote": "The section from Nørreport to Lergravsparken and Vestamager was opened on 19 October 2002.", "tier": "tertiary", "title": "Copenhagen Metro — Wikipedia (Stage 1 opened 19 Oct 2002)", "url": "https://en.wikipedia.org/wiki/Copenhagen_Metro" }, { "accessedAt": "2026-06-12", "kind": "other", "publisher": "Jernbaneklub.dk / Jernbanen", "quote": "Construction started in November 1996 [cited source for this claim in M2 Wikipedia article via ]", "tier": "secondary", "title": "Metro undervejs — Jernbanen journal no. 5, 2002 (Tommy O. Jensen)", "url": "https://web.archive.org/web/20110719124850/http://www.jernbaneklub.dk/jernbanen/2002/blad5-2002bag-om-metroen-ny4.pdf", "via": "https://en.wikipedia.org/wiki/M2_(Copenhagen_Metro)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260122002508/https://myldretid.dk/nyheder/nr/243", "kind": "news", "publisher": "Myldretid (Thomas de Laine)", "quote": "Indvielsen fandt sted med dronning osv. lørdag d. 19. oktober, og denne dag og den næstfølgende gik med indvielsesarrangementer, prøveture og motionsløb.", "tier": "secondary", "title": "To måneder med metro — Myldretid", "url": "http://myldretid.dk/nyheder/nr/243", "via": "https://en.wikipedia.org/wiki/M2_(Copenhagen_Metro)" } ], "stationCount": 5 }, { "confidence": "medium", "geometryRef": "copenhagen-M2", "id": "copenhagen-m2-2003-05", "kind": "extension", "label": { "en": "Stage 2A: extended west Nørreport → Frederiksberg" }, "notes": "[Opening-date chase 2026-06-13] Trial runs through to Frederiksberg began 24 Feb 2003 with empty test trains; revenue opening was 29 May 2003 (date set by Queen Margrethe II's calendar).", "opened": "2003-05-29", "segment": { "fromStopIndex": 4, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260518202249/https://en.wikipedia.org/wiki/Copenhagen_Metro", "kind": "wikipedia", "quote": "The extension from Nørreport to Frederiksberg became operational, following trial runs beginning February 24, 2003.", "tier": "tertiary", "title": "Copenhagen Metro — Wikipedia (Stage 2A opened 29 May 2003)", "url": "https://en.wikipedia.org/wiki/Copenhagen_Metro" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251209081811/https://myldretid.dk/nyheder/nr/254", "kind": "news", "publisher": "Myldretid (Thomas de Laine)", "quote": "Ørestadsselskabet offentliggjorde 25. marts, at metroens etape 2a Nørreport-Forum-Frederiksberg åbner torsdag d. 29. maj, Kristi Himmelfartsdag.", "tier": "secondary", "title": "Metro til Frederiksberg åbner 29. maj — Myldretid", "url": "http://myldretid.dk/nyheder/nr/254", "via": "https://en.wikipedia.org/wiki/M2_(Copenhagen_Metro)" } ], "stationCount": 2 }, { "confidence": "medium", "geometryRef": "copenhagen-M2", "id": "copenhagen-m2-2003-10", "kind": "extension", "label": { "en": "Stage 2B: extended west Frederiksberg → Vanløse" }, "notes": "[Opening-date chase 2026-06-13] Flintholm station was not ready and opened in early 2004; trains initially ran through without stopping. Low-key inauguration (no Queen) as the route reused a converted S-train line.", "opened": "2003-10-12", "segment": { "fromStopIndex": 0, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260518202249/https://en.wikipedia.org/wiki/Copenhagen_Metro", "kind": "wikipedia", "quote": "The line extended from Frederiksberg to Vanløse, completing the common section for both M1 and M2.", "tier": "tertiary", "title": "Copenhagen Metro — Wikipedia (Vanløse extension opened 12 Oct 2003)", "url": "https://en.wikipedia.org/wiki/Copenhagen_Metro" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251218132738/https://myldretid.dk/nyheder/nr/269", "kind": "news", "publisher": "Myldretid (Thomas de Laine)", "quote": "Den 20. august vedtog Ørestadsselskabets bestyrelse, at metroens etape 2b, Frederiksberg-Solbjerg-Lindevang-Flintholm-Vanløse, åbner d. 12. oktober 2003 - mere end to måneder før hidtil planlagt.", "tier": "secondary", "title": "Metro til Vanløse allerede 12. oktober — Myldretid", "url": "http://myldretid.dk/nyheder/nr/269", "via": "https://en.wikipedia.org/wiki/M2_(Copenhagen_Metro)" } ], "stationCount": 4 }, { "confidence": "medium", "constructionStart": "2005", "cost": { "basis": "estimate", "confidence": "low", "nominal": { "currency": "DKK", "isEstimate": false, "value": 1700000000, "year": 2007 }, "notes": "Cost of the 4.5 km stage 3 from Lergravsparken to the airport. [Corrected 2026-06-12 after citation chase] The previously curated DKK 1.1bn appears in no source; the only contemporary figure isolating stage 3 is DKK 1.7bn, reported at opening as completed within budget (Myldretid, 28 Sep 2007). Adversarial panel confirmed the old value wrong (3 lenses). [Citation chase 2026-06-11] The only contemporary source isolating stage 3's cost (myldretid.dk, published at opening on 2007-09-28) reports 1.7 billion DKK, completed within budget — 55% above the curated 1.1 billion figure, which appears in no source; consider revising the value to ~1.7 billion DKK pending a primary source (Metroselskabet/Ørestadsselskabet report).", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260518202249/https://en.wikipedia.org/wiki/Copenhagen_Metro", "kind": "wikipedia", "tier": "tertiary", "title": "Copenhagen Metro — Wikipedia (stage 3, 4.5 km, opened 28 Sep 2007)", "url": "https://en.wikipedia.org/wiki/Copenhagen_Metro" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20260122013207/https://myldretid.dk/nyheder/nr/482", "kind": "news", "publisher": "Myldretid (Thomas de Laine)", "quote": "Tredje etape har kostet 1,7 mia. kr., er gennemført inden for budgettet og åbnede lidt før tiden.", "tier": "secondary", "title": "Metro til Lufthavnen indviet", "url": "https://myldretid.dk/nyheder/nr/482", "via": "https://en.wikipedia.org/wiki/Copenhagen_Metro" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260122013207/https://myldretid.dk/nyheder/nr/482", "kind": "news", "publisher": "Myldretid (Thomas de Laine)", "quote": "Tredje etape har kostet 1,7 mia. kr., er gennemført inden for budgettet og åbnede lidt før tiden.", "tier": "secondary", "title": "Metro til Lufthavnen indviet", "url": "https://myldretid.dk/nyheder/nr/482", "via": "https://en.wikipedia.org/wiki/Copenhagen_Metro" } ] }, "geometryRef": "copenhagen-M2", "id": "copenhagen-m2-2007", "kind": "extension", "label": { "en": "Stage 3: extended to Copenhagen Airport (Lergravsparken → Lufthavnen)" }, "notes": "[Date chase 2026-06-12] Stage 3 (airport extension) decision was made March 2001 by Copenhagen County Council; financing agreed 12 April 2002. The actual physical construction-start year is not documented in the available Wikipedia sources; the curated 2005 should be flagged as low-confidence pending a primary source on groundbreaking. [Opening-date chase 2026-06-13] Crown Prince Frederik cut the ribbon at 14:51 on 28 Sep 2007; revenue ('passagerførende') trains started immediately after, with free travel the rest of the day.", "opened": "2007-09-28", "segment": { "fromStopIndex": 10, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260518202249/https://en.wikipedia.org/wiki/Copenhagen_Metro", "kind": "wikipedia", "quote": "The 4.5 km airport extension from Lergravsparken opened, largely following the former Amager railway corridor.", "tier": "tertiary", "title": "Copenhagen Metro — Wikipedia (airport extension opened 28 Sep 2007)", "url": "https://en.wikipedia.org/wiki/Copenhagen_Metro" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260122013207/https://myldretid.dk/nyheder/nr/482", "kind": "news", "publisher": "Myldretid (Thomas de Laine)", "quote": "Det var lidt koldt, noget blæsende og temmelig gråt, da metroens forlængelse til Lufthavnen blev indviet fredag 28. september. [...] kronprinsen efter taler af bl.a. Ørestadsselskabets bestyrelsesformand Henning Christophersen kunne klippe den røde snor kl. 14.51. Kort efter begyndte de passagerførende tog at køre.", "tier": "secondary", "title": "Metro til Lufthavnen indviet — Myldretid", "url": "http://myldretid.dk/nyheder/nr/482", "via": "https://en.wikipedia.org/wiki/M2_(Copenhagen_Metro)" } ], "stationCount": 5 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251231133619/https://en.wikipedia.org/wiki/M2_(Copenhagen_Metro)", "kind": "wikipedia", "tier": "tertiary", "title": "M2 (Copenhagen Metro) — Wikipedia", "url": "https://en.wikipedia.org/wiki/M2_(Copenhagen_Metro)" } ] }, { "cityId": "copenhagen", "color": "#ff0a0a", "displayNumber": "M3", "id": "copenhagen-line-m3", "name": { "da": "Cityringen", "en": "M3 City Circle Line" }, "phases": [ { "confidence": "high", "constructionStart": "2011", "cost": { "basis": "outturn", "confidence": "low", "nominal": { "currency": "DKK", "isEstimate": false, "value": 22400000000, "year": 2019 }, "notes": "Actual outturn ≈ DKK 22.4 billion (≈ €3.0 billion). Approved by the Danish Parliament in 2007 at ≈ DKK 15bn, revised to ≈ DKK 21.3bn (2010 prices) when the civil-works contract was awarded to Copenhagen Metro Team in Jan 2011; tunnelling began 2013, the 15.5 km loop opened 29 Sep 2019. A ≈ DKK 25.3bn (2019 prices) figure also circulates but was not independently confirmed on re-verification — using the ≈22.4bn outturn. See research.json. [Citation chase 2026-06-11] Re-verification caveat: the DKK 22.4bn outturn is not stated in any currently attached/cited source — all of them (Railway Technology, Wikipedia, Railway Gazette 2010) support only the DKK 21.3bn (2010-price) contract-award estimate. Confirming the 22.4bn outturn requires a primary Metroselskabet annual report or Danish government source, which should be added before raising confidence.", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260415041953/https://www.railway-technology.com/projects/cityringen-metro-copenhagen/", "kind": "other", "quote": "Tunnelling of the two 15.5km parallel tunnels started in 2013.", "tier": "secondary", "title": "Cityringen Metro, Copenhagen — Railway Technology", "url": "https://www.railway-technology.com/projects/cityringen-metro-copenhagen/" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260211062536/https://en.wikipedia.org/wiki/M3_(Copenhagen_Metro)", "kind": "wikipedia", "quote": "The total cost was estimated at 15 billion kroner but had risen to 21.3 billion kroner ($3.39 billion) when the contractors were announced in late 2010.", "tier": "secondary", "title": "M3 (Copenhagen Metro) — Wikipedia", "url": "https://en.wikipedia.org/wiki/M3_(Copenhagen_Metro)" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20200815105924/https://www.railwaygazette.com/nc/news/single-view/view/koebenhavn-cityringen-contractors-selected.html", "kind": "news", "publisher": "Railway Gazette International", "quote": "At a board meeting on November 24 København metro authority Metroselskabet selected the Salini-led Copenhagen Metro Team consortium as preferred bidder to build the infrastructure and Ansaldo STS to supply rolling stock and railway equipment for the city's DKr21·3bn Cityringen driverless metro project.", "tier": "secondary", "title": "København Cityringen contractors selected", "url": "http://www.railwaygazette.com/nc/news/single-view/view/koebenhavn-cityringen-contractors-selected.html", "via": "https://en.wikipedia.org/wiki/M3_(Copenhagen_Metro)" } ] }, "geometryRef": "copenhagen-M3", "id": "copenhagen-m3-2019", "kind": "initial", "label": { "en": "Cityringen opens: 17-station underground loop" }, "notes": "[Date chase 2026-06-12] Tunnel boring (TBMs) began in 2013 per Wikipedia, but that is a sub-phase within the broader construction programme that started in 2011 (civil engineering contract awarded 7 Jan 2011). The COWI and Ramboll project pages cited in Wikipedia are dead (HTTP 404). [Opening-date chase 2026-06-13] TV 2 article published 07:05 on 29 Sep 2019 confirms this was the public revenue-service opening ('slår dørene op for offentligheden'), not a prior ceremony.", "opened": "2019-09-29", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260211062536/https://en.wikipedia.org/wiki/M3_(Copenhagen_Metro)", "kind": "wikipedia", "quote": "The line opened on 29 September 2019.", "tier": "secondary", "title": "M3 (Copenhagen Metro) — Wikipedia (opened 29 Sep 2019, 17 stations)", "url": "https://en.wikipedia.org/wiki/M3_(Copenhagen_Metro)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260415041953/https://www.railway-technology.com/projects/cityringen-metro-copenhagen/", "kind": "other", "publisher": "Railway Technology", "quote": "The Danish Parliament approved the circle line project in mid-2007 while the construction works began in 2011. Construction Started: 2011", "tier": "secondary", "title": "Cityringen Metro, Copenhagen — Railway Technology", "url": "https://www.railway-technology.com/projects/cityringen-metro-copenhagen/", "via": "https://en.wikipedia.org/wiki/M3_(Copenhagen_Metro)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260422024404/https://nyheder.tv2.dk/samfund/2019-09-29-13-ting-du-maaske-ikke-vidste-om-den-nye-metrolinje", "kind": "news", "publisher": "TV 2 Nyheder", "quote": "Søndag slår Cityringen dørene op for offentligheden (Sunday, Cityringen opens its doors to the public) — article published 2019-09-29", "tier": "secondary", "title": "13 ting du måske ikke vidste om den nye metrolinje — TV 2 Nyheder", "url": "https://nyheder.tv2.dk/samfund/2019-09-29-13-ting-du-maaske-ikke-vidste-om-den-nye-metrolinje", "via": "https://en.wikipedia.org/wiki/M3_(Copenhagen_Metro)" } ], "stationCount": 17 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260211062536/https://en.wikipedia.org/wiki/M3_(Copenhagen_Metro)", "kind": "wikipedia", "tier": "tertiary", "title": "M3 (Copenhagen Metro) — Wikipedia", "url": "https://en.wikipedia.org/wiki/M3_(Copenhagen_Metro)" } ] }, { "cityId": "copenhagen", "color": "#36b6f1", "displayNumber": "M4", "id": "copenhagen-line-m4", "name": { "da": "Havnelinjen", "en": "M4 Harbour Line" }, "phases": [ { "confidence": "medium", "constructionStart": "2016", "cost": { "basis": "estimate", "confidence": "low", "nominal": { "currency": "DKK", "isEstimate": true, "value": 2300000000, "year": 2020 }, "notes": "Cost of the new Nordhavn branch (two new stations, Nordhavn and Orientkaj) ≈ €310m ≈ DKK 2.3bn at 2020 rates. The 2020 service reused the existing M3 ring tracks between Østerport and København H, so only the Nordhavn spur was newly built. [Citation chase 2026-06-11] The sole supporting source (IRJ) quotes the branch cost as \"an estimated €310m\"; the DKK 2.3bn value is a curator currency conversion, not a figure stated in any source, and no independent corroborating source was found — hence the estimate flag and low confidence.", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20250906100203/https://www.railjournal.com/passenger/metros/copenhagen-opens-nordhavn-metro-extension/", "kind": "news", "title": "Copenhagen opens Nordhavn metro extension — International Railway Journal", "url": "https://www.railjournal.com/passenger/metros/copenhagen-opens-nordhavn-metro-extension/" } ] }, "geometryRef": "copenhagen-M4", "id": "copenhagen-m4-2020", "kind": "initial", "label": { "en": "M4 opens: Orientkaj → København H (Nordhavn branch)" }, "notes": "[Date chase 2026-06-12] Construction-start 2016 for the Nordhavn branch remains unconfirmed at year granularity: primary Metroselskabet press releases and Wikipedia attest only to 2012 Parliament approval and 2014 contract signing. The 2015-2016 Metroselskabet press archive (where a groundbreaking notice would appear) is no longer in the live or archived sitemap.", "opened": "2020-03-28", "segment": { "fromStopIndex": 0, "toStopIndex": 7 }, "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260210123101/https://metroselskabet.dk/en/contact-and-press/press/press-releases/nordhavn-to-be-connected-to-the-metro-network-on-28-march/", "kind": "primary", "quote": "On Saturday 28 March 2020, the new M4 metro line will open. ... With the opening of the M4, the Copenhagen metro network will add the two stations Orientkaj and Nordhavn.", "tier": "primary", "title": "Nordhavn to be connected to the Metro network on 28 March — Metroselskabet (press release)", "url": "https://metroselskabet.dk/en/contact-and-press/press/press-releases/nordhavn-to-be-connected-to-the-metro-network-on-28-march/" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251224103419/https://en.wikipedia.org/wiki/M4_(Copenhagen_Metro)", "kind": "wikipedia", "quote": "The M4 was opened on 28 March 2020 when two additional stations were opened in the Nordhavn district.", "tier": "tertiary", "title": "M4 (Copenhagen Metro) — Wikipedia (Nordhavn section opened 28 Mar 2020)", "url": "https://en.wikipedia.org/wiki/M4_(Copenhagen_Metro)" } ], "stationCount": 2 }, { "confidence": "medium", "constructionStart": "2018", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "DKK", "isEstimate": false, "value": 8600000000, "year": 2021 }, "notes": "Final construction cost DKK 8.6 billion (2021 prices) for the 5.7 km Sydhavn extension (five new stations: Havneholmen, Enghave Brygge, Sluseholmen, Mozarts Plads, København Syd / formerly Ny Ellebjerg) — about DKK 1.8bn under the DKK 10.4bn budget (incl. reserves). Construction 2018→2024; opened 22 Jun 2024. Cross-checked against Metroselskabet’s primary \"on time, on budget\" report; the figure was contested by the verification panel and confirmed by the Opus tiebreaker. [Citation chase 2026-06-11] The DKK 8.6bn figure is the actual construction outturn cost (vs the original DKK 10.4bn budget including reserves), per Metroselskabet's primary post-completion report. The stated 2021 price-year label is not explicitly confirmed by the primary source and likely reflects an earlier estimate vintage rather than the final report's basis.", "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260310163258/https://metroselskabet.dk/en/contact-and-press/press/press-releases/new-report-metroselskabet-delivered-mega-project-on-time-on-budget-and-with-far-more-passengers-than-expected/", "kind": "primary", "quote": "The total construction costs were DKK 8.6 billion ... the original construction budget was DKK 10.4 billion including reserves", "tier": "primary", "title": "New report: Metroselskabet delivered mega-project on time, on budget — Metroselskabet (press release)", "url": "https://metroselskabet.dk/en/contact-and-press/press/press-releases/new-report-metroselskabet-delivered-mega-project-on-time-on-budget-and-with-far-more-passengers-than-expected/" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260519072555/https://www.railway-technology.com/projects/sydhavn-metro-line-line-4-copenhagen/", "kind": "other", "tier": "secondary", "title": "Sydhavn Metro Line (Line 4), Copenhagen — Railway Technology", "url": "https://www.railway-technology.com/projects/sydhavn-metro-line-line-4-copenhagen/" } ] }, "geometryRef": "copenhagen-M4", "id": "copenhagen-m4-2024", "kind": "extension", "label": { "en": "Sydhavn extension: København H → København Syd" }, "notes": "[Date chase 2026-06-12] Construction start (2018) confirmed by primary Metroselskabet sources: site work began August 2018, with the official first-spade ceremony at Enghave Brygge on 8 November 2018.", "opened": "2024-06-22", "segment": { "fromStopIndex": 7, "toStopIndex": 12 }, "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260310153131/https://metroselskabet.dk/en/contact-and-press/press/press-releases/the-m4-metro-line-to-sydhavn-and-valby-opens-on-22-june/", "kind": "primary", "quote": "On Saturday 22 June 2024, Metroselskabet will open the doors to the long-awaited extension of the M4 metro line. ... The M4 extension consists of five new metro stations in Copenhagen: Havneholmen, Enghave Brygge, Sluseholmen, Mozarts Plads and Copenhagen South.", "tier": "primary", "title": "The M4 metro line to Sydhavn and Valby opens on 22 June — Metroselskabet (press release)", "url": "https://metroselskabet.dk/en/contact-and-press/press/press-releases/the-m4-metro-line-to-sydhavn-and-valby-opens-on-22-june/" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251224103419/https://en.wikipedia.org/wiki/M4_(Copenhagen_Metro)", "kind": "wikipedia", "tier": "tertiary", "title": "M4 (Copenhagen Metro) — Wikipedia (Sydhavn extension opened 22 Jun 2024)", "url": "https://en.wikipedia.org/wiki/M4_(Copenhagen_Metro)" } ], "stationCount": 5 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251224103419/https://en.wikipedia.org/wiki/M4_(Copenhagen_Metro)", "kind": "wikipedia", "tier": "tertiary", "title": "M4 (Copenhagen Metro) — Wikipedia", "url": "https://en.wikipedia.org/wiki/M4_(Copenhagen_Metro)" } ] } ], "name": { "da": "København", "en": "Copenhagen" } }, { "bbox": [ -0.65, 51.39, 0.3, 51.72 ], "center": [ -0.118, 51.509 ], "country": "United Kingdom", "defaultZoom": 10, "homeCurrency": "GBP", "id": "london", "lines": [ { "cityId": "london", "color": "#B26300", "displayNumber": "Bakerloo", "id": "london-line-bakerloo", "name": { "en": "Bakerloo line (Kenton ↔ Lambeth North)" }, "phases": [ { "confidence": "low", "constructionStart": "1898", "cost": { "basis": "estimate", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": true, "value": 1615000, "year": 1906 }, "notes": "Estimated construction cost of the original Baker Street & Waterloo Railway (the initial central tube). Roughly £179 million in modern terms per Wikipedia's inflation note. Figure covers the original line, not later extensions. [Citation chase 2026-06-11] This is a contemporary construction estimate reported in The Times (20 April 1899), not an actual outturn cost; the £1,615,000 figure predates the 1906 opening. The underlying primary source could not be independently verified (paywalled, dead Gale link, no archive capture), so the figure rests on the Wikipedia Featured Article alone.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510212145/https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway", "kind": "wikipedia", "quote": "The cost of construction was estimated to be £1,615,000", "tier": "tertiary", "title": "Baker Street and Waterloo Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway" } ] }, "geometryRef": "london-Bakerloo", "id": "london-bakerloo-1906-initial", "kind": "initial", "label": { "en": "Initial opening: Baker Street → Lambeth North (Kennington Road) — Baker Street & Waterloo Railway" }, "notes": "[Date chase 2026-06-12] Construction-start year 1898 corroborated by two independent Wikipedia articles; BS&WR gives 'summer of 1898' and Bakerloo line gives 'June 1898', both citing offline print sources (Lee 1956; Day & Reed 2001). North tunnel boring began February 1899. [Opening-date chase 2026-06-13] The 10 March 1906 'official opening' was also the revenue-service opening day (service from 5:30 am); no separate ceremonial-only date exists.", "opened": "1906-03-10", "segment": { "fromStopIndex": 15, "toStopIndex": 22 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510212145/https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway", "kind": "wikipedia", "quote": "The cost of construction was estimated to be £1,615,000", "tier": "tertiary", "title": "Baker Street and Waterloo Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510212145/https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway", "kind": "wikipedia", "quote": "Construction commenced in the summer of 1898 ... The north tunnel was constructed first, commencing in February 1899.", "tier": "tertiary", "title": "Baker Street and Waterloo Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "the BS&WR's line served nine stations and ran completely underground in a pair of tunnels for 6 kilometres (4 miles) between its northern terminus at Baker Street and its southern terminus at Elephant and Castle", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" } ], "stationCount": 8 }, { "confidence": "low", "geometryRef": "london-Bakerloo", "id": "london-bakerloo-1906-elephant-castle", "kind": "extension", "label": { "en": "Extension: Lambeth North → Elephant & Castle" }, "notes": "Elephant & Castle is the line's southern terminus, just beyond the drawn spine (which ends at Lambeth North); mapped to the Lambeth North index.", "opened": "1906-08-05", "segment": { "fromStopIndex": 22, "toStopIndex": 22 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "with Elephant & Castle opening five months later, on 5 August", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "london-Bakerloo", "id": "london-bakerloo-1907-marylebone", "kind": "extension", "label": { "en": "Extension: Baker Street → Great Central (now Marylebone)" }, "opened": "1907-03-27", "segment": { "fromStopIndex": 14, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "27 March 1907: Great Central station (later Marylebone) opened. 1 new station.", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "london-Bakerloo", "id": "london-bakerloo-1907-edgware-road", "kind": "extension", "label": { "en": "Extension: Marylebone → Edgware Road" }, "opened": "1907-06-15", "segment": { "fromStopIndex": 13, "toStopIndex": 14 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "15 June 1907: Edgware Road station opened. 1 new station.", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "london-Bakerloo", "id": "london-bakerloo-1913-paddington", "kind": "extension", "label": { "en": "Extension: Edgware Road → Paddington" }, "opened": "1913-12-01", "segment": { "fromStopIndex": 12, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510212145/https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway", "kind": "wikipedia", "quote": "The extension opened on 1 December 1913, with the single new station at Paddington.", "tier": "tertiary", "title": "Baker Street and Waterloo Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "london-Bakerloo", "id": "london-bakerloo-1915-queens-park", "kind": "extension", "label": { "en": "Extension: Paddington → Queen's Park (Warwick Avenue, Kilburn Park, Queen's Park)" }, "notes": "Warwick Avenue and Kilburn Park opened 31 January 1915; Queen's Park opened 11 February 1915 (next phase). Maida Vale, an infill on this section, opened 6 June 1915 (separate phase). [Opening-date chase 2026-06-13] This phase covers only Warwick Avenue and Kilburn Park (opened 31 Jan 1915); the Queen's Park terminus itself opened later, on 11 Feb 1915 (next phase).", "opened": "1915-01-31", "segment": { "fromStopIndex": 8, "toStopIndex": 12 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "31 January 1915: Kilburn Park and Warwick Avenue stations opened. 2 new stations.", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" } ], "stationCount": 2 }, { "confidence": "low", "geometryRef": "london-Bakerloo", "id": "london-bakerloo-1915-queens-park-terminus", "kind": "extension", "label": { "en": "Extension opens at terminus: Queen's Park" }, "opened": "1915-02-11", "segment": { "fromStopIndex": 8, "toStopIndex": 8 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "11 February 1915: Queen's Park station opened. 1 new station.", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "london-Bakerloo", "id": "london-bakerloo-1915-willesden-junction", "kind": "extension", "label": { "en": "Extension: Queen's Park → Willesden Junction (joint running onto LNWR Watford DC line)" }, "notes": "Bakerloo services extended over new LNWR tracks to Willesden Junction; the LNWR had built the Willesden–Watford line and intermediate stations 1912–1913.", "opened": "1915-05-10", "segment": { "fromStopIndex": 6, "toStopIndex": 8 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510212145/https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway", "kind": "wikipedia", "quote": "On 10 May 1915, when Bakerloo Tube services were extended ... to Willesden Junction", "tier": "tertiary", "title": "Baker Street and Waterloo Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "london-Bakerloo", "id": "london-bakerloo-1915-maida-vale", "kind": "extension", "label": { "en": "Infill station opens: Maida Vale" }, "opened": "1915-06-06", "segment": { "fromStopIndex": 10, "toStopIndex": 10 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "6 June 1915: Maida Vale station opened. 1 new station.", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "london-Bakerloo", "id": "london-bakerloo-1916-kensal-green", "kind": "extension", "label": { "en": "Infill station opens: Kensal Green" }, "opened": "1916-10-01", "segment": { "fromStopIndex": 7, "toStopIndex": 7 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "1 October 1916: Kensal Green station opened. 1 new station.", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "london-Bakerloo", "id": "london-bakerloo-1917-watford-junction", "kind": "extension", "label": { "en": "Extension: Willesden Junction → Watford Junction (over LNWR/Watford DC line)" }, "notes": "Bakerloo tube service extended over LNWR DC tracks to Watford Junction (Harlesden, Stonebridge Park, North Wembley, Wembley Central, Kenton, Harrow & Wealdstone and beyond). Stations beyond Harrow & Wealdstone toward Watford are not on the drawn spine; mapped to the on-spine Willesden Junction→Kenton portion.", "opened": "1917-04-16", "segment": { "fromStopIndex": 0, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510212145/https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway", "kind": "wikipedia", "quote": "On 16 April 1917, the tube service was extended to Watford Junction.", "tier": "tertiary", "title": "Baker Street and Waterloo Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "Between 1917 and 1982, Bakerloo line trains continued along the DC line past Harrow & Wealdstone to Watford Junction.", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" } ], "stationCount": 8 }, { "confidence": "low", "geometryRef": null, "id": "london-bakerloo-1939-stanmore-takeover", "kind": "extension", "label": { "en": "Stanmore branch takeover from Metropolitan line: new Baker Street → Finchley Road tube tunnels (St John's Wood, Swiss Cottage) onward to Stanmore" }, "notes": "On the Baker Street–Finchley Road–Stanmore branch (transferred to the Jubilee line in 1979), not on the drawn Bakerloo spine. Replaced three Metropolitan stations (Lord's, Marlborough Road, Swiss Cottage) with two new Bakerloo stations (St John's Wood, Swiss Cottage).", "opened": "1939-11-20", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "The Bakerloo line took over the Metropolitan line's service to Stanmore on 20 November 1939.", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "the replacement of three Metropolitan line stations (Lord's, Marlborough Road and Swiss Cottage) between those points with two new Bakerloo line stations (St John's Wood and Swiss Cottage)", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" } ], "stationCount": 2 }, { "closed": "1979-05-01", "confidence": "low", "geometryRef": null, "id": "london-bakerloo-1979-stanmore-transfer", "kind": "renumber", "label": { "en": "Stanmore branch (Baker Street → Stanmore) transferred from Bakerloo to the new Jubilee line" }, "notes": "Not a closure: the Stanmore branch and the St John's Wood/Swiss Cottage tube section were reassigned from the Bakerloo to the newly created Jubilee line on 1 May 1979. Off the drawn Bakerloo spine.", "opened": "1979-05-01", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "The branch remained part of the Bakerloo line until 1 May 1979, when similar congestion problems for the Bakerloo line caused by two branches converging at Baker Street led to the creation of the Jubilee line.", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" } ] }, { "closed": "1982", "confidence": "low", "geometryRef": null, "id": "london-bakerloo-1982-stonebridge-cutback", "kind": "renumber", "label": { "en": "Northern service cut back: Watford Junction → Stonebridge Park (Bakerloo withdrawn beyond Stonebridge Park)" }, "notes": "Service reduction, not a line closure: Bakerloo trains were cut back to Stonebridge Park in 1982. The withdrawn section beyond is off the drawn spine. [Opening-date chase 2026-06-13] Cutback beyond Stonebridge Park took effect 24 September 1982 (service withdrawn at Harrow & Wealdstone and stations beyond), part of the fallout from cancellation of the GLC Fares Fair subsidy.", "opened": "1982", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "Bakerloo services to Watford Junction were reduced in the 1960s and cut back in 1982 to Stonebridge Park.", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" } ] }, { "confidence": "low", "geometryRef": null, "id": "london-bakerloo-1984-harrow-restored", "kind": "reopening", "label": { "en": "Northern service restored: Stonebridge Park → Harrow & Wealdstone (present all-day service)" }, "notes": "Service to Harrow & Wealdstone gradually restored from 1984; present all-day service from 1989. Harrow & Wealdstone lies beyond Kenton, off the drawn spine. Service restoration over existing shared DC-line track, not new construction. [Opening-date chase 2026-06-13] Service to Harrow & Wealdstone was restored 4 June 1984, but as a peak-hours-only service; the present all-day service was not instituted until 1989, so the phase label's 'present all-day service' wording is slightly imprecise for the 1984 date.", "opened": "1984", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "quote": "Services as far as Harrow & Wealdstone were gradually restored from 1984, and in 1989 the present all-day service was instituted.", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260326202536/https://en.wikipedia.org/wiki/Bakerloo_line", "kind": "wikipedia", "tier": "tertiary", "title": "Bakerloo line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bakerloo_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510212145/https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway", "kind": "wikipedia", "tier": "tertiary", "title": "Baker Street and Waterloo Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Baker_Street_and_Waterloo_Railway" } ] }, { "cityId": "london", "color": "#DC241F", "displayNumber": "Central", "id": "london-line-central", "name": { "en": "Central line (Ruislip Gardens ↔ Theydon Bois)" }, "phases": [ { "confidence": "low", "constructionStart": "1896", "cost": { "basis": "budget", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": false, "value": 2544000, "year": 1900 }, "notes": "Construction contract figure for the original Shepherd's Bush–Bank line; the Electric Traction Company Ltd (ETCL) contract was £2,544,000 plus £700,000 in 4% debenture stock. Figure covers the original tube line only. [Citation chase 2026-06-11] The £2,544,000 is the ETCL construction contract price agreed 22 March 1894 (not the 1900 opening-year outturn); the value rests on a single Wikipedia statement sourced to one offline specialist book (Bruce & Croome, The Central Line, 2006, p.5) that could not be independently verified.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260413105648/https://en.wikipedia.org/wiki/Central_London_Railway", "kind": "wikipedia", "quote": "£2,544,000 (approximately £286 million today) plus £700,000 in 4 per cent debenture stock", "tier": "secondary", "title": "Central London Railway — Wikipedia (cost)", "url": "https://en.wikipedia.org/wiki/Central_London_Railway" } ] }, "geometryRef": "london-Central", "id": "london-central-1900-twopenny-tube", "kind": "initial", "label": { "en": "Central London Railway opens: Shepherd's Bush → Bank (the 'Twopenny Tube')" }, "notes": "[Date chase 2026-06-12] Construction-start year 1896 corroborated by Central London Railway article (Badsey-Ellis 2005, p.6): demolition April 1896, shafts Aug-Sep 1896. [Opening-date chase 2026-06-13] Ceremonial opening by the Prince of Wales was 27 June 1900 (one day before the 1899 Act time limit); public/revenue service began 30 July 1900 — the curated date. The work-unit's '30 June' in the source quote appears to be a transcription error.", "opened": "1900-07-30", "segment": { "fromStopIndex": 9, "toStopIndex": 21 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260413105648/https://en.wikipedia.org/wiki/Central_London_Railway", "kind": "wikipedia", "quote": "The line between Shepherd's Bush and Bank was formally opened on 30 June 1900, public services beginning on 30 July.", "tier": "secondary", "title": "Central London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_London_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260413105648/https://en.wikipedia.org/wiki/Central_London_Railway", "kind": "wikipedia", "quote": "£2,544,000 (approximately £286 million today) plus £700,000 in 4 per cent debenture stock", "tier": "secondary", "title": "Central London Railway — Wikipedia (cost)", "url": "https://en.wikipedia.org/wiki/Central_London_Railway" } ], "stationCount": 13 }, { "confidence": "low", "constructionStart": "1907", "geometryRef": null, "id": "london-central-1908-wood-lane", "kind": "extension", "label": { "en": "Wood Lane loop opens (single-platform exhibition loop west of Shepherd's Bush, for the 1908 Franco-British Exhibition)" }, "notes": "The exhibition loop / Wood Lane (Central) terminus west of Shepherd's Bush is not on the drawn spine. [Date chase 2026-06-12] Wood Lane construction-start year 1907 corroborated by Central London Railway article (Badsey-Ellis 2005, p.20): exhibition-site work began January 1907.", "opened": "1908-05-14", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260413105648/https://en.wikipedia.org/wiki/Central_London_Railway", "kind": "wikipedia", "quote": "The line was extended westwards with a loop serving a single platform at Wood Lane for the 1908 Franco-British Exhibition.", "tier": "secondary", "title": "Central London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_London_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122355/https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "kind": "wikipedia", "quote": "Wood Lane (1 station)... Opening: 14 May 1908", "tier": "secondary", "title": "Central line (London Underground) — Wikipedia (Wood Lane date)", "url": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)" } ], "stationCount": 1 }, { "confidence": "low", "constructionStart": "1910", "geometryRef": "london-Central", "id": "london-central-1912-liverpool-street", "kind": "extension", "label": { "en": "Eastern extension opens: Bank → Liverpool Street (first London Underground station built with escalators)" }, "notes": "[Date chase 2026-06-12] Liverpool Street construction-start year 1910 corroborated by Central London Railway article (Badsey-Ellis 2005, p.22): construction started July 1910.", "opened": "1912-07-28", "segment": { "fromStopIndex": 21, "toStopIndex": 22 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260413105648/https://en.wikipedia.org/wiki/Central_London_Railway", "kind": "wikipedia", "quote": "Opening: 28 July 1912... Route Segment: Bank to Liverpool Street... Construction started in July 1910", "tier": "secondary", "title": "Central London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_London_Railway" } ], "stationCount": 1 }, { "confidence": "low", "constructionStart": "1912", "geometryRef": "london-Central", "id": "london-central-1920-ealing-broadway", "kind": "extension", "label": { "en": "Western extension opens: Wood Lane → Ealing Broadway (over the GWR/E&SBR line; East Acton new tube station)" }, "notes": "Mapped to the Ealing Broadway branch sub-spine at East Acton (index 2), the new tube station opened by this phase; the Ealing Broadway terminus itself lies just beyond the branch's drawn end. [Date chase 2026-06-12] Ealing Broadway construction-start year 1912 explicitly supported by Central line (London Underground) article, citing Croome & Jackson 1993, p.119. The detailed CLR article is silent on the 1912 start but does not contradict it (E&SBR freight line opened 1917; CLR electric services began 3 Aug 1920). [Opening-date chase 2026-06-13] Opening was postponed until after WWI; East Acton opened as a single intermediate station the same day.", "opened": "1920-08-03", "segment": { "fromStopIndex": 6, "toStopIndex": 9 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260413105648/https://en.wikipedia.org/wiki/Central_London_Railway", "kind": "wikipedia", "quote": "Opening: 3 August 1920... New station: East Acton (1 station)", "tier": "secondary", "title": "Central London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_London_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122355/https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "kind": "wikipedia", "quote": "The rolling stock returned when the extension opened in 1920.", "tier": "secondary", "title": "Central line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "london-Central#2", "id": "london-central-1923-acton-infill", "kind": "extension", "label": { "en": "Infill stations open on the Ealing extension: North Acton & West Acton" }, "notes": "Mapped to the Ealing Broadway branch sub-spine: West Acton (index 0) and North Acton (index 1).", "opened": "1923-11-05", "segment": { "fromStopIndex": 0, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260413105648/https://en.wikipedia.org/wiki/Central_London_Railway", "kind": "wikipedia", "quote": "Opening: 5 November 1923... New Stations: North Acton and West Acton (2 stations on Ealing extension)", "tier": "secondary", "title": "Central London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_London_Railway" } ], "stationCount": 2 }, { "confidence": "low", "constructionStart": "1936", "geometryRef": "london-Central", "id": "london-central-1946-stratford", "kind": "extension", "label": { "en": "New Works Programme eastern extension opens: Liverpool Street → Stratford (new tube tunnels)" }, "notes": "A placeholder cost was dropped on review (no real per-line build cost was sourced for the New Works Programme segments). [Date chase 2026-06-12] 1936 construction-start unverifiable from Wikipedia: the programme is dated '1935-40' and eastern-extension tunnels were largely built by 1940 (consistent with a mid-1930s start), but no accessible source pins the specific year. The dedicated 1935-40 New Works Programme article is currently 404. Year not contradicted.", "opened": "1946-12-04", "segment": { "fromStopIndex": 22, "toStopIndex": 25 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122355/https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "kind": "wikipedia", "quote": "The eastern extension opened as far as Stratford in December 1946, with trains continuing without passengers to reverse in the cutting south of Leyton.", "tier": "secondary", "title": "Central line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260411131433/https://en.wikipedia.org/wiki/Stratford_station", "kind": "wikipedia", "quote": "London Underground Central line services started on 4 December 1946, extended from Liverpool Street station in new tunnels after being delayed due to the Second World War.", "tier": "secondary", "title": "Stratford station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Stratford_station" } ], "stationCount": 4 }, { "confidence": "medium", "geometryRef": "london-Central", "id": "london-central-1947-leytonstone", "kind": "extension", "label": { "en": "Eastern extension opens: Stratford → Leytonstone (Leyton, Leytonstone; over former LNER/GER line)" }, "opened": "1947-05-05", "segment": { "fromStopIndex": 25, "toStopIndex": 27 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122355/https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "kind": "wikipedia", "quote": "In 1947, the line opened to Leytonstone, and then Woodford and Newbury Park.", "tier": "secondary", "title": "Central line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20241005083256/https://tubehistory.uk/central-line.php", "kind": "other", "quote": "Leyton and Leytonstone were first served on May 5, 1947.", "tier": "tertiary", "title": "Central line — Tube History", "url": "https://www.tubehistory.uk/central-line.php" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260611122854/https://en.wikipedia.org/wiki/Hainault_Loop", "kind": "other", "publisher": "Wikipedia", "quote": "Leytonstone, opened 22 August 1856 by the ECR, closed briefly, re-opening 5 May 1947.", "tier": "secondary", "title": "Hainault Loop — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hainault_Loop", "via": "https://en.wikipedia.org/wiki/Hainault_Loop" } ], "stationCount": 2 }, { "confidence": "low", "constructionStart": "1936", "geometryRef": "london-Central", "id": "london-central-1947-greenford", "kind": "extension", "label": { "en": "New Works Programme western extension opens: North Acton → Greenford (over the GWR Acton–Northolt line; Hanger Lane, Perivale, Greenford)" }, "notes": "[Date chase 2026-06-12] 1936 construction-start unverifiable from Wikipedia: western extension was part of the '1935-40' programme and opened to Greenford 30 June 1947 after WWII delay, but no accessible source states the specific construction-start year. The dedicated 1935-40 New Works Programme article is currently 404. Year not contradicted.", "opened": "1947-06-30", "segment": { "fromStopIndex": 3, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122355/https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "kind": "wikipedia", "quote": "the western extension opened as far as Greenford in 1947", "tier": "secondary", "title": "Central line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260212041025/https://en.wikipedia.org/wiki/Greenford_station", "kind": "wikipedia", "quote": "the first section of the western extension opened from North Acton to Greenford on 30 June 1947", "tier": "secondary", "title": "Greenford station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Greenford_station" } ], "stationCount": 3 }, { "confidence": "medium", "geometryRef": "london-Central#2", "id": "london-central-1947-newbury-park-woodford", "kind": "extension", "label": { "en": "Eastern extension opens: Leytonstone → Newbury Park (Wanstead, Redbridge, Gants Hill, Newbury Park) and Leytonstone → Woodford (Snaresbrook, South Woodford, Woodford)" }, "notes": "The Leytonstone→Woodford section (Snaresbrook, South Woodford, Woodford) is on the spine and mapped here; the Leytonstone→Newbury Park stations (Wanstead, Redbridge, Gants Hill, Newbury Park) are on the off-spine Hainault loop and not drawn.", "opened": "1947-12-14", "segment": { "fromStopIndex": 22, "toStopIndex": 26 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611122854/https://en.wikipedia.org/wiki/Hainault_Loop", "kind": "wikipedia", "quote": "Leytonstone to Newbury Park (new tube tunnels): opened by LTE 14 December 1947 - Three intermediate stations (Gants Hill, Redbridge, Wanstead)", "tier": "secondary", "title": "Hainault Loop — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hainault_Loop" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260204232354/https://en.wikipedia.org/wiki/Woodford_tube_station", "kind": "wikipedia", "quote": "transfer to the London Passenger Transport Board (LPTB) on 14 December 1947 as part of the extension of the Central Line", "tier": "secondary", "title": "Woodford tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Woodford_tube_station" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613161818/https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "kind": "other", "publisher": "Wikipedia", "quote": "[Station table records {{dts|format=dmy|1947|12|14}} for 7 stations: Snaresbrook, South Woodford, Woodford, Wanstead, Redbridge, Gants Hill, Newbury Park]", "tier": "secondary", "title": "Central line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "via": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)" } ], "stationCount": 7 }, { "confidence": "medium", "geometryRef": "london-Central#2", "id": "london-central-1948-hainault-south", "kind": "extension", "label": { "en": "Hainault loop opens (south): Newbury Park → Hainault (Barkingside, Fairlop, Hainault; former LNER line, electrified)" }, "notes": "Mapped to the Ealing-to-Hainault branch sub-spine: Newbury Park (index 26), Barkingside (27), Fairlop (28); Hainault itself is the branch terminus just beyond the drawn end.", "opened": "1948-05-31", "segment": { "fromStopIndex": 26, "toStopIndex": 28 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611122854/https://en.wikipedia.org/wiki/Hainault_Loop", "kind": "wikipedia", "quote": "Hainault: 're-opening 31 May 1948'... Fairlop: 're-opening 31 May 1948'... Barkingside: 're-opening 31 May 1948'", "tier": "secondary", "title": "Hainault Loop — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hainault_Loop" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613161818/https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "kind": "other", "publisher": "Wikipedia", "quote": "[Station table records {{dts|format=dmy|1948|5|31}} for Barkingside, Fairlop, and Hainault]", "tier": "secondary", "title": "Central line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "via": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)" } ], "stationCount": 3 }, { "confidence": "medium", "geometryRef": "london-Central#3", "id": "london-central-1948-loughton", "kind": "extension", "label": { "en": "Hainault loop opens (north) and Woodford → Loughton: Hainault → Woodford (Grange Hill, Chigwell, Roding Valley) plus Buckhurst Hill, Loughton (former LNER line, electrified)" }, "notes": "The Woodford→Loughton stations (Buckhurst Hill, Loughton) are on the spine and mapped here; the northern Hainault loop stations (Grange Hill, Chigwell, Roding Valley) are off-spine.", "opened": "1948-11-21", "segment": { "fromStopIndex": 0, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611122854/https://en.wikipedia.org/wiki/Hainault_Loop", "kind": "wikipedia", "quote": "Grange Hill: 're-opening 21 November 1948'... Chigwell: 're-opening 21 November 1948'... Roding Valley: 're-opening 21 November 1948'", "tier": "secondary", "title": "Hainault Loop — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hainault_Loop" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20250816142934/https://railtransportinlondon.fandom.com/wiki/London_Underground_Central_Line", "kind": "other", "quote": "Electric services commenced as far as Loughton (and around the 'loop' to Hainault) on 21 November 1948.", "tier": "tertiary", "title": "London Underground Central Line — RailTransportinLondon Wiki", "url": "https://railtransportinlondon.fandom.com/wiki/London_Underground_Central_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613161818/https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "kind": "other", "publisher": "Wikipedia", "quote": "[Station table records {{dts|format=dmy|1948|11|21}} for Roding Valley, Chigwell, Grange Hill, Hainault (north side) and Buckhurst Hill, Loughton]", "tier": "secondary", "title": "Central line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "via": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)" } ], "stationCount": 5 }, { "confidence": "low", "geometryRef": "london-Central", "id": "london-central-1948-west-ruislip", "kind": "extension", "label": { "en": "Western extension completed: Greenford → West Ruislip (Northolt, South Ruislip, Ruislip Gardens, West Ruislip; over the GWR Acton–Northolt line)" }, "notes": "West Ruislip is the spine's western terminus (index 0); Ruislip Gardens, South Ruislip and Northolt are indices 0–2 here, with Greenford at index 3.", "opened": "1948-11-21", "segment": { "fromStopIndex": 0, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260215054034/https://en.wikipedia.org/wiki/West_Ruislip_station", "kind": "wikipedia", "quote": "Central line services began running from West Ruislip on 21 November 1948.", "tier": "secondary", "title": "West Ruislip station — Wikipedia", "url": "https://en.wikipedia.org/wiki/West_Ruislip_station" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122355/https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "kind": "wikipedia", "quote": "and West Ruislip in 1948.", "tier": "secondary", "title": "Central line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)" } ], "stationCount": 4 }, { "confidence": "low", "geometryRef": "london-Central", "id": "london-central-1949-epping", "kind": "extension", "label": { "en": "Eastern extension completed: Loughton → Epping (Debden, Theydon Bois, Epping; former LNER line, electrified)" }, "notes": "Debden (33) and Theydon Bois (34) are on the spine; Epping (the terminus) lies just beyond the drawn spine. [Opening-date chase 2026-06-13] This phase reflects Central line taking over GER/BR steam-worked services to Epping (and onward to Ongar, then still steam-worked); the Epping–Ongar branch was not electrified until 1957.", "opened": "1949-09-25", "segment": { "fromStopIndex": 27, "toStopIndex": 34 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122355/https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "kind": "wikipedia", "quote": "The extension transferred to London Underground management in 1949, when Epping began to be served by Central line trains.", "tier": "secondary", "title": "Central line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260130183315/https://en.wikipedia.org/wiki/Epping_tube_station", "kind": "wikipedia", "quote": "Debden, Theydon Bois, and Epping first served September 25, 1949", "tier": "secondary", "title": "Epping tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Epping_tube_station" } ], "stationCount": 3 }, { "confidence": "medium", "geometryRef": null, "id": "london-central-1957-ongar", "kind": "extension", "label": { "en": "Epping → Ongar branch electrified, replacing steam shuttle (North Weald, Blake Hall, Ongar)" }, "notes": "The Epping→Ongar branch is beyond Epping, off the drawn spine (and now closed).", "opened": "1957-11-18", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122355/https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "kind": "wikipedia", "quote": "The single-track section from Epping to Ongar was electrified in 1957 and then operated as a shuttle service using short tube trains.", "tier": "secondary", "title": "Central line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260531165156/https://en.wikipedia.org/wiki/Epping_Ongar_Railway", "kind": "wikipedia", "quote": "The line was electrified on 18 November 1957, when electric trains took over from steam.", "tier": "secondary", "title": "Epping Ongar Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Epping_Ongar_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260507191339/https://en.wikipedia.org/wiki/Ongar_railway_station", "kind": "other", "publisher": "Wikipedia", "quote": "The service was operated by British Railways for the Underground until 18 November 1957, when the line was electrified and electric trains took over from steam.", "tier": "secondary", "title": "Ongar railway station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Ongar_railway_station", "via": "https://en.wikipedia.org/wiki/Ongar_railway_station" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260515170657/https://en.wikipedia.org/wiki/North_Weald_railway_station", "kind": "other", "publisher": "Wikipedia", "quote": "Key dates: 18 November 1957 — Line electrified. Steam locomotives operated services from 1949 to 1957, after which the track was electrified and taken over by the Central line.", "tier": "secondary", "title": "North Weald railway station — Wikipedia", "url": "https://en.wikipedia.org/wiki/North_Weald_railway_station", "via": "https://en.wikipedia.org/wiki/North_Weald_railway_station" } ], "stationCount": 3 }, { "closed": "1994-09-30", "confidence": "low", "geometryRef": null, "id": "london-central-1994-ongar-closes", "kind": "reopening", "label": { "en": "Epping → Ongar branch closes (loss-making shuttle; now the heritage Epping Ongar Railway)" }, "notes": "The Epping→Ongar branch (off the drawn spine) closed in 1994 and is now the heritage Epping Ongar Railway. [Opening-date chase 2026-06-13] Branch closed 30 September 1994 (losing money, ~100 passengers/day); now the heritage Epping Ongar Railway.", "opened": "1957-11-18", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122355/https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "kind": "wikipedia", "quote": "However, carrying only 100 passengers a day and losing money, the section closed in 1994, and is now used by the heritage Epping Ongar Railway.", "tier": "secondary", "title": "Central line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260531165156/https://en.wikipedia.org/wiki/Epping_Ongar_Railway", "kind": "wikipedia", "quote": "On 30 September 1994, the line was closed.", "tier": "secondary", "title": "Epping Ongar Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Epping_Ongar_Railway" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122355/https://en.wikipedia.org/wiki/Central_line_(London_Underground)", "kind": "wikipedia", "tier": "secondary", "title": "Central line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_line_(London_Underground)" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260413105648/https://en.wikipedia.org/wiki/Central_London_Railway", "kind": "wikipedia", "tier": "secondary", "title": "Central London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Central_London_Railway" } ] }, { "cityId": "london", "color": "#FFD300", "displayNumber": "Circle", "id": "london-line-circle", "name": { "en": "Circle line (Goldhawk Road ↔ Paddington spiral)" }, "phases": [ { "confidence": "medium", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": false, "value": 1300000, "year": 1862 }, "notes": "Cost of the original 3.75-mile Metropolitan Railway (Paddington–Farringdon), not the whole later Circle; work completed end of 1862.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "wikipedia", "quote": "The 3.75-mile (6 km) railway opened to the public on 10 January 1863 ... By the end of 1862, work was complete at a cost of £1.3 million.", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, "geometryRef": "london-Circle", "id": "london-circle-1863-paddington-farringdon", "kind": "initial", "label": { "en": "Metropolitan Railway opens: Paddington (Bishop's Road) → Farringdon Street (world's first underground railway; western/northern arc of the future Inner Circle)" }, "opened": "1863-01-10", "segment": { "fromStopIndex": 7, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "wikipedia", "quote": "The 3.75-mile (6 km) railway opened to the public on 10 January 1863 ... By the end of 1862, work was complete at a cost of £1.3 million.", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123126/https://en.wikipedia.org/wiki/Inner_Circle_(London_Underground)", "kind": "wikipedia", "quote": "In 1863, the Metropolitan Railway, the world's first underground railway, opened in London between Paddington and Farringdon", "tier": "tertiary", "title": "Inner Circle (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Inner_Circle_(London_Underground)" } ] }, { "confidence": "medium", "geometryRef": "london-Circle", "id": "london-circle-1865-moorgate", "kind": "extension", "label": { "en": "Metropolitan Railway extension: Farringdon Street → Moorgate Street (via Aldersgate Street)" }, "opened": "1865-12-23", "segment": { "fromStopIndex": 13, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "wikipedia", "quote": "The extension to Aldersgate Street and Moorgate Street (now Barbican and Moorgate) had opened on 23 December 1865", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510005356/https://www.davros.org/rail/culg/circle.html", "kind": "other", "quote": "Moorgate to Farringdon opened ... 1865-12-23", "tier": "secondary", "title": "CULG — Circle Line", "url": "https://www.davros.org/rail/culg/circle.html" } ] }, { "confidence": "medium", "geometryRef": "london-Circle", "id": "london-circle-1868-high-street-kensington", "kind": "extension", "label": { "en": "Metropolitan District Railway opens western/southern arc: South Kensington / Gloucester Road → High Street Kensington (and Praed Street Junction connection to the Met)" }, "notes": "Opening was contested in research; settled by tiebreaker.", "opened": "1868-10-01", "segment": { "fromStopIndex": 29, "toStopIndex": 31 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510005356/https://www.davros.org/rail/culg/circle.html", "kind": "other", "quote": "[Praed Street Junction] to Gloucester Road via High Street Kensington opened ... 1868-10-01", "tier": "secondary", "title": "CULG — Circle Line", "url": "https://www.davros.org/rail/culg/circle.html" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "The first section of the Met extension opened to Brompton (Gloucester Road) (now Gloucester Road) on 1 October 1868, with stations at Paddington (Praed Street), Bayswater, Notting Hill Gate, and Kensington (High Street) (now High Street Kensington).", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway", "via": "https://en.wikipedia.org/wiki/Circle_line_(London_Underground)" } ] }, { "confidence": "medium", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": false, "value": 3000000, "year": 1868 }, "notes": "Cost of the first District section (South Kensington–Westminster) only — described as almost three times the cost of the Met's original, longer line; not the whole Inner Circle. [Citation chase 2026-06-11] The £3M is a round, retrospective figure from secondary railway histories (Wolmar 2004 p.72; Horne 2006 pp.7–8); both underlying book citations are offline/print and could not be independently verified, and no primary/contemporary source was found.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "On 24 December 1868, the District opened its line from South Kensington to Westminster ... the cost of the first section of the District from South Kensington to Westminster was £3 million, almost three times the cost of the Met's original, longer line", "tier": "tertiary", "title": "Metropolitan District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ] }, "geometryRef": "london-Circle", "id": "london-circle-1868-westminster", "kind": "extension", "label": { "en": "Metropolitan District Railway opens: South Kensington → Westminster (first District section of the Inner Circle)" }, "opened": "1868-12-24", "segment": { "fromStopIndex": 25, "toStopIndex": 29 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "On 24 December 1868, the District opened its line from South Kensington to Westminster ... the cost of the first section of the District from South Kensington to Westminster was £3 million, almost three times the cost of the Met's original, longer line", "tier": "tertiary", "title": "Metropolitan District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260524173617/https://en.wikipedia.org/wiki/District_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "On 24 December 1868, the District opened its line from South Kensington to Westminster, with stations at South Kensington, Sloane Square, Victoria, St James's Park and Westminster Bridge (now Westminster), the Met extending eastwards from Brompton to a shared station at South Kensington on the same day.", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/District_Railway", "via": "https://en.wikipedia.org/wiki/Circle_line_(London_Underground)" } ] }, { "confidence": "medium", "geometryRef": "london-Circle", "id": "london-circle-1870-blackfriars", "kind": "extension", "label": { "en": "Metropolitan District Railway extension: Westminster → Blackfriars" }, "opened": "1870-05-30", "segment": { "fromStopIndex": 22, "toStopIndex": 25 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "The line was opened from Westminster to Blackfriars on 30 May 1870", "tier": "tertiary", "title": "Metropolitan District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510005356/https://www.davros.org/rail/culg/circle.html", "kind": "other", "quote": "Westminster to Blackfriars opened ... 1870-05-30", "tier": "secondary", "title": "CULG — Circle Line", "url": "https://www.davros.org/rail/culg/circle.html" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260524173617/https://en.wikipedia.org/wiki/District_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "The line was opened from Westminster to Blackfriars on 30 May 1870 with stations at Charing Cross (now Embankment), The Temple (now Temple) and Blackfriars.", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/District_Railway", "via": "https://en.wikipedia.org/wiki/Circle_line_(London_Underground)" } ] }, { "confidence": "medium", "geometryRef": "london-Circle", "id": "london-circle-1871-mansion-house", "kind": "extension", "label": { "en": "Metropolitan District Railway extension: Blackfriars → Mansion House (southern arc reaches the City)" }, "notes": "[Opening-date chase 2026-06-13] Ceremonial vs revenue: opening banquet (attended by PM Gladstone, a shareholder) was Saturday 1 July 1871; Mansion House opened to public the following Monday, 3 July 1871. Curated revenue date is correct.", "opened": "1871-07-03", "segment": { "fromStopIndex": 21, "toStopIndex": 22 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Mansion House opened on Monday, 3 July 1871, following an opening banquet on Saturday, 1 July 1871", "tier": "tertiary", "title": "Metropolitan District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510005356/https://www.davros.org/rail/culg/circle.html", "kind": "other", "quote": "Blackfriars to Mansion House opened ... 1871-07-03", "tier": "secondary", "title": "CULG — Circle Line", "url": "https://www.davros.org/rail/culg/circle.html" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260524173617/https://en.wikipedia.org/wiki/District_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "On Saturday 1 July 1871, an opening banquet was attended by prime minister William Gladstone, who was also a shareholder. The following Monday, Mansion House opened and the District began running its own trains.", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/District_Railway", "via": "https://en.wikipedia.org/wiki/Circle_line_(London_Underground)" } ] }, { "confidence": "medium", "geometryRef": "london-Circle", "id": "london-circle-1882-tower-hill", "kind": "extension", "label": { "en": "Metropolitan Railway eastern extension: Aldgate → Tower Hill (temporary station; District also extending to meet it)" }, "notes": "[Opening-date chase 2026-06-13] Tower Hill was a temporary station at this stage, replaced by the joint station in 1884.", "opened": "1882-09-25", "segment": { "fromStopIndex": 17, "toStopIndex": 18 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510005356/https://www.davros.org/rail/culg/circle.html", "kind": "other", "quote": "Tower Hill (1) to Aldgate opened ... 1882-09-25", "tier": "secondary", "title": "CULG — Circle Line", "url": "https://www.davros.org/rail/culg/circle.html" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123126/https://en.wikipedia.org/wiki/Inner_Circle_(London_Underground)", "kind": "wikipedia", "quote": "In 1882, the Metropolitan extended its line from Aldgate to a temporary station at Tower Hill and the District completed its line to Whitechapel.", "tier": "tertiary", "title": "Inner Circle (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Inner_Circle_(London_Underground)" } ] }, { "confidence": "medium", "geometryRef": "london-Circle", "id": "london-circle-1884-loop-complete", "kind": "extension", "label": { "en": "Inner Circle completed: Mansion House → Tower Hill joint station opens, closing the loop and starting the continuous circular service" }, "notes": "[Opening-date chase 2026-06-13] Ceremonial vs revenue: official opening ceremony 17 September 1884 plus trial running preceded the public circular service start on Monday 6 October 1884. Curated revenue date is correct.", "opened": "1884-10-06", "segment": { "fromStopIndex": 18, "toStopIndex": 21 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123126/https://en.wikipedia.org/wiki/Inner_Circle_(London_Underground)", "kind": "wikipedia", "quote": "On 6 October 1884, the temporary station was replaced with a joint station and the inner circle was complete.", "tier": "tertiary", "title": "Inner Circle (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Inner_Circle_(London_Underground)" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510005356/https://www.davros.org/rail/culg/circle.html", "kind": "other", "quote": "Mansion House to Tower Hill (1) opened ... 1884-10-06 ... circular service started", "tier": "secondary", "title": "CULG — Circle Line", "url": "https://www.davros.org/rail/culg/circle.html" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260524173617/https://en.wikipedia.org/wiki/District_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "After an official opening ceremony on 17 September and trial running, a circular service started on Monday 6 October 1884.", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/District_Railway", "via": "https://en.wikipedia.org/wiki/Circle_line_(London_Underground)" } ] }, { "confidence": "medium", "geometryRef": "london-Circle", "id": "london-circle-1949-own-identity", "kind": "renumber", "label": { "en": "Circle line given its own identity: shown separately (in yellow) on the Tube map for the first time" }, "notes": "Map/identity designation rather than new track; covers the whole then-existing loop. [Opening-date chase 2026-06-13] Sources differ by one year: Wikipedia body text says the Circle line was shown separately on the map in 1949, while the infobox footnote (Ovenden 2013, p.220) dates the first separate map appearance to 1948. This phase marks a cartographic identity change, not a line opening.", "opened": "1949", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611122857/https://en.wikipedia.org/wiki/Circle_line_(London_Underground)", "kind": "wikipedia", "quote": "in 1949 the Circle line was shown separately on the map", "tier": "tertiary", "title": "Circle line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Circle_line_(London_Underground)" } ] }, { "confidence": "high", "geometryRef": "london-Circle", "id": "london-circle-2009-spiral", "kind": "extension", "label": { "en": "Circle line reconfigured from closed loop to spiral: extended from Edgware Road west to Hammersmith over the Hammersmith & City route" }, "notes": "The spiral added the Edgware Road→Hammersmith arc (Goldhawk Road=0 … Edgware Road=8 on the spine). [Opening-date chase 2026-06-13] Londonist source (already cited) returned HTTP 403 on both live and archived URLs; its title 'Circle Line Extension Set For December 13th' still corroborates the date. Not added as a newly accepted source due to access issue.", "opened": "2009-12-13", "segment": { "fromStopIndex": 0, "toStopIndex": 8 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611122857/https://en.wikipedia.org/wiki/Circle_line_(London_Underground)", "kind": "wikipedia", "quote": "Prior to 13 December 2009, Circle line trains travelled in both directions around a simple loop ... the closed loop ... was broken at Edgware Road and extended west to become a spiral to Hammersmith.", "tier": "tertiary", "title": "Circle line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Circle_line_(London_Underground)" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20250819175657/https://londonist.com/2009/11/circle_line_uncircling_set_for_dece", "kind": "news", "quote": "Circle Line Extension Set For December 13th", "tier": "secondary", "title": "Circle Line Extension Set For December 13th — Londonist", "url": "https://londonist.com/2009/11/circle_line_uncircling_set_for_dece" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611122857/https://en.wikipedia.org/wiki/Circle_line_(London_Underground)", "kind": "wikipedia", "tier": "tertiary", "title": "Circle line (London Underground) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Circle_line_(London_Underground)" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260510005356/https://www.davros.org/rail/culg/circle.html", "kind": "other", "tier": "secondary", "title": "CULG — Circle Line", "url": "https://www.davros.org/rail/culg/circle.html" } ] }, { "cityId": "london", "color": "#00782A", "displayNumber": "District", "id": "london-line-district", "name": { "en": "District line (Ealing Broadway ↔ Upminster)" }, "phases": [ { "confidence": "medium", "constructionStart": "1865", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": false, "value": 3000000, "year": 1868 }, "notes": "Cost of the initial South Kensington–Westminster section. '£3 million, almost three times the cost of the Met's original, longer line'. Authorised by the Metropolitan District Railways Act 1864. [Citation chase 2026-06-11] The £3m reflects actual cost driven up by high construction and land-compensation costs (per Wolmar 2004, p.72 and Horne 2006, pp.7–8, as cited on Wikipedia), i.e. an outturn rather than the 1864 authorized figure; both underlying print sources are offline and could not be directly verified.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "South Kensington–Westminster (24 December 1868) ... Cost: £3 million, almost three times the cost of the Met's original, longer line", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ] }, "geometryRef": "london-District", "id": "london-district-1868-initial", "kind": "initial", "label": { "en": "Initial opening: South Kensington → Westminster (Metropolitan District Railway)" }, "notes": "[Date chase 2026-06-12] District Railway (redirect target) confirms enabling Act royal assent 29 July 1864 and a single-contract works letting; Museum of London print dated 1866-67 shows construction near South Kensington underway, consistent with the curated 1865 start.", "opened": "1868-12-24", "segment": { "fromStopIndex": 12, "toStopIndex": 16 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "South Kensington–Westminster (24 December 1868) ... Cost: £3 million, almost three times the cost of the Met's original, longer line", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251011232829/https://www.tube-history.uk/district-line.php", "kind": "other", "quote": "The initial section of the railway cost £3 million to construct, three times the cost of constructing the Metropolitan Railway.", "tier": "secondary", "title": "District line — Tube History", "url": "https://tube-history.uk/district-line.php" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260524173617/https://en.wikipedia.org/wiki/District_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "the construction works for all of the extensions were let as a single contract [following the Metropolitan District Railways Act 1864, royal assent 29 July 1864] ... On 24 December 1868, the District opened its line from South Kensington to Westminster", "tier": "secondary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/District_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260524173617/https://en.wikipedia.org/wiki/District_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "Print dated 1866–67 of 'The construction of the Metropolitan District Railway' near South Kensington. Available from Museum of London", "tier": "secondary", "title": "District Railway — Wikipedia (Museum of London print reference)", "url": "https://en.wikipedia.org/wiki/District_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260317025902/https://en.wikipedia.org/wiki/Westminster_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "The station was opened as Westminster Bridge on 24 December 1868 by the steam-operated District Railway (DR)", "tier": "tertiary", "title": "Westminster tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Westminster_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 5 }, { "confidence": "medium", "geometryRef": "london-District#2", "id": "london-district-1869-west-brompton", "kind": "extension", "label": { "en": "Extension: Gloucester Road → West Brompton" }, "notes": "West Brompton (index 6) on the Wimbledon-branch sub-spine; the shuttle ran from Gloucester Road, which sits on the main spine.", "opened": "1869-04-12", "segment": { "fromStopIndex": 0, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "West Brompton (12 April 1869) - Single track shuttle from Brompton (Gloucester Road)", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613161803/https://en.wikipedia.org/wiki/West_Brompton_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "On 12 April 1869, the District Railway (DR, now the District line) opened its own station adjacent to the WLEJR station as the terminus and only station on its extension from Gloucester Road station", "tier": "tertiary", "title": "West Brompton tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/West_Brompton_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "london-District", "id": "london-district-1870-blackfriars", "kind": "extension", "label": { "en": "Extension: Westminster → Blackfriars (Victoria Embankment)" }, "opened": "1870-05-30", "segment": { "fromStopIndex": 16, "toStopIndex": 19 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Westminster–Blackfriars (30 May 1870) - Stations: Charing Cross (now Embankment), The Temple (now Temple), Blackfriars - Built along Victoria Embankment by the Metropolitan Board of Works", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260606165820/https://en.wikipedia.org/wiki/Embankment_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "The station was opened on 30 May 1870 by the DR (now the District line) when the railway extended its line from Westminster to Blackfriars.", "tier": "tertiary", "title": "Embankment tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Embankment_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260526163537/https://en.wikipedia.org/wiki/Temple_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "Temple station was opened in the parish of St. Clement Danes on 30 May 1870 by the District Railway", "tier": "tertiary", "title": "Temple tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Temple_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 3 }, { "confidence": "medium", "geometryRef": "london-District", "id": "london-district-1871-mansion-house", "kind": "extension", "label": { "en": "Extension: Blackfriars → Mansion House (terminus); District begins running own trains" }, "notes": "[Opening-date chase 2026-06-13] Ceremonial opening banquet (attended by PM Gladstone) was held Saturday 1 July 1871; public service and District's own trains started Monday 3 July 1871. Curated date = revenue-service start.", "opened": "1871-07-03", "segment": { "fromStopIndex": 19, "toStopIndex": 20 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Blackfriars–Mansion House (3 July 1871) ... Opened with opening banquet attended by prime minister William Gladstone", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251215103354/https://en.wikipedia.org/wiki/Mansion_House_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "opened on 3 July 1871 by the Metropolitan District Railway (MDR, now the District line) when the company extended its line eastwards from St. Paul's station", "tier": "tertiary", "title": "Mansion House tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Mansion_House_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "london-District", "id": "london-district-1871-earls-court", "kind": "extension", "label": { "en": "Infill station: Earl's Court opens (West Brompton – Gloucester Road)" }, "notes": "[Opening-date chase 2026-06-13] Dedicated Earl's Court station article gives 30 October 1871 (Monday) in both body and infobox; the Metropolitan District Railway summary gives 31 October. Consider correcting curated date to 1871-10-30 to match the dedicated station source.", "opened": "1871-10-31", "segment": { "fromStopIndex": 10, "toStopIndex": 10 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Earl's Court (31 October 1871) - Station between Gloucester Road and West Brompton", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260522022524/https://en.wikipedia.org/wiki/Earl%27s_Court_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "Local residents near Earl's Court lodged a petition against the DR building the station, which opened on 30 October. [infobox: 30 October 1871 - Opened (District)]", "tier": "tertiary", "title": "Earl's Court tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Earl%27s_Court_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 1 }, { "confidence": "medium", "constructionStart": "1873", "geometryRef": "london-District", "id": "london-district-1874-hammersmith", "kind": "extension", "label": { "en": "Extension: Earl's Court → Hammersmith" }, "notes": "[Date chase 2026-06-12] Authorization year (1873) matches curated construction start; no source gives an explicit ground-breaking date.", "opened": "1874-09-09", "segment": { "fromStopIndex": 7, "toStopIndex": 10 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Hammersmith (9 September 1874) - Authorization: Hammersmith Extension Railway Act 1873 (7 July 1873) - Stations: North End (Fulham, renamed West Kensington 1877), Hammersmith", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260524173617/https://en.wikipedia.org/wiki/District_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "Permission to build a railway 1+1/2 miles long to Hammersmith was granted in the Hammersmith Extension Railway Act 1873 on 7 July 1873, the independent Hammersmith Extension Railway having been formed to raise the necessary capital ... It opened on 9 September 1874", "tier": "secondary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/District_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 2 }, { "confidence": "medium", "geometryRef": "london-District#3", "id": "london-district-1877-richmond", "kind": "extension", "label": { "en": "Extension: Hammersmith → Richmond (over LSWR tracks)" }, "notes": "Mapped to the Richmond-branch sub-spine: Hammersmith (index 35) through Gunnersbury (39), Kew Gardens (40) and Richmond (41). [Opening-date chase 2026-06-13] A separate 1 October 1877 date refers to the Metropolitan Railway restarting a former GWR service to Richmond — a different operator, not the District Railway opening.", "opened": "1877-06-01", "segment": { "fromStopIndex": 35, "toStopIndex": 41 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Richmond (1 June 1877) - Extended from Hammersmith via a 1⁄2-mile (0.80 km) link", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260525152750/https://en.wikipedia.org/wiki/Richmond_station_(London)", "kind": "other", "publisher": "Wikipedia", "quote": "On 1 June 1877, the District Railway (DR) linked its then terminus at Hammersmith to the nearby L&SWR tracks east of the present Ravenscourt Park station. The DR began running trains over the L&SWR tracks to Richmond.", "tier": "tertiary", "title": "Richmond station (London) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Richmond_station_(London)", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ] }, { "confidence": "low", "geometryRef": "london-District", "id": "london-district-1879-ealing-broadway", "kind": "extension", "label": { "en": "Branch opens: Turnham Green → Ealing Broadway" }, "opened": "1879-07-01", "segment": { "fromStopIndex": 0, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260515170724/https://en.wikipedia.org/wiki/Ealing_Broadway_station", "kind": "wikipedia", "quote": "District Railway services commenced on 1 July 1879, when the DR opened a branch from Turnham Green ... This branch extended to Ealing Broadway", "tier": "tertiary", "title": "Ealing Broadway station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Ealing_Broadway_station" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260522022550/https://en.wikipedia.org/wiki/Acton_Town_tube_station", "kind": "wikipedia", "quote": "Acton Town station was opened as Mill Hill Park on 1 July 1879 by the District Railway ... on the District Railway's extension from Turnham Green to Ealing Broadway", "tier": "tertiary", "title": "Acton Town tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Acton_Town_tube_station" } ], "stationCount": 4 }, { "confidence": "medium", "constructionStart": "1878", "geometryRef": "london-District#2", "id": "london-district-1880-putney-bridge", "kind": "extension", "label": { "en": "Branch opens: Earl's Court → Putney Bridge & Fulham" }, "notes": "Mapped to the Wimbledon-branch sub-spine: Fulham Broadway (index 7), Parsons Green (8), Putney Bridge (9); the branch leaves the main spine at Earl's Court. [Date chase 2026-06-12] Authorization year (1878) matches curated construction start; no source gives an explicit ground-breaking date.", "opened": "1880-03-01", "segment": { "fromStopIndex": 6, "toStopIndex": 9 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Putney Bridge/Fulham (1 March 1880) - Authorization: 4 July 1878 - Stations: Walham Green (Fulham Broadway), Parsons Green, Putney Bridge & Fulham", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260524173617/https://en.wikipedia.org/wiki/District_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "On 4 July 1878, permission was granted to extend the West Brompton branch as far as the Thames ... The line opened on 1 March 1880", "tier": "secondary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/District_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 3 }, { "confidence": "medium", "geometryRef": null, "id": "london-district-1883-hounslow", "kind": "extension", "label": { "en": "Branch opens: Mill Hill Park (Acton Town) → Hounslow Town" }, "notes": "On the Hounslow branch (now Piccadilly), not on the drawn spine.", "opened": "1883-05-01", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Hounslow (1 May 1883–1884) ... Hounslow Town opened with stations at South Ealing, Boston Road, Osterley & Spring Grove", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260321232941/https://en.wikipedia.org/wiki/Hounslow_Town_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "Hounslow Town station was opened by the District Railway (DR) on 1 May 1883 as the terminus of a new extension of the DR from Acton Town.", "tier": "tertiary", "title": "Hounslow Town tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hounslow_Town_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 4 }, { "confidence": "medium", "geometryRef": "london-District", "id": "london-district-1884-whitechapel", "kind": "extension", "label": { "en": "Extension: Mansion House → Whitechapel; Inner Circle completed (with Metropolitan Railway)" }, "notes": "[Opening-date chase 2026-06-13] Official opening ceremony and trial running on 17 September 1884; circular revenue service began Monday 6 October 1884. Curated date = revenue-service start.", "opened": "1884-10-06", "segment": { "fromStopIndex": 20, "toStopIndex": 25 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Mansion House–Whitechapel (6 October 1884) - Circular service began Monday 6 October 1884 - New joint stations: Aldgate East, St Mary's", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260208055548/https://en.wikipedia.org/wiki/Aldgate_East_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "The original Aldgate East station opened on 6 October 1884.", "tier": "tertiary", "title": "Aldgate East tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Aldgate_East_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 2 }, { "confidence": "medium", "geometryRef": null, "id": "london-district-1884-hounslow-barracks", "kind": "extension", "label": { "en": "Branch shuttle opens: Hounslow Town → Hounslow Barracks (now Hounslow West)" }, "notes": "On the Hounslow branch (now Piccadilly), not on the drawn spine. [Opening-date chase 2026-06-13] Curated record can be refined from year-only 1884 to 1884-07-21 per the Hounslow West (formerly Hounslow Barracks) station article.", "opened": "1884", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Hounslow Barracks (now West): single-track line opened 1884", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260208145128/https://en.wikipedia.org/wiki/Hounslow_West_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "The station was opened as Hounslow Barracks on a single-track branch of the Hounslow & Metropolitan Railway on 21 July 1884 [infobox: 21 July 1884 - Opened as Hounslow Barracks; terminus of line]", "tier": "tertiary", "title": "Hounslow West tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hounslow_West_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 1 }, { "confidence": "low", "constructionStart": "1887", "geometryRef": "london-District#2", "id": "london-district-1889-wimbledon", "kind": "extension", "label": { "en": "Running rights begin: Putney Bridge → Wimbledon (over LSWR-built line)" }, "notes": "Mapped to the Wimbledon-branch sub-spine: East Putney (index 10), Southfields (11), Wimbledon Park (12), Wimbledon (13). [Date chase 2026-06-12] Putney to Wimbledon line (Wikipedia, citing R A Williams, The London and South Western Railway vol. 2) explicitly dates works/bridge start to April 1887 — direct confirmation of the curated date. [Opening-date chase 2026-06-13] The 27 August 1905 date in related sources refers to the start of District electric working through to Wimbledon, not the initial 1889 steam-worked opening.", "opened": "1889-06-03", "segment": { "fromStopIndex": 9, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20250626132556/https://en.wikipedia.org/wiki/Putney_to_Wimbledon_line", "kind": "wikipedia", "quote": "The District Railway opened the London and South Western Railway-built extension of its line from Putney Bridge on 3 June 1889 ... The Fulham railway bridge (Putney Bridge) was begun in April 1887 and completed by April 1889.", "tier": "tertiary", "title": "Putney to Wimbledon line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Putney_to_Wimbledon_line" } ], "stationCount": 4 }, { "confidence": "medium", "constructionStart": "1897", "geometryRef": "london-District", "id": "london-district-1902-east-ham", "kind": "extension", "label": { "en": "Extension: Whitechapel → East Ham (via Whitechapel & Bow Railway)" }, "notes": "Research lists 3 new stations (Stepney Green, Mile End, Bow Road); the served section runs Whitechapel→East Ham on the spine. [Date chase 2026-06-12] 1897 reflects parliamentary permission (Aug 1897), not ground-breaking; further acts followed in 1898 and 1900, and physical-construction signs (rehousing 1901, station closure for reconstruction Feb 1902) suggest actual works began nearer 1899-1901.", "opened": "1902-06-02", "segment": { "fromStopIndex": 25, "toStopIndex": 33 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Whitechapel–East Ham (2 June 1902) - Authorization: Whitechapel and Bow Railway 1897 - Stations: Stepney Green, Mile End, Bow Road ... Some District services were extended from Whitechapel to East Ham", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260524173617/https://en.wikipedia.org/wiki/District_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "In 1897 the nominally independent Whitechapel and Bow Railway received permission for a link from the District Railway at Whitechapel to the London, Tilbury and Southend Railway (LT&SR) at an above-ground junction at Bow ... The LT&SR and District jointly took over the company the following year and the line opened on 2 June 1902", "tier": "secondary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/District_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260306052659/https://en.wikipedia.org/wiki/East_Ham_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "The Whitechapel and Bow Railway opened on 2 June 1902 and allowed through services of the District Railway to operate to Upminster. Service began at East Ham on 2 June 1902.", "tier": "tertiary", "title": "East Ham tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/East_Ham_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 3 }, { "confidence": "medium", "geometryRef": null, "id": "london-district-1903-south-harrow", "kind": "extension", "label": { "en": "Electric branch opens: Park Royal & Twyford Abbey → South Harrow" }, "notes": "On the Ealing/South Harrow branch later taken over by the Piccadilly line, not on the drawn District spine. [Opening-date chase 2026-06-13] Park Royal opened partially on 23 June 1903 as a shuttle for the Royal Agricultural Show; the full extension to South Harrow opened 28 June 1903 (the curated date).", "opened": "1903-06-28", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Ealing–South Harrow (June-28 June 1903) - Shuttle to Park Royal opened 23 June for Royal Agricultural Show - Main line: 28 June with stations at North Ealing, Park Royal & Twyford Abbey, Perivale-Alperton, Sudbury Town, Sudbury Hill, South Harrow", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260502033304/https://en.wikipedia.org/wiki/Sudbury_Town_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "Sudbury Town station was opened on 28 June 1903 by the District Railway (DR, now the District line) on its new extension to South Harrow from Park Royal & Twyford Abbey.", "tier": "tertiary", "title": "Sudbury Town tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Sudbury_Town_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260201184605/https://en.wikipedia.org/wiki/South_Harrow_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "South Harrow station was opened on 28 June 1903 by the District Railway (DR, now the District line) as the terminus of its new extension from Park Royal & Twyford Abbey.", "tier": "tertiary", "title": "South Harrow tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/South_Harrow_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251122013236/https://en.wikipedia.org/wiki/Park_Royal_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "The District Railway (DR, now the District line) opened the line through Park Royal on its new extension to South Harrow on 23 June 1903.", "tier": "tertiary", "title": "Park Royal tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Park_Royal_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 7 }, { "confidence": "low", "geometryRef": null, "id": "london-district-1905-hounslow-south-acton-electric", "kind": "extension", "label": { "en": "Electric services commence: Hounslow & South Acton branches (first electric conversion)" }, "notes": "Electrification of the off-spine Hounslow and South Acton branches.", "opened": "1905-06-13", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Electric Services Commence (13 June 1905) - Hounslow and South Acton first electric service", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ] }, { "confidence": "low", "geometryRef": "london-District", "id": "london-district-1905-core-electrified", "kind": "extension", "label": { "en": "Electrification of core: Ealing → Whitechapel and Inner Circle electrified" }, "notes": "Electrification of the core Ealing Broadway→Whitechapel route (no new stations).", "opened": "1905-07-01", "segment": { "fromStopIndex": 0, "toStopIndex": 25 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "1 July 1905: Ealing to Whitechapel plus inner circle electrification", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ] }, { "confidence": "medium", "geometryRef": "london-District", "id": "london-district-1908-barking", "kind": "extension", "label": { "en": "Extension: East Ham → Barking (electrified)" }, "opened": "1908-04-01", "segment": { "fromStopIndex": 33, "toStopIndex": 34 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "East Ham–Barking (1 April 1908) - Four tracks were laid and two electrified as far as Barking - Work largely finished by July 1908", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260510211054/https://en.wikipedia.org/wiki/Barking_station", "kind": "other", "publisher": "Wikipedia", "quote": "On 1 April 1908, electric service was extended to Barking.", "tier": "tertiary", "title": "Barking station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Barking_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "london-District", "id": "london-district-1932-upminster", "kind": "extension", "label": { "en": "Extension: Barking → Upminster (District tracks alongside LMS line)" }, "notes": "Research lists 2 new District-platform stations (Upney, Dagenham Heathway); the served section runs Barking→Upminster along the spine. [Opening-date chase 2026-06-13] The 'restarted' wording reflects that District service had been cut back to East Ham in 1905; 1932 was the restoration of through service on electrified tracks to Upminster.", "opened": "1932-09-12", "segment": { "fromStopIndex": 34, "toStopIndex": 42 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "quote": "Barking–Upminster (12 September 1932) - New stations: Upney, Heathway (Dagenham Heathway) - Platforms only on the District tracks", "tier": "tertiary", "title": "District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123114/https://en.wikipedia.org/wiki/District_line", "kind": "wikipedia", "quote": "Services were extended again to Barking in 1908 ... Extended to Upminster; same year Piccadilly line took over Uxbridge branch.", "tier": "tertiary", "title": "District line — Wikipedia", "url": "https://en.wikipedia.org/wiki/District_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251203073902/https://en.wikipedia.org/wiki/Upminster_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "12 September 1932 – District line restarted", "tier": "tertiary", "title": "Upminster tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Upminster_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ], "stationCount": 2 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123114/https://en.wikipedia.org/wiki/District_line", "kind": "wikipedia", "tier": "tertiary", "title": "District line — Wikipedia", "url": "https://en.wikipedia.org/wiki/District_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251116223758/https://en.wikipedia.org/wiki/Metropolitan_District_Railway", "kind": "wikipedia", "tier": "tertiary", "title": "Metropolitan District Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_District_Railway" } ] }, { "cityId": "london", "color": "#F3A9BB", "displayNumber": "Hammersmith & City", "id": "london-line-hammersmith-city", "name": { "en": "Hammersmith & City line (Hammersmith ↔ Barking)" }, "phases": [ { "confidence": "medium", "constructionStart": "1861", "geometryRef": "london-Hammersmith & City", "id": "london-hammersmith-city-1864-initial", "kind": "initial", "label": { "en": "Hammersmith & City Railway opens: Farringdon → Hammersmith (GWR-operated branch off the Metropolitan Railway)" }, "notes": "Authorised by the Hammersmith and City Railway Act 1861; a section of viaduct near Ladbroke Grove collapsed on 6 November 1861, killing six workers. Sources vary on the exact original station list (7 cited for the through GWR Farringdon–Hammersmith service). No reliable construction cost was sourced. [Date chase 2026-06-12] London Reconnections explicitly dates construction start to August 1861; underlying book sources (Jackson 1986 pp.38-40; Wolmar 2004 pp.66-67) are offline and unverified. [Opening-date chase 2026-06-13] Original opening was delayed roughly a year by the 6 November 1861 viaduct collapse near Latimer Road/Ladbroke Grove that killed six workers.", "opened": "1864-06-13", "segment": { "fromStopIndex": 0, "toStopIndex": 14 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427004733/https://en.wikipedia.org/wiki/Hammersmith_%26_City_line", "kind": "wikipedia", "quote": "the line opened on 13 June 1864 with a GWR service from Farringdon to Hammersmith", "tier": "tertiary", "title": "Hammersmith & City line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123131/https://en.wikipedia.org/wiki/Hammersmith_%26_City_Railway#History", "kind": "wikipedia", "quote": "The \"Hammersmith and City Railway Act 1861\" received royal assent on \"22 July 1861\" and was cited as \"24 & 25 Vict. c. clxiv.\"", "tier": "tertiary", "title": "Hammersmith & City Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20240613090734/https://www.londonreconnections.com/2024/the-unknown-hammersmith-city-construction-calamity/", "kind": "other", "quote": "a major construction incident occurred on 6 November 1861 when a section of the viaduct near Ladbroke Grove collapsed due to unstable, waterlogged ground conditions worsened by heavy rain, resulting in the deaths of six workers", "tier": "secondary", "title": "The Unknown Hammersmith & City Construction Calamity — London Reconnections", "url": "https://www.londonreconnections.com/2024/the-unknown-hammersmith-city-construction-calamity/" } ], "stationCount": 7 }, { "confidence": "low", "geometryRef": null, "id": "london-hammersmith-city-1864-addison-road", "kind": "extension", "label": { "en": "Branch service added: Latimer Road → Addison Road (now Kensington (Olympia)) via West London Railway link" }, "notes": "Ran via the West London Railway link near Latimer Road to Addison Road (Kensington Olympia) — off the drawn Hammersmith→Barking spine. Exact day not sourced; year 1864 confirmed.", "opened": "1864", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427004733/https://en.wikipedia.org/wiki/Hammersmith_%26_City_line", "kind": "wikipedia", "quote": "services to Addison Road (now Kensington (Olympia) station) on the West London Railway via a link at Latimer Road starting a few weeks later", "tier": "tertiary", "title": "Hammersmith & City line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" } ] }, { "confidence": "medium", "geometryRef": "london-Hammersmith & City", "id": "london-hammersmith-city-1876-aldgate", "kind": "extension", "label": { "en": "Eastern extension: terminus opens at Aldgate (Metropolitan Railway, served by Hammersmith trains)" }, "notes": "The Metropolitan was extended east of Farringdon to a new Aldgate terminus, extending Hammersmith services eastward. Aldgate proper is not on the spine; mapped to the on-spine eastward reach Farringdon→Aldgate East.", "opened": "1876-11-18", "segment": { "fromStopIndex": 14, "toStopIndex": 18 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427004733/https://en.wikipedia.org/wiki/Hammersmith_%26_City_line", "kind": "wikipedia", "quote": "The railway was extended east of Farringdon and a terminus opened at Aldgate on 18 November 1876", "tier": "tertiary", "title": "Hammersmith & City line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251113022021/https://en.wikipedia.org/wiki/Aldgate_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "Aldgate station was opened on 18 November 1876, with a southbound extension to Tower Hill opening on 25 September 1882", "tier": "tertiary", "title": "Aldgate tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Aldgate_tube_station", "via": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260510005356/https://www.davros.org/rail/culg/circle.html", "kind": "other", "publisher": "davros.org (Clive's Underground Line Guides)", "quote": "Aldgate to Liverpool Street opened [M] — 1876-11-18", "tier": "secondary", "title": "Clive's Underground Line Guides — Circle line", "url": "http://www.davros.org/rail/culg/circle.html", "via": "https://en.wikipedia.org/wiki/Aldgate_tube_station" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": null, "id": "london-hammersmith-city-1884-new-cross", "kind": "extension", "label": { "en": "Service extended over East London Railway: Hammersmith → New Cross" }, "notes": "Ran over the East London Railway to New Cross — off the drawn spine. Exact day within October 1884 not sourced. [Opening-date chase 2026-06-13] Through Hammersmith & City services to New Cross (SER) began 6 October 1884; the 1 October 1884 date applies to Metropolitan/District services from St Mary's only.", "opened": "1884-10", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427004733/https://en.wikipedia.org/wiki/Hammersmith_%26_City_line", "kind": "wikipedia", "quote": "In October 1884, the Met extended some Hammersmith services over the ELR to New Cross", "tier": "tertiary", "title": "Hammersmith & City line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260430084309/https://en.wikipedia.org/wiki/East_London_line", "kind": "other", "publisher": "Wikipedia", "quote": "Metropolitan Railway services from St Mary's to New Cross (SER) and Metropolitan District Railway services from St Mary's to New Cross Gate (LB&SCR) commenced on 1 October 1884. On 6 October through services started from Hammersmith (Hammersmith & City) to New Cross (SER) and from Hammersmith (MDR) to New Cross (LB&SCR).", "tier": "tertiary", "title": "East London line — Wikipedia", "url": "https://en.wikipedia.org/wiki/East_London_line", "via": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" } ] }, { "confidence": "medium", "geometryRef": "london-Hammersmith & City", "id": "london-hammersmith-city-1936-barking", "kind": "extension", "label": { "en": "Service diverted to Barking via Whitechapel & Bow Railway" }, "notes": "Hammersmith & City trains diverted from the East London line to Barking via the Whitechapel & Bow route (Aldgate East→Barking on the spine). Exact date not sourced.", "opened": "1936", "segment": { "fromStopIndex": 18, "toStopIndex": 28 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427004733/https://en.wikipedia.org/wiki/Hammersmith_%26_City_line", "kind": "wikipedia", "quote": "from 1936 some Hammersmith & City line trains were diverted from the East London line to Barking", "tier": "tertiary", "title": "Hammersmith & City line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251126050551/https://en.wikipedia.org/wiki/Whitechapel_%26_Bow_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "The Metropolitan line provided a peak time service from 1936", "tier": "tertiary", "title": "Whitechapel & Bow Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Whitechapel_%26_Bow_Railway", "via": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260425162651/https://en.wikipedia.org/wiki/Metropolitan_line", "kind": "other", "publisher": "Wikipedia", "quote": "In 1936, the line was extended east from Whitechapel to Barking along the tracks of the District line.", "tier": "tertiary", "title": "Metropolitan line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_line", "via": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" } ] }, { "confidence": "medium", "geometryRef": "london-Hammersmith & City", "id": "london-hammersmith-city-1990-rebrand", "kind": "renumber", "label": { "en": "Rebranded as a separate line: Hammersmith & City line gains its own (pink) identity, split from the Metropolitan line" }, "notes": "Identity/rebranding event (no physical construction): the route, previously shown as part of the Metropolitan line, gained its own pink identity. Covers the whole then-existing route. [Opening-date chase 2026-06-13] The operational redesignation occurred 30 July 1990 (Tube map / separate-identity change, per Railway Magazine Oct 1990); 31 July 1990 appears to be the public launch ceremony marked by the pink-balloon release.", "opened": "1990-07-31", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427004733/https://en.wikipedia.org/wiki/Hammersmith_%26_City_line", "kind": "wikipedia", "quote": "The new identity, launched on 31 July 1990, was marked by the release of several hundred pink balloons", "tier": "tertiary", "title": "Hammersmith & City line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260112154440/https://en.wikipedia.org/wiki/Whitechapel_station", "kind": "other", "publisher": "Wikipedia", "quote": "On 30 July 1990, the Hammersmith–Barking service of the Metropolitan line gained a separate identity as the Hammersmith & City line.", "tier": "tertiary", "title": "Whitechapel station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Whitechapel_station", "via": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" } ] }, { "confidence": "medium", "geometryRef": "london-Hammersmith & City", "id": "london-hammersmith-city-2009-barking", "kind": "extension", "label": { "en": "All services extended east to Plaistow / Barking following Whitechapel reconstruction" }, "notes": "Since December 2009 all services run to Plaistow or Barking (Whitechapel→Barking on the spine). Exact day within December 2009 not sourced. [Opening-date chase 2026-06-13] Off-peak extension to Barking began 13 December 2009 (TfL sub-surface railway service-pattern change).", "opened": "2009-12", "segment": { "fromStopIndex": 19, "toStopIndex": 28 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427004733/https://en.wikipedia.org/wiki/Hammersmith_%26_City_line", "kind": "wikipedia", "quote": "since December 2009 all services have been extended to Plaistow or Barking", "tier": "tertiary", "title": "Hammersmith & City line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260112154440/https://en.wikipedia.org/wiki/Whitechapel_station", "kind": "other", "publisher": "Wikipedia", "quote": "From 13 December 2009, off-peak Hammersmith & City line service was extended from Whitechapel to Barking with a daily all-day service at Whitechapel.", "tier": "tertiary", "title": "Whitechapel station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Whitechapel_station", "via": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427004733/https://en.wikipedia.org/wiki/Hammersmith_%26_City_line", "kind": "wikipedia", "tier": "tertiary", "title": "Hammersmith & City line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hammersmith_%26_City_line" } ] }, { "cityId": "london", "color": "#868F98", "displayNumber": "Jubilee", "id": "london-line-jubilee", "name": { "en": "Jubilee line (West Ham ↔ Canons Park)" }, "phases": [ { "confidence": "medium", "constructionStart": "1971", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": true, "value": 90000000, "year": 1979 }, "notes": "Approximate construction cost of the original Stage 1 (Fleet/Jubilee line) tunnel section Baker Street–Charing Cross; widely cited ~£90 million. Treat as estimate — exact outturn not confirmed in primary sources. The line absorbed the existing Stanmore–Baker Street Bakerloo branch (no new stations there); the 3 new stations were Bond Street, Green Park and Charing Cross. [Citation chase 2026-06-11] Per London Reconnections (Jonathan Roberts, 2016), £90m was the outturn cost on completion, up from a 1971 estimate of £35m — i.e. an actual final cost (~£15m per single-track mile at outturn prices), not an estimate. This figure rests on a single secondary source citing no primary record; the previously cited Wikipedia article carries no cost figure.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260516153506/https://en.wikipedia.org/wiki/Jubilee_line", "kind": "wikipedia", "quote": "The Baker Street to Stanmore branch of the Bakerloo line was joined at Baker Street to a new 2.5-mile (4 km) segment into central London, with intermediate stops at Bond Street and Green Park and terminating at a new station at Charing Cross. The work was completed in 1979.", "tier": "tertiary", "title": "Jubilee line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Jubilee_line" } ] }, "geometryRef": "london-Jubilee", "id": "london-jubilee-1979-stage1", "kind": "initial", "label": { "en": "Stage 1 opens: Baker Street → Charing Cross (new tunnel) plus transfer of the Stanmore → Baker Street Bakerloo branch" }, "notes": "Covers the 1979 line as drawn on the Jubilee spine: Green Park (index 10) through Baker Street, St John's Wood and the absorbed Stanmore branch up to Canons Park/Stanmore (index 24). The original Charing Cross stub (Green Park→Charing Cross) is closed and off-spine. Cost was contested in research and settled by tiebreaker. [Date chase 2026-06-12] No primary source dates the Fleet line groundbreaking more precisely than 'in 1971'; year-granularity 1971 is the best-evidenced value. [Opening-date chase 2026-06-13] Ceremonial opening by Prince Charles was 30 April 1979; revenue/public passenger service began 1 May 1979 (the curated date).", "opened": "1979-05-01", "segment": { "fromStopIndex": 10, "toStopIndex": 24 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260516153506/https://en.wikipedia.org/wiki/Jubilee_line", "kind": "wikipedia", "quote": "The Baker Street to Stanmore branch of the Bakerloo line was joined at Baker Street to a new 2.5-mile (4 km) segment into central London, with intermediate stops at Bond Street and Green Park and terminating at a new station at Charing Cross. The work was completed in 1979.", "tier": "tertiary", "title": "Jubilee line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Jubilee_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251207000926/https://tubehistory.uk/jubilee-line.php", "kind": "other", "quote": "The Jubilee line was officially opened by Prince Charles, the Prince of Wales, on 30 April 1979; with passenger services starting in 1 May 1979.", "tier": "tertiary", "title": "Jubilee line — Tube History", "url": "https://tubehistory.uk/jubilee-line.php" }, { "accessedAt": "2026-06-13", "kind": "other", "publisher": "tubehistory.uk", "quote": "The Jubilee line was officially opened by Prince Charles, the Price of Wales, on 30 April 1979; with passenger services starting in 1 May 1979.", "tier": "tertiary", "title": "Jubilee line — Tube History", "url": "https://web.archive.org/web/20251207000926/https://tubehistory.uk/jubilee-line.php", "via": "https://en.wikipedia.org/wiki/Jubilee_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260510005356/https://www.davros.org/rail/culg/jubilee.html", "kind": "other", "publisher": "davros.org (Clive Feather)", "quote": "1979-04-30 Stanmore to Baker Street withdrawn [Bakerloo] 1979-05-01 Stanmore to Baker Street started; Baker Street to Green Park opened; Green Park to Charing Cross opened", "tier": "tertiary", "title": "Jubilee Line — Clive's Underground Line Guides", "url": "http://www.davros.org/rail/culg/jubilee.html#dates", "via": "https://en.wikipedia.org/wiki/Jubilee_line" } ], "stationCount": 3 }, { "confidence": "high", "constructionStart": "1993", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": false, "value": 3500000000, "year": 1999 }, "notes": "£3.5 billion is the final construction cost of the ENTIRE Jubilee Line Extension (Green Park–Stratford, 16 km, all 11 new stations), NOT this stage alone. Original budget at Royal Assent (March 1992) also cited as £3.5 billion. Construction officially began 8 December 1993 at Canary Wharf. [Citation chase 2026-06-11] The £3.5bn figure is the final out-turn cost (railway-technology.com: \"Costing a total of £3.5bn when completed\"; LRB: \"twice as much as it was supposed to\"). Note correction: the original pre-construction estimate was ~£2.1bn (Major's Dec 1993 ceremony quote: \"nearly £2 billion\"), not £3.5bn — the project roughly doubled over its lifetime.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260203072128/https://en.wikipedia.org/wiki/Jubilee_line_extension", "kind": "wikipedia", "quote": "Construction of the project officially began on 8 December 1993, with a ceremony at Canary Wharf attended by Prime Minister John Major.", "tier": "tertiary", "title": "Jubilee Line Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/Jubilee_Line_Extension" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20260313225613/https://www.railway-technology.com/projects/london-jubilee-line-extension/", "kind": "other", "publisher": "Railway Technology", "quote": "Costing a total of £3.5bn when completed, the project had been expected to take just under three years to complete.", "tier": "secondary", "title": "London Underground Jubilee Line Extension — Railway Technology", "url": "https://www.railway-technology.com/projects/london-jubilee-line-extension/", "via": "https://en.wikipedia.org/wiki/Jubilee_Line_Extension" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20260613162012/https://www.lrb.co.uk/the-paper/v27/n09/james-meek/crocodile-s-breath", "kind": "news", "publisher": "London Review of Books", "quote": "the Jubilee Line extension opened it was best known for costing £3.5 billion, twice as much as it was supposed to", "tier": "secondary", "title": "LRB · James Meek · Crocodile's Breath", "url": "https://web.archive.org/web/20110514044104/http://www.lrb.co.uk/v27/n09/james-meek/crocodiles-breath", "via": "https://en.wikipedia.org/wiki/Jubilee_Line_Extension" } ] }, "geometryRef": "london-Jubilee", "id": "london-jubilee-1999-jle-stage1", "kind": "extension", "label": { "en": "JLE Stage 1 opens: Stratford → North Greenwich (Jubilee Line Extension)" }, "notes": "Stratford is the eastern terminus beyond West Ham, not on the drawn spine; mapped to the on-spine West Ham→North Greenwich portion. [Date chase 2026-06-12] Official construction-start ceremony dated 8 December 1993 (first pile driven); note that tunnelling itself did not begin until August 1994 at North Greenwich, but the universally cited start date is the December 1993 ceremony.", "opened": "1999-05-14", "segment": { "fromStopIndex": 0, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260203072128/https://en.wikipedia.org/wiki/Jubilee_line_extension", "kind": "wikipedia", "quote": "The first phase of the extension from Stratford to North Greenwich was opened by the Deputy Prime Minister John Prescott on 14 May 1999.", "tier": "tertiary", "title": "Jubilee Line Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/Jubilee_Line_Extension" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260203072128/https://en.wikipedia.org/wiki/Jubilee_line_extension", "kind": "wikipedia", "quote": "Construction of the project officially began on 8 December 1993, with a ceremony at Canary Wharf attended by Prime Minister John Major.", "tier": "tertiary", "title": "Jubilee Line Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/Jubilee_Line_Extension" }, { "accessedAt": "2026-06-12", "kind": "primary", "publisher": "John Major Archive", "quote": "I'm here now for the start of work on another vital transport link for Docklands and for London. [...] if I press the button in front of me, this huge crane will drive the first pile into the ground.", "tier": "primary", "title": "Mr Major's Comments at Jubilee Line Extension Inaugural Ceremony – 8 December 1993", "url": "https://www.johnmajorarchive.org.uk/1993/mr-majors-comments-at-jubilee-line-extension-inaugural-ceremony-8-december-1993/", "via": "https://en.wikipedia.org/wiki/Jubilee_Line_Extension" }, { "accessedAt": "2026-06-13", "kind": "news", "publisher": "BBC News", "quote": "Friday, May 14, 1999 Published at 09:07 GMT 10:07 UK. Deputy Prime Minister John Prescott has opened the Jubilee Line's much-delayed first section, marking the occasion with a seven-minute rail ride to the Millennium Dome.", "tier": "secondary", "title": "Prescott launches Dome tube link", "url": "https://web.archive.org/web/20230324/https://news.bbc.co.uk/2/hi/uk_news/343506.stm", "via": "https://en.wikipedia.org/wiki/Jubilee_Line_Extension" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260510005356/https://www.davros.org/rail/culg/jubilee.html", "kind": "other", "publisher": "davros.org (Clive Feather)", "quote": "1999-05-14 North Greenwich to Canning Town (1) opened; Canning Town (1) to Stratford started", "tier": "tertiary", "title": "Jubilee Line — Clive's Underground Line Guides", "url": "http://www.davros.org/rail/culg/jubilee.html#dates", "via": "https://en.wikipedia.org/wiki/Jubilee_line" } ], "stationCount": 4 }, { "confidence": "medium", "geometryRef": "london-Jubilee", "id": "london-jubilee-1999-jle-stage2", "kind": "extension", "label": { "en": "JLE Stage 2 opens: North Greenwich → Bermondsey (Canada Water, Canary Wharf, Bermondsey)" }, "notes": "[Opening-date chase 2026-06-13] Canary Wharf and Canada Water partially opened 17 Sep 1999 per Clive's Underground Line Guides; the curated 24 Sep 1999 is the date the full North Greenwich-Bermondsey segment as labelled was complete (Wikipedia, citing Horne 2000 p.80).", "opened": "1999-09-24", "segment": { "fromStopIndex": 2, "toStopIndex": 5 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260203072128/https://en.wikipedia.org/wiki/Jubilee_line_extension", "kind": "wikipedia", "quote": "The second phase between North Greenwich and Bermondsey opened on 24 September 1999.", "tier": "tertiary", "title": "Jubilee Line Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/Jubilee_Line_Extension" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260510005356/https://www.davros.org/rail/culg/jubilee.html", "kind": "other", "publisher": "davros.org (Clive Feather)", "quote": "1999-09-17 Bermondsey to North Greenwich opened; 1999-09-24 Waterloo to Bermondsey opened", "tier": "tertiary", "title": "Jubilee Line — Clive's Underground Line Guides", "url": "http://www.davros.org/rail/culg/jubilee.html#dates", "via": "https://en.wikipedia.org/wiki/Jubilee_line" } ], "stationCount": 3 }, { "confidence": "high", "geometryRef": "london-Jubilee", "id": "london-jubilee-1999-jle-stage3", "kind": "extension", "label": { "en": "JLE Stage 3 opens: Bermondsey → Green Park, linking the extension to the rest of the line (London Bridge, Southwark, Waterloo); Charing Cross dropped from passenger service" }, "notes": "On linking through to Green Park, the original Charing Cross–Green Park section ceased passenger use (retained for emergency/reversing). [Opening-date chase 2026-06-13] This 'final phase' opening explicitly excluded Westminster (still under refurbishment per the BBC report), matching the separate Westminster phase; Charing Cross was withdrawn from Jubilee service the previous day (19 Nov 1999).", "opened": "1999-11-20", "segment": { "fromStopIndex": 5, "toStopIndex": 10 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260203072128/https://en.wikipedia.org/wiki/Jubilee_line_extension", "kind": "wikipedia", "quote": "The extension was linked to the rest of the Jubilee line with the opening of the final phase on 20 November 1999.", "tier": "tertiary", "title": "Jubilee Line Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/Jubilee_Line_Extension" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260516153506/https://en.wikipedia.org/wiki/Jubilee_line", "kind": "wikipedia", "quote": "The section between Charing Cross and Green Park, which diverges to the northwest, is now unused for passenger services but is maintained for emergency use.", "tier": "tertiary", "title": "Jubilee line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Jubilee_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613162014/http://news.bbc.co.uk/2/hi/uk_news/529006.stm", "kind": "news", "publisher": "BBC News", "quote": "Saturday, 20 November, 1999, 09:44 GMT. Jubilee Line finally opens. The final section of London Underground's Jubilee Line extension has opened, linking London to the Millennium Dome. The first train from Stratford in the south east of the city drove through to West Hampstead in the north at 0510 GMT on Saturday. ... But Westminster station, still undergoing refurbishment, will not re-open to Jubilee Line trains until next year.", "tier": "secondary", "title": "Jubilee Line finally opens", "url": "https://web.archive.org/web/20230324/https://news.bbc.co.uk/2/hi/uk_news/529006.stm", "via": "https://en.wikipedia.org/wiki/Jubilee_Line_Extension" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260510005356/https://www.davros.org/rail/culg/jubilee.html", "kind": "other", "publisher": "davros.org (Clive Feather)", "quote": "1999-11-19 Green Park to Charing Cross closed; 1999-11-20 Green Park to Waterloo opened; Southwark [opened]", "tier": "tertiary", "title": "Jubilee Line — Clive's Underground Line Guides", "url": "http://www.davros.org/rail/culg/jubilee.html#dates", "via": "https://en.wikipedia.org/wiki/Jubilee_line" } ], "stationCount": 3 }, { "confidence": "medium", "geometryRef": "london-Jubilee", "id": "london-jubilee-1999-westminster", "kind": "extension", "label": { "en": "JLE final station opens: Westminster" }, "opened": "1999-12-22", "segment": { "fromStopIndex": 9, "toStopIndex": 9 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260203072128/https://en.wikipedia.org/wiki/Jubilee_line_extension", "kind": "wikipedia", "quote": "Westminster – complicated by the interface with the subsurface platforms, which remained in operation during construction – opened on 22 December 1999, shortly before the Millennium Dome deadline.", "tier": "tertiary", "title": "Jubilee Line Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/Jubilee_Line_Extension" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260510005356/https://www.davros.org/rail/culg/jubilee.html", "kind": "other", "publisher": "davros.org (Clive Feather)", "quote": "1999-12-22 Westminster [opened]", "tier": "tertiary", "title": "Jubilee Line — Clive's Underground Line Guides", "url": "http://www.davros.org/rail/culg/jubilee.html#dates", "via": "https://en.wikipedia.org/wiki/Jubilee_line" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260516153506/https://en.wikipedia.org/wiki/Jubilee_line", "kind": "wikipedia", "tier": "tertiary", "title": "Jubilee line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Jubilee_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260203072128/https://en.wikipedia.org/wiki/Jubilee_line_extension", "kind": "wikipedia", "tier": "tertiary", "title": "Jubilee Line Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/Jubilee_Line_Extension" } ] }, { "cityId": "london", "color": "#9B0056", "displayNumber": "Metropolitan", "id": "london-line-metropolitan", "name": { "en": "Metropolitan line (Liverpool Street ↔ Chalfont & Latimer)" }, "phases": [ { "confidence": "medium", "constructionStart": "1860", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": false, "value": 1300000, "year": 1862 }, "notes": "Final construction cost of the original Paddington–Farringdon line; initial estimate ~£1 million, rose during construction. 3.75-mile cut-and-cover line.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "wikipedia", "quote": "By the end of 1862, work was complete at a cost of £1.3 million.", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, "geometryRef": "london-Metropolitan", "id": "london-metropolitan-1863-initial", "kind": "initial", "label": { "en": "Initial line opens: Paddington (Bishop's Road) → Farringdon Street (world's first underground railway)" }, "notes": "The original Paddington→Farringdon line; Paddington and Edgware Road are not on the drawn Metropolitan spine, so this maps to the on-spine Farringdon→Baker Street portion (King's Cross, Euston Square, Great Portland Street). [Date chase 2026-06-12] Construction began March 1860 per Metropolitan Railway Wikipedia (Day & Reed 2008, p.10), confirming the curated 1860 start. [Opening-date chase 2026-06-13] Ceremonial/VIP opening (banquet for 600 shareholders) was 9 Jan 1863; public revenue service began 10 Jan 1863. Curated date is the public opening.", "opened": "1863-01-10", "segment": { "fromStopIndex": 3, "toStopIndex": 7 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "wikipedia", "quote": "The 3.75-mile (6 km) railway opened to the public on 10 January 1863", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260425162651/https://en.wikipedia.org/wiki/Metropolitan_line", "kind": "wikipedia", "quote": "The world's first underground railway, it opened on 10 January 1863 with gas-lit wooden carriages hauled by steam locomotives.", "tier": "tertiary", "title": "Metropolitan line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_line" } ], "stationCount": 7 }, { "confidence": "medium", "geometryRef": null, "id": "london-metropolitan-1864-hammersmith", "kind": "extension", "label": { "en": "Hammersmith & City extension opens: to Hammersmith (via Notting Hill, Shepherd's Bush)" }, "notes": "On the Hammersmith & City branch (now a separate line), not on the drawn Metropolitan spine.", "opened": "1864-06-13", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "wikipedia", "quote": "opened on 13 June 1864 with stations at Notting Hill, Shepherd's Bush, and Hammersmith", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ], "stationCount": 3 }, { "confidence": "medium", "geometryRef": "london-Metropolitan", "id": "london-metropolitan-1865-moorgate", "kind": "extension", "label": { "en": "Eastward extension opens: Farringdon Street → Moorgate Street" }, "opened": "1865-12-23", "segment": { "fromStopIndex": 1, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "wikipedia", "quote": "had opened on 23 December 1865", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, { "confidence": "medium", "geometryRef": null, "id": "london-metropolitan-1868-swiss-cottage", "kind": "extension", "label": { "en": "Metropolitan & St John's Wood Railway opens: Baker Street → Swiss Cottage" }, "notes": "The Baker Street→Swiss Cottage stub runs onto the former St John's Wood line (now the Jubilee); Swiss Cottage is not on the drawn Metropolitan spine.", "opened": "1868-04-13", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1868-04-13 Swiss Cottage to Baker Street opened with through running to the Circle", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "wikipedia", "quote": "opened a single-track railway in tunnel to Swiss Cottage from new platforms at Baker Street...In April 1868", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, { "confidence": "medium", "constructionStart": "1873", "geometryRef": "london-Metropolitan", "id": "london-metropolitan-1875-liverpool-street", "kind": "extension", "label": { "en": "City extension opens: Moorgate → Liverpool Street (junction with the GER)" }, "notes": "[Date chase 2026-06-12] Eastward City extension begun 1873 per Metropolitan Railway Wikipedia (Jackson 1986, pp.69-71), confirming the curated 1873 start; opened to Liverpool Street 1 Feb 1875.", "opened": "1875-02-01", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "wikipedia", "quote": "The first section opened to the Great Eastern Railway's (GER's) recently opened terminus at Liverpool Street on 1 February 1875.", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, { "confidence": "medium", "geometryRef": "london-Metropolitan#2", "id": "london-metropolitan-1876-aldgate", "kind": "extension", "label": { "en": "Aldgate terminus opens: Liverpool Street → Aldgate" }, "notes": "Liverpool Street (index 19) → Aldgate (index 20) on the Uxbridge-arm sub-spine, which carries the Aldgate terminus on its shared central trunk. [Opening-date chase 2026-06-13] Aldgate opened 18 Nov 1876 initially as a shuttle to Bishopsgate; all Met and District trains worked through from 4 Dec 1876.", "opened": "1876-11-18", "segment": { "fromStopIndex": 19, "toStopIndex": 20 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "wikipedia", "quote": "A terminus opened at Aldgate on 18 November 1876, initially for a shuttle service to Bishopsgate before all Met and District trains worked through from 4 December.", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "london-Metropolitan", "id": "london-metropolitan-1880-extension-line", "kind": "extension", "label": { "en": "Extension Line opens: Swiss Cottage → West Hampstead → Willesden Green → Harrow-on-the-Hill (staged 1879–1880)" }, "notes": "Staged: Swiss Cottage–West Hampstead 30 Jun 1879; West Hampstead–Willesden Green 24 Nov 1879; Willesden Green–Harrow-on-the-Hill 2 Aug 1880. Swiss Cottage and the inner West Hampstead/Willesden Green stations are off the drawn spine; mapped to the on-spine Finchley Road→Harrow-on-the-Hill portion. [Opening-date chase 2026-06-13] Staged opening: West Hampstead (single line) 30 Jun 1879, Willesden Green (double track, full service) 24 Nov 1879, Harrow service from Baker Street 2 Aug 1880 (curated final completion).", "opened": "1880-08-02", "segment": { "fromStopIndex": 7, "toStopIndex": 12 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1880-08-02 Harrow-on-the-Hill to Willesden Green opened", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "To serve the Royal Agricultural Society's 1879 show at Kilburn, a single line to West Hampstead opened on 30 June 1879 with a temporary platform at Finchley Road. Double track and a full service to Willesden Green started on 24 November 1879 with a station at Kilburn & Brondesbury. The line was extended 5 miles 37.5 chains to Harrow, the service from Baker Street beginning on 2 August 1880.", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, { "confidence": "medium", "geometryRef": null, "id": "london-metropolitan-1884-inner-circle", "kind": "extension", "label": { "en": "Inner Circle completed: through circular service begins (jointly worked with the District)" }, "notes": "Ceremonial opening 17 September 1884; full circular service began 6 October 1884. The Inner Circle is the shared Circle trackage, not the drawn Metropolitan (Aldgate→Amersham) spine. [Opening-date chase 2026-06-13] Official opening ceremony 17 Sep 1884; public circular revenue service began 6 Oct 1884 (curated date).", "opened": "1884-10-06", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "wikipedia", "quote": "After an official opening ceremony on 17 September and trial running a circular service started on Monday 6 October 1884.", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, { "confidence": "medium", "geometryRef": "london-Metropolitan", "id": "london-metropolitan-1885-pinner", "kind": "extension", "label": { "en": "Extension opens: Harrow-on-the-Hill → Pinner" }, "opened": "1885-05-25", "segment": { "fromStopIndex": 12, "toStopIndex": 14 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1885-05-25 Pinner to Harrow-on-the-Hill opened", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "Pinner was reached in 1885 and an hourly service from Rickmansworth and Northwood to Baker Street started on 1 September 1887.", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "london-Metropolitan", "id": "london-metropolitan-1887-rickmansworth", "kind": "extension", "label": { "en": "Extension opens: Pinner → Rickmansworth (via Northwood, Chorley Wood)" }, "opened": "1887-09-01", "segment": { "fromStopIndex": 14, "toStopIndex": 18 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1887-09-01 Rickmansworth to Pinner opened", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "an hourly service from Rickmansworth and Northwood to Baker Street started on 1 September 1887.", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, { "confidence": "medium", "geometryRef": "london-Metropolitan", "id": "london-metropolitan-1889-chesham", "kind": "extension", "label": { "en": "Extension opens: Rickmansworth → Chesham (via Chalfont Road)" }, "notes": "Chesham itself is on the Chesham branch, off the drawn spine; mapped to the on-spine Rickmansworth→Chalfont & Latimer portion.", "opened": "1889-07-08", "segment": { "fromStopIndex": 18, "toStopIndex": 20 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1889-07-08 Chesham to Rickmansworth opened", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "Services to Chesham calling at Chorley Wood and Chalfont Road (now Chalfont & Latimer) started on 8 July 1889.", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, { "confidence": "medium", "geometryRef": null, "id": "london-metropolitan-1891-verney-junction", "kind": "extension", "label": { "en": "Metropolitan begins working Aylesbury → Verney Junction (former Aylesbury & Buckingham Railway)" }, "notes": "Aylesbury–Verney Junction lies far beyond Amersham, off the drawn spine. Originally the Aylesbury & Buckingham Railway (1868); the Met began working it 1 July 1891. [Opening-date chase 2026-06-13] 1 Jul 1891 is the Met takeover of the Aylesbury & Buckingham Railway (start of Met working to Verney Junction).", "opened": "1891-07-01", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1891-07-01 Verney Junction to Aylesbury (1) started [Metropolitan]", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "The Met took over the A&BR on 1 July 1891", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, { "confidence": "medium", "geometryRef": null, "id": "london-metropolitan-1892-amersham-aylesbury", "kind": "extension", "label": { "en": "Extension opens: Chalfont & Latimer → Amersham → Aylesbury" }, "notes": "Amersham and Aylesbury lie beyond Chalfont & Latimer (the spine's outer end), off the drawn spine. Connection into the joint Aylesbury station opened 1 January 1894.", "opened": "1892-09-01", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1892-09-01 Aylesbury (2) to Amersham opened\" and \"Amersham to Chalfont & Latimer opened", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "a temporary platform at Aylesbury opened on 1 September 1892 with trains calling at Amersham, Great Missenden, Wendover and Stoke Mandeville.", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, { "confidence": "medium", "geometryRef": null, "id": "london-metropolitan-1899-brill", "kind": "extension", "label": { "en": "Brill branch absorbed: Metropolitan begins working Quainton Road → Brill (former Wotton Tramway)" }, "notes": "The Brill branch (former Wotton Tramway) lies beyond Aylesbury, far off the drawn spine. [Opening-date chase 2026-06-13] MR took over Brill Tramway operations 1 Dec 1899 (Brill Tramway article, citing Melton 1984 p.64); the Met Railway article's vaguer 'November 1899' is less precise.", "opened": "1899-12-01", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1899-12-01 Brill to Quainton Road (MR) started [Metropolitan]", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260604122355/https://en.wikipedia.org/wiki/Brill_Tramway", "kind": "other", "publisher": "Wikipedia", "quote": "From 1 December 1899, the MR took over all operations.", "tier": "tertiary", "title": "Brill Tramway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Brill_Tramway", "via": "https://en.wikipedia.org/wiki/Metropolitan_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "it took over operations in November 1899", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, { "confidence": "medium", "geometryRef": "london-Metropolitan#2", "id": "london-metropolitan-1904-uxbridge", "kind": "extension", "label": { "en": "Uxbridge branch opens: Harrow-on-the-Hill → Uxbridge" }, "notes": "Mapped to the Uxbridge-arm sub-spine, Harrow-on-the-Hill (index 7) down to Hillingdon (index 0); Uxbridge itself is the terminus just beyond the drawn end. Electrified the following year (through electric Uxbridge–Baker Street service from 1 January 1905). [Opening-date chase 2026-06-13] Two Wikipedia articles (Harrow and Uxbridge Railway; Uxbridge tube station) confirm 4 Jul 1904; the Met Railway article's 30 Jun 1904 appears to be an error.", "opened": "1904-07-04", "segment": { "fromStopIndex": 0, "toStopIndex": 7 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1904-07-04 Uxbridge to Harrow-on-the-Hill opened", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123444/https://en.wikipedia.org/wiki/Uxbridge_tube_station", "kind": "wikipedia", "quote": "first opened a station in Uxbridge on 4 July 1904", "tier": "tertiary", "title": "Uxbridge tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Uxbridge_tube_station" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251115201221/https://en.wikipedia.org/wiki/Harrow_and_Uxbridge_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "Services on the branch opened on 4 July 1904, with the first service on the line being headed by the steam locomotive Met Loco No. 1, bedecked in bunting.", "tier": "tertiary", "title": "Harrow and Uxbridge Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Harrow_and_Uxbridge_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, { "confidence": "medium", "geometryRef": "london-Metropolitan#3", "id": "london-metropolitan-1925-watford", "kind": "extension", "label": { "en": "Watford branch opens: Moor Park → Watford (with Croxley junction)" }, "notes": "Mapped to the Watford-arm sub-spine: Watford (index 0), Croxley (1), branching off at Moor Park (index 2). [Opening-date chase 2026-06-13] 1-day source conflict: 2 Nov (Watford station article + Davros) vs 3 Nov (Met Railway article); curated 2 Nov backed by the station-specific chronology source.", "opened": "1925-11-02", "segment": { "fromStopIndex": 0, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1925-11-02 Rickmansworth to Croxley opened\" and \"Watford to Moor Park opened", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260425162651/https://en.wikipedia.org/wiki/Metropolitan_line", "kind": "wikipedia", "quote": "A short branch opened from Rickmansworth to Watford in 1925.", "tier": "tertiary", "title": "Metropolitan line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260130012334/https://en.wikipedia.org/wiki/Watford_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "Watford MR station opened on 2 November 1925, with Metropolitan Railway electric trains to Baker Street and LNER steam trains to Marylebone for the first few months.", "tier": "tertiary", "title": "Watford tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Watford_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_Railway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260519152318/https://en.wikipedia.org/wiki/Metropolitan_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "Services started on 3 November 1925 with one intermediate station at Croxley Green", "tier": "tertiary", "title": "Metropolitan Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_Railway", "via": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ], "stationCount": 2 }, { "confidence": "medium", "geometryRef": null, "id": "london-metropolitan-1932-stanmore", "kind": "extension", "label": { "en": "Stanmore branch opens: Wembley Park → Stanmore" }, "notes": "On the Stanmore branch (transferred to the Bakerloo in 1939, now the Jubilee), off the drawn Metropolitan spine. [Opening-date chase 2026-06-13] 1-day source conflict: 10 Dec (Stanmore station article + Davros) vs 9 Dec (Met Railway article); curated 10 Dec backed by the station-specific source.", "opened": "1932-12-10", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1932-12-10 Stanmore to Wembley Park opened", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260425162651/https://en.wikipedia.org/wiki/Metropolitan_line", "kind": "wikipedia", "quote": "After World War I, the 4-mile (6.4 km) Stanmore branch was built from Wembley Park.", "tier": "tertiary", "title": "Metropolitan line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260104160732/https://en.wikipedia.org/wiki/Stanmore_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "Stanmore station was opened on 10 December 1932 by the Metropolitan Railway (now the Metropolitan line).", "tier": "tertiary", "title": "Stanmore tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Stanmore_tube_station", "via": "https://en.wikipedia.org/wiki/Metropolitan_Railway" } ] }, { "closed": "1936-07-04", "confidence": "medium", "geometryRef": null, "id": "london-metropolitan-1936-verney-closure", "kind": "extension", "label": { "en": "Northern outer section closes: Aylesbury → Verney Junction / Quainton Road withdrawn (and Brill branch closed 1935)" }, "notes": "Closure under the LPTB: Brill branch closed 30 November 1935; services beyond Aylesbury withdrawn 4 July 1936. All off the drawn spine.", "opened": "1936-07-04", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1936-07-04 Verney Junction to Quainton Road (MR) closed\" and \"Quainton Road (MR) to Aylesbury (1) withdrawn", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260425162651/https://en.wikipedia.org/wiki/Metropolitan_line", "kind": "wikipedia", "quote": "All services north-west of Aylesbury were withdrawn by 1936", "tier": "tertiary", "title": "Metropolitan line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_line" } ] }, { "closed": "1939-11-19", "confidence": "medium", "geometryRef": null, "id": "london-metropolitan-1939-stanmore-transfer", "kind": "renumber", "label": { "en": "Stanmore branch transferred to the Bakerloo line: Wembley Park → Stanmore Met service withdrawn" }, "notes": "Reassignment, not track closure: the Stanmore branch passed from the Metropolitan to the Bakerloo line on 19 November 1939 (later to the Jubilee, 1979). Off the drawn spine. [Opening-date chase 2026-06-13] 1-day source conflict on the Bakerloo transfer date: 19 Nov (Davros, curated) vs 20 Nov (Stanmore station article).", "opened": "1939-11-19", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1939-11-19 Stanmore to Wembley Park withdrawn", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260104160732/https://en.wikipedia.org/wiki/Stanmore_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "Stanmore branch of the Metropolitan line with its five stopping stations between Finchley Road and Wembley Park was transferred to the Bakerloo line on 20 November 1939.", "tier": "tertiary", "title": "Stanmore tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Stanmore_tube_station", "via": "https://en.wikipedia.org/wiki/Stanmore_tube_station" } ] }, { "closed": "1961-09-10", "confidence": "medium", "geometryRef": null, "id": "london-metropolitan-1961-amersham-cutback", "kind": "extension", "label": { "en": "Aylesbury services transferred to British Railways; Met cut back to Amersham (Rickmansworth–Amersham electrified)" }, "notes": "Met electric services cut back to Amersham/Chesham; Aylesbury services went to British Railways. Amersham and the withdrawn section lie beyond Chalfont & Latimer, off the drawn spine.", "opened": "1961-09-10", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "quote": "1961-09-10 Aylesbury (1) to Amersham withdrawn", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260425162651/https://en.wikipedia.org/wiki/Metropolitan_line", "kind": "wikipedia", "quote": "The rebuilding electrified the line from Rickmansworth to Amersham, transferring all Aylesbury services to British Railways.", "tier": "tertiary", "title": "Metropolitan line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_line" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260425162651/https://en.wikipedia.org/wiki/Metropolitan_line", "kind": "wikipedia", "tier": "tertiary", "title": "Metropolitan line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Metropolitan_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260519215515/https://www.davros.org/rail/culg/metropolitan.html", "kind": "other", "tier": "tertiary", "title": "Clive's Underground Line Guides — Metropolitan Line", "url": "https://www.davros.org/rail/culg/metropolitan.html" } ] }, { "cityId": "london", "color": "#000000", "displayNumber": "Northern", "id": "london-line-northern", "name": { "en": "Northern line (South Wimbledon ↔ Totteridge & Whetstone)" }, "phases": [ { "confidence": "low", "constructionStart": "1886", "geometryRef": "london-Northern", "id": "london-northern-1890-cslr-initial", "kind": "initial", "label": { "en": "C&SLR opens: King William Street → Stockwell (world's first deep-level electric tube)" }, "notes": "The original King William Street terminus (closed 1900) is off the drawn spine; mapped to the on-spine Stockwell→Borough portion (Oval, Kennington, Elephant & Castle). [Date chase 2026-06-12] C&SLR article confirms original-route construction began in 1886; the 1887 Kennington Extensions Act extended work already underway. [Opening-date chase 2026-06-13] Official ceremonial opening was 4 Nov 1890; public revenue service began 18 Dec 1890 (curated date).", "opened": "1890-12-18", "segment": { "fromStopIndex": 8, "toStopIndex": 12 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260527124524/https://en.wikipedia.org/wiki/City_and_South_London_Railway", "kind": "wikipedia", "quote": "Official Opening: November 4, 1890 (by Edward, Prince of Wales); Public Opening: December 18, 1890; Original Route: King William Street to Stockwell, 3.2 miles across 6 stations", "tier": "tertiary", "title": "City and South London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/City_and_South_London_Railway" } ], "stationCount": 6 }, { "closed": "1900-02-26", "confidence": "low", "geometryRef": "london-Northern", "id": "london-northern-1900-bank-reroute", "kind": "extension", "label": { "en": "C&SLR northern reroute opens: London Bridge → Moorgate via Bank (King William Street terminus closed)" }, "opened": "1900-02-26", "segment": { "fromStopIndex": 13, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260527124524/https://en.wikipedia.org/wiki/City_and_South_London_Railway", "kind": "wikipedia", "quote": "the first section of the northern extension opened on Monday 26 February 1900 with stations at London Bridge, Bank, and Moorgate Street.", "tier": "tertiary", "title": "City and South London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/City_and_South_London_Railway" } ], "stationCount": 3 }, { "confidence": "low", "geometryRef": "london-Northern", "id": "london-northern-1900-clapham-common", "kind": "extension", "label": { "en": "C&SLR southern extension opens: Stockwell → Clapham Common (Clapham Road + Clapham Common)" }, "opened": "1900-06-03", "segment": { "fromStopIndex": 6, "toStopIndex": 8 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123457/https://en.wikipedia.org/wiki/City_%26_South_London_Railway", "kind": "wikipedia", "quote": "Southern Extension (June 3, 1900): Clapham Road and Clapham Common stations added", "tier": "tertiary", "title": "City & South London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/City_%26_South_London_Railway" } ], "stationCount": 2 }, { "confidence": "low", "geometryRef": "london-Northern", "id": "london-northern-1901-angel", "kind": "extension", "label": { "en": "C&SLR Angel extension opens: Moorgate → Angel (Old Street, City Road, Angel)" }, "notes": "City Road station (between Old Street and Angel) later closed and is not on the spine; the served section runs Moorgate→Angel.", "opened": "1901-11-17", "segment": { "fromStopIndex": 15, "toStopIndex": 17 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260527124524/https://en.wikipedia.org/wiki/City_and_South_London_Railway", "kind": "wikipedia", "quote": "the rest of the extension opened on 17 November 1901 with stations at Old Street, City Road, and Angel.", "tier": "tertiary", "title": "City and South London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/City_and_South_London_Railway" } ], "stationCount": 3 }, { "confidence": "low", "constructionStart": "1903", "geometryRef": "london-Northern#2", "id": "london-northern-1907-ccehr-initial", "kind": "initial", "label": { "en": "CCE&HR ('Hampstead Tube') opens: Charing Cross (Strand) → Golders Green & Archway (Highgate)" }, "notes": "Mapped to the Edgware/Charing Cross-arm sub-spine, Golders Green (index 4) through Charing Cross (index 15); the Archway arm of the Hampstead Tube runs on the main Northern spine and cannot be captured in the same segment. A placeholder cost (the UERL's £18M all-projects capital) was dropped on review as not a per-line build cost. [Opening-date chase 2026-06-13] 22 June 1907 was both the official opening (Lloyd George) and the start of public service — the public travelled free for the rest of the day.", "opened": "1907-06-22", "segment": { "fromStopIndex": 4, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122153/https://en.wikipedia.org/wiki/Charing_Cross,_Euston_and_Hampstead_Railway", "kind": "wikipedia", "quote": "The official opening on 22 June 1907 was made by David Lloyd George, President of the Board of Trade.", "tier": "tertiary", "title": "Charing Cross, Euston and Hampstead Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Charing_Cross,_Euston_and_Hampstead_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122153/https://en.wikipedia.org/wiki/Charing_Cross,_Euston_and_Hampstead_Railway", "kind": "wikipedia", "quote": "Tunnelling began in September 1903 ... Tunnelling was completed in December 1905", "tier": "tertiary", "title": "Charing Cross, Euston and Hampstead Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Charing_Cross,_Euston_and_Hampstead_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122153/https://en.wikipedia.org/wiki/Charing_Cross,_Euston_and_Hampstead_Railway", "kind": "wikipedia", "quote": "16 stations across two branches ... Main line and Golders Green branch: 12 stations; Highgate branch: 4 stations (including South Kentish Town, which closed in 1924)", "tier": "tertiary", "title": "Charing Cross, Euston and Hampstead Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Charing_Cross,_Euston_and_Hampstead_Railway" } ], "stationCount": 16 }, { "confidence": "low", "geometryRef": "london-Northern", "id": "london-northern-1907-euston", "kind": "extension", "label": { "en": "C&SLR Euston extension opens: Angel → Euston (King's Cross + Euston)" }, "opened": "1907-05-12", "segment": { "fromStopIndex": 17, "toStopIndex": 19 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260527124524/https://en.wikipedia.org/wiki/City_and_South_London_Railway", "kind": "wikipedia", "quote": "the Euston extension was quickly built and opened on 12 May 1907 with stations at King's Cross and Euston.", "tier": "tertiary", "title": "City and South London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/City_and_South_London_Railway" } ], "stationCount": 2 }, { "confidence": "low", "geometryRef": "london-Northern#2", "id": "london-northern-1914-embankment", "kind": "extension", "label": { "en": "CCE&HR south extension opens: Charing Cross (Strand) → Charing Cross/Embankment" }, "notes": "Charing Cross (index 15) → Embankment (index 16) on the Charing Cross-arm sub-spine.", "opened": "1914-04-06", "segment": { "fromStopIndex": 15, "toStopIndex": 18 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122153/https://en.wikipedia.org/wiki/Charing_Cross,_Euston_and_Hampstead_Railway", "kind": "wikipedia", "quote": "1914 Embankment Extension: Opening Date: 6 April 1914 ... Single-platform interchange station constructed via loop tunnel under the Thames.", "tier": "tertiary", "title": "Charing Cross, Euston and Hampstead Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Charing_Cross,_Euston_and_Hampstead_Railway" } ], "stationCount": 1 }, { "confidence": "medium", "constructionStart": "1922", "geometryRef": "london-Northern#2", "id": "london-northern-1923-hendon-central", "kind": "extension", "label": { "en": "CCE&HR Edgware extension (Stage 1) opens: Golders Green → Hendon Central" }, "notes": "Mapped to the Edgware-arm sub-spine: Golders Green (index 4) → Brent Cross (3) → Hendon Central (index 2). [Date chase 2026-06-12] Ceremonial first sod for the Edgware extension was cut at Golders Green on 12 June 1922.", "opened": "1923-11-19", "segment": { "fromStopIndex": 2, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260418003810/https://en.wikipedia.org/wiki/Hendon_Central_tube_station", "kind": "wikipedia", "quote": "the first section of the extension, as far as Hendon Central opened on 19 November 1923. This stage included Brent Cross (then called Brent) tube station.", "tier": "tertiary", "title": "Hendon Central tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hendon_Central_tube_station" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260525192921/https://en.wikipedia.org/wiki/Northern_line", "kind": "wikipedia", "quote": "It extended the CCE&HR line from its terminus at Golders Green to Hendon Central in 1923 and to Edgware in 1924.", "tier": "tertiary", "title": "Northern line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Northern_line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260604122153/https://en.wikipedia.org/wiki/Charing_Cross,_Euston_and_Hampstead_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "Lord Ashfield's group ceremonially cut the first sod to begin the works at Golders Green on 12 June 1922.", "tier": "secondary", "title": "Charing Cross, Euston and Hampstead Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Charing_Cross,_Euston_and_Hampstead_Railway", "via": "https://en.wikipedia.org/wiki/Charing_Cross,_Euston_and_Hampstead_Railway" } ], "stationCount": 2 }, { "closed": "1922-08-08", "confidence": "medium", "constructionStart": "1922", "geometryRef": "london-Northern", "id": "london-northern-1924-euston-camden-link", "kind": "reopening", "label": { "en": "C&SLR reconstruction complete + Camden Town link: Euston → Moorgate reopens with new Euston–Camden Town tunnels" }, "notes": "Euston→Moorgate reopened 20 April 1924 along with the new Euston→Camden Town tunnels; mapped to the on-spine Moorgate→Camden Town portion.", "opened": "1924-04-20", "segment": { "fromStopIndex": 15, "toStopIndex": 20 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260527124524/https://en.wikipedia.org/wiki/City_and_South_London_Railway", "kind": "wikipedia", "quote": "The northern section of the C&SLR between Euston and Moorgate was closed from 8 August 1922 ... The Euston to Moorgate section reopened on 20 April 1924, along with the new tunnels linking Euston to Camden Town", "tier": "tertiary", "title": "City and South London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/City_and_South_London_Railway" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260525192921/https://en.wikipedia.org/wiki/Northern_line", "kind": "other", "publisher": "Wikipedia", "quote": "Construction began in 1922 and this first tunnel opened in 1924.", "tier": "secondary", "title": "Northern line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Northern_line", "via": "https://en.wikipedia.org/wiki/Northern_line" } ] }, { "closed": "1923-11-28", "confidence": "low", "geometryRef": "london-Northern", "id": "london-northern-1924-clapham-reopen", "kind": "reopening", "label": { "en": "C&SLR southern section (Moorgate → Clapham Common) reopens after tunnel enlargement" }, "opened": "1924-12-01", "segment": { "fromStopIndex": 6, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260527124524/https://en.wikipedia.org/wiki/City_and_South_London_Railway", "kind": "wikipedia", "quote": "The rest of the line to Clapham Common reopened on 1 December 1924", "tier": "tertiary", "title": "City and South London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/City_and_South_London_Railway" } ] }, { "confidence": "medium", "geometryRef": "london-Northern#2", "id": "london-northern-1924-edgware", "kind": "extension", "label": { "en": "CCE&HR Edgware extension (Stage 2) opens: Hendon Central → Edgware (Colindale, Burnt Oak, Edgware)" }, "notes": "Mapped to the Edgware-arm sub-spine: Hendon Central (index 2) → Colindale (1) → Burnt Oak (index 0); Edgware itself is the terminus just beyond the drawn end. [Opening-date chase 2026-06-13] Segment opened 18 Aug 1924 (Colindale, Edgware); Burnt Oak station opened later on 27 Oct 1924.", "opened": "1924-08-18", "segment": { "fromStopIndex": 0, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260525192921/https://en.wikipedia.org/wiki/Northern_line", "kind": "wikipedia", "quote": "It extended the CCE&HR line from its terminus at Golders Green to Hendon Central in 1923 and to Edgware in 1924.", "tier": "tertiary", "title": "Northern line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Northern_line" }, { "accessedAt": "2026-06-09", "kind": "other", "quote": "the extension opened to Edgware with an intermediate stop at Colindale on 18th August 1924.", "tier": "tertiary", "title": "Golders Green / Edgware extension — UK Transport Wiki", "url": "https://uktransport.fandom.com/wiki/Golders_Green_tube_station" } ], "stationCount": 3 }, { "confidence": "medium", "cost": { "basis": "outturn", "confidence": "low", "nominal": { "currency": "GBP", "isEstimate": true, "value": 5000000, "year": 1926 }, "notes": "Morden extension cost ~£5M (secondary source ianVisits / LT Museum), employing ~4,600 men, partly funded by a government employment scheme. Approximate. The same date brought into service the Embankment–Kennington connecting tunnels (with new station at Waterloo) merging the C&SLR and CCE&HR; that cost is not separately sourced. [Citation chase 2026-06-11] The £5M figure rests on a single secondary source (a short 2016 ianVisits anniversary blog post) with no inline citations or traceable primary source; it reads as a rounded actual-cost (outturn) figure for the Morden extension. Curated \"high\" confidence is not supported by the evidence.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20240624162607/https://www.ianvisits.co.uk/articles/90th-anniversary-of-the-northern-line-extension-18617/", "kind": "news", "quote": "The extension cost around £5 million to build, and employed some 4,600 men — at a time of high unemployment.", "tier": "secondary", "title": "90th anniversary of the Northern Line extension — ianVisits", "url": "https://www.ianvisits.co.uk/articles/90th-anniversary-of-the-northern-line-extension-18617/" } ] }, "geometryRef": "london-Northern", "id": "london-northern-1926-morden", "kind": "extension", "label": { "en": "Morden extension opens: Clapham Common → Morden + Embankment–Kennington link (Waterloo) joining the two railways" }, "notes": "Clapham Common→Morden mapped to the on-spine Clapham Common→South Wimbledon portion; Morden itself is the terminus just beyond the drawn spine, and the Embankment–Kennington link runs partly on the off-spine Charing Cross branch.", "opened": "1926-09-13", "segment": { "fromStopIndex": 0, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260527124524/https://en.wikipedia.org/wiki/City_and_South_London_Railway", "kind": "wikipedia", "quote": "The Morden extension opened on 13 September 1926", "tier": "tertiary", "title": "City and South London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/City_and_South_London_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260527124524/https://en.wikipedia.org/wiki/City_and_South_London_Railway", "kind": "wikipedia", "quote": "Also on 13 September 1926, a further connection between the CCE&HR and the C&SLR was opened when tunnels were brought into service from the CCE&HR's Charing Cross station (now Embankment) to Kennington station ... An intermediate station was constructed at Waterloo.", "tier": "tertiary", "title": "City and South London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/City_and_South_London_Railway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20240624162607/https://www.ianvisits.co.uk/articles/90th-anniversary-of-the-northern-line-extension-18617/", "kind": "news", "quote": "The extension cost around £5 million to build, and employed some 4,600 men — at a time of high unemployment.", "tier": "secondary", "title": "90th anniversary of the Northern Line extension — ianVisits", "url": "https://www.ianvisits.co.uk/articles/90th-anniversary-of-the-northern-line-extension-18617/" } ], "stationCount": 7 }, { "confidence": "low", "geometryRef": "london-Northern", "id": "london-northern-1926-balham", "kind": "extension", "label": { "en": "Balham station opens (Morden extension intermediate station, delayed)" }, "opened": "1926-12-06", "segment": { "fromStopIndex": 4, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260527124524/https://en.wikipedia.org/wiki/City_and_South_London_Railway", "kind": "wikipedia", "quote": "Balham (opened on 6 December 1926)", "tier": "tertiary", "title": "City and South London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/City_and_South_London_Railway" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "london-Northern", "id": "london-northern-1937-renamed", "kind": "renumber", "label": { "en": "Combined Morden–Edgware line renamed the 'Northern line'" }, "notes": "Identity/renaming event covering the whole then-existing network. [Opening-date chase 2026-06-13] This phase records an administrative renaming (Morden–Edgware line to Northern line), not a new revenue-service opening.", "opened": "1937-08-28", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260525192921/https://en.wikipedia.org/wiki/Northern_line", "kind": "wikipedia", "quote": "the Morden–Edgware line was renamed as the Northern line on 28 August 1937.", "tier": "tertiary", "title": "Northern line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Northern_line" } ] }, { "confidence": "low", "constructionStart": "1936", "geometryRef": "london-Northern", "id": "london-northern-1939-east-finchley", "kind": "extension", "label": { "en": "Northern Heights: tube service extended Archway → East Finchley (new tunnels; Highgate deep-level platforms skipped)" }, "notes": "Initial service skipped the Highgate deep-level platforms (index 24) until 1941; mapped to the Archway→East Finchley span.", "opened": "1939-07-03", "segment": { "fromStopIndex": 23, "toStopIndex": 25 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260525192921/https://en.wikipedia.org/wiki/Northern_line", "kind": "wikipedia", "quote": "an initial service to the rebuilt East Finchley station commenced on 3 July 1939, though trains skipped the deep-level platforms at Highgate until its fitout was completed by 19 January 1941.", "tier": "tertiary", "title": "Northern line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Northern_line" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "london-Northern", "id": "london-northern-1940-high-barnet", "kind": "extension", "label": { "en": "Northern Heights: High Barnet branch electrified — tube service East Finchley → High Barnet" }, "notes": "High Barnet is the branch terminus just beyond the drawn spine; mapped to the on-spine East Finchley→Totteridge & Whetstone portion.", "opened": "1940-04-14", "segment": { "fromStopIndex": 25, "toStopIndex": 29 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260525192921/https://en.wikipedia.org/wiki/Northern_line", "kind": "wikipedia", "quote": "the electrification of the High Barnet branch, over which tube services started on 14 April 1940", "tier": "tertiary", "title": "Northern line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Northern_line" } ], "stationCount": 6 }, { "confidence": "low", "geometryRef": "london-Northern", "id": "london-northern-1941-highgate", "kind": "extension", "label": { "en": "Highgate deep-level platforms open to Northern line trains" }, "notes": "[Opening-date chase 2026-06-13] Deep-level platforms served from 19 Jan 1941 though not all new station buildings were complete (minor construction matter, not partial service).", "opened": "1941-01-19", "segment": { "fromStopIndex": 24, "toStopIndex": 24 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260525192921/https://en.wikipedia.org/wiki/Northern_line", "kind": "wikipedia", "quote": "trains skipped the deep-level platforms at Highgate until its fitout was completed by 19 January 1941.", "tier": "tertiary", "title": "Northern line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Northern_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260525193206/https://en.wikipedia.org/wiki/Highgate_tube_station", "kind": "wikipedia", "quote": "started serving the deep level platforms at Highgate on 19 January 1941", "tier": "tertiary", "title": "Highgate tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Highgate_tube_station" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": null, "id": "london-northern-1941-mill-hill-east", "kind": "reopening", "label": { "en": "Northern Heights: Finchley Central → Mill Hill East branch electrified and reopens as tube service" }, "notes": "Mill Hill East is on its own short branch off Finchley Central, not on the drawn spine.", "opened": "1941-05-18", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260525192921/https://en.wikipedia.org/wiki/Northern_line", "kind": "wikipedia", "quote": "the single-track LNER line to Edgware being electrified as far as Mill Hill East, reopening as a tube service on 18 May 1941", "tier": "tertiary", "title": "Northern line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Northern_line" } ], "stationCount": 1 }, { "confidence": "medium", "constructionStart": "2015", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "GBP", "isEstimate": false, "value": 1100000000, "year": 2021 }, "notes": "Final outturn ~£1.1bn, reported £160M below budget. Some TfL/press sources cite £1.2bn for the wider programme. 3.2 km extension of the Charing Cross branch. [Citation chase 2026-06-11] Final cost confirmed by TfL primary press release (16 Sep 2021): £1.1bn, £160m under the £1.26bn budget authority (increased Jan 2016). The £1.2bn figure refers to the budget authority, not the outturn.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260613162016/https://en.wikipedia.org/wiki/Northern_line_extension", "kind": "wikipedia", "quote": "the extension opened on 20 September 2021 ... around £1.1 billion ... £160 million below budget", "tier": "tertiary", "title": "Northern line extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/Northern_line_extension" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20251216102641/https://tfl.gov.uk/info-for/media/press-releases/2021/september/new-tube-map-unveiled-featuring-new-northern-line-stations-to-open-next-week-as-tube-extends-to-battersea-power-station", "kind": "primary", "publisher": "Transport for London", "quote": "TfL has delivered the Northern Line Extension £160m under budget, bringing its estimated final total cost to £1.1bn, despite the cost pressures brought about by the pandemic.", "tier": "primary", "title": "New Tube map unveiled featuring new Northern line stations to open next week as Tube extends to Battersea Power Station", "url": "https://tfl.gov.uk/info-for/media/press-releases/2021/september/new-tube-map-unveiled-featuring-new-northern-line-stations-to-open-next-week-as-tube-extends-to-battersea-power-station", "via": "https://en.wikipedia.org/wiki/Northern_line_extension" } ] }, "geometryRef": "london-Northern#2", "id": "london-northern-2021-battersea", "kind": "extension", "label": { "en": "Northern line extension opens: Kennington → Battersea Power Station (Nine Elms + Battersea Power Station)" }, "notes": "Mapped to the Charing Cross-arm sub-spine: Kennington (index 18) → Nine Elms (index 19); Battersea Power Station is the terminus just beyond the drawn end. [Date chase 2026-06-12] Formal groundbreaking ceremony held 23 November 2015 at Battersea Power Station; preparatory works also started in 2015.", "opened": "2021-09-20", "segment": { "fromStopIndex": 18, "toStopIndex": 19 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260613162016/https://en.wikipedia.org/wiki/Northern_line_extension", "kind": "wikipedia", "quote": "the extension opened on 20 September 2021 ... around £1.1 billion ... £160 million below budget", "tier": "tertiary", "title": "Northern line extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/Northern_line_extension" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260525192921/https://en.wikipedia.org/wiki/Northern_line", "kind": "wikipedia", "quote": "extended the Charing Cross branch of the line for 3.2 km (2.0 miles) from Kennington to Battersea Power Station, with an intermediate stop at Nine Elms ... construction began in 2015.", "tier": "tertiary", "title": "Northern line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Northern_line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260525193206/https://en.wikipedia.org/wiki/Northern_line_extension_to_Battersea", "kind": "other", "publisher": "Wikipedia", "quote": "Preparation works started on the route in 2015, with Mayor Boris Johnson officially starting construction on 23 November 2015 at a ceremony at Battersea Power Station.", "tier": "secondary", "title": "Northern line extension to Battersea — Wikipedia", "url": "https://en.wikipedia.org/wiki/Northern_line_extension_to_Battersea", "via": "https://en.wikipedia.org/wiki/Northern_line_extension_to_Battersea" } ], "stationCount": 2 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260525192921/https://en.wikipedia.org/wiki/Northern_line", "kind": "wikipedia", "tier": "tertiary", "title": "Northern line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Northern_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260527124524/https://en.wikipedia.org/wiki/City_and_South_London_Railway", "kind": "wikipedia", "tier": "tertiary", "title": "City and South London Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/City_and_South_London_Railway" } ] }, { "cityId": "london", "color": "#0019A8", "displayNumber": "Piccadilly", "id": "london-line-piccadilly", "name": { "en": "Piccadilly line (Hillingdon ↔ Oakwood)" }, "phases": [ { "confidence": "medium", "geometryRef": "london-Piccadilly", "id": "london-piccadilly-1906-initial", "kind": "initial", "label": { "en": "Initial opening: Finsbury Park → Hammersmith (Great Northern, Piccadilly and Brompton Railway)" }, "notes": "A tertiary-only £4M build cost was dropped on review as not a real per-line build cost.", "opened": "1906-12-15", "segment": { "fromStopIndex": 13, "toStopIndex": 30 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "This finalised route, between Finsbury Park and Hammersmith stations, was formally opened on 15 December 1906.", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20250818200450/https://railtransportinlondon.fandom.com/wiki/London_Underground_Piccadilly_Line", "kind": "other", "quote": "The GNP&BR was formally opened on 15 December 1906... The total length of the extension was 12 km (7.5 mi) and it cost £4 million to build.", "tier": "tertiary", "title": "London Underground Piccadilly Line — RailTransportinLondon Wiki", "url": "https://railtransportinlondon.fandom.com/wiki/London_Underground_Piccadilly_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260415100821/https://en.wikipedia.org/wiki/Great_Northern,_Piccadilly_and_Brompton_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "The official opening of the GNP&BR by David Lloyd George, President of the Board of Trade, took place on 15 December 1906.", "tier": "tertiary", "title": "Great Northern, Piccadilly and Brompton Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Great_Northern,_Piccadilly_and_Brompton_Railway", "via": "https://en.wikipedia.org/wiki/Piccadilly_line" } ] }, { "confidence": "medium", "geometryRef": null, "id": "london-piccadilly-1907-aldwych", "kind": "extension", "label": { "en": "Aldwych branch opens: Holborn → Strand (later Aldwych)" }, "notes": "On the Aldwych branch (Holborn→Aldwych), off the drawn spine.", "opened": "1907-11-30", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "On 30 November 1907, the short branch from Holborn to the Strand (later renamed Aldwych) opened", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260605070450/https://en.wikipedia.org/wiki/Aldwych_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "The GNP&BR's main route opened on 15 December 1906, but the Strand branch was not opened until 30 November 1907.", "tier": "tertiary", "title": "Aldwych tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Aldwych_tube_station", "via": "https://en.wikipedia.org/wiki/Piccadilly_line" } ], "stationCount": 1 }, { "confidence": "low", "cost": { "basis": "estimate", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": true, "value": 2300000, "year": 1930 }, "notes": "Estimated £2.3 million covered the whole western programme (Hounslow West and South Harrow extensions plus associated works), not the South Harrow segment alone. Service ran largely over existing District Railway tracks taken over by the Piccadilly line.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "Extensions would instead be to Hounslow Barracks and South Harrow...with an estimated cost of £2.3 million.", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" } ] }, "geometryRef": null, "id": "london-piccadilly-1932-south-harrow", "kind": "extension", "label": { "en": "Western extension begins: Piccadilly trains extended to South Harrow" }, "notes": "South Harrow is on the South Harrow branch beyond Rayners Lane, off the drawn spine. Cost was contested in research and settled by tiebreaker. [Opening-date chase 2026-06-13] Trial runs began 27 June 1932; public revenue service to South Harrow began 4 July 1932 (replaced District line services).", "opened": "1932-07-04", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "On 4 July 1932, services were extended to South Harrow", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" } ] }, { "confidence": "low", "cost": { "basis": "estimate", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": true, "value": 4400000, "year": 1930 }, "notes": "Estimated £4.4 million was for the ENTIRE Finsbury Park–Cockfosters extension (all three stages, 7.6 mi), not this segment alone. Authorised under the 1930 Act. [Citation chase 2026-06-11] The £4.4m estimate traces to a single offline source (Horne 2007, p.66, via Wikipedia); no independent primary or government source corroborating the figure was found online, so confidence is capped at medium.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "it was estimated that ridership on the extension, which would cost £4.4 million", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" } ] }, "geometryRef": "london-Piccadilly", "id": "london-piccadilly-1932-arnos-grove", "kind": "extension", "label": { "en": "Cockfosters extension Stage 1 opens: Finsbury Park → Arnos Grove (Manor House, Turnpike Lane, Wood Green, Bounds Green, Arnos Grove)" }, "notes": "Cost was contested in research and settled by tiebreaker.", "opened": "1932-09-19", "segment": { "fromStopIndex": 30, "toStopIndex": 35 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "The first phase of the extension to Arnos Grove opened on 19 September 1932, without ceremony.", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" } ], "stationCount": 5 }, { "confidence": "low", "geometryRef": "london-Piccadilly#2", "id": "london-piccadilly-1933-northfields", "kind": "extension", "label": { "en": "Western extension: Piccadilly trains extended to Northfields" }, "notes": "Mapped to the Heathrow-arm sub-spine: Northfields (index 7) and South Ealing (index 8), reached via Acton Town (index 9).", "opened": "1933-01-09", "segment": { "fromStopIndex": 6, "toStopIndex": 9 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "Northfields services were introduced on 9 January 1933, and on 13 March, were extended to Hounslow West.", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" } ] }, { "confidence": "low", "geometryRef": "london-Piccadilly", "id": "london-piccadilly-1933-oakwood", "kind": "extension", "label": { "en": "Cockfosters extension Stage 2 opens: Arnos Grove → Enfield West/Oakwood (Southgate, Enfield West)" }, "notes": "Enfield West was later renamed Oakwood (index 37).", "opened": "1933-03-13", "segment": { "fromStopIndex": 35, "toStopIndex": 37 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "The line was further extended to Enfield West on 13 March 1933 and finally to Cockfosters on 31 July 1933", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" } ], "stationCount": 2 }, { "confidence": "low", "geometryRef": "london-Piccadilly#2", "id": "london-piccadilly-1933-hounslow-west", "kind": "extension", "label": { "en": "Western extension: Northfields → Hounslow West (Hounslow Barracks)" }, "notes": "Mapped to the Heathrow-arm sub-spine: Hounslow West (index 2) through Boston Manor (index 6), extending from Northfields.", "opened": "1933-03-13", "segment": { "fromStopIndex": 2, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "Northfields services were introduced on 9 January 1933, and on 13 March, were extended to Hounslow West.", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" } ] }, { "confidence": "medium", "geometryRef": "london-Piccadilly", "id": "london-piccadilly-1933-cockfosters", "kind": "extension", "label": { "en": "Cockfosters extension Stage 3 opens: Enfield West/Oakwood → Cockfosters" }, "notes": "Cockfosters is the line's terminus just beyond the drawn spine (which ends at Oakwood); mapped to the Oakwood index.", "opened": "1933-07-31", "segment": { "fromStopIndex": 37, "toStopIndex": 37 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "The line was further extended to Enfield West on 13 March 1933 and finally to Cockfosters on 31 July 1933", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" }, { "accessedAt": "2026-06-09", "kind": "other", "quote": "Cockfosters opened on 31 July 1933.", "tier": "tertiary", "title": "Piccadilly line extension to Cockfosters — UK Transport Wiki", "url": "https://uktransport.fandom.com/wiki/Piccadilly_line_extension_to_Cockfosters" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "london-Piccadilly", "id": "london-piccadilly-1933-uxbridge", "kind": "extension", "label": { "en": "Western extension: Piccadilly trains extended over District route to Uxbridge" }, "notes": "Uxbridge is the branch terminus beyond Hillingdon (off the drawn spine); mapped to the on-spine Hillingdon→Rayners Lane stretch.", "opened": "1933-10-23", "segment": { "fromStopIndex": 0, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "The extension of Piccadilly line trains to Uxbridge began on 23 October 1933", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" } ] }, { "closed": "1994-09-30", "confidence": "medium", "geometryRef": null, "id": "london-piccadilly-1994-aldwych-closes", "kind": "extension", "label": { "en": "Aldwych branch closes: Holborn → Aldwych shuttle withdrawn" }, "notes": "On the Aldwych branch, off the drawn spine. Date corrected on review: 1907-11-30 was the branch opening; the shuttle was withdrawn 1994-09-30.", "opened": "1994-09-30", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "Now used for commercial filming and training", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260217083308/https://uktransport.fandom.com/wiki/Piccadilly_line", "kind": "other", "quote": "Closure Date: 30 September 1994", "tier": "tertiary", "title": "Piccadilly line — UK Transport Wiki", "url": "https://uktransport.fandom.com/wiki/Piccadilly_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260605070450/https://en.wikipedia.org/wiki/Aldwych_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "Strand (later Aldwych, opened 30 November 1907, closed 30 September 1994)", "tier": "tertiary", "title": "Aldwych tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Aldwych_tube_station", "via": "https://en.wikipedia.org/wiki/Piccadilly_line" } ] }, { "confidence": "medium", "constructionStart": "1971", "cost": { "basis": "estimate", "confidence": "low", "nominal": { "currency": "GBP", "isEstimate": true, "value": 12300000, "year": 1971 }, "notes": "Estimated £12.3 million was for the whole Heathrow extension programme (Hounslow West to Heathrow Central), not the Hatton Cross stage alone. Construction ceremony 27 April 1971; partial government funding from April 1972. [Citation chase 2026-06-11] The £12.3m figure is explicitly an estimated construction cost, sourced ultimately to Mike Horne, The Piccadilly Tube (Capital Transport, 2007, pp. 115–120), a single offline print book; the same Horne citation is reused independently by the Heathrow Terminals 2&3 station article for the same figure.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "On 19 July 1975, the line was extended to Hatton Cross.", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" } ] }, "geometryRef": "london-Piccadilly#2", "id": "london-piccadilly-1975-hatton-cross", "kind": "extension", "label": { "en": "Heathrow extension Stage 1 opens: Hounslow West → Hatton Cross" }, "notes": "Hounslow West (index 2) → Hatton Cross (index 1) on the Heathrow-arm sub-spine. [Date chase 2026-06-12] Construction ceremony (\"first sod\") held 27 April 1971 per Piccadilly line Wikipedia, citing Day/Reed (2008) and Horne (2007), both offline books.", "opened": "1975-07-19", "segment": { "fromStopIndex": 1, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "On 19 July 1975, the line was extended to Hatton Cross.", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613162145/https://en.wikipedia.org/wiki/Hatton_Cross_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "The station opened on 19 July 1975 in the first phase of the extension of the Piccadilly line from Hounslow West to Heathrow Airport and it remained the terminus until Heathrow Central opened on 16 December 1977.", "tier": "tertiary", "title": "Hatton Cross tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hatton_Cross_tube_station", "via": "https://en.wikipedia.org/wiki/Piccadilly_line" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "london-Piccadilly#2", "id": "london-piccadilly-1977-heathrow-central", "kind": "extension", "label": { "en": "Heathrow extension Stage 2 opens: Hatton Cross → Heathrow Central (Terminals 1, 2, 3)" }, "notes": "Hatton Cross (index 1) → Heathrow Central / Terminals 2 & 3 (index 0) on the Heathrow-arm sub-spine. [Opening-date chase 2026-06-13] Inaugurated by the Queen around noon on 16 December 1977; revenue services commenced at 3pm the same day.", "opened": "1977-12-16", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "The Heathrow Central extension was inaugurated by the Queen around noon on 16 December 1977", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613162145/https://en.wikipedia.org/wiki/Hatton_Cross_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "it remained the terminus until Heathrow Central opened on 16 December 1977.", "tier": "tertiary", "title": "Hatton Cross tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hatton_Cross_tube_station", "via": "https://en.wikipedia.org/wiki/Piccadilly_line" } ], "stationCount": 1 }, { "confidence": "medium", "constructionStart": "1983", "cost": { "basis": "estimate", "confidence": "low", "nominal": { "currency": "GBP", "isEstimate": true, "value": 24600000, "year": 1983 }, "notes": "Estimated £24.6 million for the 2.5-mile Terminal 4 loop. Construction began 9 February 1983; commissioned 4 November 1985; opened to the public 1 April 1986. [Citation chase 2026-06-11] A second Wikipedia article (Heathrow Terminal 4 tube station) cites the same LRT News source but gives £23 million for the same scope; the primary LRT News article is print-only and unverifiable, so the £24.6m estimate should be treated as approximate.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "The terminal and station were finally opened a few months later on 1 April 1986", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20260406184725/https://en.wikipedia.org/wiki/Heathrow_Terminal_4_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "London Regional Transport funded the construction of 2.5 mi (4.0 km) of new tunnels, the track and the fit-out of the station, at a cost of £23 million.", "tier": "secondary", "title": "Heathrow Terminal 4 tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Heathrow_Terminal_4_tube_station", "via": "https://en.wikipedia.org/wiki/Piccadilly_line" } ] }, "geometryRef": "london-Piccadilly#2", "id": "london-piccadilly-1986-terminal-4", "kind": "extension", "label": { "en": "Heathrow Terminal 4 loop opens (single-track loop via Terminal 4)" }, "notes": "The Terminal 4 loop is a single-track loop off the Heathrow arm; Terminal 4 is not a separate stop in the branch index, so mapped to the nearest Heathrow node, Terminals 2 & 3 (index 0). [Date chase 2026-06-12] Construction of the Terminal 4 loop extension began 9 February 1983; corroborated by both the Piccadilly line and Heathrow Terminal 4 tube station Wikipedia articles, ultimately sourced to the offline LRT News article by Jim Cobley (28 March 1986). [Opening-date chase 2026-06-13] Ceremonial opening by the Prince and Princess of Wales 1 April 1986; trains first stopped (revenue service) on 12 April 1986 when Terminal 4 began handling flights.", "opened": "1986-04-01", "segment": { "fromStopIndex": 0, "toStopIndex": 0 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "The terminal and station were finally opened a few months later on 1 April 1986", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260406184725/https://en.wikipedia.org/wiki/Heathrow_Terminal_4_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "The station was officially opened by the Prince and Princess of Wales on 1 April 1986, before opening the Terminal 4 itself shortly afterwards. Trains, however, did not stop at the station until 12 April, when the new terminal started to handle flights.", "tier": "tertiary", "title": "Heathrow Terminal 4 tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Heathrow_Terminal_4_tube_station", "via": "https://en.wikipedia.org/wiki/Piccadilly_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613162145/https://en.wikipedia.org/wiki/Hatton_Cross_tube_station", "kind": "other", "publisher": "Wikipedia", "quote": "For the new Terminal 4 at the airport, a single track loop was tunnelled from Hatton Cross to Heathrow Central (now called 'Heathrow Terminals 2 & 3') with an intermediate new Terminal 4 station, which opened on 12 April 1986.", "tier": "tertiary", "title": "Hatton Cross tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Hatton_Cross_tube_station", "via": "https://en.wikipedia.org/wiki/Piccadilly_line" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "london-Piccadilly#2", "id": "london-piccadilly-2008-terminal-5", "kind": "extension", "label": { "en": "Heathrow Terminal 5 extension opens (from Terminals 1, 2, 3 to Terminal 5)" }, "notes": "The Terminal 5 extension is a spur off the Heathrow arm; Terminal 5 is not a separate stop in the branch index, so mapped to the nearest Heathrow node, Terminals 2 & 3 (index 0).", "opened": "2008-03-27", "segment": { "fromStopIndex": 0, "toStopIndex": 0 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "quote": "The station and terminal were opened on 27 March 2008", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250905094609/https://tfl.gov.uk/info-for/media/press-releases/2008/march/first-piccadilly-line-passengers-travel-to-heathrow-terminal-5", "kind": "primary", "publisher": "Transport for London", "quote": "The first Tube passengers travelled to Heathrow Terminal 5 today using the newly extended Piccadilly line and new T5 station.", "tier": "primary", "title": "First Piccadilly Line Passengers Travel to Heathrow Terminal 5 — TfL Press Release", "url": "https://tfl.gov.uk/info-for/media/press-releases/2008/march/first-piccadilly-line-passengers-travel-to-heathrow-terminal-5", "via": "https://en.wikipedia.org/wiki/Piccadilly_line" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604122048/https://en.wikipedia.org/wiki/Piccadilly_line", "kind": "wikipedia", "tier": "tertiary", "title": "Piccadilly line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Piccadilly_line" } ] }, { "cityId": "london", "color": "#009FE0", "displayNumber": "Victoria", "id": "london-line-victoria", "name": { "en": "Victoria line (Brixton ↔ Walthamstow Central)" }, "phases": [ { "confidence": "medium", "constructionStart": "1962", "cost": { "basis": "budget", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": true, "value": 56000000, "year": 1962 }, "notes": "Parliamentary-approval budget of £56M (1962) for the WHOLE Walthamstow–Victoria line, not this segment alone. Secondary sources (Londonist) report the 1962 estimate as ~£55M rising to ~£70M before completion; the Brixton extension was a separately-approved additional cost. [Citation chase 2026-06-11] The £56M figure rests solely on Day & Reed (2010), an offline, independently-unverifiable book; the only accessible primary source (HMSO 1959 report) gives a £55m London Transport estimate for the same whole-line scope, so the exact £56m value is not independently corroborated. The £56M is best characterized as the 1962 parliamentary-approval budget (an authorized amount) rather than a forecast estimate.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123851/https://en.wikipedia.org/wiki/Victoria_line", "kind": "wikipedia", "quote": "After the line gained parliamentary approval on 20 August 1962 with a budget of £56 million, construction began the following month.", "tier": "tertiary", "title": "Victoria line — Wikipedia (construction & budget)", "url": "https://en.wikipedia.org/wiki/Victoria_line" }, { "accessedAt": "2026-06-11", "kind": "primary", "publisher": "Her Majesty's Stationery Office", "quote": "London Transport estimate that the capital cost of the Victoria Line is £55m.", "tier": "primary", "title": "The Victoria Line: Report by the London Travel Committee to the Minister of Transport and Civil Aviation (HMSO, 1959)", "url": "https://archive.org/details/op1265392-1001", "via": "https://en.wikipedia.org/wiki/Victoria_line" } ] }, "geometryRef": "london-Victoria", "id": "london-victoria-1968-stage1", "kind": "initial", "label": { "en": "Stage 1 opens: Walthamstow Central → Highbury & Islington" }, "notes": "[Date chase 2026-06-12] Wikipedia also notes 'Initial construction began in January 1960' for two experimental test tunnels; these were preliminary trial works, not the main line build, so the curated 1962 main construction start is correct. Londonist source was inaccessible (403 live, archive blocked). [Opening-date chase 2026-06-13] No opening ceremony; the line entered normal service directly (first train left Walthamstow Central at 7:32 a.m.). Pure revenue-service opening, no ceremonial-vs-public ambiguity.", "opened": "1968-09-01", "segment": { "fromStopIndex": 10, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123851/https://en.wikipedia.org/wiki/Victoria_line", "kind": "wikipedia", "quote": "The line opened from Walthamstow Central to Highbury & Islington on 1 September 1968.", "tier": "tertiary", "title": "Victoria line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Victoria_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20250910023640/https://londonist.com/london/transport/a-brief-history-of-the-victoria-line", "kind": "news", "quote": "the cost of the line in 1962 was estimated to be £55M ... but rose to £70M before completion", "tier": "secondary", "title": "A Brief History Of The Victoria Line — Londonist", "url": "https://londonist.com/london/transport/a-brief-history-of-the-victoria-line" } ], "stationCount": 6 }, { "confidence": "low", "geometryRef": "london-Victoria", "id": "london-victoria-1968-stage2", "kind": "extension", "label": { "en": "Stage 2 opens: Highbury & Islington → Warren Street (King's Cross St Pancras, Euston, Warren Street)" }, "notes": "[Opening-date chase 2026-06-13] Plain public-service opening with no ceremony; no ceremonial-vs-revenue date split.", "opened": "1968-12-01", "segment": { "fromStopIndex": 7, "toStopIndex": 10 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123851/https://en.wikipedia.org/wiki/Victoria_line", "kind": "wikipedia", "quote": "The next section to Warren Street, opened on 1 December 1968, again without ceremony.", "tier": "tertiary", "title": "Victoria line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Victoria_line" } ], "stationCount": 3 }, { "confidence": "low", "geometryRef": "london-Victoria", "id": "london-victoria-1969-stage3", "kind": "extension", "label": { "en": "Stage 3 opens: Warren Street → Victoria (Oxford Circus, Green Park, Victoria) — formally opened by Queen Elizabeth II" }, "notes": "[Opening-date chase 2026-06-13] Formally opened by Queen Elizabeth II at 11:00 a.m.; open to the general public the same afternoon (by 3:00 p.m.) — ceremonial and revenue-service dates coincide.", "opened": "1969-03-07", "segment": { "fromStopIndex": 4, "toStopIndex": 7 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123851/https://en.wikipedia.org/wiki/Victoria_line", "kind": "wikipedia", "quote": "The line was formally opened by Queen Elizabeth II on 7 March 1969 when it had been completed to Victoria.", "tier": "tertiary", "title": "Victoria line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Victoria_line" } ], "stationCount": 3 }, { "confidence": "low", "cost": { "basis": "estimate", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": true, "value": 15000000, "year": 1966 }, "notes": "Approx £15M additional cost for the Victoria–Brixton extension (approved March 1966) per secondary reporting. Pimlico station on this section was deferred and opened separately in 1972, so this phase added Vauxhall, Stockwell and Brixton. [Citation chase 2026-06-11] A contemporaneous primary source (Hansard, Commons, 2 April 1968) corroborates the extension cost, stating the Brixton extension \"is expected to cost about £16 million\" mid-construction — consistent with the £15M March 1966 approval estimate, the ~£1M difference reflecting estimate growth over time.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20250910023640/https://londonist.com/london/transport/a-brief-history-of-the-victoria-line", "kind": "news", "quote": "plans to expand the Victoria line to Brixton were approved the following month, at an additional cost of £15 million", "tier": "secondary", "title": "A Brief History Of The Victoria Line — Londonist", "url": "https://londonist.com/london/transport/a-brief-history-of-the-victoria-line" } ] }, "geometryRef": "london-Victoria", "id": "london-victoria-1971-stage4", "kind": "extension", "label": { "en": "Stage 4 opens: Victoria → Brixton (Vauxhall, Stockwell, Brixton) — opened by Princess Alexandra" }, "notes": "Pimlico (index 3) within this span was deferred and opened separately in 1972 (next phase). Cost was contested in research and settled by tiebreaker. [Opening-date chase 2026-06-13] Opened by Princess Alexandra (Brixton-to-Vauxhall journey); sources record no separate later public-service date, so 23 July 1971 is both the ceremonial and the public opening. Pimlico station was passed through without stopping at this stage (not yet complete).", "opened": "1971-07-23", "segment": { "fromStopIndex": 0, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123851/https://en.wikipedia.org/wiki/Victoria_line", "kind": "wikipedia", "quote": "It was opened on 23 July 1971 by Princess Alexandra, The Honourable Lady Ogilvy, who made a journey from Brixton to Vauxhall.", "tier": "tertiary", "title": "Victoria line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Victoria_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123851/https://en.wikipedia.org/wiki/Victoria_line", "kind": "wikipedia", "quote": "The 3.5-mile (5.6 km) extension from Victoria to Brixton with stations at Vauxhall and Stockwell was approved in March 1966.", "tier": "tertiary", "title": "Victoria line — Wikipedia (Brixton extension approval)", "url": "https://en.wikipedia.org/wiki/Victoria_line" } ], "stationCount": 3 }, { "confidence": "low", "cost": { "basis": "estimate", "confidence": "high", "nominal": { "currency": "GBP", "isEstimate": true, "value": 1400000, "year": 1968 }, "notes": "Total estimated cost of building Pimlico station alone; approved June 1968, opened 14 September 1972. Only Victoria line station with no interchange. [Citation chase 2026-06-11] The £1.4m figure is the pre-construction estimate from Minister of Transport Richard Marsh's approval, confirmed by a Hansard written answer (28 June 1968) and London Transport Magazine (July 1968), both stating the cost was \"estimated at £1.4 million.\"", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251216001328/https://en.wikipedia.org/wiki/Pimlico_tube_station", "kind": "wikipedia", "quote": "The station was opened by the Lord Mayor of Westminster on 14 September 1972 ... The total estimated cost was £1.4 million.", "tier": "tertiary", "title": "Pimlico tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Pimlico_tube_station" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20250826062117/https://api.parliament.uk/historic-hansard/written-answers/1968/jun/28/victoria-line-extension-pimlico-station", "kind": "primary", "publisher": "UK Parliament (Hansard)", "quote": "I have today approved a proposal by the London Transport Board to build a station at Pimlico on the Brixton extension of the Victoria Line. The cost is estimated at £1.4 million.", "tier": "primary", "title": "Victoria Line Extension (Pimlico Station)", "url": "https://api.parliament.uk/historic-hansard/written-answers/1968/jun/28/victoria-line-extension-pimlico-station", "via": "https://en.wikipedia.org/wiki/Pimlico_tube_station" } ] }, "geometryRef": "london-Victoria", "id": "london-victoria-1972-pimlico", "kind": "extension", "label": { "en": "Pimlico station opens (infill station on the Victoria–Brixton section)" }, "notes": "[Opening-date chase 2026-06-13] Opened by the Lord Mayor of Westminster and began serving regular passengers the same afternoon — ceremony and revenue service on the same date. Infill station completed more than a year after the rest of the line became fully operational.", "opened": "1972-09-14", "segment": { "fromStopIndex": 3, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123851/https://en.wikipedia.org/wiki/Victoria_line", "kind": "wikipedia", "quote": "The final piece of the Victoria line, Pimlico station, opened on 14 September 1972.", "tier": "tertiary", "title": "Victoria line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Victoria_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251216001328/https://en.wikipedia.org/wiki/Pimlico_tube_station", "kind": "wikipedia", "quote": "The station was opened by the Lord Mayor of Westminster on 14 September 1972 ... The total estimated cost was £1.4 million.", "tier": "tertiary", "title": "Pimlico tube station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Pimlico_tube_station" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123851/https://en.wikipedia.org/wiki/Victoria_line", "kind": "wikipedia", "tier": "tertiary", "title": "Victoria line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Victoria_line" } ] }, { "cityId": "london", "color": "#66CCCC", "displayNumber": "Waterloo & City", "id": "london-line-waterloo-city", "name": { "en": "Waterloo & City line (Waterloo ↔ Bank)" }, "phases": [ { "confidence": "medium", "constructionStart": "1894", "cost": { "basis": "budget", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": false, "value": 229064, "year": 1894 }, "notes": "Construction contract sum awarded to John Mowlem & Co for building the railway (contract ~1894). Wikipedia gives an inflation equivalent of £25,740,000 in 2025. The 1891 enabling bill separately authorised capital of £500,000 (an authorisation figure, not the build cost). The small absolute value is correct — it is the contract sum, not a millions shorthand. [Citation chase 2026-06-11] The £229,064 figure traces to a single offline specialist monograph (J.C. Gillham, \"The Waterloo & City Railway\", Oakwood Press, 2001) via Wikipedia; it is the build-contract sum (a contracted/authorized amount), not a verified actual final outturn.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260515215719/https://en.wikipedia.org/wiki/Waterloo_%26_City_line", "kind": "wikipedia", "quote": "a contract was awarded to John Mowlem & Co for the sum of £229,064", "tier": "tertiary", "title": "Waterloo & City line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Waterloo_%26_City_line" } ] }, "geometryRef": "london-Waterloo & City", "id": "london-waterloo-city-1898-initial", "kind": "initial", "label": { "en": "Line opens: Waterloo → Bank (Waterloo & City Railway, \"The Drain\")" }, "notes": "[Date chase 2026-06-12] Construction-start date (18 June 1894, Mowlem began work) is supported only by the already-curated Wikipedia source; surrounding wikitext cites offline print sources (Gillham 2001; The Engineer, 26 July 1895). The TfL Research Guide No. 29 PDF primary source is a dead link (HTTP 404) and its web.archive.org copy was inaccessible from this environment, so it could not be independently verified. [Opening-date chase 2026-06-13] The 11 July 1898 TfL Research Guide date is the ceremonial/VIP opening by Prince George, Duke of Cambridge; the curated 8 August 1898 correctly records the public/revenue-service opening (~4 weeks later).", "opened": "1898-08-08", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260515215719/https://en.wikipedia.org/wiki/Waterloo_%26_City_line", "kind": "wikipedia", "quote": "The Waterloo and City Railway opened to the public at 8 a.m. on Monday 8 August 1898, with a train leaving each terminal simultaneously.", "tier": "tertiary", "title": "Waterloo & City line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Waterloo_%26_City_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260515215719/https://en.wikipedia.org/wiki/Waterloo_%26_City_line", "kind": "wikipedia", "quote": "Mowlem began work on 18 June 1894, first building staging in the river about 500 feet (150 m) west of Blackfriars Bridge.", "tier": "tertiary", "title": "Waterloo & City line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Waterloo_%26_City_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251126135124/https://content.tfl.gov.uk/research-guide-no-29-brief-history-of-the-waterloo-and-city-line.pdf", "kind": "primary", "quote": "The Waterloo and City railway opened on 11 July 1898 by Prince George, the Duke of Cambridge.", "tier": "primary", "title": "A Brief History of the Waterloo & City Line — TfL Research Guide No. 29", "url": "https://content.tfl.gov.uk/research-guide-no-29-brief-history-of-the-waterloo-and-city-line.pdf" } ], "stationCount": 2 }, { "closed": "2020-03-01", "confidence": "medium", "geometryRef": "london-Waterloo & City", "id": "london-waterloo-city-2021-covid-reopening", "kind": "reopening", "label": { "en": "COVID-19 closure and reopening: line suspended (Mar 2020), reopens Waterloo ↔ Bank" }, "notes": "Suspended March 2020 due to the COVID-19 pandemic; exact closure day approximated to 2020-03-01. Reopened 4 June 2021. [Opening-date chase 2026-06-13] Day discrepancy: TfL primary press release says reopening was 'Monday 07 June' 2021 and BBC is dated 7 June; Wikipedia's '4 June 2021' (4 June was a Friday) appears to be a Wikipedia error. Likely correct day is 2021-06-07.", "opened": "2021-06-04", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260515215719/https://en.wikipedia.org/wiki/Waterloo_%26_City_line", "kind": "wikipedia", "quote": "The line reopened ahead of schedule on 4 June 2021, initially operating a peak hour only service on weekday mornings and evenings", "tier": "tertiary", "title": "Waterloo & City line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Waterloo_%26_City_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251118112123/https://tfl.gov.uk/info-for/media/press-releases/2021/june/waterloo-and-city-line-to-re-open-ahead-of-schedule", "kind": "primary", "quote": "Waterloo & City line to re-open ahead of schedule", "tier": "primary", "title": "Waterloo & City line to re-open ahead of schedule — Transport for London (press release)", "url": "https://tfl.gov.uk/info-for/media/press-releases/2021/june/waterloo-and-city-line-to-re-open-ahead-of-schedule" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260515215719/https://en.wikipedia.org/wiki/Waterloo_%26_City_line", "kind": "wikipedia", "tier": "tertiary", "title": "Waterloo & City line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Waterloo_%26_City_line" } ] }, { "cityId": "london", "color": "#6950A1", "displayNumber": "Elizabeth", "id": "london-line-elizabeth", "name": { "en": "Elizabeth line (Reading/Heathrow ↔ Shenfield/Abbey Wood)" }, "phases": [ { "confidence": "low", "geometryRef": null, "id": "london-elizabeth-2015-shenfield-takeover", "kind": "initial", "label": { "en": "TfL Rail takeover: Liverpool Street (main line) → Shenfield (existing eastern branch transferred from Abellio Greater Anglia)" }, "notes": "Not new construction — TfL took over the existing Shenfield metro service under the interim 'TfL Rail' brand. The Elizabeth line has no drawn geometry, so all phases are non-drawable.", "opened": "2015-05-31", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260511115013/https://en.wikipedia.org/wiki/Elizabeth_line", "kind": "wikipedia", "quote": "Existing 'metro' service between Liverpool Street (main line station) and Shenfield transferred from Abellio Greater Anglia to TfL Rail", "tier": "tertiary", "title": "Elizabeth line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Elizabeth_line" } ] }, { "confidence": "low", "geometryRef": null, "id": "london-elizabeth-2017-class-345-east", "kind": "extension", "label": { "en": "Class 345 trains introduced: Liverpool Street → Shenfield (reduced-length, TfL Rail)" }, "notes": "Rolling-stock/service milestone on the existing eastern branch, not new construction. No drawn geometry.", "opened": "2017-06-22", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260511115013/https://en.wikipedia.org/wiki/Elizabeth_line", "kind": "wikipedia", "quote": "Class 345 trains began operating between Liverpool Street and Shenfield on 22 June 2017 in reduced-length format.", "tier": "tertiary", "title": "Elizabeth line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Elizabeth_line" } ] }, { "confidence": "low", "geometryRef": null, "id": "london-elizabeth-2018-heathrow-takeover", "kind": "extension", "label": { "en": "TfL Rail takeover: Paddington (main line) → Heathrow Terminal 4 (transferred from Heathrow Connect)" }, "notes": "Service takeover of the existing Heathrow Connect route under the TfL Rail brand, not new construction. No drawn geometry.", "opened": "2018-05-20", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260511115013/https://en.wikipedia.org/wiki/Elizabeth_line", "kind": "wikipedia", "quote": "Existing service between Paddington (main line station) and Heathrow Terminal 4 transferred from Heathrow Connect", "tier": "tertiary", "title": "Elizabeth line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Elizabeth_line" } ] }, { "confidence": "low", "geometryRef": null, "id": "london-elizabeth-2019-reading-takeover", "kind": "extension", "label": { "en": "TfL Rail takeover: Paddington → Reading (most stopping services transferred from Great Western Railway)" }, "notes": "Service takeover of existing GWR stopping services on the western branch, not new construction. No drawn geometry. [Opening-date chase 2026-06-13] A soft/trial launch ran the first TfL trains to Reading on 25 November 2019; the full official transfer was 15 December 2019 (the curated date).", "opened": "2019-12-15", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260511115013/https://en.wikipedia.org/wiki/Elizabeth_line", "kind": "wikipedia", "quote": "Most stopping services between Paddington and Reading transferred from Great Western Railway to TfL Rail", "tier": "tertiary", "title": "Elizabeth line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Elizabeth_line" } ] }, { "confidence": "low", "geometryRef": null, "id": "london-elizabeth-2020-class-345-west", "kind": "extension", "label": { "en": "Class 345 trains introduced: Paddington → Heathrow (TfL Rail western branch)" }, "notes": "Rolling-stock milestone on the existing western branch, not new construction. No drawn geometry.", "opened": "2020-07-30", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260511115013/https://en.wikipedia.org/wiki/Elizabeth_line", "kind": "wikipedia", "quote": "Class 345 trains began running between Paddington and Heathrow on 30 July 2020.", "tier": "tertiary", "title": "Elizabeth line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Elizabeth_line" } ] }, { "confidence": "medium", "constructionStart": "2009", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": false, "value": 18900000000, "year": 2022 }, "notes": "Final outturn cost of the ENTIRE Crossrail central-section project (new tunnels + 10 new stations + systems), not this opening day alone. Original 2008/2010 budget was £14.8bn–£15.9bn; final cost £18.9bn (£18.8bn cited by some sources). Construction works began 15 May 2009 (piling at Canary Wharf). [Citation chase 2026-06-11] Accessible primary sources (Crossrail Ltd \"Funding\" page, May 2022 snapshot; Reuters, 24 May 2022) describe the figure as an agreed £18.8bn funding envelope; £18.9bn rests only on the inaccessible parliament written answer HL242. The \"£13.8 billion original estimate\" in the cited quote is not corroborated by any Wikipedia version (which uses £14.8bn/£15.9bn). [TCP cross-validation 2026-06-13] Basis corrected budget→outturn: £18.9bn is the delivered whole-programme cost (NAO), not the budget (£14.8bn funding envelope, 2010). The figure spans the whole Crossrail programme (central tunnels + Network Rail surface upgrades + systems), which is broader than the Transit Costs Project boundary of £13.3bn (2015, central tunnelled section only) — the ~42% gap is scope+year+basis, not a value error.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260515170712/https://en.wikipedia.org/wiki/Crossrail", "kind": "wikipedia", "quote": "construction cost £18.9 billion, well above the original estimate of £13.8 billion", "tier": "tertiary", "title": "Crossrail — Wikipedia", "url": "https://en.wikipedia.org/wiki/Crossrail" }, { "accessedAt": "2026-06-11", "kind": "primary", "publisher": "Crossrail Ltd", "quote": "The total funding envelope is now £18.8 billion. Both the Department for Transport (DfT) and Transport for London (TfL) remain committed to the successful delivery of the project and have agreed an overall funding envelope of £18.8 billion for delivery of the project.", "tier": "secondary", "title": "Funding — Crossrail Ltd", "url": "https://web.archive.org/web/20220520012858/https://www.crossrail.co.uk/about-us/funding", "via": "https://en.wikipedia.org/wiki/Crossrail" } ] }, "geometryRef": null, "id": "london-elizabeth-2022-central-section", "kind": "initial", "label": { "en": "Central section opens: Paddington (low level) → Abbey Wood (new twin tunnels and central stations; Elizabeth line branding begins)" }, "notes": "The only genuinely new construction on the line: 26 km of new twin-bore tunnels and 9 new central stations, opened initially as a self-contained Paddington–Abbey Wood shuttle. The Elizabeth line has no drawn geometry. [Date chase 2026-06-12] Construction start 15 May 2009 (piling at future Canary Wharf station); ceremony attended by PM Gordon Brown and Mayor Boris Johnson. Underlying primary source is a Contract Journal article (Neil Gerrard, 15 May 2009); its original URL is dead and the web.archive.org copy was inaccessible in this environment. [Opening-date chase 2026-06-13] Queen Elizabeth II ceremonially opened the line on 17 May 2022; the curated 24 May 2022 is the public revenue-service date. Bond Street was excluded at this opening and initial Sunday services were suspended for further testing.", "opened": "2022-05-24", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260511115013/https://en.wikipedia.org/wiki/Elizabeth_line", "kind": "wikipedia", "quote": "Services between Paddington and Abbey Wood begin", "tier": "tertiary", "title": "Elizabeth line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Elizabeth_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260515170712/https://en.wikipedia.org/wiki/Crossrail", "kind": "wikipedia", "quote": "Work began on 15 May 2009 when piling works started at the future Canary Wharf station.", "tier": "tertiary", "title": "Crossrail — Wikipedia", "url": "https://en.wikipedia.org/wiki/Crossrail" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20160117062040/http://www.contractjournal.com/Articles/2009/05/15/67882/work-officially-starts-on-crossrail-photos.html", "kind": "news", "publisher": "Contract Journal", "quote": "Work officially starts on Crossrail [headline; dated 15 May 2009]", "tier": "secondary", "title": "Work officially starts on Crossrail", "url": "http://www.contractjournal.com/Articles/2009/05/15/67882/work-officially-starts-on-crossrail-photos.html", "via": "https://en.wikipedia.org/wiki/Elizabeth_line" } ], "stationCount": 9 }, { "confidence": "low", "geometryRef": null, "id": "london-elizabeth-2022-bond-street", "kind": "extension", "label": { "en": "Bond Street station opens (delayed central-section station)" }, "notes": "Bond Street was the 10th new central station; it opened ~5 months after the rest of the central section. No drawn geometry.", "opened": "2022-10-24", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260515170712/https://en.wikipedia.org/wiki/Crossrail", "kind": "wikipedia", "quote": "Bond Street opened on 24 October 2022", "tier": "tertiary", "title": "Crossrail — Wikipedia", "url": "https://en.wikipedia.org/wiki/Crossrail" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": null, "id": "london-elizabeth-2022-through-running", "kind": "extension", "label": { "en": "Through-running begins: Reading/Heathrow → Abbey Wood and Shenfield → Paddington (branches joined to central tunnel)" }, "notes": "No new stations; the previously separate eastern/western branches were connected through the new central tunnel. No drawn geometry.", "opened": "2022-11-06", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260511115013/https://en.wikipedia.org/wiki/Elizabeth_line", "kind": "wikipedia", "quote": "Services begin between Paddington and Shenfield; and between Reading and Abbey Wood; and between Heathrow and Abbey Wood", "tier": "tertiary", "title": "Elizabeth line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Elizabeth_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260515170712/https://en.wikipedia.org/wiki/Crossrail", "kind": "wikipedia", "quote": "From Sunday 6 November trains began running directly from Reading and Heathrow in the west to Abbey Wood", "tier": "tertiary", "title": "Crossrail — Wikipedia", "url": "https://en.wikipedia.org/wiki/Crossrail" } ] }, { "confidence": "low", "geometryRef": null, "id": "london-elizabeth-2023-full-timetable", "kind": "extension", "label": { "en": "Full timetable / complete through service: Heathrow & Reading → Abbey Wood and Shenfield" }, "notes": "Final stage delivering the complete integrated timetable with full through-running. No new stations and no drawn geometry. [Opening-date chase 2026-06-13] Best-evidenced date is 22 May 2023 (Monday) per the primary TfL press release announcing the full peak timetable; the curated 2023-05-21 is one day early. Same-year, day-level variance only.", "opened": "2023-05-21", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260511115013/https://en.wikipedia.org/wiki/Elizabeth_line", "kind": "wikipedia", "quote": "Full route opens, with services between Heathrow and both Abbey Wood and Shenfield", "tier": "tertiary", "title": "Elizabeth line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Elizabeth_line" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260511115013/https://en.wikipedia.org/wiki/Elizabeth_line", "kind": "wikipedia", "tier": "tertiary", "title": "Elizabeth line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Elizabeth_line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260515170712/https://en.wikipedia.org/wiki/Crossrail", "kind": "wikipedia", "tier": "tertiary", "title": "Crossrail — Wikipedia", "url": "https://en.wikipedia.org/wiki/Crossrail" } ] }, { "cityId": "london", "color": "#00B2A9", "displayNumber": "DLR", "id": "london-line-DLR", "name": { "en": "Docklands Light Railway (DLR)" }, "phases": [ { "confidence": "high", "constructionStart": "1985", "cost": { "basis": "budget", "confidence": "high", "nominal": { "currency": "GBP", "isEstimate": true, "value": 77000000, "year": 1984 }, "notes": "£77M was the government funding/budget cap the joint venture had to build the whole initial system within — a budget, not a final outturn. Covers the entire 1987 network (both this phase and the Tower Gateway stub phase); recorded once here to avoid double-counting.", "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "Construction of the system began shortly after in 1985, with the joint venture careful to minimise costs in light of the £77 million budget.", "tier": "tertiary", "title": "Docklands Light Railway — Wikipedia (£77M budget)", "url": "https://en.wikipedia.org/wiki/Docklands_Light_Railway" } ] }, "geometryRef": "london-DLR", "id": "london-dlr-1987-initial", "kind": "initial", "label": { "en": "Initial system: Tower Gateway/Stratford → Island Gardens (Isle of Dogs & Stratford branch)" }, "notes": "Original DLR network opened to passengers 31 Aug 1987 (Queen Elizabeth II ceremonial opening 30 Jul 1987 — revenue service is the later date). This phase draws the Isle of Dogs spine (Island Gardens↔Poplar) and the Stratford branch (Poplar↔Stratford); the Tower Gateway stub of the same 1987 opening is a separate drawable phase (shared cost recorded here). Langdon Park (2007 infill) sits on this 1987 track — its dot may read early. The £77M figure is the whole initial-system budget.", "opened": "1987-08-31", "segment": { "fromStopIndex": 5, "toStopIndex": 18 }, "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "The railway was formally opened by Queen Elizabeth II on 30 July 1987, and passenger services began on 31 August.", "tier": "tertiary", "title": "Docklands Light Railway — Wikipedia (opened 31 Aug 1987)", "url": "https://en.wikipedia.org/wiki/Docklands_Light_Railway" }, { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "The initial system comprised two routes, from Tower Gateway and Stratford to Island Gardens ... serving 15 stations.", "tier": "tertiary", "title": "Docklands Light Railway — Wikipedia (initial 15-station network)", "url": "https://en.wikipedia.org/wiki/Docklands_Light_Railway" } ], "stationCount": 15 }, { "confidence": "high", "constructionStart": "1985", "geometryRef": "london-DLR#2", "id": "london-dlr-1987-tower-gateway", "kind": "initial", "label": { "en": "Initial system: Tower Gateway stub (Tower Gateway → Poplar)" }, "notes": "The Tower Gateway ↔ Poplar arm of the same 1987 initial opening, drawn on the Tower Gateway spine (its Shadwell/Limehouse/Westferry stations are counted in the 15-station initial total on the sibling phase). No separate cost — the whole 1987 system cost is recorded on the Isle-of-Dogs/Stratford phase to avoid double-counting.", "opened": "1987-08-31", "segment": { "fromStopIndex": 11, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "The initial system comprised two routes, from Tower Gateway and Stratford to Island Gardens ... serving 15 stations.", "tier": "tertiary", "title": "Docklands Light Railway — Wikipedia (initial network incl. Tower Gateway)", "url": "https://en.wikipedia.org/wiki/Docklands_Light_Railway" } ], "stationCount": 0 }, { "confidence": "high", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "GBP", "isEstimate": true, "value": 295000000, "year": 1991 }, "notes": "Sources conflict: DLR Wikipedia gives £295M for the Bank tunnel extension, while other sources cite ~£149M that appears to cover only the tunnel civils rather than the full works. Recorded as the £295M full-works figure but flagged isEstimate given the disagreement; see research.dlr.json.", "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "the system was expanded into the heart of the City of London to Bank through a tunnel, which opened in 1991 at a cost of £295 million.", "tier": "tertiary", "title": "Docklands Light Railway — Wikipedia (Bank tunnel £295M)", "url": "https://en.wikipedia.org/wiki/Docklands_Light_Railway" } ] }, "geometryRef": "london-DLR#4", "id": "london-dlr-1991-bank", "kind": "extension", "label": { "en": "Bank extension: Tower Gateway area → Bank (City tunnel)" }, "notes": "Tunnel into the City of London to a new underground Bank station, opened 29 Jul 1991. Drawn as the Shadwell→Bank tunnel branch.", "opened": "1991-07-29", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "29 July 1991 — The DLR opened at Bank station on this date.", "tier": "tertiary", "title": "Bank and Monument stations — Wikipedia (DLR opened 29 Jul 1991)", "url": "https://en.wikipedia.org/wiki/Bank_and_Monument_stations" }, { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "the system was expanded into the heart of the City of London to Bank through a tunnel, which opened in 1991 at a cost of £295 million.", "tier": "tertiary", "title": "Docklands Light Railway — Wikipedia (Bank tunnel)", "url": "https://en.wikipedia.org/wiki/Docklands_Light_Railway" } ], "stationCount": 1 }, { "confidence": "high", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "GBP", "isEstimate": false, "value": 280000000, "year": 1994 }, "notes": "£280M for the Poplar→Beckton branch (11 stations), opened March 1994 (Wikipedia). A lower ~£224M figure appears on some enthusiast sources (railuk); £280M is the better-sourced figure and is used here, with the alternative noted for transparency.", "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "A route from Poplar via Canning Town and the north side of the Royal Docks complex was chosen, and opened in March 1994 at a cost of £280 million.", "tier": "tertiary", "title": "Docklands Light Railway — Wikipedia (Beckton £280M)", "url": "https://en.wikipedia.org/wiki/Docklands_Light_Railway" } ] }, "geometryRef": "london-DLR#2", "id": "london-dlr-1994-beckton", "kind": "extension", "label": { "en": "Beckton extension: Poplar → Beckton" }, "notes": "New branch from Poplar via Canning Town and the north side of the Royal Docks to Beckton, opened 28 Mar 1994.", "opened": "1994-03-28", "segment": { "fromStopIndex": 0, "toStopIndex": 11 }, "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "The DLR branch from Poplar was opened on 28 March 1994.", "tier": "tertiary", "title": "Beckton DLR station — Wikipedia (branch opened 28 Mar 1994)", "url": "https://en.wikipedia.org/wiki/Beckton_DLR_station" }, { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "A route from Poplar via Canning Town and the north side of the Royal Docks complex was chosen, and opened in March 1994 at a cost of £280 million.", "tier": "tertiary", "title": "Docklands Light Railway — Wikipedia (Beckton branch)", "url": "https://en.wikipedia.org/wiki/Docklands_Light_Railway" } ], "stationCount": 11 }, { "confidence": "high", "constructionStart": "1996", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "GBP", "isEstimate": false, "value": 200000000, "year": 1999 }, "notes": "£200M PFI total (government contributed ~£50M); opened ahead of schedule and within budget. Resolves a source spread of £140M (initial estimate)/£200M/£220M to the £200M final figure.", "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "Construction began in 1996, with the extension opening ahead of schedule on 20 November 1999 ... with Government contributing around £50 million of the £200 million", "tier": "tertiary", "title": "Docklands Light Railway — Wikipedia (Lewisham £200M, 1996–1999)", "url": "https://en.wikipedia.org/wiki/Docklands_Light_Railway" }, { "accessedAt": "2026-07-14", "kind": "primary", "publisher": "Transport for London", "quote": "The £200m line ... opened two months ahead of schedule and within its budget.", "tier": "primary", "title": "DLR toasts 10 years of the Lewisham extension — TfL", "url": "https://tfl.gov.uk/info-for/media/press-releases/2009/november/dlr-toasts-10-years-of-the-lewisham-extension" } ] }, "geometryRef": "london-DLR", "id": "london-dlr-1999-lewisham", "kind": "extension", "label": { "en": "Lewisham extension: Island Gardens → Lewisham (Thames tunnel)" }, "notes": "Tunnel under the Thames from Island Gardens to Greenwich and on to Lewisham, opened 20 Nov 1999, two months ahead of schedule. Delivered as a PFI by consortium CGL Rail.", "opened": "1999-11-20", "segment": { "fromStopIndex": 0, "toStopIndex": 5 }, "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "the extension opening ahead of schedule on 20 November 1999", "tier": "tertiary", "title": "Docklands Light Railway — Wikipedia (Lewisham opened 20 Nov 1999)", "url": "https://en.wikipedia.org/wiki/Docklands_Light_Railway" } ], "stationCount": 5 }, { "confidence": "high", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "GBP", "isEstimate": false, "value": 142000000, "year": 2005 }, "notes": "£142M, built under a PFI concession (City Airport Rail Enterprises); four stations added.", "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "The extension initially opened as far as King George V in North Woolwich on 2nd December 2005.", "tier": "tertiary", "title": "London City Airport DLR station — Wikipedia (£142M PFI)", "url": "https://en.wikipedia.org/wiki/London_City_Airport_DLR_station" } ] }, "geometryRef": "london-DLR#3", "id": "london-dlr-2005-city-airport", "kind": "extension", "label": { "en": "London City Airport extension: Canning Town → King George V" }, "notes": "4.4 km branch from Canning Town serving London City Airport, opened as far as King George V on 2 Dec 2005. Built under a 30-year PFI concession.", "opened": "2005-12-02", "segment": { "fromStopIndex": 0, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "The extension initially opened as far as King George V in North Woolwich on 2nd December 2005.", "tier": "tertiary", "title": "London City Airport DLR station — Wikipedia (opened 2 Dec 2005)", "url": "https://en.wikipedia.org/wiki/London_City_Airport_DLR_station" }, { "accessedAt": "2026-07-14", "kind": "news", "publisher": "Railway Gazette International", "quote": "Services on the 4·4 km branch from Canning Town to King George V had already begun on December 2, adding four stations to the DLR network.", "tier": "secondary", "title": "DLR reaches City Airport — Railway Gazette International", "url": "https://www.railwaygazette.com/dlr-reaches-city-airport/25491.article" } ], "stationCount": 4 }, { "confidence": "high", "constructionStart": "2005", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "GBP", "isEstimate": false, "value": 180000000, "year": 2009 }, "notes": "£180M extension; delivered ahead of schedule and within budget.", "sources": [ { "accessedAt": "2026-07-14", "kind": "primary", "publisher": "Transport for London", "quote": "The Mayor of London, Boris Johnson, officially opened a £180m extension of the Docklands Light Railway (DLR) to Woolwich Arsenal.", "tier": "primary", "title": "Mayor unveils DLR Woolwich Arsenal station — TfL", "url": "https://tfl.gov.uk/info-for/media/press-releases/2009/january/mayor-unveils-dlr-woolwich-arsenal-station" } ] }, "geometryRef": "london-DLR#3", "id": "london-dlr-2009-woolwich", "kind": "extension", "label": { "en": "Woolwich Arsenal extension: King George V → Woolwich Arsenal (Thames tunnel)" }, "notes": "Tunnel under the Thames from King George V to a new Woolwich Arsenal station, public service 10 Jan 2009 (Mayoral ceremony 12 Jan). Physical works began June 2005; Thames tunnel completed 23 Jul 2007. NOTE: OSM does not include a Woolwich Arsenal DLR stop node, so this phase uses a coordinate-form segment to the spine terminus — the track draws but the Woolwich Arsenal dot is absent.", "opened": "2009-01-10", "segment": { "from": [ 0.06179, 51.50197 ], "to": [ 0.07, 51.48987 ] }, "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "The extension opened on 10 January 2009 ... Construction began in June 2005 ... The tunnels under the Thames were completed on 23 July 2007.", "tier": "tertiary", "title": "Woolwich Arsenal station — Wikipedia (opened 10 Jan 2009)", "url": "https://en.wikipedia.org/wiki/Woolwich_Arsenal_station" }, { "accessedAt": "2026-07-14", "kind": "primary", "publisher": "Transport for London", "quote": "officially opened a £180m extension of the Docklands Light Railway (DLR) to Woolwich Arsenal.", "tier": "primary", "title": "Mayor unveils DLR Woolwich Arsenal station — TfL", "url": "https://tfl.gov.uk/info-for/media/press-releases/2009/january/mayor-unveils-dlr-woolwich-arsenal-station" } ], "stationCount": 1 }, { "confidence": "high", "constructionStart": "2007", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "GBP", "isEstimate": false, "value": 211000000, "year": 2011 }, "notes": "£211M extension from Canning Town to Stratford International.", "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "The £211 million extension ran from Canning Town to Stratford International ... the line opened on 31 August 2011.", "tier": "tertiary", "title": "Stratford International station — Wikipedia (£211M, opened 31 Aug 2011)", "url": "https://en.wikipedia.org/wiki/Stratford_International_station" } ] }, "geometryRef": "london-DLR#3", "id": "london-dlr-2011-stratford-international", "kind": "extension", "label": { "en": "Stratford International extension: Canning Town → Stratford International" }, "notes": "Extension from Canning Town largely reusing the former North London Line alignment to Stratford International, opened 31 Aug 2011. Adds Star Lane, West Ham, Abbey Road, Stratford High Street and Stratford International (the existing Stratford DLR platforms are on the drawn segment but pre-date this phase).", "opened": "2011-08-31", "segment": { "fromStopIndex": 4, "toStopIndex": 10 }, "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "the line opened on 31 August 2011.", "tier": "tertiary", "title": "Stratford International station — Wikipedia (opened 31 Aug 2011)", "url": "https://en.wikipedia.org/wiki/Stratford_International_station" } ], "stationCount": 5 } ], "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "tier": "tertiary", "title": "Docklands Light Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Docklands_Light_Railway" }, { "accessedAt": "2026-07-14", "kind": "primary", "publisher": "Transport for London", "tier": "primary", "title": "Docklands Light Railway — Transport for London", "url": "https://tfl.gov.uk/modes/dlr/" } ] } ], "name": { "en": "London" } }, { "bbox": [ -74.05, 40.55, -73.7, 40.92 ], "center": [ -73.95, 40.72 ], "country": "United States", "defaultZoom": 10, "homeCurrency": "USD", "id": "nyc", "lines": [ { "cityId": "nyc", "color": "#EE352E", "displayNumber": "IRT Broadway–Seventh Avenue Line", "id": "nyc-line-irt-broadway-seventh-avenue-line", "name": { "en": "IRT Broadway–Seventh Avenue Line" }, "phases": [ { "confidence": "medium", "constructionStart": "1900", "geometryRef": "nyc-IRT Broadway–Seventh Avenue Line", "id": "nyc-irt-broadway-seventh-avenue-line-19041027-0", "kind": "initial", "label": { "en": "Original IRT subway opens: City Hall → 145th Street (West Side Branch, Contract 1)" }, "notes": "[Date chase 2026-06-12] Walker, Fifty Years of Rapid Transit (1918), archive.org: 'On March 24, 1900, ground was broken in front of the City Hall for the new subway' — primary-source corroboration of the 1900 construction start (Degnon-McLean Company first to begin work, March 24, 1900).", "opened": "1904-10-27", "segment": { "fromStopIndex": 11, "toStopIndex": 24 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123903/https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line", "kind": "wikipedia", "quote": "Operation of the first subway began on October 27, 1904, with the opening of all stations from City Hall to 145th Street on the West Side Branch.", "tier": "tertiary", "title": "IRT Broadway–Seventh Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427172840/https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway", "kind": "wikipedia", "quote": "$35 million would be provided for the total cost of the line ... The city government started construction on the first IRT subway in 1900 ... A formal groundbreaking ceremony was done City Hall on March 24.", "tier": "tertiary", "title": "Early history of the IRT subway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway" }, { "accessedAt": "2026-06-12", "kind": "primary", "publisher": "Law Printing Company", "quote": "On March 24, 1900, ground was broken in front of the City Hall for the new subway, although actual construction lagged for several months while the Rapid Transit Commission was recruiting its engineering staff and the contractor was planning his work. … The Degnon-McLean Company, which had the two contracts extending from City Hall to Great Jones and Centre streets, was the first to begin work, which was started on March 24, 1900.", "tier": "primary", "title": "Fifty Years of Rapid Transit, 1864–1917 — James Blaine Walker (1918)", "url": "https://archive.org/details/fiftyyearsrapid01walkgoog", "via": "https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway" } ] }, { "confidence": "low", "geometryRef": "nyc-IRT Broadway–Seventh Avenue Line", "id": "nyc-irt-broadway-seventh-avenue-line-19041112-1", "kind": "extension", "label": { "en": "Extension: 145th Street → 157th Street" }, "notes": "Service ran to 157th St for a football game on 12 Nov 1904 before the station fully opened; the 157th Street station officially opened 4 December 1904. Using the 12 Nov initial-service date. [Opening-date chase 2026-06-13] Partial-then-full: 157th Street saw special-event/partial service Nov 12, 1904 (football game) before full station opening; one source dates the official station opening to Dec 4, 1904. Curated Nov 12 reflects start of service to the terminus.", "opened": "1904-11-12", "segment": { "fromStopIndex": 10, "toStopIndex": 11 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427172840/https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway", "kind": "wikipedia", "quote": "Service was extended to 157th Street for a football game on November 12, 1904, before the station had fully opened. The 157th Street station officially opened on December 4.", "tier": "tertiary", "title": "Early history of the IRT subway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "nyc-IRT Broadway–Seventh Avenue Line", "id": "nyc-irt-broadway-seventh-avenue-line-19060312-2", "kind": "extension", "label": { "en": "Extension: 157th Street → 221st Street (temporary terminus)" }, "notes": "Operated as a shuttle between 157th and 221st Streets; initially only Dyckman Street, 215th Street and 221st Street stations opened on this date, with intermediate stations (168th St 14 Apr 1906, 181st St 30 May 1906, 191st St 1911) following later.", "opened": "1906-03-12", "segment": { "fromStopIndex": 3, "toStopIndex": 10 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427172840/https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway", "kind": "wikipedia", "quote": "The West Side Branch was extended northward to a temporary terminus of 221st Street and Broadway on March 12, 1906.", "tier": "tertiary", "title": "Early history of the IRT subway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway" } ] }, { "confidence": "low", "geometryRef": "nyc-IRT Broadway–Seventh Avenue Line", "id": "nyc-irt-broadway-seventh-avenue-line-19070127-3", "kind": "extension", "label": { "en": "Extension: 221st Street → 230th Street (temporary terminus, via Broadway Bridge over Harlem Ship Canal)" }, "notes": "Trains crossed the Harlem Ship Canal via the Broadway Bridge from 14 Jan 1907 to 225th Street; the 221st Street station closed. Service reached the temporary 230th Street terminus on 27 Jan 1907.", "opened": "1907-01-27", "segment": { "fromStopIndex": 2, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427172840/https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway", "kind": "wikipedia", "quote": "Service was extended to the temporary terminus at 230th Street on January 27, 1907.", "tier": "tertiary", "title": "Early history of the IRT subway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway" } ] }, { "confidence": "medium", "geometryRef": "nyc-IRT Broadway–Seventh Avenue Line", "id": "nyc-irt-broadway-seventh-avenue-line-19080801-4", "kind": "extension", "label": { "en": "Extension: 230th Street → 242nd Street–Van Cortlandt Park (final Contract 1 northern terminus)" }, "notes": "Completed the West Side Branch northern extension to its permanent terminus at 242nd Street/Van Cortlandt Park.", "opened": "1908-08-01", "segment": { "fromStopIndex": 0, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427172840/https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway", "kind": "wikipedia", "quote": "This extension opened on August 1, 1908.", "tier": "tertiary", "title": "Early history of the IRT subway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251031060317/https://www.nytimes.com/1908/08/02/archives/our-first-subway-completed-at-last-opening-of-the-van-cortlandt.html", "kind": "news", "publisher": "The New York Times", "quote": "[Dateline August 2, 1908, reporting on the opening of the Van Cortlandt extension the previous day — paywalled but title confirms August 1 opening]", "tier": "secondary", "title": "Our First Subway Completed At Last — Opening of the Van Cortlandt Extension Finishes System Begun in 1900", "url": "https://www.nytimes.com/1908/08/02/archives/our-first-subway-completed-at-last-opening-of-the-van-cortlandt.html", "via": "https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway" } ] }, { "confidence": "low", "cost": { "basis": "estimate", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": true, "value": 14793419, "year": 1917 }, "notes": "Estimated cost ($14,793,419) for the ENTIRE Seventh Avenue extension south of Times Square (eight sections), not the 1917 shuttle stub alone; this segment opened in stages 1917–1918. Equivalent to ~$437.7M in 2025 per Wikipedia. [Citation chase 2026-06-11] Figure is a contemporary estimate sourced to Engineering News-record, Vol. 75 (1916); the underlying primary source (Google Books) is paywalled and the IRT 1916–1917 annual report (HathiTrust) is access-blocked, so the value rests on Wikipedia's secondary citation alone. Note the dollar vintage is 1916 (estimate year), not 1917.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123903/https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line", "kind": "wikipedia", "quote": "On June 3, 1917, the first portion of the Broadway–Seventh Avenue Line south of Times Square–42nd Street, a shuttle to 34th Street–Penn Station, opened; a separate shuttle service, running between 42nd and 34th Streets, was created.", "tier": "tertiary", "title": "IRT Broadway–Seventh Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123903/https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line", "kind": "wikipedia", "quote": "The entire line, consisting of eight sections, was expected to cost $14,793,419 (equivalent to $437,695,195 in 2025).", "tier": "tertiary", "title": "IRT Broadway–Seventh Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line" } ] }, "geometryRef": "nyc-IRT Broadway–Seventh Avenue Line", "id": "nyc-irt-broadway-seventh-avenue-line-19170603-5", "kind": "extension", "label": { "en": "Seventh Avenue subway opens south of Times Square: Times Square–42nd St → 34th St–Penn Station (shuttle, Dual Contracts)" }, "notes": "[Opening-date chase 2026-06-13] Opened as a shuttle (42nd–34th St) with only the northern part of the 34th St platform in service; June 3, 1917 is the revenue-service date.", "opened": "1917-06-03", "segment": { "fromStopIndex": 24, "toStopIndex": 25 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123903/https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line", "kind": "wikipedia", "quote": "On June 3, 1917, the first portion of the Broadway–Seventh Avenue Line south of Times Square–42nd Street, a shuttle to 34th Street–Penn Station, opened; a separate shuttle service, running between 42nd and 34th Streets, was created.", "tier": "tertiary", "title": "IRT Broadway–Seventh Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123903/https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line", "kind": "wikipedia", "quote": "The entire line, consisting of eight sections, was expected to cost $14,793,419 (equivalent to $437,695,195 in 2025).", "tier": "tertiary", "title": "IRT Broadway–Seventh Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "nyc-IRT Broadway–Seventh Avenue Line", "id": "nyc-irt-broadway-seventh-avenue-line-19180701-6", "kind": "extension", "label": { "en": "Extension: 34th St–Penn Station → South Ferry, with Brooklyn branch shuttle (Chambers St – Wall St)" }, "notes": "The Times Square shuttle was extended south to South Ferry, and a shorter shuttle began on the Brooklyn branch between Chambers Street and Wall Street. Announced by the Public Service Commission on 27 June 1918.", "opened": "1918-07-01", "segment": { "fromStopIndex": 25, "toStopIndex": 37 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123903/https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line", "kind": "wikipedia", "quote": "On June 27, 1918, the Public Service Commission (PSC) announced that on July 1, the shuttle would be extended south to South Ferry, with a shorter shuttle on the Brooklyn branch between Chambers Street and Wall Street, on July 1, 1918.", "tier": "tertiary", "title": "IRT Broadway–Seventh Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line" } ] }, { "confidence": "low", "geometryRef": null, "id": "nyc-irt-broadway-seventh-avenue-line-19180801-7", "kind": "renumber", "label": { "en": "\"H\" system implemented: two halves of the Broadway–Seventh Avenue Line joined at Times Square" }, "notes": "Reconfiguration (not a new track segment) joining the northern West Side Branch and the southern Seventh Avenue line through Times Square, routing all West Side trains south; effectively doubled IRT capacity. Recorded as a service/route reorganization phase.", "opened": "1918-08-01", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123903/https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line", "kind": "wikipedia", "quote": "The new 'H' system was implemented on August 1, 1918, joining the two halves of the Broadway–Seventh Avenue Line and sending all West Side trains south from Times Square.", "tier": "tertiary", "title": "IRT Broadway–Seventh Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line" } ] }, { "confidence": "medium", "constructionStart": "1914", "cost": { "basis": "budget", "confidence": "high", "nominal": { "currency": "USD", "isEstimate": false, "value": 6470000, "year": 1914 }, "notes": "$6.47M contract awarded July 1914 to Booth & Flinn Ltd. and O'Rourke Engineering Construction Company for the Clark Street Tunnel between Old Slip (Manhattan) and Clark Street (Brooklyn); construction began 12 October 1914. [Citation chase 2026-06-11] The exact contract figure was $6,469,916.25 (NYT, July 17, 1914), representing a nominal 1914-dollar contract award rather than a final out-turn cost; a separate $5,974,809.50 BRT East River tunnel contract (Whitehall St to Montague St) was awarded to the same contractors in the same article and should not be conflated with this figure.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123903/https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line", "kind": "wikipedia", "quote": "The local tracks ran to South Ferry, while the express tracks used the Brooklyn branch to Wall Street, extended to Atlantic Avenue in Brooklyn via the Clark Street Tunnel on April 15, 1919.", "tier": "tertiary", "title": "IRT Broadway–Seventh Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123903/https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line", "kind": "wikipedia", "quote": "Booth & Flinn Ltd. and the O'Rourke Engineering Construction Company received a $6.47 million contract in July 1914 to build a tunnel between Old Slip in Manhattan and Clark Street in Brooklyn. Construction of the tunnel began on October 12, 1914", "tier": "tertiary", "title": "IRT Broadway–Seventh Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20251102113918/https://www.nytimes.com/1914/07/17/archives/21000000-for-subways-contracts-signed-for-east-river-tunnels-and.html", "kind": "news", "publisher": "The New York Times", "quote": "Interborough East River tunnel from Old Slip to Clark Street, Brooklyn, to the same two contractors, $6,469,916.25.", "tier": "primary", "title": "$21,000,000 for Subways; Contracts Signed for East River Tunnels and Other Work.", "url": "https://www.nytimes.com/1914/07/17/archives/21000000-for-subways-contracts-signed-for-east-river-tunnels-and.html", "via": "https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line" } ] }, "geometryRef": null, "id": "nyc-irt-broadway-seventh-avenue-line-19190415-8", "kind": "extension", "label": { "en": "Clark Street Tunnel opens: Wall Street → Atlantic Avenue, Brooklyn (express tracks under East River)" }, "notes": "[Date chase 2026-06-12] Clark Street Tunnel construction began Oct 12, 1914 (NYT 'Work Begins on New Tubes Under River,' Oct 11, 1914); the $6.47M Booth & Flinn / O'Rourke contract was signed July 1914 (NYT 'Contracts Signed for East River Tunnels,' July 17, 1914). Both NYT sources are paywalled but corroborate the 1914 start.", "opened": "1919-04-15", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123903/https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line", "kind": "wikipedia", "quote": "The local tracks ran to South Ferry, while the express tracks used the Brooklyn branch to Wall Street, extended to Atlantic Avenue in Brooklyn via the Clark Street Tunnel on April 15, 1919.", "tier": "tertiary", "title": "IRT Broadway–Seventh Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123903/https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line", "kind": "wikipedia", "quote": "Booth & Flinn Ltd. and the O'Rourke Engineering Construction Company received a $6.47 million contract in July 1914 to build a tunnel between Old Slip in Manhattan and Clark Street in Brooklyn. Construction of the tunnel began on October 12, 1914", "tier": "tertiary", "title": "IRT Broadway–Seventh Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20251006002111/https://www.nytimes.com/1914/10/11/archives/work-begins-on-new-tubes-under-river-engineer-tells-how-subway.html", "kind": "news", "publisher": "The New York Times", "quote": "Work Begins on New Tubes Under River — Engineer Tells How Subway Tunnels Will Be Cut Through to Brooklyn — Will Burrow in Shield — Steel Ring Pushed Forward Under Hydraulic Pressure of 6,000,000 Pounds [article dated October 11, 1914; Wikipedia states construction began October 12, 1914 citing this article]", "tier": "primary", "title": "Work Begins on New Tubes Under River — Engineer Tells How Subway Tunnels Will Be Cut Through to Brooklyn", "url": "https://www.nytimes.com/1914/10/11/archives/work-begins-on-new-tubes-under-river-engineer-tells-how-subway.html", "via": "https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20251102113918/https://www.nytimes.com/1914/07/17/archives/21000000-for-subways-contracts-signed-for-east-river-tunnels-and.html", "kind": "news", "publisher": "The New York Times", "quote": "[Title confirms contracts signed July 1914; full article text paywalled but title corroborates the Wikipedia statement that Booth & Flinn received a $6.47 million contract in July 1914]", "tier": "primary", "title": "$21,000,000 for Subways; Contracts Signed for East River Tunnels and Other Work", "url": "https://www.nytimes.com/1914/07/17/archives/21000000-for-subways-contracts-signed-for-east-river-tunnels-and.html", "via": "https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line" } ] }, { "confidence": "medium", "geometryRef": null, "id": "nyc-irt-broadway-seventh-avenue-line-20090316-9", "kind": "extension", "label": { "en": "New South Ferry terminal station opens (replaces original balloon-loop terminal)" }, "notes": "New two-track South Ferry terminal replaced the original five-car balloon-loop station. (The new station was flooded by Hurricane Sandy in Oct 2012 and the original loop was temporarily reactivated; the rebuilt new station reopened in 2017.)", "opened": "2009-03-16", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123903/https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line", "kind": "wikipedia", "quote": "On March 16, 2009, the new South Ferry station opened", "tier": "tertiary", "title": "IRT Broadway–Seventh Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20230321060108/https://www.mta.info/press-release/mta-headquarters/mta-opens-new-south-ferry-subway-terminal", "kind": "primary", "publisher": "Metropolitan Transportation Authority", "quote": "[MTA press release dated March 16, 2009, archived at https://web.archive.org/web/20151223111621/http://www.mta.info/press-release/mta-headquarters/mta-opens-new-south-ferry-subway-terminal — live URL is dead; WebFetch of archive copy was blocked]", "tier": "primary", "title": "MTA Opens New South Ferry Subway Terminal", "url": "http://www.mta.info/press-release/mta-headquarters/mta-opens-new-south-ferry-subway-terminal", "via": "https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611123903/https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line", "kind": "wikipedia", "quote": "Operation of the first subway began on October 27, 1904, with the opening of all stations from City Hall to 145th Street on the West Side Branch.", "tier": "tertiary", "title": "IRT Broadway–Seventh Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Broadway%E2%80%93Seventh_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427172840/https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway", "kind": "wikipedia", "quote": "$35 million would be provided for the total cost of the line ... The city government started construction on the first IRT subway in 1900 ... A formal groundbreaking ceremony was done City Hall on March 24.", "tier": "tertiary", "title": "Early history of the IRT subway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway" } ] }, { "cityId": "nyc", "color": "#00933C", "displayNumber": "IRT Lexington Avenue Line", "id": "nyc-line-irt-lexington-avenue-line", "name": { "en": "IRT Lexington Avenue Line" }, "phases": [ { "confidence": "high", "constructionStart": "1900", "cost": { "basis": "budget", "confidence": "high", "nominal": { "currency": "USD", "isEstimate": false, "value": 35000000, "year": 1900 }, "notes": "Contract figure for the ENTIRE original IRT subway (the H/main line including the West Side and Lenox/Broadway branches), NOT this segment alone. Brooklyn Bridge–City Hall, Worth St (closed), Spring St, Bleecker St, Astor Place, 14th St–Union Sq, 18th St (closed), 23rd St, 28th St, 33rd St, Grand Central–42nd St opened this date; ~8 of these survive on the present Lexington line south of 42nd St. [Citation chase 2026-06-11] The $35,000,000 is the fixed lump-sum price of Contract 1 (awarded Feb 21, 1900), confirmed by the Board of Rapid Transit Railroad Commissioners 1904 annual report (primary) and Walker, Fifty Years of Rapid Transit, 1918 (McDonald's $35M bid vs Onderdonk's $39.3M). Equipment — rolling stock, signals, and power plant — was furnished separately by the contractor at its own expense and was not included in this $35M.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260116100433/https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line", "kind": "wikipedia", "quote": "The part of the line from City Hall to just south of 42nd Street was part of the original IRT line, opened on October 27, 1904.", "tier": "tertiary", "title": "IRT Lexington Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427172840/https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway", "kind": "wikipedia", "quote": "$35 million would be provided for the total cost of the line, and the Rapid Transit Construction Company would provide the cost of necessary equipment, including signals, rolling stock, and power plants.", "tier": "tertiary", "title": "Early history of the IRT subway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway" }, { "accessedAt": "2026-06-11", "kind": "other", "publisher": "Law Printing, New York, N.Y.", "quote": "Mr. McDonald offered to build the whole road for $35,000,000; Onderdonk for $39,300,000. ... While the city agreed to pay McDonald $35,000,000 for the work, it was obligated also to purchase the real estate required for terminals and stations.", "tier": "secondary", "title": "Fifty Years of Rapid Transit — 1864 to 1917", "url": "https://archive.org/details/fiftyyearsrapid00walkgoog", "via": "https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway" }, { "accessedAt": "2026-06-11", "kind": "primary", "publisher": "Board of Rapid Transit Railroad Commissioners", "quote": "The price was a fixed lump sum of $35,000,000, to cover the total cost of the railway complete, ready for operation. In addition to this lump sum, interest during construction was to be funded, and added to the contract price, to give the total amount on which the lessee company is to pay interest as rental.", "tier": "primary", "title": "Report of the Board of Rapid Transit Railroad Commissioners for the City of New York For The Year Ending December 31, 1904 Accompanied By Reports of the Chief Engineer and of the Auditor", "url": "https://archive.org/details/cu31924022794253/page/n253/mode/2up", "via": "https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway" } ] }, "geometryRef": "nyc-IRT Lexington Avenue Line", "id": "nyc-irt-lexington-avenue-line-19041027-0", "kind": "initial", "label": { "en": "Original IRT opens: City Hall → south of 42nd Street (east-side trunk later forming the Lexington Avenue Line south leg)" }, "notes": "[Date chase 2026-06-12] Construction on the original IRT (Contract 1) began in 1900: contract executed February 21, 1900; formal groundbreaking at City Hall and start of Section 1 work both March 24, 1900; confirmed by a March 25, 1900 NYT report of the official groundbreaking. The NYT timesmachine primary source is paywalled and the 1904 Board of Rapid Transit Railroad Commissioners report rendered catalog-only, but both corroborate 1900 via their cited titles/metadata. [Opening-date chase 2026-06-13] Mayor McClellan ran the first official train Oct 27, 1904, but ~150,000 of the public also rode that same day (NYT, Oct 28, 1904) — ceremonial and revenue/public opening were the same date.", "opened": "1904-10-27", "segment": { "fromStopIndex": 10, "toStopIndex": 19 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260116100433/https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line", "kind": "wikipedia", "quote": "The part of the line from City Hall to just south of 42nd Street was part of the original IRT line, opened on October 27, 1904.", "tier": "tertiary", "title": "IRT Lexington Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427172840/https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway", "kind": "wikipedia", "quote": "$35 million would be provided for the total cost of the line, and the Rapid Transit Construction Company would provide the cost of necessary equipment, including signals, rolling stock, and power plants.", "tier": "tertiary", "title": "Early history of the IRT subway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20221027030208/https://timesmachine.nytimes.com/timesmachine/1900/03/25/102581493.pdf", "kind": "news", "publisher": "The New York Times", "quote": "Rapid Transit Tunnel Begun — Ground Officially Broken by the Mayor with a Silver Spade (dated March 25, 1900)", "tier": "primary", "title": "Rapid Transit Tunnel Begun — Ground Officially Broken by the Mayor with a Silver Spade — Felicitations and Speeches — Ceremonies Witnessed by Immense Unruly Crowd Eager for Souvenirs.", "url": "https://timesmachine.nytimes.com/timesmachine/1900/03/25/102581493.pdf", "via": "https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line" }, { "accessedAt": "2026-06-12", "kind": "primary", "publisher": "Board of Rapid Transit Railroad Commissioners", "quote": "Contract 1 executed February 21, 1900; groundbreaking March 24, 1900 (as cited via Wikipedia's Early history of the IRT subway article; full text not directly verified due to catalog-only page rendering at archive.org)", "tier": "primary", "title": "Report of the Board of Rapid Transit Railroad Commissioners for the City of New York For The Year Ending December 31, 1904", "url": "https://archive.org/details/cu31924022794253/page/n253/mode/2up", "via": "https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20180202102236/https://query.nytimes.com/gst/abstract.html?res=9E06EFD71230EE32A2575BC2A9669D946597D6CF&legacy=true", "kind": "news", "publisher": "The New York Times", "quote": "Our Subway Open, 150,000 Try It — Mayor McClellan Runs the First Official Train — Big Crowds Ride At Night — Average of 25,000 an Hour from 7 P.M. Till Past Midnight (dated October 28, 1904, reporting on October 27, 1904 opening)", "tier": "secondary", "title": "Our Subway Open, 150,000 Try It — Mayor McClellan Runs the First Official Train — Big Crowds Ride At Night — Average of 25,000 an Hour from 7 P.M. Till Past Midnight — Exercises in the City Hall", "url": "https://query.nytimes.com/gst/abstract.html?res=9E06EFD71230EE32A2575BC2A9669D946597D6CF&legacy=true", "via": "https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line" } ], "stationCount": 8 }, { "confidence": "medium", "geometryRef": null, "id": "nyc-irt-lexington-avenue-line-19050116-1", "kind": "extension", "label": { "en": "Southern extension: Brooklyn Bridge → Fulton Street" }, "notes": "[Opening-date chase 2026-06-13] Partial opening: only the northbound platform at Fulton Street opened Jan 16, 1905; the southbound platform followed on June 12, 1905.", "opened": "1905-01-16", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260116100433/https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line", "kind": "wikipedia", "quote": "A 0.3 miles (0.48 km) extension to Fulton Street opened at 12:01 a.m. on January 16, 1905.", "tier": "tertiary", "title": "IRT Lexington Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20221027030224/https://timesmachine.nytimes.com/timesmachine/1905/01/14/101318642.pdf", "kind": "news", "publisher": "The New York Times", "quote": "Fulton St. Trains Monday (article dated January 14, 1905, previewing the Monday January 16, 1905 opening)", "tier": "secondary", "title": "Fulton St. Trains Monday — New Style of Subway Platform Will Be Tried There", "url": "https://timesmachine.nytimes.com/timesmachine/1905/01/14/101318642.pdf", "via": "https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": null, "id": "nyc-irt-lexington-avenue-line-19050612-2", "kind": "extension", "label": { "en": "Southern extension: Fulton Street → Wall Street" }, "notes": "[Opening-date chase 2026-06-13] June 12, 1905 opened Wall Street station plus the previously-missing southbound platform at Fulton Street.", "opened": "1905-06-12", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260116100433/https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line", "kind": "wikipedia", "quote": "The next station, Wall Street, was opened on June 12, 1905, as well as the southbound platform at Fulton Street.", "tier": "tertiary", "title": "IRT Lexington Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20241212160150/https://www.nytimes.com/1905/06/13/archives/subway-trains-run-again-this-morning-through-service-promised-for.html", "kind": "news", "publisher": "The New York Times", "quote": "Subway Trains Run Again This Morning (article dated June 13, 1905, covering Wall Street station opening on June 12, 1905)", "tier": "secondary", "title": "Subway Trains Run Again This Morning — Through Service Promised for the Rush-Hour Crowds — Tunnel Pumped Out At Last", "url": "https://www.nytimes.com/1905/06/13/archives/subway-trains-run-again-this-morning-through-service-promised-for.html", "via": "https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": null, "id": "nyc-irt-lexington-avenue-line-19050710-3", "kind": "extension", "label": { "en": "Southern extension: Wall Street → Bowling Green / South Ferry" }, "notes": "Date conflict: the Lexington Avenue Line article states the first revenue train left South Ferry at 11:59 p.m. on July 9, 1905; the Early-history IRT article and Bowling Green station article give July 10, 1905. Both reflect the same late-night opening; using the widely-cited July 10 1905 date. Added Bowling Green and the South Ferry loop terminal. [Opening-date chase 2026-06-13] First revenue train left South Ferry at 11:59 p.m. on July 9, but service formally opened at midnight; NYT (July 10, 1905) confirms 'Open at Midnight' — curated July 10, 1905 is correct.", "opened": "1905-07-10", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427172840/https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway", "kind": "wikipedia", "quote": "and to Bowling Green and South Ferry on July 10, 1905", "tier": "tertiary", "title": "Early history of the IRT subway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260116100433/https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line", "kind": "wikipedia", "quote": "The first revenue train on the South Ferry extension left South Ferry at 11:59 p.m. on July 9, 1905.", "tier": "tertiary", "title": "IRT Lexington Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20231011191921/https://www.nytimes.com/1905/07/10/archives/subway-trains-running-from-bronx-to-battery-west-farms-and-south.html", "kind": "news", "publisher": "The New York Times", "quote": "West Farms and South Ferry Stations Open at Midnight — Start Without a Hitch — Bowling Green Station Also Opened (article dated July 10, 1905)", "tier": "secondary", "title": "Subway Trains Running From Bronx to Battery — West Farms and South Ferry Stations Open at Midnight — Start Without a Hitch — Bowling Green Station Also Opened — Lenox Avenue Locals Take City Hall Loop Hereafter", "url": "https://www.nytimes.com/1905/07/10/archives/subway-trains-running-from-bronx-to-battery-west-farms-and-south.html", "via": "https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway" } ], "stationCount": 2 }, { "confidence": "medium", "geometryRef": null, "id": "nyc-irt-lexington-avenue-line-19080109-4", "kind": "extension", "label": { "en": "Joralemon Street Tunnel extension: Bowling Green → Borough Hall (Brooklyn)" }, "notes": "First underwater subway tunnel connecting Manhattan and Brooklyn. Borough Hall and the Brooklyn segment beyond are today operated as part of the IRT Eastern Parkway Line, but were the original IRT's first Brooklyn extension off this east-side trunk. [Opening-date chase 2026-06-13] Joralemon Street Tunnel (first underwater Manhattan-Brooklyn subway tunnel) carried its first regular passenger train ~12:45 a.m. Jan 9, 1908 — revenue service, with the formal Gov. Hughes celebration following later that day.", "opened": "1908-01-09", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427172840/https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway", "kind": "wikipedia", "quote": "the Joralemon Street Tunnel, which was the first underwater subway tunnel connecting Manhattan and Brooklyn, and it opened on January 9, 1908, extending the subway from Bowling Green to Borough Hall.", "tier": "tertiary", "title": "Early history of the IRT subway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260116100433/https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line", "kind": "wikipedia", "quote": "The first train ran through the Joralemon Street Tunnel to Brooklyn about 12:45 a.m. on January 9, 1908.", "tier": "tertiary", "title": "IRT Lexington Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20230519161407/https://www.nytimes.com/1908/01/09/archives/subway-to-brooklyn-opened-for-traffic-first-regular-passenger-train.html", "kind": "news", "publisher": "The New York Times", "quote": "Subway to Brooklyn Opened for Traffic — First Regular Passenger Train Went Under the East River Early This Morning (article dated January 9, 1908; first train at about 12:45 a.m.)", "tier": "secondary", "title": "Subway to Brooklyn Opened for Traffic — First Regular Passenger Train Went Under the East River Early This Morning — Not a Hitch in the Service — Gov. Hughes and Brooklyn Officials to Join in a Formal Celebration of Event To-day", "url": "https://www.nytimes.com/1908/01/09/archives/subway-to-brooklyn-opened-for-traffic-first-regular-passenger-train.html", "via": "https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway" } ], "stationCount": 1 }, { "confidence": "high", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": false, "value": 58000000, "year": 1918 }, "notes": "Cost of the Lexington Avenue extension north from Grand Central, built under the Dual Contracts. Eleven new stations: 51st St, 59th St, 68th St–Hunter College, 77th St, 86th St, 96th St, 103rd St, 110th St, 116th St, 125th St (express), plus the new diagonal Grand Central express station. [Citation chase 2026-06-11] Figure rests on a single secondary source (Wikipedia); its underlying citation, the NYT July 11, 1918 article (p.20), is paywalled and the accessible excerpt confirms the line's opening/scope but does not itself surface the $58M figure, so the number is uncorroborated by an independent or primary source.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260116100433/https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line", "kind": "wikipedia", "quote": "The cost of the extension from Grand Central was $58 million.", "tier": "tertiary", "title": "IRT Lexington Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260116100433/https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line", "kind": "wikipedia", "quote": "The segment north of Grand Central opened on July 17, 1918, adding eleven new stations in Manhattan: 51st Street, 59th Street, 68th Street–Hunter College, 77th Street, 86th Street, 96th Street, 103rd Street, 110th Street–Central Park North, 116th Street, and 125th Street.", "tier": "tertiary", "title": "IRT Lexington Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line" } ] }, "geometryRef": "nyc-IRT Lexington Avenue Line", "id": "nyc-irt-lexington-avenue-line-19180717-5", "kind": "extension", "label": { "en": "Dual Contracts northern extension opens: Grand Central–42nd Street → 125th Street (the Lexington Avenue Line proper)" }, "notes": "Opened July 17, 1918 but ran only as a shuttle on the local tracks (42nd St to 167th St on the Jerome Ave Line) until the evening of August 1, 1918, when the 'H system' reorganization made the Lexington Avenue Line a through route and split off the 42nd Street Shuttle. North of 125th St the line crosses the Harlem River into the Bronx, splitting into the IRT Jerome Avenue Line and IRT Pelham Line. [Opening-date chase 2026-06-13] July 17, 1918 was a genuine revenue opening of the Grand Central-to-125th Street segment, but it initially ran as a local-track shuttle (terminating at 42nd St and at 167th St on the Jerome Avenue Line) until the H-system through-routing on Aug 1, 1918.", "opened": "1918-07-17", "segment": { "fromStopIndex": 0, "toStopIndex": 10 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260116100433/https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line", "kind": "wikipedia", "quote": "The cost of the extension from Grand Central was $58 million.", "tier": "tertiary", "title": "IRT Lexington Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260116100433/https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line", "kind": "wikipedia", "quote": "The segment north of Grand Central opened on July 17, 1918, adding eleven new stations in Manhattan: 51st Street, 59th Street, 68th Street–Hunter College, 77th Street, 86th Street, 96th Street, 103rd Street, 110th Street–Central Park North, 116th Street, and 125th Street.", "tier": "tertiary", "title": "IRT Lexington Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20211227184649/https://timesmachine.nytimes.com/timesmachine/1918/07/17/102723156.pdf", "kind": "news", "publisher": "The New York Times", "quote": "Lexington Av. Line to be Opened Today — Subway Service to East Side of Harlem and the Bronx Expected to Relieve Congestion — Begins With Local Trains (article dated July 17, 1918)", "tier": "secondary", "title": "Lexington Av. Line to be Opened Today — Subway Service to East Side of Harlem and the Bronx Expected to Relieve Congestion — Begins With Local Trains — Running of Express Trains to Await Opening of Seventh Avenue Line of H System", "url": "https://timesmachine.nytimes.com/timesmachine/1918/07/17/102723156.pdf", "via": "https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20170813190643/http://query.nytimes.com/gst/abstract.html?res=9802EFDC143EE433A2575BC1A9619C946996D6CF&legacy=true", "kind": "news", "publisher": "The New York Times", "quote": "Mayor Runs First Lexington Av Train — Goes Back to His Old Job on the Initial Trip from 42d Street to the Bronx (article dated July 18, 1918, reporting on July 17, 1918 opening)", "tier": "secondary", "title": "Mayor Runs First Lexington Av Train — Goes Back to His Old Job on the Initial Trip from 42d Street to the Bronx — Interboro Ready to Pool", "url": "https://query.nytimes.com/gst/abstract.html?res=9802EFDC143EE433A2575BC1A9619C946996D6CF&legacy=true", "via": "https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line" } ], "stationCount": 11 }, { "confidence": "medium", "geometryRef": null, "id": "nyc-irt-lexington-avenue-line-19180801-6", "kind": "renumber", "label": { "en": "'H system' reorganization: Lexington Avenue Line becomes a through route (42nd Street Shuttle split off)" }, "notes": "On August 1, 1918 service patterns were changed: the Lexington Avenue Line (and the Broadway–Seventh Avenue Line) switched from shuttle operation to through service, the 42nd Street Shuttle was formed, and the system took on its 'H' shape. This created the Lexington Avenue Line as a distinct service rather than adding new track/stations. [Opening-date chase 2026-06-13] Aug 1, 1918 is a service-pattern reorganization (the 'H system'), not a new-segment opening: the Lexington Avenue Line became a through route and the 42nd Street Shuttle was split off. NYT (Aug 2, 1918) confirms the date.", "opened": "1918-08-01", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260116100433/https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line", "kind": "wikipedia", "quote": "On August 1, service patterns were changed, and the Lexington Avenue Line became a through route...the IRT 42nd Street Shuttle was formed...Due to the shape of the system, it was referred to as the 'H system'.", "tier": "tertiary", "title": "IRT Lexington Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260116100433/https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line", "kind": "wikipedia", "quote": "until the evening of August 1, 1918, it ran as a shuttle on the local tracks only, terminating at 42nd Street and at 167th Street on the IRT Jerome Avenue Line.", "tier": "tertiary", "title": "IRT Lexington Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251030114821/https://timesmachine.nytimes.com/timesmachine/1918/08/02/97011929.pdf", "kind": "news", "publisher": "The New York Times", "quote": "Open New Subway Lines to Traffic; Called a Triumph — Great H System Put in Operation Marks an Era in Railroad Construction (article dated August 2, 1918, reporting on August 1, 1918 reorganization)", "tier": "secondary", "title": "Open New Subway Lines to Traffic; Called a Triumph — Great H System Put in Operation Marks an Era in Railroad Construction — No Hitch in the Plans — But Public Gropes Blindly to Find the Way in Maze of New Stations", "url": "https://timesmachine.nytimes.com/timesmachine/1918/08/02/97011929.pdf", "via": "https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260116100433/https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line", "kind": "wikipedia", "quote": "The part of the line from City Hall to just south of 42nd Street was part of the original IRT line, opened on October 27, 1904.", "tier": "tertiary", "title": "IRT Lexington Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Lexington_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427172840/https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway", "kind": "wikipedia", "quote": "$35 million would be provided for the total cost of the line, and the Rapid Transit Construction Company would provide the cost of necessary equipment, including signals, rolling stock, and power plants.", "tier": "tertiary", "title": "Early history of the IRT subway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway" } ] }, { "cityId": "nyc", "color": "#B933AD", "displayNumber": "IRT Flushing Line", "id": "nyc-line-irt-flushing-line", "name": { "en": "IRT Flushing Line" }, "phases": [ { "confidence": "high", "constructionStart": "1892", "geometryRef": "nyc-IRT Flushing Line", "id": "nyc-irt-flushing-line-19150622-0", "kind": "initial", "label": { "en": "Steinway Tunnel opens for subway service: Grand Central → Vernon–Jackson Avenues" }, "notes": "Steinway Tunnel construction commenced 3 June 1892, halted 1893, resumed 1905. The City purchased the tunnels from Belmont on 3 April 1913 under the Dual Contracts for $3 million and placed them under IRT operation. First test trip by IRT cars 13 June 1915; passenger service began 22 June 1915. [Date chase 2026-06-12] Construction of the Steinway Tunnel began June 3, 1892, but was halted in 1893 and resumed in 1905; active subway construction effectively ran 1905-1915. The DB's 1892 constructionStart records the original commencement, consistent with Wikipedia and Hood 2004 (p. 164). [Opening-date chase 2026-06-13] NYT (June 23, 1915) reports the tunnel 'officially opened' with speeches; this ceremonial element was concurrent with the revenue-service opening — no separate earlier revenue date found.", "opened": "1915-06-22", "segment": { "fromStopIndex": 3, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260517010220/https://en.wikipedia.org/wiki/IRT_Flushing_Line", "kind": "wikipedia", "quote": "The tunnel opened for subway use on June 22, 1915, with service running between Grand Central and Vernon–Jackson Avenues.", "tier": "tertiary", "title": "IRT Flushing Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Flushing_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260517010220/https://en.wikipedia.org/wiki/IRT_Flushing_Line", "kind": "wikipedia", "quote": "On June 3, 1892, construction of the tunnel commenced.", "tier": "tertiary", "title": "IRT Flushing Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Flushing_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20250904080408/https://books.google.com/books?id=Az6dEkuGhccC", "kind": "other", "publisher": "Johns Hopkins University Press", "quote": "On June 3, 1892, construction of the tunnel commenced near the intersection of 50th Avenue and Vernon and Jackson Avenues. [cited to Hood2004, p. 164]", "tier": "secondary", "title": "722 Miles: The Building of the Subways and How They Transformed New York (Centennial ed., 2004) — Clifton Hood", "url": "https://books.google.com/books?id=Az6dEkuGhccC", "via": "https://en.wikipedia.org/wiki/IRT_Flushing_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20251205005416/https://www.nycsubway.org/wiki/IRT_Flushing_Line", "kind": "other", "publisher": "nycsubway.org", "quote": "On June 3rd, 1892, groundbreaking occurred at 50th Ave between Vernon and Jackson Avenues.", "tier": "tertiary", "title": "IRT Flushing Line — nycsubway.org", "url": "http://www.nycsubway.org/wiki/IRT_Flushing_Line", "via": "https://en.wikipedia.org/wiki/IRT_Flushing_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613162209/https://timesmachine.nytimes.com/timesmachine/1915/06/23/100163384.pdf", "kind": "news", "publisher": "The New York Times", "quote": "Article dated June 23, 1915 (day-after reporting). Headline 'Queensboro Tunnel Officially Opened' with mention of speeches. Wikipedia body text states this was when the tunnel 'opened for subway use', i.e., revenue service.", "tier": "secondary", "title": "Queensboro Tunnel Officially Opened — Subway, Started Twenty-Three Years Ago, Links Grand Central and Long Island City", "url": "https://timesmachine.nytimes.com/timesmachine/1915/06/23/100163384.pdf", "via": "https://en.wikipedia.org/wiki/IRT_Flushing_Line" } ] }, { "confidence": "medium", "geometryRef": "nyc-IRT Flushing Line", "id": "nyc-irt-flushing-line-19160215-1", "kind": "extension", "label": { "en": "Extension east: Vernon–Jackson Avenues → Hunters Point Avenue" }, "notes": "[Opening-date chase 2026-06-13] nycsubway.org's opening table erroneously lists Hunters Point Avenue as 11/5/1916; the Feb 16, 1916 NYT 'Subway Extension Open' article confirms Feb 15, 1916.", "opened": "1916-02-15", "segment": { "fromStopIndex": 4, "toStopIndex": 5 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260517010220/https://en.wikipedia.org/wiki/IRT_Flushing_Line", "kind": "wikipedia", "quote": "The Flushing Line was extended one stop from Vernon–Jackson Avenues to Hunters Point Avenue on February 15, 1916.", "tier": "tertiary", "title": "IRT Flushing Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Flushing_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20230722153214/https://timesmachine.nytimes.com/timesmachine/1916/02/16/100192409.pdf", "kind": "news", "publisher": "The New York Times", "quote": "Article dated February 16, 1916 with headline 'Subway Extension Open.; Many Use New Hunters Point Avenue Station' — day-after reporting confirming the extension was already open to passengers by February 16, consistent with February 15, 1916.", "tier": "secondary", "title": "Subway Extension Open – Many Use New Hunters Point Avenue Station", "url": "https://timesmachine.nytimes.com/timesmachine/1916/02/16/100192409.pdf", "via": "https://en.wikipedia.org/wiki/IRT_Flushing_Line" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "nyc-IRT Flushing Line", "id": "nyc-irt-flushing-line-19161105-2", "kind": "extension", "label": { "en": "Extension east: Hunters Point Avenue → Queensboro Plaza" }, "notes": "[Opening-date chase 2026-06-13] Internal Wikipedia day-level discrepancy: Queensboro Plaza station article states Nov 16 while citing the Nov 5, 1916 NYT source; curated Nov 5 aligns with the main line article and the same-day NYT report. Year is firm (1916).", "opened": "1916-11-05", "segment": { "fromStopIndex": 5, "toStopIndex": 7 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260517010220/https://en.wikipedia.org/wiki/IRT_Flushing_Line", "kind": "wikipedia", "quote": "On November 5, 1916, the Flushing Line was extended two more stops to the east to the Queensboro Plaza station.", "tier": "tertiary", "title": "IRT Flushing Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Flushing_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20221228022856/https://timesmachine.nytimes.com/timesmachine/1916/11/05/104027201.pdf", "kind": "news", "publisher": "The New York Times", "quote": "NYT article dated November 5, 1916, titled 'New Subway Link' — cited by the IRT Flushing Line main article to support November 5, 1916. Same-day publication consistent with a November 5 opening.", "tier": "secondary", "title": "New Subway Link", "url": "https://timesmachine.nytimes.com/timesmachine/1916/11/05/104027201.pdf", "via": "https://en.wikipedia.org/wiki/IRT_Flushing_Line" } ], "stationCount": 2 }, { "confidence": "medium", "geometryRef": "nyc-IRT Flushing Line", "id": "nyc-irt-flushing-line-19170421-3", "kind": "extension", "label": { "en": "Extension east: Queensboro Plaza → Alburtis Avenue (now 103rd Street–Corona Plaza)" }, "notes": "[Opening-date chase 2026-06-13] NYT headline 'Opened to the Public' explicitly confirms public revenue service on April 21, 1917.", "opened": "1917-04-21", "segment": { "fromStopIndex": 7, "toStopIndex": 18 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260517010220/https://en.wikipedia.org/wiki/IRT_Flushing_Line", "kind": "wikipedia", "quote": "The line was opened from Queensboro Plaza to Alburtis Avenue on April 21, 1917.", "tier": "tertiary", "title": "IRT Flushing Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Flushing_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20231223113022/https://timesmachine.nytimes.com/timesmachine/1917/04/22/102336714.pdf", "kind": "news", "publisher": "The New York Times", "quote": "NYT article dated April 22, 1917, headline 'Transit Service on Corona Extension of Dual Subway System Opened to the Public' — day-after reporting confirming April 21, 1917 as the public revenue service opening.", "tier": "secondary", "title": "Transit Service on Corona Extension of Dual Subway System Opened to the Public", "url": "https://timesmachine.nytimes.com/timesmachine/1917/04/22/102336714.pdf", "via": "https://en.wikipedia.org/wiki/IRT_Flushing_Line" } ] }, { "confidence": "medium", "geometryRef": "nyc-IRT Flushing Line", "id": "nyc-irt-flushing-line-19260322-4", "kind": "extension", "label": { "en": "Manhattan western extension: Grand Central → Fifth Avenue (temporary terminal)" }, "notes": "[Opening-date chase 2026-06-13] Library-ceremony noted in NYT was same-day as public service opening, not a prior VIP run. Fifth Avenue served as temporary terminus until the Times Square extension (March 14, 1927).", "opened": "1926-03-22", "segment": { "fromStopIndex": 2, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260517010220/https://en.wikipedia.org/wiki/IRT_Flushing_Line", "kind": "wikipedia", "quote": "The Fifth Avenue station opened on March 22, 1926, extending the IRT Flushing Line one stop to the west from the line's previous terminus at Grand Central.", "tier": "tertiary", "title": "IRT Flushing Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Flushing_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251105083529/https://www.nytimes.com/1926/03/23/archives/fifth-av-station-of-subway-opened-ceremonies-at-library-mark.html", "kind": "news", "publisher": "The New York Times", "quote": "NYT article dated March 23, 1926, headline 'Fifth Av. Station of Subway Opened; Ceremonies at Library Mark Completion of First Part of Queensboro Extension' — day-after reporting confirming March 22, 1926 opening.", "tier": "secondary", "title": "Fifth Av. Station of Subway Opened; Ceremonies at Library Mark Completion of First Part of Queensboro Extension", "url": "https://www.nytimes.com/1926/03/23/archives/fifth-av-station-of-subway-opened-ceremonies-at-library-mark.html", "via": "https://en.wikipedia.org/wiki/IRT_Flushing_Line" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "nyc-IRT Flushing Line", "id": "nyc-irt-flushing-line-19251013-5", "kind": "extension", "label": { "en": "Eastern extension: Alburtis Avenue → 111th Street" }, "notes": "Initially operated as shuttle service between 111th Street and the previous terminal at Alburtis Avenue. [Opening-date chase 2026-06-13] Service from day one was shuttle-only (Manhattan-bound track) but was public revenue service.", "opened": "1925-10-13", "segment": { "fromStopIndex": 18, "toStopIndex": 19 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260517010220/https://en.wikipedia.org/wiki/IRT_Flushing_Line", "kind": "wikipedia", "quote": "Service to 111th Street was inaugurated on October 13, 1925, with shuttle service running between 111th Street and the previous terminal at Alburtis Avenue.", "tier": "tertiary", "title": "IRT Flushing Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Flushing_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260513040545/https://www.newspapers.com/image/59882105/?terms=%22111th%2BStreet%22%2Bsubway%2Bqueens%2Bcorona", "kind": "news", "publisher": "Brooklyn Daily Eagle", "quote": "Brooklyn Daily Eagle article dated October 5, 1925, headline 'First Trains to be Run on Flushing Tube Line Oct. 13: Shuttle Operation Ordered to 111th Street Station on New Extension' — advance reporting confirming October 13, 1925 as the planned service start date.", "tier": "secondary", "title": "First Trains to be Run on Flushing Tube Line Oct. 13: Shuttle Operation Ordered to 111th Street Station on New Extension", "url": "https://www.newspapers.com/image/59882105/?terms=%22111th%2BStreet%22%2Bsubway%2Bqueens%2Bcorona", "via": "https://en.wikipedia.org/wiki/IRT_Flushing_Line" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "nyc-IRT Flushing Line", "id": "nyc-irt-flushing-line-19270314-6", "kind": "extension", "label": { "en": "Manhattan western extension: Fifth Avenue → Times Square (via 42nd Street–Bryant Park)" }, "notes": "Added the intermediate station under Bryant Park (Fifth Avenue) and the Times Square terminal. [Opening-date chase 2026-06-13] NYT 'Service Starts at Once After a Celebration' confirms revenue service and celebration were simultaneous on March 14; the Board of Transportation's originally-set March 15 date was moved up one day.", "opened": "1927-03-14", "segment": { "fromStopIndex": 1, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260517010220/https://en.wikipedia.org/wiki/IRT_Flushing_Line", "kind": "wikipedia", "quote": "The Flushing Line was extended to Times Square on March 14, 1927.", "tier": "tertiary", "title": "IRT Flushing Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Flushing_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20240117073246/https://www.nytimes.com/1927/03/15/archives/new-queens-subway-opened-to-times-sq-service-starts-at-once-after-a.html", "kind": "news", "publisher": "The New York Times", "quote": "NYT article dated March 15, 1927, headline 'New Queens Subway Opened to Times Sq.; Service Starts at Once After a Celebration by City and Civic Leaders' — day-after reporting confirming March 14, 1927. 'Service Starts at Once' confirms revenue service opened simultaneously with the celebration.", "tier": "secondary", "title": "New Queens Subway Opened to Times Sq.; Service Starts at Once After a Celebration by City and Civic Leaders", "url": "https://www.nytimes.com/1927/03/15/archives/new-queens-subway-opened-to-times-sq-service-starts-at-once-after-a.html", "via": "https://en.wikipedia.org/wiki/IRT_Flushing_Line" } ], "stationCount": 2 }, { "confidence": "medium", "geometryRef": "nyc-IRT Flushing Line", "id": "nyc-irt-flushing-line-19270507-7", "kind": "extension", "label": { "en": "Eastern extension: 111th Street → Willets Point Boulevard (now Mets–Willets Point)" }, "notes": "[Opening-date chase 2026-06-13] Partial-then-full: revenue passengers could first board via shuttle on May 7, 1927; through service began May 14, 1927 (same year).", "opened": "1927-05-07", "segment": { "fromStopIndex": 19, "toStopIndex": 20 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260517010220/https://en.wikipedia.org/wiki/IRT_Flushing_Line", "kind": "wikipedia", "quote": "the line was extended to Willets Point Boulevard on May 7, 1927.", "tier": "tertiary", "title": "IRT Flushing Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Flushing_Line" }, { "accessedAt": "2026-06-13", "kind": "news", "publisher": "The New York Times", "quote": "NYT article dated May 8, 1927, headline 'Corona Subway Extended' — day-after reporting confirming May 7, 1927 as the extension opening date.", "tier": "secondary", "title": "Corona Subway Extended", "url": "https://timesmachine.nytimes.com/timesmachine/1927/05/08/96646501.pdf", "via": "https://en.wikipedia.org/wiki/IRT_Flushing_Line" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "nyc-IRT Flushing Line", "id": "nyc-irt-flushing-line-19280121-8", "kind": "extension", "label": { "en": "Eastern extension to terminus: Willets Point Boulevard → Flushing–Main Street" }, "notes": "Completed the line's eastern terminus. The remaining (Corona Yard) tracks opened 16 April 1928. [Opening-date chase 2026-06-13] The 'remaining tracks opened April 16, 1928' note refers to Corona Yard infrastructure tracks, not a passenger station opening; Jan 21, 1928 is the revenue-service opening.", "opened": "1928-01-21", "segment": { "fromStopIndex": 20, "toStopIndex": 21 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260517010220/https://en.wikipedia.org/wiki/IRT_Flushing_Line", "kind": "wikipedia", "quote": "The eastern extension to Flushing–Main Street opened on January 21, 1928.", "tier": "tertiary", "title": "IRT Flushing Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Flushing_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260517010220/https://en.wikipedia.org/wiki/IRT_Flushing_Line", "kind": "wikipedia", "quote": "The remaining tracks opened on April 16, 1928.", "tier": "tertiary", "title": "IRT Flushing Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Flushing_Line" }, { "accessedAt": "2026-06-13", "kind": "news", "publisher": "The New York Times", "quote": "NYT article dated January 22, 1928, headline 'Flushing Rejoices as Subway Opens – Service by B.M.T. and I.R.T. Begins as Soon as Official Train Makes First Run' — day-after reporting confirming January 21, 1928. 'Begins as Soon as Official Train Makes First Run' confirms public service opened same day.", "tier": "secondary", "title": "Flushing Rejoices as Subway Opens – Service by B.M.T. and I.R.T. Begins as Soon as Official Train Makes First Run", "url": "https://timesmachine.nytimes.com/timesmachine/1928/01/22/94122788.pdf", "via": "https://en.wikipedia.org/wiki/IRT_Flushing_Line" }, { "accessedAt": "2026-06-13", "kind": "news", "publisher": "The New York Times", "quote": "NYT article dated January 12, 1928, headline 'Flushing Line Opens Jan. 21' — advance reporting confirming January 21, 1928 as the planned opening date.", "tier": "secondary", "title": "Flushing Line Opens Jan. 21", "url": "https://timesmachine.nytimes.com/timesmachine/1928/01/12/94119334.pdf", "via": "https://en.wikipedia.org/wiki/IRT_Flushing_Line" } ], "stationCount": 1 }, { "confidence": "high", "constructionStart": "2007", "cost": { "basis": "budget", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": false, "value": 2400000000, "year": 2015 }, "notes": "Total project cost $2.4 billion, funded with NYC municipal Tax Increment Financing (TIF) bond sales (earlier estimate $2.1 billion). Includes a $1.145 billion tunnelling contract awarded October 2007. Only the 34th St–Hudson Yards station was built; the planned 10th Avenue station was eliminated. Construction launch ceremony held 3 December 2007. [Citation chase 2026-06-11] The $2.4 billion is the revised budget cap after October 2007 cost overruns (the 10th Ave station was cut to stay within it); the $2–2.1 billion figures cited in 2006–2007 sources are the earlier estimates at bond issuance and groundbreaking. A clean primary source for the $2.4 billion final cost (e.g., the NYT \"Higher Costs Force Cutback\" Oct 20, 2007) was not reachable and would strengthen this record.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260609055432/https://en.wikipedia.org/wiki/7_Subway_Extension", "kind": "wikipedia", "quote": "The extension opened to the public on September 13, 2015.", "tier": "tertiary", "title": "7 Subway Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/7_Subway_Extension" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260609055432/https://en.wikipedia.org/wiki/7_Subway_Extension", "kind": "wikipedia", "quote": "The $2.4 billion extension was funded with New York City funds from municipal Tax Increment Financing (TIF) bond sales.", "tier": "tertiary", "title": "7 Subway Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/7_Subway_Extension" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260609055432/https://en.wikipedia.org/wiki/7_Subway_Extension", "kind": "wikipedia", "quote": "On December 3, 2007, the MTA conducted a ceremony at the Times Square subway station marking the launch of construction of the 7 train extension.", "tier": "tertiary", "title": "7 Subway Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/7_Subway_Extension" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20250814155545/https://web.archive.org/web/20071011125730/http://www.ny1.com/ny1/content/index.jsp?stid=5&aid=64913", "kind": "news", "publisher": "NY1", "quote": "There is no turning back now for the Number 7 line. Wednesday, the project got all the funding it will need to move forward, when the city sold $2 billion worth of bonds. ... Altogether, the project will cost $2 billion, and extend the line from Times Square over to 11th Avenue and down to 34th Street.", "tier": "secondary", "title": "City Raises $2 Billion In Bonds For No. 7 Line Extension", "url": "https://web.archive.org/web/20071011125730/http://www.ny1.com/ny1/content/index.jsp?stid=5&aid=64913", "via": "https://en.wikipedia.org/wiki/7_Subway_Extension" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20251227233623/https://www.nyc.gov/html/om/html/2007b/pr437-07.html", "kind": "primary", "publisher": "Mayor of New York City's Office", "quote": "The $2.1 billion project will foster transit oriented development in one of Manhattan's most underserved and underdeveloped areas... The first $1.14 billion contract for tunnel boring was approved by the MTA on October 24, 2007.", "tier": "primary", "title": "Mayor Bloomberg and Governor Spitzer Announce Start of Construction On #7 Subway Extension", "url": "https://www.nyc.gov/html/om/html/2007b/pr437-07.html", "via": "https://en.wikipedia.org/wiki/7_Subway_Extension" } ] }, "geometryRef": "nyc-IRT Flushing Line", "id": "nyc-irt-flushing-line-20150913-9", "kind": "extension", "label": { "en": "7 Subway Extension: Times Square → 34th Street–Hudson Yards" }, "notes": "[Opening-date chase 2026-06-13] Ribbon-cutting (~1 p.m.) and public revenue service were simultaneous on Sep 13, 2015. The December 2013 Bloomberg 'inaugural run' was a construction-phase tunnel preview, not a public opening.", "opened": "2015-09-13", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260609055432/https://en.wikipedia.org/wiki/7_Subway_Extension", "kind": "wikipedia", "quote": "The extension opened to the public on September 13, 2015.", "tier": "tertiary", "title": "7 Subway Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/7_Subway_Extension" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260609055432/https://en.wikipedia.org/wiki/7_Subway_Extension", "kind": "wikipedia", "quote": "The $2.4 billion extension was funded with New York City funds from municipal Tax Increment Financing (TIF) bond sales.", "tier": "tertiary", "title": "7 Subway Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/7_Subway_Extension" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260609055432/https://en.wikipedia.org/wiki/7_Subway_Extension", "kind": "wikipedia", "quote": "On December 3, 2007, the MTA conducted a ceremony at the Times Square subway station marking the launch of construction of the 7 train extension.", "tier": "tertiary", "title": "7 Subway Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/7_Subway_Extension" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20200224054737/https://web.archive.org/web/20160304003930/http://web.mta.info/capital/no7_alt.html", "kind": "primary", "publisher": "Metropolitan Transportation Authority", "quote": "The new station opened September 13, 2015. [quoted verbatim in 7 Subway Extension wikitext]", "tier": "primary", "title": "New 34 St-Hudson Yards 7 Station Opens — MTA Building for the Future", "url": "https://web.archive.org/web/20160304003930/http://web.mta.info/capital/no7_alt.html", "via": "https://en.wikipedia.org/wiki/7_Subway_Extension" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251125183003/https://www.wsj.com/articles/new-subway-station-opens-on-nycs-far-west-side-1442171470", "kind": "news", "publisher": "Wall Street Journal", "quote": "WSJ article dated September 13, 2015, headline 'New Subway Station Opens on NYC's Far West Side' — same-day reporting confirming September 13, 2015 as the public opening date.", "tier": "secondary", "title": "New Subway Station Opens on NYC's Far West Side", "url": "https://www.wsj.com/articles/new-subway-station-opens-on-nycs-far-west-side-1442171470", "via": "https://en.wikipedia.org/wiki/7_Subway_Extension" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20210914102231/https://abc7ny.com/980231/", "kind": "news", "publisher": "ABC7 New York", "quote": "Article dated September 13, 2015: 'City officials cut the ribbon Sunday for the No. 7 line leading from Times Square to Manhattan's far West Side at 34th Street.'", "tier": "secondary", "title": "New 7 line subway extension to the West Side opens", "url": "http://abc7ny.com/980231/", "via": "https://en.wikipedia.org/wiki/7_Subway_Extension" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260517010220/https://en.wikipedia.org/wiki/IRT_Flushing_Line", "kind": "wikipedia", "quote": "The tunnel opened for subway use on June 22, 1915, with service running between Grand Central and Vernon–Jackson Avenues.", "tier": "tertiary", "title": "IRT Flushing Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Flushing_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260609055432/https://en.wikipedia.org/wiki/7_Subway_Extension", "kind": "wikipedia", "quote": "The extension opened to the public on September 13, 2015.", "tier": "tertiary", "title": "7 Subway Extension — Wikipedia", "url": "https://en.wikipedia.org/wiki/7_Subway_Extension" } ] }, { "cityId": "nyc", "color": "#6D6E71", "displayNumber": "IRT 42nd Street Line", "id": "nyc-line-irt-42nd-street-line", "name": { "en": "IRT 42nd Street Line" }, "phases": [ { "confidence": "medium", "geometryRef": "nyc-IRT 42nd Street Line", "id": "nyc-irt-42nd-street-line-19041027-0", "kind": "initial", "label": { "en": "Original line opens as part of first IRT subway: Times Square → Grand Central (42nd St cross-town section)" }, "notes": "Not originally a shuttle. On 1904-10-27 the 42nd Street cross-town segment opened as the through-routed elbow of the city's first subway (City Hall → up Lexington/Park to 42nd St → west across 42nd St → up Broadway). The two stations later isolated as the shuttle (Times Square and Grand Central) date from this opening. [Opening-date chase 2026-06-13] Ceremonial and public revenue service both began October 27, 1904; ~150,000 riders day one per NYT.", "opened": "1904-10-27", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260417013834/https://en.wikipedia.org/wiki/42nd_Street_Shuttle", "kind": "wikipedia", "quote": "The subway through which the shuttle runs was opened on October 27, 1904, by the Interborough Rapid Transit Company (IRT), the first day of subway service in Manhattan.", "tier": "tertiary", "title": "42nd Street Shuttle — Wikipedia", "url": "https://en.wikipedia.org/wiki/42nd_Street_Shuttle" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427172840/https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway", "kind": "wikipedia", "quote": "The original subway line ran north from City Hall on what is now the IRT Lexington Avenue Line to 42nd Street, from where it turned west to run across 42nd Street.", "tier": "tertiary", "title": "Early history of the IRT subway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250816010719/https://www.nytimes.com/1904/10/28/archives/our-subway-open-150000-try-it-mayor-mcclellan-runs-the-first.html", "kind": "news", "publisher": "The New York Times", "quote": "Our Subway Open, 150,000 Try It — Mayor McClellan Runs the First Official Train — Big Crowds Ride At Night — Average of 25,000 An Hour from 7 P.M. Till Past Midnight [dateline October 28, 1904, reporting on October 27 opening]", "tier": "secondary", "title": "Our Subway Open, 150,000 Try It — Mayor McClellan Runs the First Official Train — Big Crowds Ride At Night — Average of 25,000 An Hour from 7 P.M. Till Past Midnight", "url": "https://www.nytimes.com/1904/10/28/archives/our-subway-open-150000-try-it-mayor-mcclellan-runs-the-first.html", "via": "https://en.wikipedia.org/wiki/42nd_Street_Shuttle" } ], "stationCount": 2 }, { "closed": "1918-08-02", "confidence": "medium", "geometryRef": null, "id": "nyc-irt-42nd-street-line-19180801-1", "kind": "renumber", "label": { "en": "H-system conversion: 42nd St segment becomes the shuttle (Times Square – Grand Central)" }, "notes": "Not a new line; a reconfiguration. With completion of the Lexington Avenue Line north of 42nd St and the Broadway–Seventh Avenue Line south of 42nd St, the Dual Contracts 'H system' split the original line into two trunks, leaving the 42nd St cross-town elbow to operate as a standalone shuttle. Tagged 'renumber' as the closest kind to a service reconfiguration of an existing segment. The shuttle was ordered closed by the Public Service Commission the day after opening (Aug 2, 1918) due to dangerous overcrowding. [Opening-date chase 2026-06-13] Live public/revenue launch (not ceremonial); station incomplete with temporary wooden flooring, and PSC ordered it closed the next day (Aug 2) for overcrowding.", "opened": "1918-08-01", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260417013834/https://en.wikipedia.org/wiki/42nd_Street_Shuttle", "kind": "wikipedia", "quote": "On August 1, 1918, the Dual System's 'H system' was put into service, with through trains over the IRT Lexington Avenue Line and IRT Broadway–Seventh Avenue Line, and only shuttle trains under 42nd Street.", "tier": "tertiary", "title": "42nd Street Shuttle — Wikipedia", "url": "https://en.wikipedia.org/wiki/42nd_Street_Shuttle" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260417013834/https://en.wikipedia.org/wiki/42nd_Street_Shuttle", "kind": "wikipedia", "quote": "The shuttle was heavily used, and the crowding conditions were so bad that the shuttle was ordered closed the next day by the Public Service Commission.", "tier": "tertiary", "title": "42nd Street Shuttle — Wikipedia", "url": "https://en.wikipedia.org/wiki/42nd_Street_Shuttle" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251030114821/https://timesmachine.nytimes.com/timesmachine/1918/08/02/97011929.pdf", "kind": "news", "publisher": "The New York Times", "quote": "[Article dated August 2, 1918, reporting on August 1 opening of H system including 42nd Street shuttle service]", "tier": "secondary", "title": "Open New Subway Lines to Traffic; Called a Triumph", "url": "https://timesmachine.nytimes.com/timesmachine/1918/08/02/97011929.pdf", "via": "https://en.wikipedia.org/wiki/42nd_Street_Shuttle" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20221108164119/https://timesmachine.nytimes.com/timesmachine/1918/08/03/97012303.pdf", "kind": "news", "publisher": "The New York Times", "quote": "[Article dated August 3, 1918, confirming shuttle opened August 1, then was ordered closed the next day by the Public Service Commission due to severe overcrowding]", "tier": "secondary", "title": "Drop Shuttle Plan as Subway Crush Becomes a Peril", "url": "https://timesmachine.nytimes.com/timesmachine/1918/08/03/97012303.pdf", "via": "https://en.wikipedia.org/wiki/42nd_Street_Shuttle" } ], "stationCount": 0 }, { "closed": "1918-08-02", "confidence": "high", "geometryRef": null, "id": "nyc-irt-42nd-street-line-19180928-2", "kind": "reopening", "label": { "en": "Shuttle reopens with improved passageways and platforms" }, "notes": "Reopening after the ~8-week closure that the Public Service Commission ordered on 1918-08-02 over overcrowding/safety. The 'closed' date here is the Aug 2, 1918 shutdown that began this closure-and-reopening cycle. [Opening-date chase 2026-06-13] Permanent reopening with improved passageways/platforms; IRT advance notice dated Sept 27 (Princeton PUDL link now dead) is a pre-announcement, not an earlier opening.", "opened": "1918-09-28", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260417013834/https://en.wikipedia.org/wiki/42nd_Street_Shuttle", "kind": "wikipedia", "quote": "The shuttle reopened on September 28, 1918, with improved passageways and platforms.", "tier": "tertiary", "title": "42nd Street Shuttle — Wikipedia", "url": "https://en.wikipedia.org/wiki/42nd_Street_Shuttle" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250828024713/https://pudl.princeton.edu/sheetreader.php?obj=7e1011bd-d756-4cde-9fa8-fdda2ce8d6e3", "kind": "primary", "publisher": "Interborough Rapid Transit Company", "quote": "[IRT operational notice titled 'Shuttle Service In Operation', dated September 27, 1918 — advance notice of the September 28 service resumption]", "tier": "primary", "title": "Shuttle Service In Operation", "url": "http://pudl.princeton.edu/sheetreader.php?obj=7e1011bd-d756-4cde-9fa8-fdda2ce8d6e3", "via": "https://en.wikipedia.org/wiki/42nd_Street_Shuttle" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613162316/https://timesmachine.nytimes.com/timesmachine/1918/09/28/102839331.pdf", "kind": "news", "publisher": "The New York Times", "quote": "[NYT article dated September 28, 1918, page 17, confirming shuttle resumes service on that date with improved passageways and platforms]", "tier": "secondary", "title": "Subway Shuttle Resumes Today", "url": "https://timesmachine.nytimes.com/timesmachine/1918/09/28/102839331.pdf", "via": "https://en.wikipedia.org/wiki/42nd_Street_Shuttle" } ] }, { "closed": "2020-04-06", "confidence": "high", "constructionStart": "2019", "cost": { "basis": "estimate", "confidence": "high", "nominal": { "currency": "USD", "isEstimate": true, "value": 264340000, "year": 2019 }, "notes": "Two-part figure: $235.41M reconfiguration + $28.93M Times Square access improvements = $264.34M. From MTA project estimates as reported by Wikipedia; this is the budgeted/estimated cost rather than a confirmed final outturn. Separately, the broader '42 St Connection' corridor program was estimated around $750M, which is wider in scope than this shuttle reconstruction. [Citation chase 2026-06-11] The $264.34M figure is directly verified in the MTA FFY2017 Public Hearing \"Description of Projects Booklet\" as two \"Estimated Federal Request\" line items (T7041307 = $235.41M, T7041404 = $28.93M), confirming these are 2016 capital-program estimates rather than a final outturn; a later Jan 2020 CPOC document shows a revised bundled shuttle budget of about $253M after post-award re-scoping.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260417013834/https://en.wikipedia.org/wiki/42nd_Street_Shuttle", "kind": "wikipedia", "quote": "On August 2, 2019, the MTA announced that work on the project would begin on August 16.", "tier": "tertiary", "title": "42nd Street Shuttle — Wikipedia", "url": "https://en.wikipedia.org/wiki/42nd_Street_Shuttle" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260417013834/https://en.wikipedia.org/wiki/42nd_Street_Shuttle", "kind": "wikipedia", "quote": "The new platforms finally opened on September 7, 2021.", "tier": "tertiary", "title": "42nd Street Shuttle — Wikipedia", "url": "https://en.wikipedia.org/wiki/42nd_Street_Shuttle" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260417013834/https://en.wikipedia.org/wiki/42nd_Street_Shuttle", "kind": "wikipedia", "quote": "Improving access to Times Square will cost $28.93 million, while the reconfiguration project will cost $235.41 million.", "tier": "tertiary", "title": "42nd Street Shuttle — Wikipedia", "url": "https://en.wikipedia.org/wiki/42nd_Street_Shuttle" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260518104240/https://www.mta.info/project/42-st-connection", "kind": "primary", "quote": "42 St Connection", "tier": "primary", "title": "42 St Connection — MTA", "url": "https://www.mta.info/project/42-st-connection" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20260308210323/http://web.mta.info/capitaldashboard/allframenew_head.html?PROJNUM=t7041404&PLTYPE=1", "kind": "primary", "publisher": "Metropolitan Transportation Authority", "quote": "Project: T7041404 Needs Code: SGR Description: Reconstruction of Times Square Shuttle - Phase 3 Category: Passenger Stations Element: Other Station Improvements … This project will reconstruct the Times Square Shuttle station within the Times Square Complex. All components shall be brought to a state of good repair. Additional station reconfiguration options will be explored during design. The project will convert the existing 3-track shuttle operation to a 2-track, 6-car operation.", "tier": "primary", "title": "T7041404 Reconstruction of Times Square Shuttle – Phase 3 (MTA Capital Dashboard)", "url": "http://web.mta.info/capitaldashboard/allframenew_head.html?PROJNUM=t7041404&PLTYPE=1", "via": "https://en.wikipedia.org/wiki/42nd_Street_Shuttle" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20240331154556/http://web.mta.info/mta/news/books/pdf/190325_1400_CPOC.pdf", "kind": "primary", "publisher": "Metropolitan Transportation Authority", "quote": "Projects Awarded since November 2018 — Total of Projects Awarded: $524.3M", "tier": "primary", "title": "Capital Program Oversight Committee Meeting – March 2019", "url": "http://web.mta.info/mta/news/books/pdf/190325_1400_CPOC.pdf", "via": "https://en.wikipedia.org/wiki/42nd_Street_Shuttle" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20161009062442/http://web.mta.info/mta/news/hearings/160823/Description-of-Projects-Booklet.pdf", "kind": "primary", "publisher": "Metropolitan Transportation Authority", "quote": "T7041307 ADA: Times Square, Phase 3 ‐ Shuttle 235.41 … T7041404 Station Reconstruction: Times Square, Phase 3 ‐ Shuttle 28.93", "tier": "primary", "title": "Metropolitan Transportation Authority (MTA) Notice of Public Hearing and Description of Projects — Federal Fiscal Year 2017 Capital Improvement Projects", "url": "http://web.mta.info/mta/news/hearings/160823/Description-of-Projects-Booklet.pdf", "via": "https://en.wikipedia.org/wiki/42nd_Street_Shuttle" } ] }, "geometryRef": null, "id": "nyc-irt-42nd-street-line-20210907-3", "kind": "reopening", "label": { "en": "Major reconstruction: rebuilt three-track shuttle reduced to two wider platforms, new fully accessible station opens" }, "notes": "Construction began Aug 16, 2019 (announced Aug 2, 2019); the project reconfigured the historic three-track shuttle into two tracks with two wider, ADA-accessible platforms. A full shutdown ran from April 6, 2020 (expedited by the COVID-19 pandemic) before service and the new platforms opened Sept 7, 2021. Cost figure is an MTA estimate, not a verified final cost. [Date chase 2026-06-12] Construction start (Aug 16, 2019) traces to the MTA's August 2019 'Building a Better 42 St Shuttle' brochure (HTTP 403) and is corroborated by the NY Daily News headline 'Three-Year Project Starts Aug. 16' (access-blocked). The mta.info/project/42-st-connection phase source returned HTTP 403; the 'Early history of the IRT subway' line-level source covers only the original 1904 construction and is irrelevant to this 2019-2021 reconstruction. [Opening-date chase 2026-06-13] Reconstruction (started Aug 16, 2019) reduced three tracks to two wider, fully accessible platforms; opening date rests on MTA CPOC Dec 2020 documentation.", "opened": "2021-09-07", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260417013834/https://en.wikipedia.org/wiki/42nd_Street_Shuttle", "kind": "wikipedia", "quote": "On August 2, 2019, the MTA announced that work on the project would begin on August 16.", "tier": "tertiary", "title": "42nd Street Shuttle — Wikipedia", "url": "https://en.wikipedia.org/wiki/42nd_Street_Shuttle" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260417013834/https://en.wikipedia.org/wiki/42nd_Street_Shuttle", "kind": "wikipedia", "quote": "The new platforms finally opened on September 7, 2021.", "tier": "tertiary", "title": "42nd Street Shuttle — Wikipedia", "url": "https://en.wikipedia.org/wiki/42nd_Street_Shuttle" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260417013834/https://en.wikipedia.org/wiki/42nd_Street_Shuttle", "kind": "wikipedia", "quote": "Improving access to Times Square will cost $28.93 million, while the reconfiguration project will cost $235.41 million.", "tier": "tertiary", "title": "42nd Street Shuttle — Wikipedia", "url": "https://en.wikipedia.org/wiki/42nd_Street_Shuttle" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260518104240/https://www.mta.info/project/42-st-connection", "kind": "primary", "quote": "42 St Connection", "tier": "primary", "title": "42 St Connection — MTA", "url": "https://www.mta.info/project/42-st-connection" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20230405212248/https://new.mta.info/sites/default/files/2019-08/42ST-brochure_no_crops.pdf", "kind": "primary", "publisher": "Metropolitan Transportation Authority", "quote": "Work on the project would begin on August 16 [2019].", "tier": "primary", "title": "Building a Better 42 St Shuttle — MTA brochure", "url": "https://new.mta.info/sites/default/files/2019-08/42ST-brochure_no_crops.pdf", "via": "https://en.wikipedia.org/wiki/42nd_Street_Shuttle" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20230406212210/https://www.nydailynews.com/new-york/ny-42nd-street-shuttle-20190802-pxkndnhnevarbpwnha4tjkbjie-story.html", "kind": "news", "publisher": "New York Daily News", "quote": "Three-Year Project Starts Aug. 16 [2019]", "tier": "secondary", "title": "42nd Street Shuttle to Get Facelift; Three-Year Project Starts Aug. 16", "url": "https://www.nydailynews.com/new-york/ny-42nd-street-shuttle-20190802-pxkndnhnevarbpwnha4tjkbjie-story.html", "via": "https://en.wikipedia.org/wiki/42nd_Street_Shuttle" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20240329171457/https://new.mta.info/document/25216", "kind": "primary", "publisher": "Metropolitan Transportation Authority", "quote": "[MTA CPOC December 2020 document is cited by Wikipedia as the source for 'The new platforms finally opened on September 7, 2021']", "tier": "primary", "title": "Capital Program Oversight Committee Meeting December 2020 — MTA", "url": "https://new.mta.info/document/25216", "via": "https://en.wikipedia.org/wiki/42nd_Street_Shuttle" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260417013834/https://en.wikipedia.org/wiki/42nd_Street_Shuttle", "kind": "wikipedia", "quote": "The subway through which the shuttle runs was opened on October 27, 1904, by the Interborough Rapid Transit Company (IRT), the first day of subway service in Manhattan.", "tier": "tertiary", "title": "42nd Street Shuttle — Wikipedia", "url": "https://en.wikipedia.org/wiki/42nd_Street_Shuttle" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260427172840/https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway", "kind": "wikipedia", "quote": "The original subway line ran north from City Hall on what is now the IRT Lexington Avenue Line to 42nd Street, from where it turned west to run across 42nd Street.", "tier": "tertiary", "title": "Early history of the IRT subway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Early_history_of_the_IRT_subway" } ] }, { "cityId": "nyc", "color": "#EE352E", "displayNumber": "IRT White Plains Road Line", "id": "nyc-line-irt-white-plains-road-line", "name": { "en": "IRT White Plains Road Line" }, "phases": [ { "confidence": "low", "geometryRef": "nyc-IRT White Plains Road Line", "id": "nyc-irt-white-plains-road-line-19041126-0", "kind": "initial", "label": { "en": "Initial opening: 180th Street → Jackson Avenue (West Farms Division, Contract 1)" }, "notes": "[Opening-date chase 2026-06-13] November 26, 1904 is the revenue-service opening of the initial West Farms Division segment (180th St-Bronx Park to Jackson Avenue); no ceremonial-only pre-opening found. nycsubway.org independently lists the same date.", "opened": "1904-11-26", "segment": { "fromStopIndex": 10, "toStopIndex": 18 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260509142448/https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line", "kind": "wikipedia", "quote": "The initial segment of the IRT White Plains Road Line opened on November 26, 1904 between East 180th Street and Jackson Avenue.", "tier": "tertiary", "title": "IRT White Plains Road Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line" } ] }, { "confidence": "medium", "geometryRef": "nyc-IRT White Plains Road Line", "id": "nyc-irt-white-plains-road-line-19050710-1", "kind": "extension", "label": { "en": "Through service via IRT Lenox Avenue Line connection opens" }, "notes": "[Opening-date chase 2026-06-13] July 10, 1905 marks the start of through IRT subway service via the Lenox Avenue Line connection (first train just after midnight); prior service on the segment was elevated-only. Corroborated by the IRT Lenox Avenue Line Wikipedia article.", "opened": "1905-07-10", "segment": { "fromStopIndex": 18, "toStopIndex": 20 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260509142448/https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line", "kind": "wikipedia", "quote": "Once the connection to the IRT Lenox Avenue Line opened on July 10, 1905, trains from the newly opened IRT subway ran via the line.", "tier": "tertiary", "title": "IRT White Plains Road Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20211217082525/https://timesmachine.nytimes.com/timesmachine/1905/07/10/101363643.pdf", "kind": "news", "publisher": "The New York Times", "quote": "Title indicates West Farms and South Ferry Stations opened and through subway service began; article dated July 10, 1905", "tier": "secondary", "title": "Subway Trains Running From Bronx to Battery — West Farms and South Ferry Stations Open at Midnight", "url": "https://timesmachine.nytimes.com/timesmachine/1905/07/10/101363643.pdf", "via": "https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line" } ] }, { "confidence": "medium", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": false, "value": 100000, "year": 1910 }, "notes": "Cost to build the single in-fill Intervale Avenue station; financed by private capital per Wikipedia. [Citation chase 2026-06-11] The contemporary NYT report (April 28, 1910) states the station cost \"nearly $100,000\"; the $100,000 figure is a rounding of that. The cited PSC First District report page (Google Books ID 5yg_AQAAMAAJ, p. 424) could not be verified (paywall).", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260509142448/https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line", "kind": "wikipedia", "quote": "Intervale Avenue station opened on April 30, 1910 as an in-fill station... The station was built at the cost of $100,000, and it was paid with private capital.", "tier": "tertiary", "title": "IRT White Plains Road Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20240607043757/https://timesmachine.nytimes.com/timesmachine/1910/04/28/101228907.pdf", "kind": "news", "publisher": "The New York Times", "quote": "It has cost nearly $100,000 and was paid for with private capital, the money being subscribed by the Henry Morgenthau Company, George F. Johnson, and Mrs. Jacob Ruppert and the Broadway-Cathedral Parkway Company.", "tier": "secondary", "title": "New Escalator Subway Station Ready", "url": "https://timesmachine.nytimes.com/timesmachine/1910/04/28/101228907.pdf", "via": "https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line" } ] }, "geometryRef": null, "id": "nyc-irt-white-plains-road-line-19100430-2", "kind": "extension", "label": { "en": "Intervale Avenue in-fill station opens" }, "notes": "[Opening-date chase 2026-06-13] April 30, 1910 confirmed by the Intervale Avenue station Wikipedia article infobox. The cited NYT article is an April 28 preview ('New Escalator Subway Station Ready'), two days before opening — consistent.", "opened": "1910-04-30", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260509142448/https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line", "kind": "wikipedia", "quote": "Intervale Avenue station opened on April 30, 1910 as an in-fill station... The station was built at the cost of $100,000, and it was paid with private capital.", "tier": "tertiary", "title": "IRT White Plains Road Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20240607043757/https://timesmachine.nytimes.com/timesmachine/1910/04/28/101228907.pdf", "kind": "news", "publisher": "The New York Times", "quote": "Article dated April 28, 1910 titled 'New Escalator Subway Station Ready' — a preview article (2 days before opening); indicates station was ready for opening but does not itself state April 30 as the date", "tier": "secondary", "title": "New Escalator Subway Station Ready", "url": "https://timesmachine.nytimes.com/timesmachine/1910/04/28/101228907.pdf", "via": "https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": null, "id": "nyc-irt-white-plains-road-line-19101028-3", "kind": "extension", "label": { "en": "New 180th Street (Zoological Park) terminal opens, replacing temporary 180th St station" }, "notes": "[Opening-date chase 2026-06-13] October 28, 1910 is a station-replacement event: the new 180th St (Zoological Park) terminal opened, replacing the temporary 180th St-Bronx Park terminal. Consistent across Wikipedia and nycsubway.org.", "opened": "1910-10-28", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260509142448/https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line", "kind": "wikipedia", "quote": "On October 28, 1910, the new 180th Street station, known as Zoological Park station, opened as the new terminal of the West Farms Division of the subway, replacing the temporary station at 180th Street, which was later abandoned.", "tier": "tertiary", "title": "IRT White Plains Road Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20240705011440/https://timesmachine.nytimes.com/timesmachine/1910/10/28/104952966.pdf", "kind": "news", "publisher": "The New York Times", "quote": "Title 'Subway Station at West Farms Open' dated October 28, 1910 — same day as reported opening", "tier": "secondary", "title": "Subway Station at West Farms Open", "url": "https://timesmachine.nytimes.com/timesmachine/1910/10/28/104952966.pdf", "via": "https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "nyc-IRT White Plains Road Line", "id": "nyc-irt-white-plains-road-line-19170303-4", "kind": "extension", "label": { "en": "Dual Contracts extension opens: 177th St–East Tremont Avenue → 219th St–White Plains Road" }, "notes": "[Opening-date chase 2026-06-13] March 3, 1917 revenue-service opening (177th St to 219th St) confirmed by a primary PSC Public Service Record excerpt: 'placed in service at 2:30 P.M., Saturday, March 3.' Operated initially as a four-car shuttle.", "opened": "1917-03-03", "segment": { "fromStopIndex": 4, "toStopIndex": 11 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260509142448/https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line", "kind": "wikipedia", "quote": "The first segment opened on March 3, 1917, from East 177th Street–East Tremont Avenue to East 219th Street–White Plains Road, providing the Bronx communities of Williamsbridge and Wakefield with access to rapid transit service. Service on the new portion of the line was operated as a four-car shuttle from 177th Street due to the power conditions at the time.", "tier": "tertiary", "title": "IRT White Plains Road Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20240914044517/https://timesmachine.nytimes.com/timesmachine/1917/03/04/102320289.pdf", "kind": "news", "publisher": "The New York Times", "quote": "Title explicitly states 'Opened to the Public'; article dated March 4, 1917 (day after opening)", "tier": "secondary", "title": "White Plains Road Extension of Subway Opened to the Public — New Branch, Which Runs from 177th to 219th Street", "url": "https://timesmachine.nytimes.com/timesmachine/1917/03/04/102320289.pdf", "via": "https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line" } ] }, { "confidence": "medium", "geometryRef": "nyc-IRT White Plains Road Line", "id": "nyc-irt-white-plains-road-line-19170331-5", "kind": "extension", "label": { "en": "Extension: 219th Street → 238th Street" }, "notes": "[Opening-date chase 2026-06-13] March 31, 1917 revenue-service opening (219th St to 238th St) confirmed by a primary PSC Public Service Record excerpt: 'placed in operation on Saturday, March 31...at 3 P.M.'", "opened": "1917-03-31", "segment": { "fromStopIndex": 1, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260509142448/https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line", "kind": "wikipedia", "quote": "Service was extended to East 238th Street on March 31, 1917.", "tier": "tertiary", "title": "IRT White Plains Road Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251116112744/https://timesmachine.nytimes.com/timesmachine/1917/04/01/102326919.pdf", "kind": "news", "publisher": "The New York Times", "quote": "Title 'New Subway Line Opened — White Plains Extension is Now Running to 238th Street'; article dated April 1, 1917 (day after opening on March 31)", "tier": "secondary", "title": "New Subway Line Opened — White Plains Extension is Now Running to 238th Street", "url": "https://timesmachine.nytimes.com/timesmachine/1917/04/01/102326919.pdf", "via": "https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line" } ] }, { "confidence": "medium", "geometryRef": "nyc-IRT White Plains Road Line", "id": "nyc-irt-white-plains-road-line-19201213-6", "kind": "extension", "label": { "en": "Final extension: 238th Street → 241st Street–White Plains Road (permanent terminus)" }, "notes": "[Opening-date chase 2026-06-13] December 13, 1920 confirmed by the NYT article's own title ('Opens to 241st Street Tomorrow,' published Dec 12) and the Wakefield-241st Street station Wikipedia article. Opening was delayed by 239th Street Yard construction.", "opened": "1920-12-13", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260509142448/https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line", "kind": "wikipedia", "quote": "On December 13, 1920, the final portion of the line opened, extending the line from its previous terminal at 238th Street to the line's permanent terminus at 241st Street.", "tier": "tertiary", "title": "IRT White Plains Road Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20240914044515/https://timesmachine.nytimes.com/timesmachine/1920/12/12/112665334.pdf", "kind": "news", "publisher": "The New York Times", "quote": "Title explicitly states 'Opens to 241st Street Tomorrow'; article dated December 12, 1920, confirming December 13 as the opening date", "tier": "secondary", "title": "Subway Line Extended — White Plains Avenue Branch Opens to 241st Street Tomorrow", "url": "https://timesmachine.nytimes.com/timesmachine/1920/12/12/112665334.pdf", "via": "https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": null, "id": "nyc-irt-white-plains-road-line-19490613-7", "kind": "extension", "label": { "en": "Platform extensions (Jackson Avenue → 177th Street) for ten-car express trains" }, "notes": "[Opening-date chase 2026-06-13] Platform-extension event (Jackson Ave to 177th St lengthened to 514 ft for ten-car express trains), not a new segment opening. June 13, 1949 attributed to the NYC Board of Transportation 1949 report (primary), but that HathiTrust source returned HTTP 403 and is unverifiable; date rests on Wikipedia alone.", "opened": "1949-06-13", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260509142448/https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line", "kind": "wikipedia", "quote": "On June 13, 1949, the platforms extensions at the stations on the line from Jackson Avenue to 177th Street opened. The platforms were lengthened to 514 feet (157 m) to allow full ten-car express trains to platform.", "tier": "tertiary", "title": "IRT White Plains Road Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line" } ] }, { "confidence": "medium", "geometryRef": null, "id": "nyc-irt-white-plains-road-line-19570506-8", "kind": "extension", "label": { "en": "Direct connection of IRT Dyre Avenue Line to White Plains Road Line north of 180th St; through service begins" }, "notes": "[Opening-date chase 2026-06-13] May 6, 1957 confirmed by the NYT 'IRT Spur Opens Today' article (same-day) and the IRT Dyre Avenue Line Wikipedia article. Through service ran 5:30 AM-8:30 PM initially, with overnight shuttle continuing.", "opened": "1957-05-06", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260509142448/https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line", "kind": "wikipedia", "quote": "The Dyre Avenue Line was connected directly to the White Plains Road Line north of East 180th Street for $3 million and through service began on May 6, 1957.", "tier": "tertiary", "title": "IRT White Plains Road Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line" }, { "accessedAt": "2026-06-13", "kind": "news", "publisher": "The New York Times", "quote": "Title 'IRT Spur Opens Today' dated May 6, 1957 — confirming public opening on May 6, 1957", "tier": "secondary", "title": "IRT Spur Opens Today — Dyre Avenue Line in Bronx Will Have Five Stations", "url": "https://timesmachine.nytimes.com/timesmachine/1957/05/06/90803273.pdf", "via": "https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260509142448/https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line", "kind": "wikipedia", "quote": "The initial segment of the IRT White Plains Road Line opened on November 26, 1904 between East 180th Street and Jackson Avenue.", "tier": "tertiary", "title": "IRT White Plains Road Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_White_Plains_Road_Line" } ] }, { "cityId": "nyc", "color": "#00933C", "displayNumber": "IRT Jerome Avenue Line", "id": "nyc-line-irt-jerome-avenue-line", "name": { "en": "IRT Jerome Avenue Line" }, "phases": [ { "confidence": "high", "cost": { "basis": "estimate", "confidence": "high", "nominal": { "currency": "USD", "isEstimate": true, "value": 7000000, "year": 1918 }, "notes": "Figure of ~$7 million is for the ENTIRE Jerome Avenue line (both the 1917 and 1918 openings combined), not this segment alone: $3M for the elevated section and $4M for the underground section. Built under Contract 3 of the Dual Contracts (signed 19 March 1913). Price-level year is approximate (construction-era, 1917–1918). [Citation chase 2026-06-11] Figure originates as a contemporary forecast from the NYT (June 3, 1917): the line \"will cost approximately, when completed, about $7,000,000.\" Verified via two corroborating sources — the NYT primary report (paywalled) and nycsubway.org's verbatim transcription (Darlington/Pirmann). A separate Public Service Record (June 1917) figure of ~$3M refers only to the elevated-section contracts exclusive of operator-furnished equipment, not the full-line total.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260530154859/https://en.wikipedia.org/wiki/IRT_Jerome_Avenue_Line", "kind": "wikipedia", "quote": "The first part of the line opened on June 2, 1917 as a shuttle service between Kingsbridge Road and 149th Street.", "tier": "tertiary", "title": "IRT Jerome Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Jerome_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260530154859/https://en.wikipedia.org/wiki/IRT_Jerome_Avenue_Line", "kind": "wikipedia", "quote": "The Jerome Avenue line cost approximately $7 million, with $3 million spent on the elevated section and $4 million spent on the underground section.", "tier": "tertiary", "title": "IRT Jerome Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Jerome_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260530154859/https://en.wikipedia.org/wiki/IRT_Jerome_Avenue_Line", "kind": "wikipedia", "quote": "As part of Contract 3, the IRT agreed to build an elevated line along Jerome Avenue in the Bronx.", "tier": "tertiary", "title": "IRT Jerome Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Jerome_Avenue_Line" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20260103092206/https://www.nycsubway.org/wiki/IRT_Woodlawn_Line", "kind": "other", "publisher": "nycsubway.org (Darlington, Peggy and Pirmann, David)", "quote": "Including the subway and elevated portion from 135th Street north to Woodlawn Road the Jerome Avenue line will cost approximately, when completed, about $7,000,000. The elevated portion has cost about $3,000,000 to construct and the subway portion slightly over $4,000,000.", "tier": "secondary", "title": "IRT Woodlawn Line", "url": "http://www.nycsubway.org/wiki/IRT_Woodlawn_Line", "via": "https://en.wikipedia.org/wiki/IRT_Jerome_Avenue_Line" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20250220152225/https://www.nytimes.com/1917/06/03/archives/three-new-links-of-the-dual-subway-system-opened-including-a.html", "kind": "news", "publisher": "The New York Times", "quote": "Including the subway and elevated portion from 135th Street north to Woodlawn Road the Jerome Avenue line will cost approximately, when completed, about $7,000,000. The elevated portion has cost about $3,000,000 to construct and the subway portion slightly over $4,000,000.", "tier": "primary", "title": "Three New Links of the Dual Subway System Opened", "url": "https://www.nytimes.com/1917/06/03/archives/three-new-links-of-the-dual-subway-system-opened-including-a.html", "via": "https://en.wikipedia.org/wiki/IRT_Jerome_Avenue_Line" } ] }, "geometryRef": "nyc-IRT Jerome Avenue Line", "id": "nyc-irt-jerome-avenue-line-19170602-0", "kind": "initial", "label": { "en": "Stage 1 opens: Kingsbridge Road → 149th Street–Grand Concourse (initial shuttle service)" }, "notes": "[Opening-date chase 2026-06-13] Contemporary primary source (Public Service Record, June 1917) confirms revenue/public service began June 2, 1917 with an official ceremony at 2:30 PM followed by regular passengers; this stage ran as a shuttle (Kingsbridge Road–149th St) only.", "opened": "1917-06-02", "segment": { "fromStopIndex": 3, "toStopIndex": 14 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260530154859/https://en.wikipedia.org/wiki/IRT_Jerome_Avenue_Line", "kind": "wikipedia", "quote": "The first part of the line opened on June 2, 1917 as a shuttle service between Kingsbridge Road and 149th Street.", "tier": "tertiary", "title": "IRT Jerome Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Jerome_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260530154859/https://en.wikipedia.org/wiki/IRT_Jerome_Avenue_Line", "kind": "wikipedia", "quote": "The Jerome Avenue line cost approximately $7 million, with $3 million spent on the elevated section and $4 million spent on the underground section.", "tier": "tertiary", "title": "IRT Jerome Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Jerome_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260530154859/https://en.wikipedia.org/wiki/IRT_Jerome_Avenue_Line", "kind": "wikipedia", "quote": "As part of Contract 3, the IRT agreed to build an elevated line along Jerome Avenue in the Bronx.", "tier": "tertiary", "title": "IRT Jerome Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Jerome_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260416083641/https://www.nycsubway.org/wiki/Service_Begun_on_the_Jerome_Avenue_Line_(1917)", "kind": "primary", "publisher": "Public Service Record (via nycsubway.org)", "quote": "The principal portion of the Jerome Avenue branch of the Lexington Avenue Subway was placed in operation on June 2 [1917] with appropriate ceremonies.", "tier": "primary", "title": "Service Begun on the Jerome Avenue Line (1917)", "url": "https://www.nycsubway.org/wiki/Service_Begun_on_the_Jerome_Avenue_Line_(1917)", "via": "https://en.wikipedia.org/wiki/IRT_Jerome_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613162533/https://babel.hathitrust.org/cgi/pt?id=mdp.39015016416920;seq=24", "kind": "primary", "publisher": "Interborough Rapid Transit Company (via HathiTrust)", "tier": "primary", "title": "Annual report of the Interborough Rapid Transit Company For The Year Ended June 30, 1917", "url": "http://hdl.handle.net/2027/mdp.39015016416920?urlappend=%3Bseq=24", "via": "https://en.wikipedia.org/wiki/IRT_Jerome_Avenue_Line" } ], "stationCount": 10 }, { "confidence": "high", "geometryRef": "nyc-IRT Jerome Avenue Line", "id": "nyc-irt-jerome-avenue-line-19180415-1", "kind": "extension", "label": { "en": "Stage 2 opens: Kingsbridge Road → Woodlawn (northern extension, adds Mosholu Parkway and Woodlawn)" }, "notes": "[Opening-date chase 2026-06-13] April 15, 1918 extension from Kingsbridge Road to Woodlawn (adding Mosholu Parkway and Woodlawn) initially ran as a shuttle with transfers at 167th Street; through service began July 17, 1918.", "opened": "1918-04-15", "segment": { "fromStopIndex": 0, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260530154859/https://en.wikipedia.org/wiki/IRT_Jerome_Avenue_Line", "kind": "wikipedia", "quote": "The line was extended from Kingsbridge Road to its final terminal of Woodlawn on April 15, 1918.", "tier": "tertiary", "title": "IRT Jerome Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Jerome_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251006002924/https://www.nytimes.com/1918/04/13/archives/jerome-av-line-ordered-opened.html", "kind": "news", "publisher": "The New York Times", "tier": "secondary", "title": "Jerome Av. Line Ordered Opened.", "url": "https://www.nytimes.com/1918/04/13/archives/jerome-av-line-ordered-opened.html", "via": "https://en.wikipedia.org/wiki/IRT_Jerome_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260103092206/https://www.nycsubway.org/wiki/IRT_Woodlawn_Line", "kind": "other", "publisher": "nycsubway.org", "quote": "Bedford Park Boulevard, Mosholu Parkway, [and] Woodlawn [opened on] April 15, 1918.", "tier": "tertiary", "title": "IRT Woodlawn Line", "url": "https://www.nycsubway.org/wiki/IRT_Woodlawn_Line", "via": "https://en.wikipedia.org/wiki/IRT_Jerome_Avenue_Line" } ], "stationCount": 2 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260530154859/https://en.wikipedia.org/wiki/IRT_Jerome_Avenue_Line", "kind": "wikipedia", "quote": "The first part of the line opened on June 2, 1917 as a shuttle service between Kingsbridge Road and 149th Street.", "tier": "tertiary", "title": "IRT Jerome Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Jerome_Avenue_Line" } ] }, { "cityId": "nyc", "color": "#00933C", "displayNumber": "IRT Pelham Line", "id": "nyc-line-irt-pelham-line", "name": { "en": "IRT Pelham Line" }, "phases": [ { "confidence": "high", "geometryRef": "nyc-IRT Pelham Line", "id": "nyc-irt-pelham-line-19180801-0", "kind": "initial", "label": { "en": "Initial section opens: branch from Lexington Avenue Line to Third Avenue–138th Street" }, "notes": "Built as part of the Dual Contracts (agreement reached March 19, 1913). In November 1915 the New York Public Service Commission approved plans for construction of Section 2 of the line. The Pelham Line branches off the IRT Lexington Avenue Line (which opened July 17, 1918); the first station unique to the Pelham Line is Third Avenue–138th Street, so the initial phase added 1 station. [Opening-date chase 2026-06-13] nycsubway.org erroneously lists 1/17/1919 for this station; contradicted by day-of press and treated as a fan-site data error.", "opened": "1918-08-01", "segment": { "fromStopIndex": 17, "toStopIndex": 18 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260425203121/https://en.wikipedia.org/wiki/IRT_Pelham_Line", "kind": "wikipedia", "quote": "the first section of the IRT Pelham Line opened to Third Avenue–138th Street on August 1, 1918.", "tier": "tertiary", "title": "IRT Pelham Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Pelham_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260425203121/https://en.wikipedia.org/wiki/IRT_Pelham_Line", "kind": "wikipedia", "quote": "Third Avenue–138th Street ... August 1, 1918", "tier": "tertiary", "title": "IRT Pelham Line — Wikipedia (station listing)", "url": "https://en.wikipedia.org/wiki/IRT_Pelham_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260509141755/https://www.newspapers.com/image/55625816/?terms=subway%2Bextension", "kind": "news", "publisher": "Brooklyn Daily Eagle", "quote": "Article dated August 1, 1918 titled 'Opening New Subway H Shortens Distance to A. & S.' — day-of coverage confirms August 1, 1918 as the revenue opening", "tier": "secondary", "title": "Opening New Subway 'H' Shortens Distance to A. & S.", "url": "https://www.newspapers.com/image/55625816/?terms=subway%2Bextension", "via": "https://en.wikipedia.org/wiki/IRT_Pelham_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20221124063313/https://timesmachine.nytimes.com/timesmachine/1918/08/01/97011398.pdf", "kind": "news", "publisher": "The New York Times", "quote": "Article dated August 1, 1918 headlined 'New Subway Lines Will Open Tonight' confirms revenue opening on August 1, 1918", "tier": "secondary", "title": "New Subway Lines Will Open Tonight: Ceremonies to Mark Through Service on 7th and Lexington Links of System", "url": "https://timesmachine.nytimes.com/timesmachine/1918/08/01/97011398.pdf", "via": "https://en.wikipedia.org/wiki/Third_Avenue%E2%80%93138th_Street_station_(IRT_Pelham_Line)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251116044815/https://books.google.com/books?id=Ob0JAAAAIAAJ&pg=PA372", "kind": "other", "publisher": "Brooklyn Daily Eagle", "quote": "1922 almanac (p.372) lists August 1, 1918 as the opening date for Third Avenue–138th Street station; cited repeatedly across Wikipedia station articles", "tier": "secondary", "title": "Brooklyn Daily Eagle Almanac", "url": "https://books.google.com/books?id=Ob0JAAAAIAAJ&pg=PA372", "via": "https://en.wikipedia.org/wiki/IRT_Pelham_Line" } ], "stationCount": 1 }, { "confidence": "high", "geometryRef": "nyc-IRT Pelham Line", "id": "nyc-irt-pelham-line-19190107-1", "kind": "extension", "label": { "en": "Extension: Third Avenue–138th Street → Hunts Point Avenue" }, "notes": "Six new stations opened: Brook Avenue, Cypress Avenue, East 143rd Street–St. Mary's Street, East 149th Street, Longwood Avenue, and Hunts Point Avenue. The extension was originally to be finished by the end of 1918 but was delayed due to difficulty acquiring materials.", "opened": "1919-01-07", "segment": { "fromStopIndex": 11, "toStopIndex": 17 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260425203121/https://en.wikipedia.org/wiki/IRT_Pelham_Line", "kind": "wikipedia", "quote": "On January 7, 1919, the Pelham Line was extended to Hunts Point Avenue.", "tier": "tertiary", "title": "IRT Pelham Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Pelham_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260425203121/https://en.wikipedia.org/wiki/IRT_Pelham_Line", "kind": "wikipedia", "quote": "Brook Avenue ... January 7, 1919 ... Hunts Point Avenue ... January 7, 1919", "tier": "tertiary", "title": "IRT Pelham Line — Wikipedia (station listing)", "url": "https://en.wikipedia.org/wiki/IRT_Pelham_Line" }, { "accessedAt": "2026-06-13", "kind": "news", "publisher": "New-York Tribune", "quote": "Dated January 9, 1919 (two days after opening), headline says 'Is Opened' and 'Interborough Now Operating Cars to Hunt's Point Station' — past-tense language confirms January 7, 1919 as the revenue opening", "tier": "secondary", "title": "New Bronx Subway Extension Is Opened: Interborough Now Operating Cars to Hunt's Point Station Above 138th Street", "url": "https://www.newspapers.com/clip/35902326/", "via": "https://en.wikipedia.org/wiki/IRT_Pelham_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251116044815/https://books.google.com/books?id=Ob0JAAAAIAAJ&pg=PA372", "kind": "other", "publisher": "Brooklyn Daily Eagle", "quote": "1922 almanac (p.372) cited for January 7, 1919 opening date for stations Brook Avenue through Hunts Point Avenue", "tier": "secondary", "title": "Brooklyn Daily Eagle Almanac", "url": "https://books.google.com/books?id=Ob0JAAAAIAAJ&pg=PA372", "via": "https://en.wikipedia.org/wiki/IRT_Pelham_Line" } ], "stationCount": 6 }, { "confidence": "high", "geometryRef": "nyc-IRT Pelham Line", "id": "nyc-irt-pelham-line-19200530-2", "kind": "extension", "label": { "en": "Extension: Hunts Point Avenue → East 177th Street (Parkchester)" }, "notes": "Five new stations: Whitlock Avenue, Elder Avenue, Morrison Avenue–Soundview, St. Lawrence Avenue, and East 177th Street (now Parkchester). Whitlock Avenue is the southernmost elevated station. [Opening-date chase 2026-06-13] NYT article date (May 28) creates minor day-level ambiguity; IRT Annual Report (primary) and Almanac both cite May 30. Year 1920 not in doubt.", "opened": "1920-05-30", "segment": { "fromStopIndex": 6, "toStopIndex": 11 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260425203121/https://en.wikipedia.org/wiki/IRT_Pelham_Line", "kind": "wikipedia", "quote": "On May 30, 1920, the Pelham Line was extended to East 177th Street.", "tier": "tertiary", "title": "IRT Pelham Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Pelham_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260425203121/https://en.wikipedia.org/wiki/IRT_Pelham_Line", "kind": "wikipedia", "quote": "Whitlock Avenue ... May 30, 1920 ... Parkchester ... May 30, 1920", "tier": "tertiary", "title": "IRT Pelham Line — Wikipedia (station listing)", "url": "https://en.wikipedia.org/wiki/IRT_Pelham_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20230509033517/https://timesmachine.nytimes.com/timesmachine/1920/05/28/118322488.pdf", "kind": "news", "publisher": "The New York Times", "quote": "Article dated May 28, 1920 with title 'Bronx Subway Extension Opened' — article date is two days before the curated opening date of May 30; could be advance copy or indicate May 28 opening; not accessible to verify", "tier": "secondary", "title": "Bronx Subway Extension Opened", "url": "https://timesmachine.nytimes.com/timesmachine/1920/05/28/118322488.pdf", "via": "https://en.wikipedia.org/wiki/IRT_Pelham_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20240121235002/https://books.google.com/books?id=xRzVAAAAMAAJ&q=may+30,+1920+pelham+line", "kind": "primary", "publisher": "Interborough Rapid Transit Company", "quote": "IRT operator annual report (pp.5,13) cited for May 30, 1920 extension opening; Google Books full text not accessible in preview but date cited explicitly in Wikipedia", "tier": "primary", "title": "Annual Report of the Interborough Rapid Transit Company for the Year Ending June 30, 1920", "url": "https://books.google.com/books?id=xRzVAAAAMAAJ&q=may+30,+1920+pelham+line", "via": "https://en.wikipedia.org/wiki/IRT_Pelham_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251116044815/https://books.google.com/books?id=Ob0JAAAAIAAJ&pg=PA372", "kind": "other", "publisher": "Brooklyn Daily Eagle", "quote": "1922 almanac (p.372) cited for May 30, 1920 as opening date for Whitlock Avenue through Parkchester stations", "tier": "secondary", "title": "Brooklyn Daily Eagle Almanac", "url": "https://books.google.com/books?id=Ob0JAAAAIAAJ&pg=PA372", "via": "https://en.wikipedia.org/wiki/IRT_Pelham_Line" } ], "stationCount": 5 }, { "confidence": "high", "geometryRef": "nyc-IRT Pelham Line", "id": "nyc-irt-pelham-line-19201024-3", "kind": "extension", "label": { "en": "Extension: East 177th Street → Westchester Square–East Tremont Avenue" }, "notes": "Three new stations: Castle Hill Avenue, Zerega Avenue, and Westchester Square–East Tremont Avenue. [Opening-date chase 2026-06-13] Day-of-week cross-check: Oct 24, 1920 was a Sunday, matching the NYT 'Opens Sunday' advance headline.", "opened": "1920-10-24", "segment": { "fromStopIndex": 3, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260425203121/https://en.wikipedia.org/wiki/IRT_Pelham_Line", "kind": "wikipedia", "quote": "on October 24, 1920, it was extended to Westchester Square", "tier": "tertiary", "title": "IRT Pelham Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Pelham_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260425203121/https://en.wikipedia.org/wiki/IRT_Pelham_Line", "kind": "wikipedia", "quote": "Castle Hill Avenue ... October 24, 1920 ... Westchester Square–East Tremont Avenue ... October 24, 1920", "tier": "tertiary", "title": "IRT Pelham Line — Wikipedia (station listing)", "url": "https://en.wikipedia.org/wiki/IRT_Pelham_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20171222053458/https://query.nytimes.com/gst/abstract.html?res=9B0CE2DB1630E433A25751C2A9669D946195D6CF&legacy=true", "kind": "news", "publisher": "The New York Times", "quote": "Dated October 22, 1920 (Friday), headline 'Subway Extension Opens Sunday' — October 24, 1920 was a Sunday, directly confirming the revenue opening date", "tier": "secondary", "title": "Subway Extension Opens Sunday", "url": "https://query.nytimes.com/gst/abstract.html?res=9B0CE2DB1630E433A25751C2A9669D946195D6CF&legacy=true", "via": "https://en.wikipedia.org/wiki/IRT_Pelham_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251116044815/https://books.google.com/books?id=Ob0JAAAAIAAJ&pg=PA372", "kind": "other", "publisher": "Brooklyn Daily Eagle", "quote": "1922 almanac (p.372) cited for October 24, 1920 as opening date for Castle Hill Avenue, Zerega Avenue, and Westchester Square–East Tremont Avenue", "tier": "secondary", "title": "Brooklyn Daily Eagle Almanac", "url": "https://books.google.com/books?id=Ob0JAAAAIAAJ&pg=PA372", "via": "https://en.wikipedia.org/wiki/IRT_Pelham_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250126235459/https://books.google.com/books?id=plRNAAAAYAAJ&q=pelham+line+subway&pg=PA2389", "kind": "other", "publisher": "Moody Manual Company", "quote": "1922 Moody's Manual (p.2389) cited as a source for October 24, 1920 extension opening to Westchester Square", "tier": "secondary", "title": "Moody's Manual of Railroads and Corporation Securities", "url": "https://books.google.com/books?id=plRNAAAAYAAJ&q=pelham+line+subway&pg=PA2389", "via": "https://en.wikipedia.org/wiki/IRT_Pelham_Line" } ], "stationCount": 3 }, { "confidence": "high", "geometryRef": "nyc-IRT Pelham Line", "id": "nyc-irt-pelham-line-19201220-4", "kind": "extension", "label": { "en": "Extension: Westchester Square → Pelham Bay Park (line completed)" }, "notes": "Three new stations completing the line: Middletown Road, Buhre Avenue, and Pelham Bay Park (the northern terminal).", "opened": "1920-12-20", "segment": { "fromStopIndex": 0, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260425203121/https://en.wikipedia.org/wiki/IRT_Pelham_Line", "kind": "wikipedia", "quote": "on December 20, it was extended to the western edge of Pelham Bay Park.", "tier": "tertiary", "title": "IRT Pelham Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Pelham_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260425203121/https://en.wikipedia.org/wiki/IRT_Pelham_Line", "kind": "wikipedia", "quote": "Middletown Road ... December 20, 1920 ... Pelham Bay Park ... December 20, 1920", "tier": "tertiary", "title": "IRT Pelham Line — Wikipedia (station listing)", "url": "https://en.wikipedia.org/wiki/IRT_Pelham_Line" }, { "accessedAt": "2026-06-13", "kind": "news", "publisher": "New York Herald", "quote": "Dated December 19, 1920, headline 'Will Open Subway to Pelham Bay Park: Service Begins To-Morrow on Four Mile Extension' — 'To-Morrow' explicitly confirms December 20, 1920 as the revenue opening date", "tier": "secondary", "title": "Will Open Subway to Pelham Bay Park: Service Begins To-Morrow on Four Mile Extension", "url": "https://www.newspapers.com/clip/90126089/", "via": "https://en.wikipedia.org/wiki/IRT_Pelham_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250920022720/https://books.google.com/books?id=KO0rAQAAMAAJ&q=May+30", "kind": "other", "publisher": "Bronx Board of Trade", "quote": "1931 Bronx Board of Trade survey (p.27) cited for December 20, 1920 opening to Pelham Bay Park", "tier": "secondary", "title": "A Comprehensive General and Industrial Survey: The Bronx in the City of New York", "url": "https://books.google.com/books?id=KO0rAQAAMAAJ&q=May+30", "via": "https://en.wikipedia.org/wiki/IRT_Pelham_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251116044815/https://books.google.com/books?id=Ob0JAAAAIAAJ&pg=PA372", "kind": "other", "publisher": "Brooklyn Daily Eagle", "quote": "1922 almanac (p.372) cited for December 20, 1920 as opening date for Middletown Road, Buhre Avenue, and Pelham Bay Park stations", "tier": "secondary", "title": "Brooklyn Daily Eagle Almanac", "url": "https://books.google.com/books?id=Ob0JAAAAIAAJ&pg=PA372", "via": "https://en.wikipedia.org/wiki/IRT_Pelham_Line" } ], "stationCount": 3 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260425203121/https://en.wikipedia.org/wiki/IRT_Pelham_Line", "kind": "wikipedia", "quote": "the first section of the IRT Pelham Line opened to Third Avenue–138th Street on August 1, 1918.", "tier": "tertiary", "title": "IRT Pelham Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Pelham_Line" } ] }, { "cityId": "nyc", "color": "#00933C", "displayNumber": "IRT Dyre Avenue Line", "id": "nyc-line-irt-dyre-avenue-line", "name": { "en": "IRT Dyre Avenue Line" }, "phases": [ { "confidence": "medium", "geometryRef": "nyc-IRT Dyre Avenue Line", "id": "nyc-irt-dyre-avenue-line-19120529-0", "kind": "initial", "label": { "en": "NYW&B opens: New York, Westchester and Boston Railway (predecessor interurban; Bronx segment north of East 180th St later became the Dyre Avenue Line)" }, "notes": "This is the predecessor railway, not the NYC Subway line. The NYW&B was an electrified interurban commuter line from the Harlem River to White Plains and Port Chester. The Bronx portion north of East 180th Street (with stations Dyre Avenue/Eastchester, Baychester Avenue, Gun Hill Road, Pelham Parkway, Morris Park) is the right-of-way that the city later rehabilitated into the rapid-transit Dyre Avenue Line.", "opened": "1912-05-29", "segment": { "fromStopIndex": 0, "toStopIndex": 5 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260530154846/https://en.wikipedia.org/wiki/IRT_Dyre_Avenue_Line", "kind": "wikipedia", "quote": "The NYW&B opened on May 29, 1912.", "tier": "tertiary", "title": "IRT Dyre Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Dyre_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260202070045/https://en.wikipedia.org/wiki/Eastchester%E2%80%93Dyre_Avenue_station", "kind": "wikipedia", "quote": "The Eastchester–Dyre Avenue station initially opened as a New York, Westchester and Boston Railway station on May 29, 1912.", "tier": "tertiary", "title": "Eastchester–Dyre Avenue station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Eastchester%E2%80%93Dyre_Avenue_station" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260207172607/https://en.wikipedia.org/wiki/New_York,_Westchester_and_Boston_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "Passenger service began on May 29, 1912, between Adams Street in the Bronx (the modern East 180th Street station) and North Avenue in New Rochelle.", "tier": "tertiary", "title": "New York, Westchester and Boston Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/New_York,_Westchester_and_Boston_Railway", "via": "https://en.wikipedia.org/wiki/IRT_Dyre_Avenue_Line" } ] }, { "closed": "1937-12-31", "confidence": "medium", "geometryRef": null, "id": "nyc-irt-dyre-avenue-line-19371231-1", "kind": "reopening", "label": { "en": "NYW&B abandoned: entire railway closes due to bankruptcy" }, "notes": "Closure phase. The English IRT Dyre Avenue Line article gives the abandonment date as December 31, 1937; the Eastchester–Dyre Avenue station article gives December 12, 1937 for the station's closure. Using the widely-cited line-level date Dec 31, 1937 and recording the Dec 12 station-closure discrepancy here. (Schema 'kind' has no 'closure' value; recorded here as the closure that the 1941 reopening reverses.) [Opening-date chase 2026-06-13] This phase records the NYW&B abandonment (closure), not a revenue-service opening. The Eastchester-Dyre Avenue station article gives a contradictory Dec 12, 1937 (vs Dec 31) — likely an editorial error; Dec 31, 1937 is the better-attested cessation date.", "opened": "1937-12-31", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260530154846/https://en.wikipedia.org/wiki/IRT_Dyre_Avenue_Line", "kind": "wikipedia", "quote": "The NYW&B was abandoned on December 31, 1937 due to bankruptcy.", "tier": "tertiary", "title": "IRT Dyre Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Dyre_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260202070045/https://en.wikipedia.org/wiki/Eastchester%E2%80%93Dyre_Avenue_station", "kind": "wikipedia", "quote": "It closed December 12, 1937 when the railway went bankrupt.", "tier": "tertiary", "title": "Eastchester–Dyre Avenue station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Eastchester%E2%80%93Dyre_Avenue_station" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260207172607/https://en.wikipedia.org/wiki/New_York,_Westchester_and_Boston_Railway", "kind": "other", "publisher": "Wikipedia", "quote": "The NYW&B ceased operations on December 31, 1937.", "tier": "tertiary", "title": "New York, Westchester and Boston Railway — Wikipedia", "url": "https://en.wikipedia.org/wiki/New_York,_Westchester_and_Boston_Railway", "via": "https://en.wikipedia.org/wiki/IRT_Dyre_Avenue_Line" } ] }, { "confidence": "low", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": false, "value": 1800000, "year": 1940 }, "notes": "$1,800,000 was the April 1940 PURCHASE price the NYC Board of Transportation paid for the NYW&B right-of-way in the Bronx north of East 180th Street; the line was then rehabilitated (rehabilitation cost not separately itemized) and reopened as a shuttle on May 15, 1941. Five stations on the shuttle: Eastchester–Dyre Avenue, Baychester Avenue, Gun Hill Road, Pelham Parkway, Morris Park. [Citation chase 2026-06-11] The $1,800,000 figure traces to a single secondary source (Wikipedia), whose lone supporting citation — Cudahy, \"A Century of Subways\" (Fordham UP, 2003), pp. 59–60 — is paywalled and could not be independently verified; no contemporary source confirming the dollar amount was accessible, so the curated \"high\" confidence is not fully supported.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260530154846/https://en.wikipedia.org/wiki/IRT_Dyre_Avenue_Line", "kind": "wikipedia", "quote": "The New York City Board of Transportation (BOT) bought the NYW&B within the Bronx north of East 180th Street in April 1940 for $1,800,000 and rehabilitated the line.", "tier": "tertiary", "title": "IRT Dyre Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Dyre_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260530154846/https://en.wikipedia.org/wiki/IRT_Dyre_Avenue_Line", "kind": "wikipedia", "quote": "On May 15, 1941, a shuttle service was implemented between Dyre Avenue and East 180th Street using IRT gate cars.", "tier": "tertiary", "title": "IRT Dyre Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Dyre_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260202070045/https://en.wikipedia.org/wiki/Eastchester%E2%80%93Dyre_Avenue_station", "kind": "wikipedia", "quote": "The station was then rebuilt and reopened as a NYC Subway station on May 15, 1941.", "tier": "tertiary", "title": "Eastchester–Dyre Avenue station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Eastchester%E2%80%93Dyre_Avenue_station" } ] }, "geometryRef": null, "id": "nyc-irt-dyre-avenue-line-19410515-2", "kind": "reopening", "label": { "en": "Dyre Avenue shuttle opens: Dyre Avenue → East 180th Street (NYC Subway shuttle on rebuilt NYW&B Bronx segment)" }, "opened": "1941-05-15", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260530154846/https://en.wikipedia.org/wiki/IRT_Dyre_Avenue_Line", "kind": "wikipedia", "quote": "The New York City Board of Transportation (BOT) bought the NYW&B within the Bronx north of East 180th Street in April 1940 for $1,800,000 and rehabilitated the line.", "tier": "tertiary", "title": "IRT Dyre Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Dyre_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260530154846/https://en.wikipedia.org/wiki/IRT_Dyre_Avenue_Line", "kind": "wikipedia", "quote": "On May 15, 1941, a shuttle service was implemented between Dyre Avenue and East 180th Street using IRT gate cars.", "tier": "tertiary", "title": "IRT Dyre Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Dyre_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260202070045/https://en.wikipedia.org/wiki/Eastchester%E2%80%93Dyre_Avenue_station", "kind": "wikipedia", "quote": "The station was then rebuilt and reopened as a NYC Subway station on May 15, 1941.", "tier": "tertiary", "title": "Eastchester–Dyre Avenue station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Eastchester%E2%80%93Dyre_Avenue_station" } ], "stationCount": 5 }, { "confidence": "low", "cost": { "basis": "outturn", "confidence": "low", "nominal": { "currency": "USD", "isEstimate": false, "value": 3000000, "year": 1957 }, "notes": "$3 million paid to build the physical connection between the Dyre Avenue Line and the IRT White Plains Road Line north of East 180th Street, enabling through (non-shuttle) service. Operation transferred from the IND Division to the IRT Division on May 4, 1957 (making it the IRT Dyre Avenue–East 174th Street Line); through service began two days later on May 6, 1957. [Citation chase 2026-06-11] The $3M figure rests solely on Wikipedia's single citation (NYT, May 7, 1957, p. 37), which is paywalled and could not be verified; the contemporaneous NYCTA 1956-57 Annual Report confirms the connection project and 1957 through service but does not itemize this cost. Figure is nominal 1957 USD for the physical flyover connection only and excludes the 1940-41 acquisition/rehabilitation of the former NYW&B right-of-way.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260530154846/https://en.wikipedia.org/wiki/IRT_Dyre_Avenue_Line", "kind": "wikipedia", "quote": "The Dyre Avenue Line was connected directly to the White Plains Road Line north of East 180th Street for $3 million and through service began on May 6, 1957.", "tier": "tertiary", "title": "IRT Dyre Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Dyre_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260530154846/https://en.wikipedia.org/wiki/IRT_Dyre_Avenue_Line", "kind": "wikipedia", "quote": "On May 4, 1957, the operation of the line was transferred from the IND Division to the IRT Division, making it the IRT Dyre Avenue–East 174th Street Line.", "tier": "tertiary", "title": "IRT Dyre Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Dyre_Avenue_Line" } ] }, "geometryRef": null, "id": "nyc-irt-dyre-avenue-line-19570506-3", "kind": "renumber", "label": { "en": "Through service / IRT integration: connected to IRT White Plains Road Line north of East 180th St; line transferred to IRT Division" }, "notes": "[Opening-date chase 2026-06-13] The May 4, 1957 transfer from IND to IRT Division was administrative; public through-service to Manhattan (replacing the shuttle) began May 6, 1957.", "opened": "1957-05-06", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260530154846/https://en.wikipedia.org/wiki/IRT_Dyre_Avenue_Line", "kind": "wikipedia", "quote": "The Dyre Avenue Line was connected directly to the White Plains Road Line north of East 180th Street for $3 million and through service began on May 6, 1957.", "tier": "tertiary", "title": "IRT Dyre Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Dyre_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260530154846/https://en.wikipedia.org/wiki/IRT_Dyre_Avenue_Line", "kind": "wikipedia", "quote": "On May 4, 1957, the operation of the line was transferred from the IND Division to the IRT Division, making it the IRT Dyre Avenue–East 174th Street Line.", "tier": "tertiary", "title": "IRT Dyre Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Dyre_Avenue_Line" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260530154846/https://en.wikipedia.org/wiki/IRT_Dyre_Avenue_Line", "kind": "wikipedia", "quote": "The NYW&B opened on May 29, 1912.", "tier": "tertiary", "title": "IRT Dyre Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Dyre_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260202070045/https://en.wikipedia.org/wiki/Eastchester%E2%80%93Dyre_Avenue_station", "kind": "wikipedia", "quote": "The Eastchester–Dyre Avenue station initially opened as a New York, Westchester and Boston Railway station on May 29, 1912.", "tier": "tertiary", "title": "Eastchester–Dyre Avenue station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Eastchester%E2%80%93Dyre_Avenue_station" } ] }, { "cityId": "nyc", "color": "#EE352E", "displayNumber": "IRT Lenox Avenue Line", "id": "nyc-line-irt-lenox-avenue-line", "name": { "en": "IRT Lenox Avenue Line" }, "phases": [ { "confidence": "high", "constructionStart": "1900", "geometryRef": "nyc-IRT Lenox Avenue Line", "id": "nyc-irt-lenox-avenue-line-19041123-0", "kind": "initial", "label": { "en": "Initial opening: 110th Street → 145th Street (East Side Branch / Contract 1)" }, "notes": "[Date chase 2026-06-12] Construction start 1900 corroborated by two primary sources cited in Wikipedia: 1905 Board of Rapid Transit Railroad Commissioners Report (archive.org, pp. 229-236) and 1978 HAER Civil Engineering record (LoC, p. 252). Earliest Section 8 start: August 30, 1900. [Opening-date chase 2026-06-13] Revenue service began 'just after midnight' Nov 23, 1904; corroborated by the NYT front-page article 'East Side Subway Open' (Nov 23, 1904). No ceremonial-only pre-opening.", "opened": "1904-11-23", "segment": { "fromStopIndex": 1, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260523135008/https://en.wikipedia.org/wiki/145th_Street_station_(IRT_Lenox_Avenue_Line)", "kind": "wikipedia", "quote": "On November 23, 1904, the East Side Branch opened to 145th Street.", "tier": "tertiary", "title": "145th Street station (IRT Lenox Avenue Line) — Wikipedia", "url": "https://en.wikipedia.org/wiki/145th_Street_station_(IRT_Lenox_Avenue_Line)" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260502150846/https://en.wikipedia.org/wiki/IRT_Lenox_Avenue_Line", "kind": "wikipedia", "quote": "The line opened south of 145th Street just after midnight on November 23, 1904, as part of the IRT's original system.", "tier": "tertiary", "title": "IRT Lenox Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Lenox_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260502150846/https://en.wikipedia.org/wiki/IRT_Lenox_Avenue_Line", "kind": "wikipedia", "quote": "The company began building the section from 110th Street to 135th Street on August 30, 1900, and the section from 103rd Street to 110th Street and Lenox Avenue on October 2, 1900.", "tier": "tertiary", "title": "IRT Lenox Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Lenox_Avenue_Line" }, { "accessedAt": "2026-06-12", "kind": "primary", "publisher": "Board of Rapid Transit Railroad Commissioners", "quote": "Cited at pages 229–236 of the 1905 report as the source for Farrell & Hopper beginning Section 8 construction on August 30, 1900 (110th–135th St) and October 2, 1900 (103rd–110th St and Lenox Avenue). Full text accessible via Internet Archive; PDF too large to retrieve directly but metadata confirms document existence.", "tier": "primary", "title": "Report of the Board of Rapid Transit Railroad Commissioners for the City of New York For The Year Ending December 31, 1904", "url": "https://archive.org/details/cu31924022794253/page/n253/mode/2up?q=april+28", "via": "https://en.wikipedia.org/wiki/IRT_Lenox_Avenue_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260221085621/https://tile.loc.gov/storage-services/master/pnp/habshaer/ny/ny0300/ny0387/data/ny0387data.pdf", "kind": "primary", "publisher": "Historic American Engineering Record / Library of Congress", "quote": "Cited at page 252 as a source for construction start dates for Section 8 (Lenox Avenue Line). Wikipedia's wikitext cites this alongside the 1905 Commissioners Report for the August 30, 1900 and October 2, 1900 start dates.", "tier": "primary", "title": "Design and Construction of the IRT: Civil Engineering (HAER)", "url": "https://tile.loc.gov/storage-services/master/pnp/habshaer/ny/ny0300/ny0387/data/ny0387data.pdf", "via": "https://en.wikipedia.org/wiki/IRT_Lenox_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20160305040825/http://query.nytimes.com/gst/abstract.html?res=9C00E7D6113DE633A25750C2A9679D946597D6CF", "kind": "news", "publisher": "The New York Times", "quote": "East Side Subway Open [headline dated November 23, 1904, page 1] — cited in Wikipedia wikitext as the source for the November 23, 1904 opening date.", "tier": "secondary", "title": "East Side Subway Open — Train from 145th Street to Broadway in 9 Minutes and 40 Seconds", "url": "https://query.nytimes.com/gst/abstract.html?res=9C00E7D6113DE633A25750C2A9679D946597D6CF", "via": "https://en.wikipedia.org/wiki/IRT_Lenox_Avenue_Line" } ], "stationCount": 5 }, { "confidence": "medium", "geometryRef": null, "id": "nyc-irt-lenox-avenue-line-19050710-1", "kind": "extension", "label": { "en": "Service extended onto IRT White Plains Road Line (West Farms Branch connection)" }, "notes": "[Opening-date chase 2026-06-13] July 10, 1905 is the revenue opening of through-service onto the IRT White Plains Road Line (West Farms Branch); NYT headline confirms stations opened at midnight. This is a service extension/connection rather than a new physical segment of the Lenox Avenue Line.", "opened": "1905-07-10", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260502150846/https://en.wikipedia.org/wiki/IRT_Lenox_Avenue_Line", "kind": "wikipedia", "quote": "The first train ran from the line onto the IRT White Plains Road Line (known as the West Farms Branch or the West Farms Extension) just after midnight on July 10, 1905.", "tier": "tertiary", "title": "IRT Lenox Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Lenox_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20160305075547/http://query.nytimes.com/gst/abstract.html?res=9F01E1DC103AE733A25753C1A9619C946497D6CF", "kind": "news", "publisher": "The New York Times", "quote": "Subway Trains Running From Bronx to Battery — West Farms and South Ferry Stations Open at Midnight [headline dated July 10, 1905, page 1] — cited in Wikipedia wikitext as the source for the July 10, 1905 extension date.", "tier": "secondary", "title": "Subway Trains Running From Bronx to Battery — West Farms and South Ferry Stations Open at Midnight — Start Without a Hitch", "url": "https://query.nytimes.com/gst/abstract.html?res=9F01E1DC103AE733A25753C1A9619C946497D6CF", "via": "https://en.wikipedia.org/wiki/IRT_Lenox_Avenue_Line" } ] }, { "confidence": "high", "cost": { "basis": "outturn", "confidence": "low", "nominal": { "currency": "USD", "isEstimate": false, "value": 8021000, "year": 1968 }, "notes": "Total for the 148th St terminal project: station $1.29M + track improvements $3.178M + signaling $3.553M = ~$8.02M. Built economically on existing Lenox Yard tracks rather than new excavation. Originally named Lenox Terminal–148th Street. [Citation chase 2026-06-11] The full $8.021M breakdown rests on a single Wikipedia citation (a New York Amsterdam News article via fultonhistory.com) that could not be reached and has no Wayback snapshot; the NYT and ERA Bulletin refs cover only the opening dates, not cost, so the figure is currently unverified.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124156/https://en.wikipedia.org/wiki/Harlem%E2%80%93148th_Street_station", "kind": "wikipedia", "quote": "Trains began operating without passengers to the 148th Street station on May 5, 1968, and the station officially opened on May 13, 1968.", "tier": "tertiary", "title": "Harlem–148th Street station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Harlem%E2%80%93148th_Street_station" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124156/https://en.wikipedia.org/wiki/Harlem%E2%80%93148th_Street_station", "kind": "wikipedia", "quote": "The station cost $1.29 million, track improvements cost $3.178 million, and signaling cost $3.553 million.", "tier": "tertiary", "title": "Harlem–148th Street station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Harlem%E2%80%93148th_Street_station" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260502150846/https://en.wikipedia.org/wiki/IRT_Lenox_Avenue_Line", "kind": "wikipedia", "quote": "The Harlem–148th Street station was opened on May 13, 1968, on land that had been part of the Lenox Yard; the station was originally called Lenox Terminal–148th Street.", "tier": "tertiary", "title": "IRT Lenox Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Lenox_Avenue_Line" } ] }, "geometryRef": "nyc-IRT Lenox Avenue Line", "id": "nyc-irt-lenox-avenue-line-19680513-2", "kind": "extension", "label": { "en": "Harlem–148th Street terminal opens (built on former Lenox Yard land)" }, "notes": "[Opening-date chase 2026-06-13] Curated date is the public/revenue opening. Trains ran without passengers in a test on May 5, 1968; official passenger opening was May 13, 1968 (both same year). NYT (May 14, 1968) confirms passengers first used the station May 13. The test-run date does not affect the curated year.", "opened": "1968-05-13", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124156/https://en.wikipedia.org/wiki/Harlem%E2%80%93148th_Street_station", "kind": "wikipedia", "quote": "Trains began operating without passengers to the 148th Street station on May 5, 1968, and the station officially opened on May 13, 1968.", "tier": "tertiary", "title": "Harlem–148th Street station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Harlem%E2%80%93148th_Street_station" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124156/https://en.wikipedia.org/wiki/Harlem%E2%80%93148th_Street_station", "kind": "wikipedia", "quote": "The station cost $1.29 million, track improvements cost $3.178 million, and signaling cost $3.553 million.", "tier": "tertiary", "title": "Harlem–148th Street station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Harlem%E2%80%93148th_Street_station" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260502150846/https://en.wikipedia.org/wiki/IRT_Lenox_Avenue_Line", "kind": "wikipedia", "quote": "The Harlem–148th Street station was opened on May 13, 1968, on land that had been part of the Lenox Yard; the station was originally called Lenox Terminal–148th Street.", "tier": "tertiary", "title": "IRT Lenox Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Lenox_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251113125656/https://erausa.org/pdf/bulletin/1980s/1985/1985-07-bulletin.pdf", "kind": "other", "publisher": "Electric Railroaders' Association (The Bulletin, vol. 28 no. 7)", "quote": "Cited at page 11 for both the May 5, 1968 passenger-free test operations and the May 13, 1968 official opening. PDF too large to retrieve directly (exceeded size limit) but citation confirmed in wikitext.", "tier": "secondary", "title": "Eighty Years of Subway Service to the Bronx", "url": "https://erausa.org/pdf/bulletin/1980s/1985/1985-07-bulletin.pdf", "via": "https://en.wikipedia.org/wiki/Harlem%E2%80%93148th_Street_station" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250126091146/https://www.nytimes.com/1968/05/14/archives/irt-passengers-get-new-148th-st-station.html", "kind": "news", "publisher": "The New York Times", "quote": "IRT Passengers Get New 148th St. Station [headline dated May 14, 1968, page 95] — reported on the opening to passengers, confirming May 13, 1968 as the public/revenue-service date.", "tier": "secondary", "title": "IRT Passengers Get New 148th St. Station", "url": "https://www.nytimes.com/1968/05/14/archives/irt-passengers-get-new-148th-st-station.html", "via": "https://en.wikipedia.org/wiki/Harlem%E2%80%93148th_Street_station" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260502150846/https://en.wikipedia.org/wiki/IRT_Lenox_Avenue_Line", "kind": "wikipedia", "quote": "The line opened south of 145th Street just after midnight on November 23, 1904, as part of the IRT's original system.", "tier": "tertiary", "title": "IRT Lenox Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Lenox_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124156/https://en.wikipedia.org/wiki/Harlem%E2%80%93148th_Street_station", "kind": "wikipedia", "quote": "Trains began operating without passengers to the 148th Street station on May 5, 1968, and the station officially opened on May 13, 1968.", "tier": "tertiary", "title": "Harlem–148th Street station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Harlem%E2%80%93148th_Street_station" } ] }, { "cityId": "nyc", "color": "#00933C", "displayNumber": "IRT Eastern Parkway Line", "id": "nyc-line-irt-eastern-parkway-line", "name": { "en": "IRT Eastern Parkway Line" }, "phases": [ { "confidence": "high", "constructionStart": "1915", "cost": { "basis": "budget", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": true, "value": 2195000, "year": 1915 }, "notes": "Per-SECTION construction-contract low bids, NOT the whole line: Cranford Co. ~$2.2M (March 1914); a Transit Company low bid of $2.195M; Inter-Continental Co. $2.7M; Rodgers & Hagerty $2.17M for the Nostrand–Buffalo Avenues contract (July 1915). The line was built as Route 12 (1915–1918) under Dual Contracts Contract 3; figures here are individual section bids, not a single line-wide total. Value entered is the $2.195M section bid as a representative sourced figure. [Citation chase 2026-06-11] Source basis is a winning low bid (authorized contract price), dated June 1914, not a forecast estimate or final outturn. The sole supporting figure traces to one Wikipedia statement whose underlying primary ref (Times Union, Brooklyn, June 16, 1914) is paywalled and could not be directly verified.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124142/https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line", "kind": "wikipedia", "quote": "At 12:40 a.m. on August 23, 1920, the Eastern Parkway Line was extended from Atlantic Avenue to Utica Avenue.", "tier": "tertiary", "title": "IRT Eastern Parkway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124142/https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line", "kind": "wikipedia", "quote": "Trains did not make stops between Atlantic Avenue and Franklin Avenue because of the failure of the contractor to perform work as scheduled on the local stations.", "tier": "tertiary", "title": "IRT Eastern Parkway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124142/https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line", "kind": "wikipedia", "quote": "The IRT Eastern Parkway Line was built as part of Route 12 from 1915 to 1918, from the section east of the Atlantic Avenue station to Utica Avenue.", "tier": "tertiary", "title": "IRT Eastern Parkway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124142/https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line", "kind": "wikipedia", "quote": "the Transit Company made a low bid of $2.195 million for this contract.", "tier": "tertiary", "title": "IRT Eastern Parkway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260201021942/https://en.wikipedia.org/wiki/Kingston_Avenue_station", "kind": "wikipedia", "quote": "which opened on August 23, 1920, as part of an extension of the IRT Eastern Parkway Line by the Interborough Rapid Transit Company", "tier": "tertiary", "title": "Kingston Avenue station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Kingston_Avenue_station" } ] }, "geometryRef": "nyc-IRT Eastern Parkway Line", "id": "nyc-irt-eastern-parkway-line-19200823-0", "kind": "initial", "label": { "en": "Initial section opens: Atlantic Avenue → Crown Heights–Utica Avenue (Franklin, Nostrand, Kingston, Utica)" }, "notes": "[Date chase 2026-06-12] A May 23, 1914 ceremonial groundbreaking (first sod) preceded actual construction by several weeks and covered only section 1A; the curated 1915 reflects the start of contracted construction (Route 12, 1915-1918). [Opening-date chase 2026-06-13] Aug 20, 1920 Mayor Hylan ride was a ceremonial pre-opening inspection; revenue service began 12:40 a.m. Aug 23, 1920 as a partial opening (Bergen St, Grand Army Plaza, and Eastern Parkway–Brooklyn Museum did not yet open due to contractor delays).", "opened": "1920-08-23", "segment": { "fromStopIndex": 0, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124142/https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line", "kind": "wikipedia", "quote": "At 12:40 a.m. on August 23, 1920, the Eastern Parkway Line was extended from Atlantic Avenue to Utica Avenue.", "tier": "tertiary", "title": "IRT Eastern Parkway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124142/https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line", "kind": "wikipedia", "quote": "Trains did not make stops between Atlantic Avenue and Franklin Avenue because of the failure of the contractor to perform work as scheduled on the local stations.", "tier": "tertiary", "title": "IRT Eastern Parkway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124142/https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line", "kind": "wikipedia", "quote": "The IRT Eastern Parkway Line was built as part of Route 12 from 1915 to 1918, from the section east of the Atlantic Avenue station to Utica Avenue.", "tier": "tertiary", "title": "IRT Eastern Parkway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124142/https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line", "kind": "wikipedia", "quote": "the Transit Company made a low bid of $2.195 million for this contract.", "tier": "tertiary", "title": "IRT Eastern Parkway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260201021942/https://en.wikipedia.org/wiki/Kingston_Avenue_station", "kind": "wikipedia", "quote": "which opened on August 23, 1920, as part of an extension of the IRT Eastern Parkway Line by the Interborough Rapid Transit Company", "tier": "tertiary", "title": "Kingston Avenue station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Kingston_Avenue_station" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20241202022735/https://www.nytimes.com/1914/05/24/archives/subway-festival-held-in-brooklyn-mccall-turns-the-first-sod-for.html", "kind": "news", "publisher": "The New York Times", "tier": "primary", "title": "Subway Festival Held in Brooklyn; McCall Turns the First Sod for Interborough Extension from Atlantic Ave.", "url": "https://www.nytimes.com/1914/05/24/archives/subway-festival-held-in-brooklyn-mccall-turns-the-first-sod-for.html", "via": "https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20230707234702/https://www.newspapers.com/article/the-brooklyn-daily-eagle-line-begun-toda/127730775/", "kind": "news", "publisher": "Brooklyn Daily Eagle", "tier": "primary", "title": "Line Begun Today Taps Big Section — The Brooklyn Daily Eagle, May 23, 1914", "url": "https://www.newspapers.com/article/the-brooklyn-daily-eagle-line-begun-toda/127730775/", "via": "https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251104164048/https://timesmachine.nytimes.com/timesmachine/1920/08/23/96895483.pdf", "kind": "news", "publisher": "New York Times", "quote": "Brooklyn Tube Extensions Open: I.R.T. Begins Service on Eastern Parkway and Nostrand Avenue Lines", "tier": "secondary", "title": "Brooklyn Tube Extensions Open: I.R.T. Begins Service on Eastern Parkway and Nostrand Avenue Lines", "url": "https://timesmachine.nytimes.com/timesmachine/1920/08/23/96895483.pdf", "via": "https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20241204194355/https://www.newspapers.com/article/new-york-tribune-new-brooklyn-subways-op/125079917/", "kind": "news", "publisher": "New-York Tribune", "quote": "New Brooklyn Subways Open (article dated August 24, 1920, reporting on the August 23 opening)", "tier": "secondary", "title": "New Brooklyn Subways Open — New-York Tribune, August 24, 1920", "url": "https://www.newspapers.com/article/new-york-tribune-new-brooklyn-subways-op/125079917/", "via": "https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251219095040/https://pudl.princeton.edu/sheetreader.php?obj=f304cf40-5610-4c05-9ee0-e56cf06d5599", "kind": "primary", "publisher": "Interborough Rapid Transit Company", "quote": "More Interborough Service for Brooklyn 2 New Lines (operator document dated August 23, 1920)", "tier": "primary", "title": "More Interborough Service for Brooklyn 2 New Lines", "url": "http://pudl.princeton.edu/sheetreader.php?obj=f304cf40-5610-4c05-9ee0-e56cf06d5599", "via": "https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line" } ], "stationCount": 4 }, { "confidence": "high", "constructionStart": "1915", "geometryRef": null, "id": "nyc-irt-eastern-parkway-line-19201010-1", "kind": "extension", "label": { "en": "Delayed local stations open: Bergen Street, Grand Army Plaza, Eastern Parkway–Brooklyn Museum" }, "notes": "[Date chase 2026-06-12] These stations share the same Dual Contracts construction as the Aug 23, 1920 phase; they opened late due to contractor underperformance, not a distinct construction start. [Opening-date chase 2026-06-13] These three local stations (Bergen Street, Grand Army Plaza, Eastern Parkway–Brooklyn Museum) were the delayed stations from the Aug 23, 1920 partial opening; they entered service Oct 10, 1920, completing the line.", "opened": "1920-10-10", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124142/https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line", "kind": "wikipedia", "quote": "On October 10, 1920, the three stations that had not opened with the rest of the line, at Bergen Street, Grand Army Plaza and Eastern Parkway–Brooklyn Museum, were opened.", "tier": "tertiary", "title": "IRT Eastern Parkway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124142/https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line", "kind": "wikipedia", "quote": "Groundbreaking for the IRT extension took place on May 23, 1914.", "tier": "tertiary", "title": "IRT Eastern Parkway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20241202022735/https://www.nytimes.com/1914/05/24/archives/subway-festival-held-in-brooklyn-mccall-turns-the-first-sod-for.html", "kind": "news", "publisher": "The New York Times", "tier": "primary", "title": "Subway Festival Held in Brooklyn; McCall Turns the First Sod for Interborough Extension from Atlantic Ave.", "url": "https://www.nytimes.com/1914/05/24/archives/subway-festival-held-in-brooklyn-mccall-turns-the-first-sod-for.html", "via": "https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20230315104008/https://timesmachine.nytimes.com/timesmachine/1920/10/11/103481051.pdf", "kind": "news", "publisher": "New York Times", "quote": "Subway Stations Opened: Last Three in Eastern Parkway Branch of I.R.T. Put Into Service (article dated October 11, 1920, reporting on October 10 opening)", "tier": "secondary", "title": "Subway Stations Opened: Last Three in Eastern Parkway Branch of I.R.T. Put Into Service", "url": "https://timesmachine.nytimes.com/timesmachine/1920/10/11/103481051.pdf", "via": "https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line" } ], "stationCount": 3 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124142/https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line", "kind": "wikipedia", "quote": "At 12:40 a.m. on August 23, 1920, the Eastern Parkway Line was extended from Atlantic Avenue to Utica Avenue.", "tier": "tertiary", "title": "IRT Eastern Parkway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260201021942/https://en.wikipedia.org/wiki/Kingston_Avenue_station", "kind": "wikipedia", "quote": "which opened on August 23, 1920, as part of an extension of the IRT Eastern Parkway Line by the Interborough Rapid Transit Company", "tier": "tertiary", "title": "Kingston Avenue station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Kingston_Avenue_station" } ] }, { "cityId": "nyc", "color": "#EE352E", "displayNumber": "IRT New Lots Line", "id": "nyc-line-irt-new-lots-line", "name": { "en": "IRT New Lots Line" }, "phases": [ { "confidence": "low", "constructionStart": "1917", "cost": { "basis": "budget", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": false, "value": 1688919, "year": 1917 }, "notes": "Cost of the two Jan 17, 1917 construction contracts for the elevated New Lots Line structure: steel to American Bridge Company ($1,431,755) + erection to W.G. Cooper ($257,164) = $1,688,919. Covers the elevated line structure, not a single segment alone. [Citation chase 2026-06-11] These are January 17, 1917 contract-award amounts (authorized/committed sums for steel supply and erection of the elevated structure), not the final outturn cost of the line. The two underlying primary newspaper citations (The Chat; Brooklyn Times Union) are paywalled and unarchived, so the figure currently rests on Wikipedia alone.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260504002751/https://en.wikipedia.org/wiki/IRT_New_Lots_Line", "kind": "wikipedia", "quote": "The first portion of the line between Utica Avenue and Junius Street opened on November 22, 1920, with shuttle trains operating over this route.", "tier": "tertiary", "title": "IRT New Lots Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_New_Lots_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260504002751/https://en.wikipedia.org/wiki/IRT_New_Lots_Line", "kind": "wikipedia", "quote": "Construction on the line began in spring 1917.", "tier": "tertiary", "title": "IRT New Lots Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_New_Lots_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260504002751/https://en.wikipedia.org/wiki/IRT_New_Lots_Line", "kind": "wikipedia", "quote": "The contract for the steel was awarded to American Bridge Company for $1,431,755, and the contract for the erection of the structure was awarded to W.G. Cooper for $257,164. ... The cost of these two contracts was $1,688,919.", "tier": "tertiary", "title": "IRT New Lots Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_New_Lots_Line" } ] }, "geometryRef": "nyc-IRT New Lots Line", "id": "nyc-irt-new-lots-line-19201122-0", "kind": "initial", "label": { "en": "Stage 1 opens: Utica Avenue → Junius Street (New Lots Line elevated, shuttle service)" }, "notes": "[Date chase 2026-06-12] Construction-start year (1917) corroborated by the contract timeline: the construction contract was awarded January 17, 1917, with groundbreaking in spring 1917. The underlying primary citations (Brooklyn Daily Eagle Sept 1917, The Chat Sept 1917, IRT Annual Report) are paywalled/blocked and were not independently accessible. [Opening-date chase 2026-06-13] Wikipedia infobox shows Nov 23, 1920 while article prose and station articles say Nov 22, 1920; curated date follows the prose/station-article consensus. Opened as shuttle service (Utica Ave to Junius St).", "opened": "1920-11-22", "segment": { "fromStopIndex": 0, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260504002751/https://en.wikipedia.org/wiki/IRT_New_Lots_Line", "kind": "wikipedia", "quote": "The first portion of the line between Utica Avenue and Junius Street opened on November 22, 1920, with shuttle trains operating over this route.", "tier": "tertiary", "title": "IRT New Lots Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_New_Lots_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260504002751/https://en.wikipedia.org/wiki/IRT_New_Lots_Line", "kind": "wikipedia", "quote": "Construction on the line began in spring 1917.", "tier": "tertiary", "title": "IRT New Lots Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_New_Lots_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260504002751/https://en.wikipedia.org/wiki/IRT_New_Lots_Line", "kind": "wikipedia", "quote": "The contract for the steel was awarded to American Bridge Company for $1,431,755, and the contract for the erection of the structure was awarded to W.G. Cooper for $257,164. ... The cost of these two contracts was $1,688,919.", "tier": "tertiary", "title": "IRT New Lots Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_New_Lots_Line" } ], "stationCount": 4 }, { "confidence": "medium", "geometryRef": "nyc-IRT New Lots Line", "id": "nyc-irt-new-lots-line-19201224-1", "kind": "extension", "label": { "en": "Stage 2 opens: Junius Street → Pennsylvania Avenue (one stop east)" }, "notes": "[Opening-date chase 2026-06-13] Initial opening was partial — only the southbound platform was in use on Dec 24, 1920 — but public revenue service to Pennsylvania Avenue began that date.", "opened": "1920-12-24", "segment": { "fromStopIndex": 4, "toStopIndex": 5 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260504002751/https://en.wikipedia.org/wiki/IRT_New_Lots_Line", "kind": "wikipedia", "quote": "The New Lots Line opened one more stop farther to the east to Pennsylvania Avenue on December 24, 1920.", "tier": "tertiary", "title": "IRT New Lots Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_New_Lots_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251222022216/https://en.wikipedia.org/wiki/Pennsylvania_Avenue_station_(IRT_New_Lots_Line)", "kind": "other", "publisher": "Wikipedia", "quote": "The line opened one more stop farther to the east to Pennsylvania Avenue on December 24, 1920. At that date, only the southbound platform was used.", "tier": "tertiary", "title": "Pennsylvania Avenue station (IRT New Lots Line) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Pennsylvania_Avenue_station_(IRT_New_Lots_Line)", "via": "https://en.wikipedia.org/wiki/IRT_New_Lots_Line" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "nyc-IRT New Lots Line", "id": "nyc-irt-new-lots-line-19221016-2", "kind": "extension", "label": { "en": "Stage 3 opens: Pennsylvania Avenue → New Lots Avenue (terminus), adding Van Siclen Avenue and New Lots Avenue" }, "notes": "[Opening-date chase 2026-06-13] Service began as a two-car shuttle on the northbound track between Pennsylvania Avenue and New Lots Avenue; this was public revenue service on the new segment.", "opened": "1922-10-16", "segment": { "fromStopIndex": 5, "toStopIndex": 7 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260504002751/https://en.wikipedia.org/wiki/IRT_New_Lots_Line", "kind": "wikipedia", "quote": "Shuttles started operating between Pennsylvania Avenue and New Lots Avenue on October 16, 1922.", "tier": "tertiary", "title": "IRT New Lots Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_New_Lots_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260110085013/https://en.wikipedia.org/wiki/New_Lots_Avenue_station_(IRT_New_Lots_Line)", "kind": "other", "publisher": "Wikipedia", "quote": "Shuttles started operating between Pennsylvania Avenue and New Lots Avenue on October 16, 1922.", "tier": "tertiary", "title": "New Lots Avenue station (IRT New Lots Line) — Wikipedia", "url": "https://en.wikipedia.org/wiki/New_Lots_Avenue_station_(IRT_New_Lots_Line)", "via": "https://en.wikipedia.org/wiki/IRT_New_Lots_Line" } ], "stationCount": 2 }, { "confidence": "low", "geometryRef": null, "id": "nyc-irt-new-lots-line-19241031-3", "kind": "extension", "label": { "en": "Through service to New Lots Avenue begins (shuttle replaced by through trains)" }, "notes": "[Opening-date chase 2026-06-13] This phase is a service-pattern change (shuttle service running since Oct 1922 replaced by through trains to New Lots Avenue), not a new station opening.", "opened": "1924-10-31", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260504002751/https://en.wikipedia.org/wiki/IRT_New_Lots_Line", "kind": "wikipedia", "quote": "On October 31, 1924, through service to New Lots Avenue was begun.", "tier": "tertiary", "title": "IRT New Lots Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_New_Lots_Line" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260504002751/https://en.wikipedia.org/wiki/IRT_New_Lots_Line", "kind": "wikipedia", "quote": "The first portion of the line between Utica Avenue and Junius Street opened on November 22, 1920, with shuttle trains operating over this route.", "tier": "tertiary", "title": "IRT New Lots Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_New_Lots_Line" } ] }, { "cityId": "nyc", "color": "#EE352E", "displayNumber": "IRT Nostrand Avenue Line", "id": "nyc-line-irt-nostrand-avenue-line", "name": { "en": "IRT Nostrand Avenue Line" }, "phases": [ { "confidence": "high", "constructionStart": "1914-05-23", "geometryRef": "nyc-IRT Nostrand Avenue Line", "id": "nyc-irt-nostrand-avenue-line-19200823-0", "kind": "initial", "label": { "en": "Line opens: Franklin Avenue → Flatbush Avenue (full Nostrand Avenue Line, Dual Contracts Route 12)" }, "notes": "Construction-start corrected 1913→1914-05-23 [Date chase 2026-06-12 — panel-confirmed, corrected w/ sign-off] [Date chase 2026-06-12] Groundbreaking for the Route 12 IRT extension (incl. Nostrand Ave branch) took place May 23, 1914, with actual work beginning several weeks later; the Nostrand Avenue section itself was under excavation by 1915 (bids opened April 1915). The prior 1913 value was the Dual Contracts signing date, not construction commencement. Primary NYT/Brooklyn Daily Eagle sources are paywalled and confirmed only via Wikipedia citation. [Opening-date chase 2026-06-13] Mayor Hylan inspected the line on Aug 20, 1920, three days before the Aug 23 public opening — this was a pre-opening inspection, not revenue service. The Nostrand Avenue Line opened fully on Aug 23, 1920 with all seven of its stations (note: three Eastern Parkway Line stations opened later on Oct 10, 1920, but these are not on the Nostrand Avenue Line).", "opened": "1920-08-23", "segment": { "fromStopIndex": 0, "toStopIndex": 7 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260509142528/https://en.wikipedia.org/wiki/IRT_Nostrand_Avenue_Line", "kind": "wikipedia", "quote": "The Nostrand Avenue Line opened on August 23, 1920 at 12:40 a.m.", "tier": "tertiary", "title": "IRT Nostrand Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Nostrand_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260509142528/https://en.wikipedia.org/wiki/IRT_Nostrand_Avenue_Line", "kind": "wikipedia", "quote": "The Dual Contracts, which were signed on March 19, 1913, were contracts for the construction and/or rehabilitation and operation of rapid transit lines in the City of New York.", "tier": "tertiary", "title": "IRT Nostrand Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Nostrand_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124142/https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line", "kind": "wikipedia", "quote": "At 12:40 a.m. on August 23, 1920, the Eastern Parkway Line was extended from Atlantic Avenue to Utica Avenue ... and down the Nostrand Avenue Subway to Flatbush Avenue.", "tier": "tertiary", "title": "IRT Eastern Parkway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20241202022735/https://www.nytimes.com/1914/05/24/archives/subway-festival-held-in-brooklyn-mccall-turns-the-first-sod-for.html", "kind": "news", "publisher": "The New York Times", "quote": "[Title only; article body inaccessible — nytimes.com blocked WebFetch] Cited in Wikipedia as the source for the May 23, 1914 groundbreaking ceremony.", "tier": "primary", "title": "Subway Festival Held in Brooklyn; McCall Turns the First Sod for Interborough Extension from Atlantic Ave.", "url": "https://www.nytimes.com/1914/05/24/archives/subway-festival-held-in-brooklyn-mccall-turns-the-first-sod-for.html", "via": "https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20230707234702/https://www.newspapers.com/article/the-brooklyn-daily-eagle-line-begun-toda/127730775/", "kind": "news", "publisher": "The Brooklyn Daily Eagle", "quote": "[Article body inaccessible — newspapers.com returned HTTP 403] Dated May 23, 1914; cited in Wikipedia as a source for the groundbreaking and the Cranford Company's $2.2 million construction contract for section 1A.", "tier": "primary", "title": "Line Begun Today Taps Big Section", "url": "https://www.newspapers.com/article/the-brooklyn-daily-eagle-line-begun-toda/127730775/", "via": "https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20230707222011/https://www.newspapers.com/article/the-brooklyn-daily-eagle-bids-opened-for/127732139/", "kind": "news", "publisher": "The Brooklyn Daily Eagle", "quote": "[Article body inaccessible — newspapers.com returned HTTP 403] Dated April 20, 1915; cited in Wikipedia for the April 1915 bid opening for the section between Grand Army Plaza and Nostrand Avenue.", "tier": "primary", "title": "Bids Opened for Parkway Subway", "url": "https://www.newspapers.com/article/the-brooklyn-daily-eagle-bids-opened-for/127732139/", "via": "https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251104164048/https://timesmachine.nytimes.com/timesmachine/1920/08/23/96895483.pdf", "kind": "news", "publisher": "New York Times", "quote": "Brooklyn Tube Extensions Open: I.R.T. Begins Service on Eastern Parkway and Nostrand Avenue Lines [dated August 23, 1920; article body inaccessible — timesmachine.nytimes.com blocked WebFetch, but title and date confirm August 23, 1920 revenue service opening]", "tier": "primary", "title": "Brooklyn Tube Extensions Open: I.R.T. Begins Service on Eastern Parkway and Nostrand Avenue Lines", "url": "https://timesmachine.nytimes.com/timesmachine/1920/08/23/96895483.pdf", "via": "https://en.wikipedia.org/wiki/IRT_Nostrand_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20241204194355/https://www.newspapers.com/article/new-york-tribune-new-brooklyn-subways-op/125079917/", "kind": "news", "publisher": "New-York Tribune", "quote": "[Article body inaccessible — newspapers.com returned HTTP 403] Dated August 24, 1920; cited in Wikipedia Eastern Parkway Line article for the 12:40 a.m. August 23, 1920 opening of the new Brooklyn IRT lines.", "tier": "secondary", "title": "New Brooklyn Subways Open", "url": "https://www.newspapers.com/article/new-york-tribune-new-brooklyn-subways-op/125079917/", "via": "https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line" } ], "stationCount": 7 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260509142528/https://en.wikipedia.org/wiki/IRT_Nostrand_Avenue_Line", "kind": "wikipedia", "quote": "The Nostrand Avenue Line opened on August 23, 1920 at 12:40 a.m.", "tier": "tertiary", "title": "IRT Nostrand Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Nostrand_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124142/https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line", "kind": "wikipedia", "quote": "At 12:40 a.m. on August 23, 1920, the Eastern Parkway Line was extended from Atlantic Avenue to Utica Avenue ... and down the Nostrand Avenue Subway to Flatbush Avenue.", "tier": "tertiary", "title": "IRT Eastern Parkway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IRT_Eastern_Parkway_Line" } ] }, { "cityId": "nyc", "color": "#0039A6", "displayNumber": "IND Eighth Avenue Line", "id": "nyc-line-ind-eighth-avenue-line", "name": { "en": "IND Eighth Avenue Line" }, "phases": [ { "confidence": "high", "constructionStart": "1925", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "USD", "isEstimate": false, "value": 191200000, "year": 1932 }, "notes": "Figure given as the cost of building the whole Eighth Avenue Line (Chambers St/Hudson Terminal–207th St trunk plus its branches), not this single staged opening alone; English Wikipedia equates it to ~$4,511.9 million in 2025 dollars. Ground was broken on 14 March 1925 at St. Nicholas Avenue and 123rd Street. [Citation chase 2026-06-11] The $191.2M (1932 USD) figure traces to a contemporary New York Times report (R.L. Duffus, Sept 9, 1932) whose title states \"Cost Has Been $191,200,000\"; on Wikipedia the cost sentence actually appears in the IND station-level articles (e.g., 116th Street), not the main line article whose URL is cited here.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124132/https://en.wikipedia.org/wiki/IND_Eighth_Avenue_Line", "kind": "wikipedia", "quote": "the majority of the Eighth Avenue Line, from Chambers Street north to 207th Street, was opened to the public just after midnight on September 10, 1932", "tier": "tertiary", "title": "IND Eighth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Eighth_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260530130346/https://en.wikipedia.org/wiki/Chambers_Street%E2%80%93World_Trade_Center/Park_Place/Cortlandt_Street_station", "kind": "wikipedia", "quote": "The Chambers Street and Hudson Terminal stations on the Eighth Avenue Line opened just after midnight on September 10, 1932, as the southern terminus of the city-operated IND's initial segment, the Eighth Avenue Line between Chambers Street–Hudson Terminal and 207th Street.", "tier": "tertiary", "title": "Chambers Street–World Trade Center/Park Place/Cortlandt Street station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Chambers_Street%E2%80%93World_Trade_Center/Park_Place/Cortlandt_Street_station" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124132/https://en.wikipedia.org/wiki/IND_Eighth_Avenue_Line", "kind": "wikipedia", "quote": "Construction of the whole line cost $191.2 million", "tier": "tertiary", "title": "IND Eighth Avenue Line — Wikipedia (construction cost)", "url": "https://en.wikipedia.org/wiki/IND_Eighth_Avenue_Line" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20251107122724/https://www.nytimes.com/1932/09/09/archives/new-line-first-unit-in-citywide-system-8th-av-tube-to-ease-west.html", "kind": "news", "publisher": "The New York Times", "quote": "Cost Has Been $191,200,000 [from article title; body inaccessible]", "tier": "secondary", "title": "New Line First Unit In City-Wide System; 8th Av. Tube to Ease West Side Congestion at Once — Cost Has Been $191,200,000", "url": "https://www.nytimes.com/1932/09/09/archives/new-line-first-unit-in-citywide-system-8th-av-tube-to-ease-west.html", "via": "https://en.wikipedia.org/wiki/116th_Street_station_(IND_Eighth_Avenue_Line)" } ] }, "geometryRef": "nyc-IND Eighth Avenue Line", "id": "nyc-ind-eighth-avenue-line-19320910-0", "kind": "initial", "label": { "en": "Stage 1 opens: Chambers Street–Hudson Terminal → 207th Street (IND first system trunk)" }, "notes": "[Date chase 2026-06-12] Groundbreaking ceremony held March 14, 1925 at St. Nicholas Ave & W 123rd St (per NYT 1925-03-14); actual excavation began April 3, 1925 at St. Nicholas Ave & W 128th St (per nycsubway.org). Both confirm the curated 1925 construction start. [Opening-date chase 2026-06-13] Opening was revenue service (no separate ceremonial first run); three prior days of test running without passengers per Wikipedia.", "opened": "1932-09-10", "segment": { "fromStopIndex": 0, "toStopIndex": 27 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124132/https://en.wikipedia.org/wiki/IND_Eighth_Avenue_Line", "kind": "wikipedia", "quote": "the majority of the Eighth Avenue Line, from Chambers Street north to 207th Street, was opened to the public just after midnight on September 10, 1932", "tier": "tertiary", "title": "IND Eighth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Eighth_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260530130346/https://en.wikipedia.org/wiki/Chambers_Street%E2%80%93World_Trade_Center/Park_Place/Cortlandt_Street_station", "kind": "wikipedia", "quote": "The Chambers Street and Hudson Terminal stations on the Eighth Avenue Line opened just after midnight on September 10, 1932, as the southern terminus of the city-operated IND's initial segment, the Eighth Avenue Line between Chambers Street–Hudson Terminal and 207th Street.", "tier": "tertiary", "title": "Chambers Street–World Trade Center/Park Place/Cortlandt Street station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Chambers_Street%E2%80%93World_Trade_Center/Park_Place/Cortlandt_Street_station" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124132/https://en.wikipedia.org/wiki/IND_Eighth_Avenue_Line", "kind": "wikipedia", "quote": "Construction of the whole line cost $191.2 million", "tier": "tertiary", "title": "IND Eighth Avenue Line — Wikipedia (construction cost)", "url": "https://en.wikipedia.org/wiki/IND_Eighth_Avenue_Line" }, { "accessedAt": "2026-06-12", "kind": "news", "publisher": "The New York Times", "quote": "Will Break Ground Today for New Uptown Subway [headline, March 14, 1925]", "tier": "primary", "title": "Will Break Ground Today for New Uptown Subway", "url": "https://www.nytimes.com/1925/03/14/archives/englandaustralia-air-route-via-america-seen-in-3-years.html", "via": "https://en.wikipedia.org/wiki/IND_Eighth_Avenue_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260613162715/https://www.nycsubway.org/wiki/History_of_the_Independent_Subway", "kind": "other", "publisher": "nycsubway.org", "quote": "On Saturday, March 14th, 1925, an official groundbreaking ceremony took place at St. Nicholas Avenue and West 123rd Street. Thursday, April 3rd, 1925 marked the real groundbreaking at St. Nicholas Avenue and West 128th St, where actual construction began.", "tier": "tertiary", "title": "History of the Independent Subway — nycsubway.org", "url": "http://www.nycsubway.org/wiki/History_of_the_Independent_Subway", "via": "https://en.wikipedia.org/wiki/Independent_Subway_System" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20140313143351/http://select.nytimes.com/gst/abstract.html?res=FA0D13F7395513738DDDA90994D1405B828FF1D3", "kind": "news", "publisher": "The New York Times", "quote": "Gay Midnight Crowd Rides First Trains in New Subway [September 10, 1932, page 1 — cited in Wikipedia wikitext as ref name='Chambers'; direct access blocked by NYT paywall]", "tier": "secondary", "title": "Gay Midnight Crowd Rides First Trains in New Subway", "url": "https://select.nytimes.com/gst/abstract.html?res=FA0D13F7395513738DDDA90994D1405B828FF1D3", "via": "https://en.wikipedia.org/wiki/IND_Eighth_Avenue_Line" } ], "stationCount": 19 }, { "confidence": "high", "geometryRef": "nyc-IND Eighth Avenue Line", "id": "nyc-ind-eighth-avenue-line-19330201-1", "kind": "extension", "label": { "en": "Brooklyn extension opens: Chambers Street → Jay Street–Borough Hall via the Cranberry Street Tunnel (plus Broadway–Nassau Street/Fulton St station)" }, "notes": "[Opening-date chase 2026-06-13] High Street station was intentionally excluded from this opening (trains passed through without stopping) because its escalators were not yet complete; it opened separately on 1933-06-24.", "opened": "1933-02-01", "segment": { "fromStopIndex": 27, "toStopIndex": 28 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124132/https://en.wikipedia.org/wiki/IND_Eighth_Avenue_Line", "kind": "wikipedia", "quote": "The Cranberry Street Tunnel, extending the express tracks east under Fulton Street to Jay Street–Borough Hall in Brooklyn, was opened for the morning rush hour on February 1, 1933", "tier": "tertiary", "title": "IND Eighth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Eighth_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260601044839/https://en.wikipedia.org/wiki/Fulton_Street_station_(New_York_City_Subway)", "kind": "wikipedia", "quote": "the Broadway–Nassau Street station ... was the latest in the complex to be completed, opening on February 1, 1933", "tier": "tertiary", "title": "Fulton Street station (New York City Subway) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Fulton_Street_station_(New_York_City_Subway)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613162715/https://timesmachine.nytimes.com/timesmachine/1933/02/01/105382841.pdf", "kind": "news", "publisher": "The New York Times", "quote": "City Opens Subway to Brooklyn Today: Regular Express Service on the Extension of Independent Line Starts at 6:05 A.M. [February 1, 1933, page 19 — cited in Wikipedia wikitext as ref name='Jay'; paywall/archive access blocked]", "tier": "secondary", "title": "City Opens Subway to Brooklyn Today: Regular Express Service on the Extension of Independent Line Starts at 6:05 A.M.", "url": "https://timesmachine.nytimes.com/timesmachine/1933/02/01/105382841.pdf", "via": "https://en.wikipedia.org/wiki/High_Street_station_(IND_Eighth_Avenue_Line)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250829020639/https://www.nytimes.com/1933/01/29/archives/new-subway-link-opens-wednesday-independent-line-will-offer-express.html", "kind": "news", "publisher": "The New York Times", "quote": "New Subway Link Opens Wednesday [January 29, 1933 — advance notice article confirming February 1 as the planned opening date; access blocked by paywall]", "tier": "secondary", "title": "New Subway Link Opens Wednesday: Independent Line Will Offer Express Service to Borough Hall in Brooklyn", "url": "https://www.nytimes.com/1933/01/29/archives/new-subway-link-opens-wednesday-independent-line-will-offer-express.html", "via": "https://en.wikipedia.org/wiki/IND_Eighth_Avenue_Line" } ], "stationCount": 2 }, { "confidence": "medium", "geometryRef": "nyc-IND Eighth Avenue Line", "id": "nyc-ind-eighth-avenue-line-19330624-2", "kind": "extension", "label": { "en": "Infill station opens: High Street (on the Brooklyn / Cranberry Street Tunnel extension)" }, "notes": "[Opening-date chase 2026-06-13] Infill opening of High Street station, delayed ~5 months from the Feb 1 1933 extension because its escalators (needed for the station's ~70-foot depth) were incomplete; public revenue-service opening, no ceremonial distinction noted.", "opened": "1933-06-24", "segment": { "fromStopIndex": 28, "toStopIndex": 29 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124132/https://en.wikipedia.org/wiki/IND_Eighth_Avenue_Line", "kind": "wikipedia", "quote": "High Street, which opened on June 24, 1933", "tier": "tertiary", "title": "IND Eighth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Eighth_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613162806/https://timesmachine.nytimes.com/timesmachine/1933/06/25/105395482.html?pdf_redirect=true&site=false", "kind": "news", "publisher": "The New York Times", "quote": "High St. Station, Brooklyn, Opened [June 25, 1933 article reporting on opening that occurred June 24, 1933; cited in Wikipedia wikitext as ref name='NYTimes-INDHighSt-June1933'; paywall/archive access blocked]", "tier": "secondary", "title": "Jobs Are All Filled on Subway Links – Board Reports Thousands Already Listed – High St. Station, Brooklyn, Opened", "url": "https://timesmachine.nytimes.com/timesmachine/1933/06/25/105395482.pdf", "via": "https://en.wikipedia.org/wiki/High_Street_station_(IND_Eighth_Avenue_Line)" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124132/https://en.wikipedia.org/wiki/IND_Eighth_Avenue_Line", "kind": "wikipedia", "quote": "the majority of the Eighth Avenue Line, from Chambers Street north to 207th Street, was opened to the public just after midnight on September 10, 1932", "tier": "tertiary", "title": "IND Eighth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Eighth_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260530130346/https://en.wikipedia.org/wiki/Chambers_Street%E2%80%93World_Trade_Center/Park_Place/Cortlandt_Street_station", "kind": "wikipedia", "quote": "The Chambers Street and Hudson Terminal stations on the Eighth Avenue Line opened just after midnight on September 10, 1932, as the southern terminus of the city-operated IND's initial segment, the Eighth Avenue Line between Chambers Street–Hudson Terminal and 207th Street.", "tier": "tertiary", "title": "Chambers Street–World Trade Center/Park Place/Cortlandt Street station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Chambers_Street%E2%80%93World_Trade_Center/Park_Place/Cortlandt_Street_station" } ] }, { "cityId": "nyc", "color": "#FF6319", "displayNumber": "IND Sixth Avenue Line", "id": "nyc-line-ind-sixth-avenue-line", "name": { "en": "IND Sixth Avenue Line" }, "phases": [ { "confidence": "medium", "constructionStart": "1929", "geometryRef": "nyc-IND Sixth Avenue Line", "id": "nyc-ind-sixth-avenue-line-19360101-0", "kind": "initial", "label": { "en": "Houston & Essex Street Line opens: West Fourth Street junction → East Broadway (temporary terminal)" }, "notes": "Contract awarded to Corson Construction January 1929; construction officially began May 1929. Two local tracks from a junction with the Eighth Avenue Line east under Houston Street, south under Essex Street to a temporary terminal at East Broadway. E trains shifted to terminate at East Broadway. [Date chase 2026-06-12] Construction officially started May 1929 (contract awarded to Corson Construction Jan 1929); NYT groundbreaking source May 2, 1929 is paywalled.", "opened": "1936-01-01", "segment": { "fromStopIndex": 3, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260106141837/https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line", "kind": "wikipedia", "quote": "The Houston and Essex Street Line began operations at noon on January 1, 1936, with two local tracks from a junction with the Eighth Avenue Line south of West Fourth Street–Washington Square east under Houston Street and south under Essex Street to a temporary terminal at East Broadway.", "tier": "tertiary", "title": "IND Sixth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251006003128/https://www.nytimes.com/1936/01/02/archives/la-guardia-opens-new-subway-link-warmly-praises-delaney-as-he-puts.html", "kind": "news", "publisher": "The New York Times", "quote": "Title references LaGuardia opening; article date January 2, 1936 reporting on January 1 opening. Wikipedia cites this as ref 'East Broadway' directly supporting 'began operations at noon on January 1, 1936.'", "tier": "secondary", "title": "LaGuardia Opens New Subway Link", "url": "https://www.nytimes.com/1936/01/02/archives/la-guardia-opens-new-subway-link-warmly-praises-delaney-as-he-puts.html", "via": "https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line" } ] }, { "confidence": "medium", "constructionStart": "1930", "geometryRef": null, "id": "nyc-ind-sixth-avenue-line-19360409-1", "kind": "extension", "label": { "en": "Rutgers Street Tunnel opens: East Broadway → Culver Line (under East River to Brooklyn, junction north of Jay Street–Borough Hall)" }, "notes": "Rutgers Street Tunnel contract awarded May 1930. Service began just after midnight, connecting the Houston-Essex Street Line under the East River to the north end of the Culver Line at a junction with the Eighth Avenue Line north of Jay Street–Borough Hall. Adds York Street station on the Manhattan/Brooklyn approach. [Date chase 2026-06-12] Rutgers Street Tunnel contract awarded May 1930 (NYT May 22, 1930); no explicit groundbreaking date found, so 1930 is supported via contract-award month. [Opening-date chase 2026-06-13] Revenue service began just after midnight on April 9, 1936 (public opening, not ceremonial).", "opened": "1936-04-09", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260106141837/https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line", "kind": "wikipedia", "quote": "Just after midnight on April 9, 1936, trains began running under the East River via the Rutgers Street Tunnel, which connected the Houston-Essex Street Line with the north end of the Culver Line at a junction with the Eighth Avenue Line north of Jay Street–Borough Hall.", "tier": "tertiary", "title": "IND Sixth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250616044219/https://www.nytimes.com/1936/04/06/archives/two-subway-links-start-wednesday-city-will-begin-operating-fulton.html", "kind": "news", "publisher": "The New York Times", "quote": "Advance article (April 6, 1936) reporting that the Rutgers Street Tunnel link starts Wednesday (April 9). Wikipedia cites this as ref 'Rutgers' to support the April 9, 1936 opening.", "tier": "secondary", "title": "Two Subway Links Start Wednesday", "url": "https://www.nytimes.com/1936/04/06/archives/two-subway-links-start-wednesday-city-will-begin-operating-fulton.html", "via": "https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line" } ] }, { "confidence": "medium", "constructionStart": "1936", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "USD", "isEstimate": false, "value": 59500000, "year": 1940 }, "notes": "Wikipedia states the construction of the Sixth Avenue Line cost $59.5 million. Figure represents the cost of the Sixth Avenue subway (Midtown trunk) project. Mayor La Guardia broke ground at Bryant Park on March 23, 1936; multiple section contracts awarded Oct 1935–Jun 1937. New stations: West Fourth Street (lower level), 34th Street–Herald Square, 42nd Street–Bryant Park, 47th–50th Streets–Rockefeller Center. [Citation chase 2026-06-11] The $59,500,000 figure is the actual (outturn) construction cost in nominal 1940 USD, reported by The New York Times on opening day (Dec 15, 1940; headline \"WORK COST $59,500,000\"), and covers the ~2-mile Midtown trunk (West Fourth Street to 47th–50th Streets).", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260106141837/https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line", "kind": "wikipedia", "quote": "On December 15, 1940, local subway service began on Sixth Avenue from the West Fourth Street subway station to the 47th–50th Streets station with track connections to the IND 53rd Street Line. The construction of the Sixth Avenue Line cost $59.5 million.", "tier": "tertiary", "title": "IND Sixth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20251002092503/https://www.nytimes.com/1940/12/15/archives/new-subway-line-on-6th-ave-opens-at-midnight-fete-mayor-and-2000.html", "kind": "news", "publisher": "The New York Times", "quote": "The Sixth Avenue subway, built at a cost of $59,500,000, began regular passenger operation at 12:01 A.M.", "tier": "primary", "title": "New Subway Line on 6th Ave. Opens at Midnight Fete", "url": "https://www.nytimes.com/1940/12/15/archives/new-subway-line-on-6th-ave-opens-at-midnight-fete-mayor-and-2000.html", "via": "https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line" } ] }, "geometryRef": "nyc-IND Sixth Avenue Line", "id": "nyc-ind-sixth-avenue-line-19401215-2", "kind": "extension", "label": { "en": "Midtown trunk opens: West Fourth Street → 47th–50th Streets (Sixth Avenue main line)" }, "notes": "Local service began on Sixth Avenue from West Fourth Street to the 47th–50th Streets station with track connections to the IND 53rd Street Line. Required underpinning the Sixth Avenue Elevated and threading between the H&M tubes and the Catskill Aqueduct. [Date chase 2026-06-12] Midtown Sixth Avenue subway groundbreaking by La Guardia at Bryant Park on March 23, 1936 (earlier 40th-47th St contracts let Oct 1935).", "opened": "1940-12-15", "segment": { "fromStopIndex": 0, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260106141837/https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line", "kind": "wikipedia", "quote": "On December 15, 1940, local subway service began on Sixth Avenue from the West Fourth Street subway station to the 47th–50th Streets station with track connections to the IND 53rd Street Line. The construction of the Sixth Avenue Line cost $59.5 million.", "tier": "tertiary", "title": "IND Sixth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251002092503/https://www.nytimes.com/1940/12/15/archives/new-subway-line-on-6th-ave-opens-at-midnight-fete-mayor-and-2000.html", "kind": "news", "publisher": "The New York Times", "quote": "Title confirms midnight opening on 6th Ave. (December 15, 1940). Wikipedia cites this as ref 'The New York Times 1940' for the December 15, 1940 opening.", "tier": "secondary", "title": "New Subway Line on 6th Ave. Opens at Midnight Fete", "url": "https://www.nytimes.com/1940/12/15/archives/new-subway-line-on-6th-ave-opens-at-midnight-fete-mayor-and-2000.html", "via": "https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line" } ], "stationCount": 4 }, { "confidence": "medium", "constructionStart": "1961", "cost": { "basis": "estimate", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": true, "value": 22000000, "year": 1961 }, "notes": "Cost cited for the $22 million project to build two express tracks between West Fourth Street and 34th Street–Herald Square; this covers the express-track project, not the full Chrystie Street Connection. Price-level reflects the 1961 groundbreaking/contract estimate. [Citation chase 2026-06-11] The $22M figure is corroborated by the NYT (Levey, Apr 19, 1961) headline/metadata (\"1964 Finish Set for $22,000,000 Job\"), confirming it as the 1961 groundbreaking projection; the article body is paywalled and the NYCTA groundbreaking brochure (thejoekorner.com) is offline/image-only, so it remains unverifiable.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260106141837/https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line", "kind": "wikipedia", "quote": "On April 19, 1961, ground was broken for a $22 million project to build two express tracks between the West Fourth Street and 34th Street–Herald Square stations.", "tier": "tertiary", "title": "IND Sixth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260106141837/https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line", "kind": "wikipedia", "quote": "On November 26, 1967, the first part of the Chrystie Street Connection opened and Sixth Avenue Line express tracks opened from 34th Street–Herald Square to West Fourth Street–Washington Square.", "tier": "tertiary", "title": "IND Sixth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20250830061715/https://www.nytimes.com/1961/04/19/archives/construction-of-new-ind-tunnel-for-6th-ave-line-begins-today.html", "kind": "news", "publisher": "The New York Times", "quote": "1964 Finish Set for $22,000,000 Job; work to start on $22-million deep-level express' tunnel for 6th Av IND, W 4th-34th Sts", "tier": "secondary", "title": "Construction of New IND Tunnel For 6th Ave. Line Begins Today; Express Tracks Deep Under Street to Run From 4th to 34th St. – 1964 Finish Set for $22,000,000 Job", "url": "https://www.nytimes.com/1961/04/19/archives/construction-of-new-ind-tunnel-for-6th-ave-line-begins-today.html", "via": "https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line" }, { "accessedAt": "2026-06-11", "kind": "news", "publisher": "The New York Times (via Wayback Machine)", "quote": "1964 Finish Set for $22,000,000 Job; description: work to start on $22-million deep-level express' tunnel for 6th Av IND, W 4th-34th Sts", "tier": "secondary", "title": "Construction of New IND Tunnel For 6th Ave. Line Begins Today; Express Tracks Deep Under Street to Run From 4th to 34th St. – 1964 Finish Set for $22,000,000 Job", "url": "http://web.archive.org/web/20250830061715/https://www.nytimes.com/1961/04/19/archives/construction-of-new-ind-tunnel-for-6th-ave-line-begins-today.html", "via": "https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line" } ] }, "geometryRef": "nyc-IND Sixth Avenue Line", "id": "nyc-ind-sixth-avenue-line-19671126-3", "kind": "extension", "label": { "en": "Express tracks + Chrystie Street Connection (phase 1) open: West Fourth Street → 34th Street–Herald Square express, connection to Manhattan Bridge" }, "notes": "Ground broken April 19, 1961. The first part of the Chrystie Street Connection opened along with the Sixth Avenue express tracks. No new stations added (express tracks parallel existing stations); connection routed B/D services to the BMT southern division via the Manhattan Bridge. [Date chase 2026-06-12] Ground broken April 19, 1961 for the $22M express-tracks project (NYT 'Construction of New IND Tunnel For 6th Ave. Line Begins Today', Apr 19, 1961).", "opened": "1967-11-26", "segment": { "fromStopIndex": 4, "toStopIndex": 7 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260106141837/https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line", "kind": "wikipedia", "quote": "On April 19, 1961, ground was broken for a $22 million project to build two express tracks between the West Fourth Street and 34th Street–Herald Square stations.", "tier": "tertiary", "title": "IND Sixth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260106141837/https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line", "kind": "wikipedia", "quote": "On November 26, 1967, the first part of the Chrystie Street Connection opened and Sixth Avenue Line express tracks opened from 34th Street–Herald Square to West Fourth Street–Washington Square.", "tier": "tertiary", "title": "IND Sixth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613162811/https://timesmachine.nytimes.com/timesmachine/1967/11/16/90418352.html?pdf_redirect=true&site=false", "kind": "news", "publisher": "The New York Times", "quote": "Advance article (November 16, 1967) confirming service changes will take effect November 26, 1967. Wikipedia cites as ref 'NYTimes-ChrystieStChanges-1967.'", "tier": "secondary", "title": "Subway Changes to Speed Service: Major Alterations in Maps, Routes and Signs Will Take Effect Nov. 26", "url": "https://timesmachine.nytimes.com/timesmachine/1967/11/16/90418352.pdf", "via": "https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line" } ] }, { "confidence": "medium", "geometryRef": null, "id": "nyc-ind-sixth-avenue-line-19680701-4", "kind": "extension", "label": { "en": "57th Street station + Chrystie Street Connection (phase 2) open: connection to Williamsburg Bridge" }, "notes": "The 57th Street station and the portion of the Chrystie Street Connection linking the line to the Williamsburg Bridge opened. New station: 57th Street (northern terminus stub). [Opening-date chase 2026-06-13] Revenue/public service began July 1, 1968 (NYT 'Skip-Stop Subway Begins Run Today'). The June 27, 1968 platform luncheon was a ceremonial pre-opening event, not the public opening.", "opened": "1968-07-01", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260106141837/https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line", "kind": "wikipedia", "quote": "On July 1, 1968, the 57th Street station and the portion of the Chrystie Street Connection connecting the line with the Williamsburg Bridge opened.", "tier": "tertiary", "title": "IND Sixth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line" }, { "accessedAt": "2026-06-13", "kind": "news", "publisher": "The New York Times", "quote": "Article dated July 1, 1968 ('Run Today') confirming revenue-service start of KK/Williamsburg Bridge connection. Wikipedia cites as ref 'Hofmann 1968.'", "tier": "secondary", "title": "Skip-Stop Subway Begins Run Today – KK Line Links 3 Boroughs – Other Routes Changed", "url": "https://query.nytimes.com/gst/abstract.html?res=9E07E6DD1131E034BC4953DFB1668383679EDE&legacy=true", "via": "https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": null, "id": "nyc-ind-sixth-avenue-line-198910-5", "kind": "extension", "label": { "en": "IND 63rd Street Line connection opens at 57th Street stub (to 21st Street–Queensbridge)" }, "notes": "The stub-end tracks beyond 57th Street were connected to the IND 63rd Street Line when the latter opened in October 1989 (initial segment to 21st Street–Queensbridge). This was an extension off the Sixth Avenue trunk; new stations are on the 63rd Street Line proper. [Opening-date chase 2026-06-13] Exact opening date is October 29, 1989 (IND 63rd Street Line opening); curated month-only date can be refined to 1989-10-29.", "opened": "1989-10", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260106141837/https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line", "kind": "wikipedia", "quote": "The stub-end tracks were eventually connected to the IND 63rd Street Line when the latter opened in October 1989.", "tier": "tertiary", "title": "IND Sixth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250812052122/https://www.nytimes.com/1989/10/29/nyregion/the-subway-to-nowhere-now-goes-somewhere.html", "kind": "news", "publisher": "The New York Times", "quote": "Article dated October 29, 1989, reporting on the IND 63rd Street Line opening. Wikipedia cites this directly in the passage about the October 1989 opening.", "tier": "secondary", "title": "The 'Subway to Nowhere' Now Goes Somewhere", "url": "https://www.nytimes.com/1989/10/29/nyregion/the-subway-to-nowhere-now-goes-somewhere.html", "via": "https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line" } ] }, { "confidence": "medium", "geometryRef": null, "id": "nyc-ind-sixth-avenue-line-20011216-6", "kind": "extension", "label": { "en": "63rd Street Connector to Queens Boulevard Line comes into regular use" }, "notes": "The 63rd Street Connector (linking the 63rd Street Line to the Queens Boulevard Line) came into regular use, enabling new V service operating via the Sixth Avenue Line. Affects routing/through-service rather than adding stations on the Sixth Avenue trunk itself. [Opening-date chase 2026-06-13] 63rd Street Connector first regular use was Dec 16, 2001 (F-train rerouting); the new V train began Dec 17, 2001.", "opened": "2001-12-16", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260106141837/https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line", "kind": "wikipedia", "quote": "The Connector came into regular use on December 16, 2001.", "tier": "tertiary", "title": "IND Sixth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251006003126/https://www.nytimes.com/2001/12/17/nyregion/v-train-begins-service-today-giving-queens-commuters-another-option.html", "kind": "news", "publisher": "The New York Times", "quote": "Article dated December 17, 2001, reporting the V train 'Begins Service Today.' The V train debuted December 17; the Connector itself came into use December 16 via F train rerouting. Supports the December 2001 timeframe but the V train specifically started December 17.", "tier": "secondary", "title": "V Train Begins Service Today, Giving Queens Commuters Another Option", "url": "https://www.nytimes.com/2001/12/17/nyregion/v-train-begins-service-today-giving-queens-commuters-another-option.html", "via": "https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260106141837/https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line", "kind": "wikipedia", "quote": "The Houston and Essex Street Line began operations at noon on January 1, 1936, with two local tracks from a junction with the Eighth Avenue Line south of West Fourth Street–Washington Square east under Houston Street and south under Essex Street to a temporary terminal at East Broadway.", "tier": "tertiary", "title": "IND Sixth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Sixth_Avenue_Line" } ] }, { "cityId": "nyc", "color": "#00ADD0", "displayNumber": "IND Second Avenue Line", "id": "nyc-line-ind-second-avenue-line", "name": { "en": "IND Second Avenue Line" }, "phases": [ { "confidence": "high", "constructionStart": "2007", "cost": { "basis": "budget", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": false, "value": 4450000000, "year": 2017 }, "notes": "Final outturn cost of Phase 1 (three new stations plus two miles of tunnel). Construction first began under the 1960s/70s Program for Action — tunnel segments were bored at 99th-105th St (Oct 1972), 110th-120th St (Mar 1973), Canal St (Oct 1973) and 2nd-9th St (Jul 1974) before a stop-work order in Sept 1975; the 99th-105th St segment was incorporated into modern Phase 1. Modern Phase 1 ceremonial groundbreaking was 12 Apr 2007 with actual construction (utility relocation) starting 23 Apr 2007. [Citation chase 2026-06-11] The $4.45B figure is corroborated by contemporary sources (Mass Transit Magazine, Aug 2016; CBS News, Sept 2015) but these are pre-opening budget projections; no post-opening MTA outturn certification was located, so this is best understood as the authorized/budgeted figure that the project tracked to (Phase 1 opened on time and on budget).", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260525233856/https://en.wikipedia.org/wiki/Construction_of_the_Second_Avenue_Subway", "kind": "wikipedia", "quote": "The first phase of the line, consisting of three newly built stations and two miles (3.2 km) of tunnel, cost $4.45 billion.", "tier": "tertiary", "title": "Construction of the Second Avenue Subway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Construction_of_the_Second_Avenue_Subway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260525233856/https://en.wikipedia.org/wiki/Construction_of_the_Second_Avenue_Subway", "kind": "wikipedia", "quote": "Actual construction work began on April 23, 2007, with the relocation of utility pipes, wires, and other infrastructure.", "tier": "tertiary", "title": "Construction of the Second Avenue Subway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Construction_of_the_Second_Avenue_Subway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260606154024/https://en.wikipedia.org/wiki/Second_Avenue_Subway", "kind": "wikipedia", "quote": "On December 19, the start of revenue service was announced as noon on January 1, 2017.", "tier": "tertiary", "title": "Second Avenue Subway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Second_Avenue_Subway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260315113713/https://www.mcny.org/story/ringing-new-year-second-avenue-subway", "kind": "other", "quote": "Phase 1 of the Second Avenue Subway opened for service on January 1, 2017", "tier": "secondary", "title": "Ringing in the New Year with the Second Avenue Subway — Museum of the City of New York", "url": "https://www.mcny.org/story/ringing-new-year-second-avenue-subway" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20260305132253/https://www.masstransitmag.com/rail/article/12227191/project-update-second-avenue-subway", "kind": "news", "publisher": "Mass Transit Magazine", "quote": "New York Metropolitan Transportation Authority's (MTA) Second Avenue Subway is a 4.45 billion dollar project that has been in the making for the past 87 years.", "tier": "secondary", "title": "Project Update: Second Avenue Subway", "url": "https://www.masstransitmag.com/rail/article/12227191/project-update-second-avenue-subway", "via": "https://en.wikipedia.org/wiki/Construction_of_the_Second_Avenue_Subway" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20260211143314/https://www.cbsnews.com/news/drones-exclusive-look-at-new-york-city-second-avenue-subway-line/", "kind": "news", "publisher": "CBS News", "quote": "It's four and a half billion dollars for three stations.", "tier": "secondary", "title": "Drone takes tour of NYC's 2nd Avenue subway line", "url": "https://www.cbsnews.com/news/drones-exclusive-look-at-new-york-city-second-avenue-subway-line/", "via": "https://en.wikipedia.org/wiki/Construction_of_the_Second_Avenue_Subway" } ] }, "geometryRef": "nyc-IND Second Avenue Line", "id": "nyc-ind-second-avenue-line-20170101-0", "kind": "initial", "label": { "en": "Phase 1 opens: 63rd Street → 96th Street (Q train extension up Second Avenue)" }, "notes": "[Date chase 2026-06-12] The two underlying MTA primary sources cited by Wikipedia — the MTA Capital Construction History page (web.info/capconstr/sas/background.html) and the April 12, 2007 MTA 'Breaks Ground' press release — are both dead links; the press-release archive snapshot (web.archive.org 20151221130833) was offline and could not be fetched, so both remain unverifiable. Secondary/tertiary corroboration is sufficient to confirm the 2007 year. [Opening-date chase 2026-06-13] A ceremonial/VIP-only first train ran the evening of December 31, 2016 (New Year's Eve, ~10:30 PM from 72nd St) with Gov. Cuomo and Mayor de Blasio; that was not revenue service. Regular public service began at noon on January 1, 2017.", "opened": "2017-01-01", "segment": { "fromStopIndex": 0, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260525233856/https://en.wikipedia.org/wiki/Construction_of_the_Second_Avenue_Subway", "kind": "wikipedia", "quote": "The first phase of the line, consisting of three newly built stations and two miles (3.2 km) of tunnel, cost $4.45 billion.", "tier": "tertiary", "title": "Construction of the Second Avenue Subway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Construction_of_the_Second_Avenue_Subway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260525233856/https://en.wikipedia.org/wiki/Construction_of_the_Second_Avenue_Subway", "kind": "wikipedia", "quote": "Actual construction work began on April 23, 2007, with the relocation of utility pipes, wires, and other infrastructure.", "tier": "tertiary", "title": "Construction of the Second Avenue Subway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Construction_of_the_Second_Avenue_Subway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260606154024/https://en.wikipedia.org/wiki/Second_Avenue_Subway", "kind": "wikipedia", "quote": "On December 19, the start of revenue service was announced as noon on January 1, 2017.", "tier": "tertiary", "title": "Second Avenue Subway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Second_Avenue_Subway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260315113713/https://www.mcny.org/story/ringing-new-year-second-avenue-subway", "kind": "other", "quote": "Phase 1 of the Second Avenue Subway opened for service on January 1, 2017", "tier": "secondary", "title": "Ringing in the New Year with the Second Avenue Subway — Museum of the City of New York", "url": "https://www.mcny.org/story/ringing-new-year-second-avenue-subway" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260407050842/https://www.wnyc.org/story/see-new-years-eve-party-and-2nd-ave-subway/", "kind": "news", "publisher": "WNYC", "quote": "The new stations at 96th, 86th and 72nd opened to the public at noon Sunday.", "tier": "secondary", "title": "See Inside: The 2nd Avenue Subway Opens to All — WNYC", "url": "http://www.wnyc.org/story/see-new-years-eve-party-and-2nd-ave-subway", "via": "https://en.wikipedia.org/wiki/Second_Avenue_Subway" } ], "stationCount": 3 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260525233856/https://en.wikipedia.org/wiki/Construction_of_the_Second_Avenue_Subway", "kind": "wikipedia", "quote": "The first phase of the line, consisting of three newly built stations and two miles (3.2 km) of tunnel, cost $4.45 billion.", "tier": "tertiary", "title": "Construction of the Second Avenue Subway — Wikipedia", "url": "https://en.wikipedia.org/wiki/Construction_of_the_Second_Avenue_Subway" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260411061213/https://www.governor.ny.gov/news/governor-hochul-announces-second-avenue-subway-phase-2-moving-forward-award-tunneling-contract", "kind": "primary", "quote": "The project budget is $6.99 billion and is funded in part by revenues from the Congestion Relief Zone tolling program.", "tier": "primary", "title": "Governor Hochul Announces Second Avenue Subway Phase 2 Moving Forward — NY State (Governor's Office)", "url": "https://www.governor.ny.gov/news/governor-hochul-announces-second-avenue-subway-phase-2-moving-forward-award-tunneling-contract" } ] }, { "cityId": "nyc", "color": "#00ADD0", "displayNumber": "IND 63rd Street Line", "id": "nyc-line-ind-63rd-street-line", "name": { "en": "IND 63rd Street Line" }, "phases": [ { "confidence": "high", "constructionStart": "1969", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": false, "value": 898000000, "year": 1989 }, "notes": "Total expenditure on the IND 63rd Street Line as stated in the Independent Subway System article. Sources conflict on the final figure: Congressional/other sources cite ~$868 million at 1989 opening; the original tunnel construction was estimated at $341 million (with $227 million in federal funds sought); by 1985 the line had reportedly cost ~$800 million plus ~$200 million more needed in fixes. Figure covers the full line/tunnel (including the lower level later used by the BMT 63rd Street Line / Second Avenue Subway), not the IND upper level alone. Using the widely-cited $898 million expenditure-at-opening figure. [Citation chase 2026-06-11] Independently corroborated by nycsubway.org (Peggy Darlington), which states the 63rd Street Extension \"had cost $898 million\" for the 1969–1989 construction (separate from the $645M 2001 QBL connector that brought the completed line to $1.54 billion as of 2001) — confirming the $898M is actual expenditure at opening, not an estimate.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260509142448/https://en.wikipedia.org/wiki/IND_63rd_Street_Line", "kind": "wikipedia", "quote": "The 63rd Street lines went into service on October 29, 1989, twenty years after construction began, with new stations at Lexington Avenue, Roosevelt Island, and 21st Street/41st Avenue in Queens.", "tier": "tertiary", "title": "IND 63rd Street Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_63rd_Street_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260509142448/https://en.wikipedia.org/wiki/IND_63rd_Street_Line", "kind": "wikipedia", "quote": "Groundbreaking ceremonies for the line took place on November 24, 1969, at Vernon Boulevard and 21st Street in Queensbridge Park, Long Island City.", "tier": "tertiary", "title": "IND 63rd Street Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_63rd_Street_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260527121409/https://en.wikipedia.org/wiki/Independent_Subway_System", "kind": "wikipedia", "quote": "A month shy of twenty years after construction began, the IND 63rd Street Line went into service on October 29, 1989, after an expenditure of $898 million,", "tier": "tertiary", "title": "Independent Subway System — Wikipedia", "url": "https://en.wikipedia.org/wiki/Independent_Subway_System" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124206/https://en.wikipedia.org/wiki/63rd_Street_Tunnel", "kind": "wikipedia", "quote": "The estimated cost of the project was $341 million, and the MTA applied for $227 million in federal funds.", "tier": "tertiary", "title": "63rd Street Tunnel — Wikipedia", "url": "https://en.wikipedia.org/wiki/63rd_Street_Tunnel" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20120511082630/http://nycsubway.org/lines/6thave.html", "kind": "other", "publisher": "nycsubway.org (Peggy Darlington)", "quote": "The 63rd Street Extension had cost $898 million; the total cost of the completed line as of 2001 came to $1.54 billion.", "tier": "secondary", "title": "IND 6th Ave./63rd St. Line — nycsubway.org", "url": "http://nycsubway.org/lines/6thave.html", "via": "https://en.wikipedia.org/wiki/Independent_Subway_System" } ] }, "geometryRef": "nyc-IND 63rd Street Line", "id": "nyc-ind-63rd-street-line-19891029-0", "kind": "initial", "label": { "en": "Initial opening: 57th Street → 21st Street–Queensbridge (via 63rd Street Tunnel)" }, "notes": "[Date chase 2026-06-12] Groundbreaking ceremony precisely dated November 24, 1969 (Vernon Boulevard and 21st Street, Queensbridge Park), per both the 63rd Street lines and 63rd Street Tunnel Wikipedia articles.", "opened": "1989-10-29", "segment": { "fromStopIndex": 0, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260509142448/https://en.wikipedia.org/wiki/IND_63rd_Street_Line", "kind": "wikipedia", "quote": "The 63rd Street lines went into service on October 29, 1989, twenty years after construction began, with new stations at Lexington Avenue, Roosevelt Island, and 21st Street/41st Avenue in Queens.", "tier": "tertiary", "title": "IND 63rd Street Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_63rd_Street_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260509142448/https://en.wikipedia.org/wiki/IND_63rd_Street_Line", "kind": "wikipedia", "quote": "Groundbreaking ceremonies for the line took place on November 24, 1969, at Vernon Boulevard and 21st Street in Queensbridge Park, Long Island City.", "tier": "tertiary", "title": "IND 63rd Street Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_63rd_Street_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260527121409/https://en.wikipedia.org/wiki/Independent_Subway_System", "kind": "wikipedia", "quote": "A month shy of twenty years after construction began, the IND 63rd Street Line went into service on October 29, 1989, after an expenditure of $898 million,", "tier": "tertiary", "title": "Independent Subway System — Wikipedia", "url": "https://en.wikipedia.org/wiki/Independent_Subway_System" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124206/https://en.wikipedia.org/wiki/63rd_Street_Tunnel", "kind": "wikipedia", "quote": "The estimated cost of the project was $341 million, and the MTA applied for $227 million in federal funds.", "tier": "tertiary", "title": "63rd Street Tunnel — Wikipedia", "url": "https://en.wikipedia.org/wiki/63rd_Street_Tunnel" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260509142449/https://en.wikipedia.org/wiki/63rd_Street_lines", "kind": "other", "publisher": "Wikipedia", "quote": "Groundbreaking ceremonies for the line took place on November 24, 1969, at Vernon Boulevard and 21st Street in Queensbridge Park, Long Island City.", "tier": "secondary", "title": "63rd Street lines — Wikipedia", "url": "https://en.wikipedia.org/wiki/63rd_Street_lines", "via": "https://en.wikipedia.org/wiki/IND_63rd_Street_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250812052122/https://www.nytimes.com/1989/10/29/nyregion/the-subway-to-nowhere-now-goes-somewhere.html", "kind": "news", "publisher": "The New York Times", "quote": "[Article published October 29, 1989 — same-day news coverage of the revenue opening; cited in Wikipedia's Opening section as the source for the October 29, 1989 date]", "tier": "secondary", "title": "The 'Subway to Nowhere' Now Goes Somewhere — The New York Times", "url": "https://www.nytimes.com/1989/10/29/nyregion/the-subway-to-nowhere-now-goes-somewhere.html", "via": "https://en.wikipedia.org/wiki/63rd_Street_lines" } ], "stationCount": 3 }, { "confidence": "high", "constructionStart": "1994", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "USD", "isEstimate": false, "value": 645000000, "year": 2001 }, "notes": "Cost of the ~1,500-foot connector tunnel from 21st Street–Queensbridge to the IND Queens Boulevard Line (no new stations). Construction began September 22, 1994; the connector was first made available for off-peak construction reroutes in December 2000 and entered regular revenue service December 16, 2001. [Citation chase 2026-06-11] The $645 million figure is corroborated as the total project (outturn) cost in then-year USD by a primary FHWA CMAQ source (\"Total Project Cost: $645 million\") and independently by the ERA Bulletin (Jan 2001) and NYT (Nov 2000).", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260509142448/https://en.wikipedia.org/wiki/IND_63rd_Street_Line", "kind": "wikipedia", "quote": "The remaining section from 21st Street to the Queens Boulevard Line, which cost $645 million, began construction on September 22, 1994.", "tier": "tertiary", "title": "IND 63rd Street Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_63rd_Street_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260509142448/https://en.wikipedia.org/wiki/IND_63rd_Street_Line", "kind": "wikipedia", "quote": "The connector came into regular use on December 16, 2001, with the rerouting of F service at all times to 63rd Street.", "tier": "tertiary", "title": "IND 63rd Street Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_63rd_Street_Line" }, { "accessedAt": "2026-06-11", "kind": "primary", "publisher": "Federal Highway Administration (FHWA)", "quote": "Total Project Cost: $645 million", "tier": "primary", "title": "New York City Transit 63rd Street-Queens Boulevard Connection-New York City – Advancing Mobility – Research – CMAQ – Air Quality – Environment – FHWA", "url": "https://www.fhwa.dot.gov/Environment/air_quality/cmaq/research/advancing_mobility/03cmaq08.cfm", "via": "https://en.wikipedia.org/wiki/IND_63rd_Street_Line" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20250110131347/https://www.erausa.org/pdf/bulletin/2000s/2001/2001-02-bulletin.pdf", "kind": "other", "publisher": "Electric Railroaders' Association, Incorporated (The Bulletin, Vol. 44, No. 2, January 2001)", "quote": "After 6½ years of construction at a cost of $645 million, the approximately 1,800-foot-long connection achieved beneficial use on December 11, 2000.", "tier": "secondary", "title": "New York City Transit's 63rd Street Connector Opens for Service", "url": "https://www.erausa.org/pdf/bulletin/2000s/2001/2001-02-bulletin.pdf", "via": "https://en.wikipedia.org/wiki/IND_63rd_Street_Line" }, { "accessedAt": "2026-06-11", "kind": "news", "publisher": "The New York Times (Susan Saulny, November 28, 2000)", "quote": "The tunnel addition cost $645 million and runs for 1,500 feet between the 21st Street-Queensbridge station and the Queens Boulevard Line.", "tier": "secondary", "title": "Another Tunnel Offers Breathing Room for E and F Trains", "url": "https://web.archive.org/web/20130623074746/http://www.nytimes.com/2000/11/28/nyregion/another-tunnel-offers-breathing-room-for-e-and-f-trains.html", "via": "https://en.wikipedia.org/wiki/IND_63rd_Street_Line" } ] }, "geometryRef": null, "id": "nyc-ind-63rd-street-line-20011216-1", "kind": "extension", "label": { "en": "63rd Street Connector opens: 21st Street–Queensbridge → IND Queens Boulevard Line (F service rerouted)" }, "notes": "[Date chase 2026-06-12] Construction start September 22, 1994 (21st Street to Queens Boulevard Line connector); independently corroborated by the FHWA primary government source stating construction started September 1994, completed 2001. [Opening-date chase 2026-06-13] 63rd Street Connector first carried revenue passengers Jan 13, 2001 as a weekend-only General Order reroute (E trains); permanent all-times revenue service (F rerouted) began Dec 16, 2001, which is the curated date. Earlier partial use, later full opening; same year.", "opened": "2001-12-16", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260509142448/https://en.wikipedia.org/wiki/IND_63rd_Street_Line", "kind": "wikipedia", "quote": "The remaining section from 21st Street to the Queens Boulevard Line, which cost $645 million, began construction on September 22, 1994.", "tier": "tertiary", "title": "IND 63rd Street Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_63rd_Street_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260509142448/https://en.wikipedia.org/wiki/IND_63rd_Street_Line", "kind": "wikipedia", "quote": "The connector came into regular use on December 16, 2001, with the rerouting of F service at all times to 63rd Street.", "tier": "tertiary", "title": "IND 63rd Street Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_63rd_Street_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260509142449/https://en.wikipedia.org/wiki/63rd_Street_lines", "kind": "other", "publisher": "Wikipedia", "quote": "The remaining section from 21st Street to the Queens Boulevard Line, which cost $645 million, began construction on September 22, 1994.", "tier": "secondary", "title": "63rd Street lines — Wikipedia", "url": "https://en.wikipedia.org/wiki/63rd_Street_lines", "via": "https://en.wikipedia.org/wiki/IND_63rd_Street_Line" }, { "accessedAt": "2026-06-12", "kind": "primary", "publisher": "Federal Highway Administration (US government)", "quote": "Construction was started in September 1994, and completed in 2001.", "tier": "primary", "title": "New York City Transit 63rd Street-Queens Boulevard Connection — FHWA", "url": "https://www.fhwa.dot.gov/Environment/air_quality/cmaq/research/advancing_mobility/03cmaq08.cfm", "via": "https://en.wikipedia.org/wiki/IND_63rd_Street_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250110131347/https://www.erausa.org/pdf/bulletin/2000s/2001/2001-02-bulletin.pdf", "kind": "other", "publisher": "Electric Railroaders' Association", "quote": "On Saturday, January 13, 2001 at 0014 hours, the 2343 E out of World Trade Center became the first scheduled revenue train to carry passengers through New York City Transit's 63rd Street Connector between the 63rd Street Line and the Queens Boulevard Line. [...] The connection will not see regularly scheduled everyday use until August of this year.", "tier": "secondary", "title": "New York City Transit's 63rd Street Connector Opens for Service — ERA Bulletin, February 2001", "url": "https://www.erausa.org/pdf/bulletin/2000s/2001/2001-02-bulletin.pdf", "via": "https://en.wikipedia.org/wiki/63rd_Street_lines" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251006003126/https://www.nytimes.com/2001/12/17/nyregion/v-train-begins-service-today-giving-queens-commuters-another-option.html", "kind": "news", "publisher": "The New York Times", "quote": "[Article published December 17, 2001, the day after opening — cited in Wikipedia as 'Kershaw 2001' for the December 16, 2001 date]", "tier": "secondary", "title": "V Train Begins Service Today, Giving Queens Commuters Another Option — The New York Times", "url": "https://www.nytimes.com/2001/12/17/nyregion/v-train-begins-service-today-giving-queens-commuters-another-option.html", "via": "https://en.wikipedia.org/wiki/63rd_Street_lines" } ], "stationCount": 0 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260509142448/https://en.wikipedia.org/wiki/IND_63rd_Street_Line", "kind": "wikipedia", "quote": "The 63rd Street lines went into service on October 29, 1989, twenty years after construction began, with new stations at Lexington Avenue, Roosevelt Island, and 21st Street/41st Avenue in Queens.", "tier": "tertiary", "title": "IND 63rd Street Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_63rd_Street_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260527121409/https://en.wikipedia.org/wiki/Independent_Subway_System", "kind": "wikipedia", "quote": "A month shy of twenty years after construction began, the IND 63rd Street Line went into service on October 29, 1989, after an expenditure of $898 million,", "tier": "tertiary", "title": "Independent Subway System — Wikipedia", "url": "https://en.wikipedia.org/wiki/Independent_Subway_System" } ] }, { "cityId": "nyc", "color": "#FCCC0A", "displayNumber": "BMT 63rd Street Line", "id": "nyc-line-bmt-63rd-street-line", "name": { "en": "BMT 63rd Street Line" }, "phases": [ { "confidence": "medium", "constructionStart": "1969", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "USD", "isEstimate": false, "value": 868000000, "year": 1989 }, "notes": "Figure ($868M, ~half federally funded) covers the ENTIRE 63rd Street Tunnel/line project (shared IND + BMT trunk), NOT the BMT segment alone. Original 1963/1965 estimate was ~$28–$30M; an interim MTA project estimate was $341M (MTA sought $227M federal). The BMT level at Lexington Avenue was structurally built as part of this project but kept sealed behind a temporary brick wall; no separate BMT-only cost is published. [Citation chase 2026-06-11] $868M is the actual final (outturn) cost, confirmed by the NYT (Oct 29, 1989) opening-day report and corroborated by Rep. Maloney's congressional page, which states the project cost $868M with roughly half federally funded (consistent with the $530M federal share cited by NYT in 1985).", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260509142449/https://en.wikipedia.org/wiki/63rd_Street_lines", "kind": "wikipedia", "quote": "The 63rd Street lines went into service on October 29, 1989, twenty years after construction began, with new stations at Lexington Avenue, Roosevelt Island, and 21st Street/41st Avenue in Queens... The BMT line was not in use at that time.", "tier": "tertiary", "title": "63rd Street lines — Wikipedia", "url": "https://en.wikipedia.org/wiki/63rd_Street_lines" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124206/https://en.wikipedia.org/wiki/63rd_Street_Tunnel", "kind": "wikipedia", "quote": "Construction on the project began on November 24, 1969; the Kiewit Corporation was the main contractor. ... The estimated cost of the project was $341 million, and the MTA applied for $227 million in federal funds.", "tier": "tertiary", "title": "63rd Street Tunnel — Wikipedia", "url": "https://en.wikipedia.org/wiki/63rd_Street_Tunnel" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260522002812/https://en.wikipedia.org/wiki/Lexington_Avenue%E2%80%9363rd_Street_station", "kind": "wikipedia", "quote": "Construction on the 63rd Street Line, including the Lexington Avenue–63rd Street station, began on November 25, 1969.", "tier": "tertiary", "title": "Lexington Avenue–63rd Street station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Lexington_Avenue%E2%80%9363rd_Street_station" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20250812052122/https://www.nytimes.com/1989/10/29/nyregion/the-subway-to-nowhere-now-goes-somewhere.html", "kind": "news", "publisher": "The New York Times", "quote": "Regular service was to start today on the $868 million line, the first subway to the island.", "tier": "secondary", "title": "The 'Subway to Nowhere' Now Goes Somewhere", "url": "https://www.nytimes.com/1989/10/29/nyregion/the-subway-to-nowhere-now-goes-somewhere.html", "via": "https://en.wikipedia.org/wiki/63rd_Street_lines" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20250402123046/https://web.archive.org/web/20150908012022/http://maloney.house.gov/issues/local-issues/63rd-st-tunnel-connector", "kind": "primary", "publisher": "Office of Congresswoman Carolyn Maloney", "quote": "viability and other matters slowly continued until 1989 when the tunnel finally opened, having cost $868 million (roughly half of which was paid by the federal government).", "tier": "secondary", "title": "63rd St Tunnel Connector", "url": "https://web.archive.org/web/20150908012022/http://maloney.house.gov/issues/local-issues/63rd-st-tunnel-connector", "via": "https://en.wikipedia.org/wiki/Lexington_Avenue%E2%80%9363rd_Street_station" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20250905181944/https://www.nytimes.com/1985/08/18/nyregion/us-holds-up-aid-for-subway-work.html", "kind": "news", "publisher": "The New York Times", "quote": "A total of more than $1 billion has been spent on both of them. Of that amount, the M.T.A. said the Federal Government had provided $530 million for the 63d Street tunnel and $295 million for the Archer Avenue line.", "tier": "secondary", "title": "U.S. Holds Up Aid For Subway Work", "url": "https://www.nytimes.com/1985/08/18/nyregion/us-holds-up-aid-for-subway-work.html", "via": "https://en.wikipedia.org/wiki/63rd_Street_lines" } ] }, "geometryRef": "nyc-BMT 63rd Street Line", "id": "nyc-bmt-63rd-street-line-19891029-0", "kind": "initial", "label": { "en": "BMT 63rd Street Line built (Lexington Avenue–63rd Street upper-level / BMT track level) but sealed, no revenue service" }, "notes": "[Date chase 2026-06-12] Groundbreaking ceremony for the 63rd Street line was held November 24, 1969 at Vernon Boulevard and 21st Street in Queensbridge Park, Long Island City; Kiewit Corporation was the main contractor. Construction-start date is sourced to NYT (Burks, 'Mayor and Governor Unite to Start Transit Tube', Nov 25, 1969), cited via the 63rd Street Tunnel Wikipedia article (direct access paywalled). [Opening-date chase 2026-06-13] On 1989-10-29 the BMT level (north side of Lexington Avenue-63rd Street) was physically built but sealed behind a temporary orange brick wall and used only for train storage; only the IND south side opened to revenue passengers. The curated 'built but sealed, no revenue service' label is accurate.", "opened": "1989-10-29", "segment": { "fromStopIndex": 0, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260509142449/https://en.wikipedia.org/wiki/63rd_Street_lines", "kind": "wikipedia", "quote": "The 63rd Street lines went into service on October 29, 1989, twenty years after construction began, with new stations at Lexington Avenue, Roosevelt Island, and 21st Street/41st Avenue in Queens... The BMT line was not in use at that time.", "tier": "tertiary", "title": "63rd Street lines — Wikipedia", "url": "https://en.wikipedia.org/wiki/63rd_Street_lines" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124206/https://en.wikipedia.org/wiki/63rd_Street_Tunnel", "kind": "wikipedia", "quote": "Construction on the project began on November 24, 1969; the Kiewit Corporation was the main contractor. ... The estimated cost of the project was $341 million, and the MTA applied for $227 million in federal funds.", "tier": "tertiary", "title": "63rd Street Tunnel — Wikipedia", "url": "https://en.wikipedia.org/wiki/63rd_Street_Tunnel" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260522002812/https://en.wikipedia.org/wiki/Lexington_Avenue%E2%80%9363rd_Street_station", "kind": "wikipedia", "quote": "Construction on the 63rd Street Line, including the Lexington Avenue–63rd Street station, began on November 25, 1969.", "tier": "tertiary", "title": "Lexington Avenue–63rd Street station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Lexington_Avenue%E2%80%9363rd_Street_station" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20241203043527/https://www.nytimes.com/1969/11/25/archives/mayor-and-governor-unite-to-start-transit-tube.html", "kind": "news", "publisher": "The New York Times", "quote": "Cited by the 63rd Street Tunnel Wikipedia article as the source for the November 24, 1969 construction start date; article dated November 25, 1969 (day after groundbreaking ceremony). Direct access blocked (paywall).", "tier": "primary", "title": "Mayor and Governor Unite to Start Transit Tube", "url": "https://www.nytimes.com/1969/11/25/archives/mayor-and-governor-unite-to-start-transit-tube.html", "via": "https://en.wikipedia.org/wiki/63rd_Street_Tunnel" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250812052122/https://www.nytimes.com/1989/10/29/nyregion/the-subway-to-nowhere-now-goes-somewhere.html", "kind": "news", "publisher": "The New York Times", "quote": "Cited by the 63rd Street lines Wikipedia article as the source for the October 29, 1989 opening date; article dated October 29, 1989 (day of opening). Direct access blocked (paywall).", "tier": "secondary", "title": "The 'Subway to Nowhere' Now Goes Somewhere", "url": "https://www.nytimes.com/1989/10/29/nyregion/the-subway-to-nowhere-now-goes-somewhere.html", "via": "https://en.wikipedia.org/wiki/63rd_Street_lines" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "nyc-BMT 63rd Street Line", "id": "nyc-bmt-63rd-street-line-20170101-1", "kind": "reopening", "label": { "en": "BMT 63rd Street Line first carries revenue service — Q (all times) and N (rush-hour) via Second Avenue Subway Phase 1, BMT level at Lexington Avenue–63rd Street opened to passengers" }, "notes": "[Opening-date chase 2026-06-13] Ceremonial vs revenue trap cleared: a private VIP ceremonial first train (Gov. Cuomo, Mayor de Blasio) ran New Year's Eve, December 31, 2016; regular public/revenue service began at noon on January 1, 2017. Curated date correctly reflects the revenue opening, and the ceremonial date falls in the same year regardless.", "opened": "2017-01-01", "segment": { "fromStopIndex": 1, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260509142449/https://en.wikipedia.org/wiki/63rd_Street_lines", "kind": "wikipedia", "quote": "On January 1, 2017, the first phase of the Second Avenue Line opened, extending the Q and N services under Central Park and eastward to the stop at Lexington Avenue–63rd Street before turning north at Second Avenue.", "tier": "tertiary", "title": "63rd Street lines — Wikipedia", "url": "https://en.wikipedia.org/wiki/63rd_Street_lines" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260522002812/https://en.wikipedia.org/wiki/Lexington_Avenue%E2%80%9363rd_Street_station", "kind": "wikipedia", "quote": "The MTA inaugurated Phase 1 of Second Avenue Subway service on January 1, 2017.", "tier": "tertiary", "title": "Lexington Avenue–63rd Street station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Lexington_Avenue%E2%80%9363rd_Street_station" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251231005459/https://www.nytimes.com/2017/01/01/nyregion/second-avenue-subway-opening-upper-east-side-manhattan.html", "kind": "news", "publisher": "The New York Times", "quote": "Cited by the Second Avenue Subway and 63rd Street lines Wikipedia articles as the primary news source for the January 1, 2017 opening. Dated January 1, 2017. Direct access blocked (paywall).", "tier": "secondary", "title": "Opening of Second Avenue Subway: Updates", "url": "https://www.nytimes.com/2017/01/01/nyregion/second-avenue-subway-opening-upper-east-side-manhattan.html", "via": "https://en.wikipedia.org/wiki/63rd_Street_lines" } ], "stationCount": 0 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260509142449/https://en.wikipedia.org/wiki/63rd_Street_lines", "kind": "wikipedia", "quote": "The 63rd Street lines went into service on October 29, 1989, twenty years after construction began, with new stations at Lexington Avenue, Roosevelt Island, and 21st Street/41st Avenue in Queens... The BMT line was not in use at that time.", "tier": "tertiary", "title": "63rd Street lines — Wikipedia", "url": "https://en.wikipedia.org/wiki/63rd_Street_lines" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260522002812/https://en.wikipedia.org/wiki/Lexington_Avenue%E2%80%9363rd_Street_station", "kind": "wikipedia", "quote": "Construction on the 63rd Street Line, including the Lexington Avenue–63rd Street station, began on November 25, 1969.", "tier": "tertiary", "title": "Lexington Avenue–63rd Street station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Lexington_Avenue%E2%80%9363rd_Street_station" } ] }, { "cityId": "nyc", "color": "#FF6319", "displayNumber": "IND Queens Boulevard Line", "id": "nyc-line-ind-queens-boulevard-line", "name": { "en": "IND Queens Boulevard Line" }, "phases": [ { "confidence": "medium", "constructionStart": "1928", "cost": { "basis": "budget", "confidence": "low", "nominal": { "currency": "USD", "isEstimate": false, "value": 58000000, "year": 1933 }, "notes": "$58 million is cited as the cost of the WHOLE Queens Boulevard Line, not this initial segment alone. Construction began December 1928; groundbreaking was 2 April 1927 at Vernon Boulevard and 44th Drive, Long Island City. The initial Queens stations were Queens Plaza, 36th Street, Steinway Street, 46th Street, Northern Boulevard, 65th Street and Roosevelt Avenue (running west into the Eighth Avenue Line). [Citation chase 2026-06-11] The $58M figure traces to a single secondary source (Wikipedia), whose only underlying citation — \"More Subway Links To Open,\" The New York Sun, Aug 17, 1933 (via fultonhistory.com) — is offline with no Wayback snapshot and could not be verified; no independent corroboration was found. As a \"whole line\" total reported in 1933 while the line was only beginning to open in stages, the figure most likely reflects an authorized/projected total for the full project rather than a verified final cost.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260205025420/https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line", "kind": "wikipedia", "quote": "The first section of the line, west from Roosevelt Avenue to 50th Street, opened on August 19, 1933 at 12:01 a.m.", "tier": "tertiary", "title": "IND Queens Boulevard Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260205025420/https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line", "kind": "wikipedia", "quote": "Construction on the line began in December 1928, and the whole line cost $58 million.", "tier": "tertiary", "title": "IND Queens Boulevard Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" } ] }, "geometryRef": "nyc-IND Queens Boulevard Line", "id": "nyc-ind-queens-boulevard-line-19330819-0", "kind": "initial", "label": { "en": "Stage 1 opens: Roosevelt Avenue → 50th Street (initial Queens Boulevard Line, connecting to IND Eighth Avenue Line in Manhattan)" }, "notes": "[Date chase 2026-06-12] Wikipedia also notes the Board of Estimate approved the Queens Boulevard Line route on October 4, 1928, consistent with a December 1928 construction start. [Opening-date chase 2026-06-13] Public revenue service began at 12:01 a.m. on August 19, 1933; the August 18, 1933 NYT article is a day-before preview, not a separate event. No ceremonial/revenue ambiguity.", "opened": "1933-08-19", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260205025420/https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line", "kind": "wikipedia", "quote": "The first section of the line, west from Roosevelt Avenue to 50th Street, opened on August 19, 1933 at 12:01 a.m.", "tier": "tertiary", "title": "IND Queens Boulevard Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260205025420/https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line", "kind": "wikipedia", "quote": "Construction on the line began in December 1928, and the whole line cost $58 million.", "tier": "tertiary", "title": "IND Queens Boulevard Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613162917/https://timesmachine.nytimes.com/timesmachine/1933/08/18/99841892.html?pdf_redirect=true&site=false", "kind": "news", "publisher": "The New York Times", "quote": "Two Subway Units Open At Midnight [August 19, 1933] — article dated August 18, 1933, previewing the midnight opening", "tier": "secondary", "title": "Two Subway Units Open At Midnight; Links in City-Owned System in Queens and Brooklyn to Have 15 Stations", "url": "https://timesmachine.nytimes.com/timesmachine/1933/08/18/99841892.pdf", "via": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" } ], "stationCount": 7 }, { "confidence": "medium", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": false, "value": 27000000, "year": 1936 }, "notes": "Extension cost $27 million, of which $5.8M for Jamaica Yard, $1.4M for real estate, and $16.2M for tunnels and tracks. Extension was about 3.5 miles (5.6 km) and added eight stops east of Roosevelt Avenue to Union Turnpike. [Citation chase 2026-06-11] Figure is a contemporaneous reported (outturn) cost: the Brooklyn Daily Eagle (Dec 30, 1936) headline independently confirms the \"$27,000,000\" extension to Kew Gardens. The cost breakdown in the source includes an unlabeled $2.2M sub-item (a transcription gap in the Wikipedia text), so the named sub-items do not fully sum to the $27M total.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260205025420/https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line", "kind": "wikipedia", "quote": "the line was extended east from Roosevelt Avenue to Union Turnpike on that date. This extension cost $27 million, of which $5.8 million was for Jamaica Yard, $1.4 million was for real estate, $2.2 million, and $16.2 million for tunnels and tracks.", "tier": "tertiary", "title": "IND Queens Boulevard Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260205025420/https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line", "kind": "wikipedia", "quote": "On December 31, 1936, the IND Queens Boulevard Line was extended by eight stops and 3.5 miles (5.6 km), from its previous terminus at Roosevelt Avenue to Union Turnpike.", "tier": "tertiary", "title": "IND Queens Boulevard Line — Wikipedia (search summary)", "url": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20260206100456/https://bklyn.newspapers.com/image/52710422/", "kind": "news", "publisher": "Brooklyn Daily Eagle", "quote": "$27,000,000 Independent Extension to Kew Gardens", "tier": "primary", "title": "LaGuardia at Throttle On Subway Joyride. 750 Passengers, Including Celebrities, Guests on Trial Trip Over New $27,000,000 Independent Extension to Kew Gardens", "url": "https://bklyn.newspapers.com/image/52710422", "via": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" } ] }, "geometryRef": "nyc-IND Queens Boulevard Line", "id": "nyc-ind-queens-boulevard-line-19361231-1", "kind": "extension", "label": { "en": "Extension: Roosevelt Avenue → Kew Gardens–Union Turnpike" }, "notes": "[Opening-date chase 2026-06-13] Mayor LaGuardia made a trial run on December 30, 1936 (distinct from the public opening); revenue service opened December 31, 1936 as curated.", "opened": "1936-12-31", "segment": { "fromStopIndex": 1, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260205025420/https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line", "kind": "wikipedia", "quote": "the line was extended east from Roosevelt Avenue to Union Turnpike on that date. This extension cost $27 million, of which $5.8 million was for Jamaica Yard, $1.4 million was for real estate, $2.2 million, and $16.2 million for tunnels and tracks.", "tier": "tertiary", "title": "IND Queens Boulevard Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260205025420/https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line", "kind": "wikipedia", "quote": "On December 31, 1936, the IND Queens Boulevard Line was extended by eight stops and 3.5 miles (5.6 km), from its previous terminus at Roosevelt Avenue to Union Turnpike.", "tier": "tertiary", "title": "IND Queens Boulevard Line — Wikipedia (search summary)", "url": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" }, { "accessedAt": "2026-06-13", "kind": "news", "publisher": "The New York Times", "quote": "Queens Section to Be Opened Tomorrow [December 31, 1936] — article dated December 30, 1936", "tier": "secondary", "title": "PWA Party Views New Subway Link: Queens Section to Be Opened Tomorrow Is Inspected by Tuttle and Others", "url": "https://timesmachine.nytimes.com/timesmachine/1936/12/30/88096632.pdf", "via": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" } ], "stationCount": 8 }, { "confidence": "medium", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": false, "value": 14400000, "year": 1937 }, "notes": "Mayor La Guardia announced on 9 April 1937 that operation of the $14.4 million extension to Jamaica and express service would begin 24 April. New stations: Briarwood (Van Wyck Boulevard), Sutphin Boulevard, Parsons Boulevard, 169th Street, plus 75th Avenue. Construction was delayed by a ~15-month suspension in 1934–35 and a 1935 electricians' strike. [Citation chase 2026-06-11] Figure is a nominal 1937-dollar cost for the Kew Gardens–169th Street (Jamaica) segment only; the prior Roosevelt Ave–Kew Gardens phase was reported separately as a ~$27M extension. The $14.4M is confirmed verbatim in the Wikipedia text, but its underlying citations (Kramer 1990; Roess & Sansone 2012; two 1937 NYT articles) could not be accessed to independently verify the figure.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260205025420/https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line", "kind": "wikipedia", "quote": "The extension to Hillside Avenue and 178th Street, with a terminal station at 169th Street opened as planned on April 24, 1937.", "tier": "tertiary", "title": "IND Queens Boulevard Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260205025420/https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line", "kind": "wikipedia", "quote": "the operation of the $14.4 million extension to Jamaica and express service would begin on April 24.", "tier": "tertiary", "title": "IND Queens Boulevard Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" } ] }, "geometryRef": "nyc-IND Queens Boulevard Line", "id": "nyc-ind-queens-boulevard-line-19370424-2", "kind": "extension", "label": { "en": "Extension: Kew Gardens–Union Turnpike → 169th Street (Jamaica), with express service inaugurated" }, "notes": "[Opening-date chase 2026-06-13] Revenue service opened April 24, 1937 (NYT 'open today'); the April 25 NYT report covers the officials' ceremonial trial run held the same day, not a separate opening date.", "opened": "1937-04-24", "segment": { "fromStopIndex": 4, "toStopIndex": 8 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260205025420/https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line", "kind": "wikipedia", "quote": "The extension to Hillside Avenue and 178th Street, with a terminal station at 169th Street opened as planned on April 24, 1937.", "tier": "tertiary", "title": "IND Queens Boulevard Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260205025420/https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line", "kind": "wikipedia", "quote": "the operation of the $14.4 million extension to Jamaica and express service would begin on April 24.", "tier": "tertiary", "title": "IND Queens Boulevard Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20241127072425/https://www.nytimes.com/1937/04/24/archives/transit-link-open-today-8th-ave-line-extended-to-jamaicacelebration.html", "kind": "news", "publisher": "The New York Times", "quote": "Transit Link Open Today; 8th Ave. Line Extended to Jamaica — dated April 24, 1937, confirming revenue service opened that day", "tier": "secondary", "title": "Transit Link Open Today; 8th Ave. Line Extended to Jamaica—Celebration Arranged", "url": "https://www.nytimes.com/1937/04/24/archives/transit-link-open-today-8th-ave-line-extended-to-jamaicacelebration.html", "via": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251107063547/https://www.nytimes.com/1937/04/25/archives/new-subway-link-to-jamaica-opened-la-guardia-city-officials-and.html", "kind": "news", "publisher": "The New York Times", "quote": "New Subway Link to Jamaica Opened [past tense]; La Guardia, City Officials and Civic Groups Make Trial Run on 10-Car Train — April 25, 1937 next-day report; officials' ceremonial run was April 24, the same day as public opening", "tier": "secondary", "title": "New Subway Link to Jamaica Opened; La Guardia, City Officials and Civic Groups Make Trial Run on 10-Car Train", "url": "https://www.nytimes.com/1937/04/25/archives/new-subway-link-to-jamaica-opened-la-guardia-city-officials-and.html", "via": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" } ], "stationCount": 5 }, { "confidence": "medium", "geometryRef": null, "id": "nyc-ind-queens-boulevard-line-19390828-3", "kind": "extension", "label": { "en": "Infill station opens: 23rd Street–Ely Avenue (between Queens Plaza and the Manhattan crossing)" }, "notes": "[Opening-date chase 2026-06-13] 23rd St-Ely Avenue infill station opened August 28, 1939, confirmed by both an August 5 advance notice and an August 26 day-before NYT notice.", "opened": "1939-08-28", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260205025420/https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line", "kind": "wikipedia", "quote": "23rd Street–Ely Avenue station opened as an in-fill station on August 28, 1939.", "tier": "tertiary", "title": "IND Queens Boulevard Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613163007/https://timesmachine.nytimes.com/timesmachine/1939/08/05/94706861.html?pdf_redirect=true&site=false", "kind": "news", "publisher": "The New York Times", "quote": "Subway Station Opens Aug. 28 — advance announcement dated August 5, 1939, confirming August 28 as the opening date", "tier": "secondary", "title": "Subway Station Opens Aug. 28", "url": "https://timesmachine.nytimes.com/timesmachine/1939/08/05/94706861.pdf", "via": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613163011/https://timesmachine.nytimes.com/timesmachine/1939/08/26/93950787.pdf", "kind": "news", "publisher": "The New York Times", "quote": "Ely Subway Stop To Open; Queens Station on City-Owned Line Begins Service Tomorrow — dated August 26, 1939, confirming August 28 opening", "tier": "secondary", "title": "Ely Subway Stop To Open; Queens Station on City-Owned Line Begins Service Tomorrow", "url": "https://timesmachine.nytimes.com/timesmachine/1939/08/26/93950787.pdf", "via": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" } ], "stationCount": 1 }, { "confidence": "medium", "constructionStart": "1947", "cost": { "basis": "estimate", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": true, "value": 10300000, "year": 1950 }, "notes": "Project estimated at $10.3 million, of which $7,764,000 was for construction; the low construction bid was $5,284,888 (Van Wagner Construction Company). Construction started in 1947 and was projected for 1949 but opened later than expected on 11 December 1950. [Citation chase 2026-06-11] The $10.3M figure is a 1946 project estimate (Board of Estimate approval, Aug 1 1946) covering construction plus rolling stock, substations, third rail, signal and electrical equipment — not solely civil construction, and not an actual final cost; the $7,764,000 construction portion is the comparable build figure. Both NYT primary sources backing the estimate are paywalled and could not be independently verified.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260205025420/https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line", "kind": "wikipedia", "quote": "The extension was completed later than expected and opened on December 11, 1950.", "tier": "tertiary", "title": "IND Queens Boulevard Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260205025420/https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line", "kind": "wikipedia", "quote": "Construction on the extension started in 1947 and was projected to be completed in 1949.", "tier": "tertiary", "title": "IND Queens Boulevard Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260205025420/https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line", "kind": "wikipedia", "quote": "estimated to cost $10.3 million, of which, $7,764,000 would go to construction.", "tier": "tertiary", "title": "IND Queens Boulevard Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" } ] }, "geometryRef": null, "id": "nyc-ind-queens-boulevard-line-19501211-4", "kind": "extension", "label": { "en": "Extension: 169th Street → Jamaica–179th Street (terminal extension)" }, "notes": "[Date chase 2026-06-12] NYT Mar 6, 1947 ground-breaking ceremony for the Jamaica-179th Street extension confirms the 1947 start year. [Opening-date chase 2026-06-13] Opened December 11, 1950; the December 12, 1950 NYT article is next-day reporting on the revenue service start.", "opened": "1950-12-11", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260205025420/https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line", "kind": "wikipedia", "quote": "The extension was completed later than expected and opened on December 11, 1950.", "tier": "tertiary", "title": "IND Queens Boulevard Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260205025420/https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line", "kind": "wikipedia", "quote": "Construction on the extension started in 1947 and was projected to be completed in 1949.", "tier": "tertiary", "title": "IND Queens Boulevard Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260205025420/https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line", "kind": "wikipedia", "quote": "estimated to cost $10.3 million, of which, $7,764,000 would go to construction.", "tier": "tertiary", "title": "IND Queens Boulevard Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613163026/https://timesmachine.nytimes.com/timesmachine/1950/12/12/313752702.html?pdf_redirect=true&site=false", "kind": "news", "publisher": "The New York Times", "quote": "New Subway Link Opening in Queens — article dated December 12, 1950 (day after opening), next-day reporting on the December 11, 1950 revenue service start", "tier": "secondary", "title": "New Subway Link Opening in Queens", "url": "https://timesmachine.nytimes.com/timesmachine/1950/12/12/313752702.pdf", "via": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "nyc-IND Queens Boulevard Line#2", "id": "nyc-ind-queens-boulevard-line-19330819-53rd-tunnel", "kind": "extension", "label": { "en": "53rd Street tunnel connector: 42nd St–Port Authority ↔ Queens Plaza (QBL opening into Manhattan)" }, "notes": "Connector branch: the initial 1933 QBL opening ran into Manhattan via the 53rd St tunnel to 50th St (see the 1933 phase label). No separate cost (shared with the main 1933 opening). [Opening-date chase 2026-06-13] The 53rd Street Tunnel opened as part of the same inaugural August 19, 1933 section as Phase 1; the Wikipedia station table lists tunnel stations with that date. No separate opening event.", "opened": "1933-08-19", "segment": { "fromStopIndex": 0, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260205025420/https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line", "kind": "wikipedia", "quote": "The first section of the line, west from Roosevelt Avenue to 50th Street, opened on August 19, 1933 at 12:01 a.m.", "tier": "tertiary", "title": "IND Queens Boulevard Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260205025420/https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line", "kind": "wikipedia", "quote": "Construction on the line began in December 1928, and the whole line cost $58 million.", "tier": "tertiary", "title": "IND Queens Boulevard Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613162917/https://timesmachine.nytimes.com/timesmachine/1933/08/18/99841892.html?pdf_redirect=true&site=false", "kind": "news", "publisher": "The New York Times", "quote": "Two Subway Units Open At Midnight [August 19, 1933] — the inaugural section included the 53rd Street Tunnel connection between Queens Plaza and 50th Street/Manhattan", "tier": "secondary", "title": "Two Subway Units Open At Midnight; Links in City-Owned System in Queens and Brooklyn to Have 15 Stations", "url": "https://timesmachine.nytimes.com/timesmachine/1933/08/18/99841892.pdf", "via": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260205025420/https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line", "kind": "wikipedia", "quote": "The first section of the line, west from Roosevelt Avenue to 50th Street, opened on August 19, 1933 at 12:01 a.m.", "tier": "tertiary", "title": "IND Queens Boulevard Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Queens_Boulevard_Line" } ] }, { "cityId": "nyc", "color": "#FF6319", "displayNumber": "IND Concourse Line", "id": "nyc-line-ind-concourse-line", "name": { "en": "IND Concourse Line" }, "phases": [ { "confidence": "high", "constructionStart": "1928", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": false, "value": 40500000, "year": 1933 }, "notes": "Final construction cost of the Concourse Line as reported by English Wikipedia ($40.5 million). Price-year not explicitly stated; taken as of the 1933 opening. Covers the full Concourse Line built by the City of New York under the IND program. The line opened in a single stage — all 12 stations opened simultaneously — less than ten months after the first IND line (Eighth Avenue). Construction began July 1928; completion originally planned for January 1933 but delayed by post-Wall-Street-Crash financial difficulties. [Citation chase 2026-06-11] Per the New York Times (June 18, 1933), the $40.5 million is the construction cost \"exclusive of engineering, administrative and financing charges,\" so the all-in cost was somewhat higher; the figure is a contemporaneous near-completion (outturn) cost. A second contemporaneous corroborating source (NY Herald Tribune, same date) exists but is paywalled and unverified.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260607204727/https://en.wikipedia.org/wiki/IND_Concourse_Line", "kind": "wikipedia", "quote": "The entire Concourse Line opened on July 1, 1933, less than ten months after the IND's first line, the IND Eighth Avenue Line, opened for service.", "tier": "tertiary", "title": "IND Concourse Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Concourse_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260607204727/https://en.wikipedia.org/wiki/IND_Concourse_Line", "kind": "wikipedia", "quote": "Construction Start: July 1928 ... Construction Cost: $40.5 million ... The line was supposed to be completed by January 1933, but this was delayed due to financial difficulties following the Wall Street Crash of 1929.", "tier": "tertiary", "title": "IND Concourse Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Concourse_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260202021901/https://www.nycsubway.org/wiki/IND_Concourse_Line", "kind": "other", "quote": "Opening Date: 7/1/1933 ... All stations opened simultaneously on July 1, 1933, indicating a single-stage opening rather than phased development.", "tier": "secondary", "title": "IND Concourse Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/IND_Concourse_Line" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20250903101428/https://www.nytimes.com/1933/06/18/archives/new-bronx-subway-to-operate-my-1-city-extension-to-205th-street-to.html", "kind": "news", "publisher": "The New York Times", "quote": "The cost of the Bronx Concourse line, exclusive of engineering, administrative and financing charges, is about $40,500,000.", "tier": "secondary", "title": "NEW BRONX SUBWAY TO OPERATE MY 1; City Extension to 205th Street to Be Opened Two Months Ahead of Schedule. 700 EMPLOYES ARE HIRED", "url": "https://www.nytimes.com/1933/06/18/archives/new-bronx-subway-to-operate-my-1-city-extension-to-205th-street-to.html", "via": "https://en.wikipedia.org/wiki/IND_Concourse_Line" } ] }, "geometryRef": "nyc-IND Concourse Line", "id": "nyc-ind-concourse-line-19330701-0", "kind": "initial", "label": { "en": "Line opens in one stage: Norwood–205th Street → 145th Street (junction with IND Eighth Avenue Line)" }, "notes": "[Date chase 2026-06-12] Wikipedia narrative ('Construction of the line began in July 1928', citing Raskin 2013) and a Sept 2, 1928 NYT article both corroborate the 1928 start; the Raskin book page and the NYT TimesMachine PDF are paywalled and could not be directly verified. [Opening-date chase 2026-06-13] Brooklyn Daily Eagle confirms the line opened at 12:57 A.M. on July 1, 1933 (midnight revenue start, not a separate ceremonial date); a June 25, 1933 Herald Tribune preview rules out any earlier ceremonial opening.", "opened": "1933-07-01", "segment": { "fromStopIndex": 0, "toStopIndex": 11 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260607204727/https://en.wikipedia.org/wiki/IND_Concourse_Line", "kind": "wikipedia", "quote": "The entire Concourse Line opened on July 1, 1933, less than ten months after the IND's first line, the IND Eighth Avenue Line, opened for service.", "tier": "tertiary", "title": "IND Concourse Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Concourse_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260607204727/https://en.wikipedia.org/wiki/IND_Concourse_Line", "kind": "wikipedia", "quote": "Construction Start: July 1928 ... Construction Cost: $40.5 million ... The line was supposed to be completed by January 1933, but this was delayed due to financial difficulties following the Wall Street Crash of 1929.", "tier": "tertiary", "title": "IND Concourse Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Concourse_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260202021901/https://www.nycsubway.org/wiki/IND_Concourse_Line", "kind": "other", "quote": "Opening Date: 7/1/1933 ... All stations opened simultaneously on July 1, 1933, indicating a single-stage opening rather than phased development.", "tier": "secondary", "title": "IND Concourse Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/IND_Concourse_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20230416034004/https://www.newspapers.com/clip/30303616/the-brooklyn-daily-eagle/", "kind": "news", "publisher": "Brooklyn Daily Eagle", "quote": "Bronx-Concourse New Subway Link Opened at 12:57 A.M. [headline; date of paper: July 1, 1933]", "tier": "secondary", "title": "Bronx-Concourse New Subway Link Opened at 12:57 A.M.: Adds 21 1/2 Miles to City's System−Connects With Manhattan Line at 145th", "url": "https://www.newspapers.com/clip/30303616/the-brooklyn-daily-eagle/", "via": "https://en.wikipedia.org/wiki/IND_Concourse_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250616044217/https://www.nytimes.com/1933/07/01/archives/new-bronx-subway-starts-operation-40000000-branch-of-city-system.html", "kind": "news", "publisher": "The New York Times", "quote": "New Bronx Subway Starts Operation [headline; date of paper: July 1, 1933]", "tier": "secondary", "title": "New Bronx Subway Starts Operation", "url": "https://www.nytimes.com/1933/07/01/archives/new-bronx-subway-starts-operation-40000000-branch-of-city-system.html", "via": "https://en.wikipedia.org/wiki/IND_Concourse_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260315022450/https://nycsubway.org/wiki/History_of_the_Independent_Subway", "kind": "other", "publisher": "nycsubway.org", "quote": "On July 1st, the Concourse Line opened from 145th St. to 205th St.", "tier": "secondary", "title": "History of the Independent Subway — nycsubway.org", "url": "https://www.nycsubway.org/wiki/History_of_the_Independent_Subway", "via": "https://en.wikipedia.org/wiki/IND_Concourse_Line" } ], "stationCount": 12 }, { "closed": "2018-08", "confidence": "high", "geometryRef": null, "id": "nyc-ind-concourse-line-20181226-1", "kind": "reopening", "label": { "en": "174th–175th Streets station reopens after Enhanced Station Initiative renovation (closed ~Aug 2018)" }, "notes": "[Opening-date chase 2026-06-13] This phase is a station reopening after Enhanced Station Initiative renovation, not a new-line opening; the Dec 26, 2018 reopening is directly confirmed by the official NYCT Subway Twitter account posting on that date.", "opened": "2018-12-26", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260207233637/https://en.wikipedia.org/wiki/174th%E2%80%93175th_Streets_station", "kind": "wikipedia", "quote": "174th–175th Streets station ... reopened on December 26, 2018", "tier": "tertiary", "title": "174th–175th Streets station — Wikipedia", "url": "https://en.wikipedia.org/wiki/174th%E2%80%93175th_Streets_station" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260117221905/https://bronx.news12.com/mta-174th-175th-street-station-closed-until-december-38869556", "kind": "news", "quote": "The 174th Street and 175th Street Grand Concourse station closed Monday for the next four months", "tier": "secondary", "title": "MTA: 174th, 175th street station closed until December — News 12 Bronx", "url": "https://bronx.news12.com/mta-174th-175th-street-station-closed-until-december-38869556" }, { "accessedAt": "2026-06-13", "kind": "primary", "publisher": "New York City Transit Authority (@NYCTSubway)", "quote": "We're back! The 174-175 Sts B/D station has reopened with: Repaired platform structural steel and concrete / Replaced platform edges and repaired stairways / Added new digital wayfinding and customer information screens [posted December 26, 2018]", "tier": "primary", "title": "NYCT Subway tweet: 174-175 Sts B/D station has reopened", "url": "https://twitter.com/NYCTSubway/status/1078125737843011585", "via": "https://en.wikipedia.org/wiki/174th%E2%80%93175th_Streets_station" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260607204727/https://en.wikipedia.org/wiki/IND_Concourse_Line", "kind": "wikipedia", "quote": "The entire Concourse Line opened on July 1, 1933, less than ten months after the IND's first line, the IND Eighth Avenue Line, opened for service.", "tier": "tertiary", "title": "IND Concourse Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Concourse_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260202021901/https://www.nycsubway.org/wiki/IND_Concourse_Line", "kind": "other", "quote": "Opening Date: 7/1/1933 ... All stations opened simultaneously on July 1, 1933, indicating a single-stage opening rather than phased development.", "tier": "secondary", "title": "IND Concourse Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/IND_Concourse_Line" } ] }, { "cityId": "nyc", "color": "#0039A6", "displayNumber": "IND Rockaway Line", "id": "nyc-line-ind-rockaway-line", "name": { "en": "IND Rockaway Line" }, "phases": [ { "confidence": "medium", "constructionStart": "1952", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": false, "value": 47500000, "year": 1956 }, "notes": "City bought the existing LIRR Rockaway Beach Branch on 11 June 1952 for $8.5 million, then spent $47.5 million to rebuild and convert it for subway use (incl. fireproof Jamaica Bay crossing with two steel swing bridges and two artificial sand islands) — total acquisition + conversion ~$56 million. The $47.5M figure is the conversion/reconstruction outturn; the $8.5M acquisition is separate. [Citation chase 2026-06-11] The $47.5M conversion total is stated verbatim only in Wikipedia; of its two citations, the contemporary NYT opening-day article (June 28, 1956) is paywalled and unverified, and the Queens Gazette citation does not contain the figure (it covers the separate northern LIRR Rockaway Branch abandonment). The ERA bulletin corroborates the $8.5M acquisition and individual construction contracts but not the $47.5M total.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260406005739/https://en.wikipedia.org/wiki/IND_Rockaway_Line", "kind": "wikipedia", "quote": "On June 28, 1956, service on the line began between Euclid Avenue and Rockaway Park at 6:38 PM and between Euclid Avenue and Wavecrest at 6:48 PM.", "tier": "tertiary", "title": "IND Rockaway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Rockaway_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260406005739/https://en.wikipedia.org/wiki/IND_Rockaway_Line", "kind": "wikipedia", "quote": "the city bought the line on June 11, 1952, for $8.5 million.", "tier": "tertiary", "title": "IND Rockaway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Rockaway_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260406005739/https://en.wikipedia.org/wiki/IND_Rockaway_Line", "kind": "wikipedia", "quote": "In total, $47.5 million was spent to rebuild the line and to convert it for subway use", "tier": "tertiary", "title": "IND Rockaway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Rockaway_Line" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20241127081908/https://issuu.com/erausa/docs/2006-06-bulletin", "kind": "other", "publisher": "New York Division, Electric Railroaders' Association", "quote": "On June 11, 1952, the Rockaway Line was sold to the city for $8.5 million. … The first phase was a $2 million contract for building an embankment by dredging and pumping sand from Jamaica Bay. … A $5.5 million contract for foundations and piers and a $4.14 million contract for the superstructure were awarded.", "tier": "secondary", "title": "Fifty Years of Subway Service to the Rockaways", "url": "https://issuu.com/erausa/docs/2006-06-bulletin", "via": "https://en.wikipedia.org/wiki/IND_Rockaway_Line" } ] }, "geometryRef": "nyc-IND Rockaway Line", "id": "nyc-ind-rockaway-line-19560628-0", "kind": "initial", "label": { "en": "Line opens: Euclid Avenue → Rockaway Park / Wavecrest (former LIRR Rockaway Beach Branch converted to subway, both branches)" }, "notes": "[Date chase 2026-06-12] The 1952 constructionStart reflects the line's purchase (June 11, 1952) and immediate contract preparation for reconstruction, not an independently dated start of physical work. Wikipedia documents trestle construction underway by mid-1955 (NYT, June 30, 1955). The key ERA June 2006 bulletin (Issuu) is dead-linked (404) with no accessible Wayback copy, so 1952 as the physical-construction start is not independently verifiable; rating remains partial. [Opening-date chase 2026-06-13] Wikipedia lead text has an uncited 'June 26, 1956' that conflicts with the cited History section's June 28, 1956 (service start 6:38 PM / 6:48 PM); treated as a prose error. Contemporaneous NYTimes article dated June 28, 1956 corroborates the curated date.", "opened": "1956-06-28", "segment": { "fromStopIndex": 1, "toStopIndex": 14 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260406005739/https://en.wikipedia.org/wiki/IND_Rockaway_Line", "kind": "wikipedia", "quote": "On June 28, 1956, service on the line began between Euclid Avenue and Rockaway Park at 6:38 PM and between Euclid Avenue and Wavecrest at 6:48 PM.", "tier": "tertiary", "title": "IND Rockaway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Rockaway_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260406005739/https://en.wikipedia.org/wiki/IND_Rockaway_Line", "kind": "wikipedia", "quote": "the city bought the line on June 11, 1952, for $8.5 million.", "tier": "tertiary", "title": "IND Rockaway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Rockaway_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260406005739/https://en.wikipedia.org/wiki/IND_Rockaway_Line", "kind": "wikipedia", "quote": "In total, $47.5 million was spent to rebuild the line and to convert it for subway use", "tier": "tertiary", "title": "IND Rockaway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Rockaway_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613163115/https://timesmachine.nytimes.com/timesmachine/1956/06/28/84703811.pdf", "kind": "news", "publisher": "The New York Times", "quote": "Article dated June 28, 1956 titled 'Rockaway Trains to Operate Today' — publication date matches the curated opening date.", "tier": "secondary", "title": "Rockaway Trains to Operate Today", "url": "https://timesmachine.nytimes.com/timesmachine/1956/06/28/84703811.pdf", "via": "https://en.wikipedia.org/wiki/IND_Rockaway_Line" } ] }, { "confidence": "medium", "geometryRef": "nyc-IND Rockaway Line", "id": "nyc-ind-rockaway-line-19580116-1", "kind": "extension", "label": { "en": "Far Rockaway branch completed: Far Rockaway–Mott Avenue station opens (replacing temporary Wavecrest terminal)" }, "opened": "1958-01-16", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260406005739/https://en.wikipedia.org/wiki/IND_Rockaway_Line", "kind": "wikipedia", "quote": "A new station at Far Rockaway–Mott Avenue opened on January 16, 1958, completing the Rockaway Line.", "tier": "tertiary", "title": "IND Rockaway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Rockaway_Line" }, { "accessedAt": "2026-06-13", "kind": "news", "publisher": "The New York Times", "quote": "Article dated January 16, 1958 titled 'New Subway Unit Ready: Far Rockaway IND Terminal Will Be Opened Today' — publication date matches the curated opening date.", "tier": "secondary", "title": "New Subway Unit Ready: Far Rockaway IND Terminal Will Be Opened Today", "url": "https://timesmachine.nytimes.com/timesmachine/1958/01/16/83388071.pdf", "via": "https://en.wikipedia.org/wiki/IND_Rockaway_Line" } ], "stationCount": 1 }, { "closed": "2012-10-29", "confidence": "medium", "geometryRef": null, "id": "nyc-ind-rockaway-line-20130530-2", "kind": "reopening", "label": { "en": "Hurricane Sandy closure and reopening: Jamaica Bay segment rebuilt, H shuttle (20 Nov 2012) then full A service restored" }, "notes": "Hurricane Sandy (29 Oct 2012) severely damaged the Jamaica Bay crossing. A free shuttle designated H began 20 Nov 2012 serving the Rockaway peninsula portion during repairs; full A service was restored 30 May 2013. [Opening-date chase 2026-06-13] May 30, 2013 is the full revenue A-service restoration, distinct from the free interim H shuttle that began November 20, 2012; the curated phase correctly captures the full-service date.", "opened": "2013-05-30", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260406005739/https://en.wikipedia.org/wiki/IND_Rockaway_Line", "kind": "wikipedia", "quote": "On November 20, 2012, a free shuttle designated as H replaced the Rockaway portion of the A service", "tier": "tertiary", "title": "IND Rockaway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Rockaway_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260406005739/https://en.wikipedia.org/wiki/IND_Rockaway_Line", "kind": "wikipedia", "quote": "On May 30, 2013, full service was restored.", "tier": "tertiary", "title": "IND Rockaway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Rockaway_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613163141/https://www.cbsnews.com/newyork/news/a-train-service-resumes-in-rockaways-today/", "kind": "news", "publisher": "CBS New York", "quote": "Published May 30, 2013 at 2:00 PM EDT; title says 'Today'; article reports the first train left Howard Beach at about 10:30 a.m. and normal A/S service resumed around noon on publication day.", "tier": "secondary", "title": "After Seven Months, A Train Subway Service Resumes In Rockaways", "url": "https://www.cbsnews.com/newyork/news/a-train-service-resumes-in-rockaways-today/", "via": "https://en.wikipedia.org/wiki/IND_Rockaway_Line" } ] }, { "closed": "2025-01-17", "confidence": "high", "geometryRef": null, "id": "nyc-ind-rockaway-line-20250519-3", "kind": "reopening", "label": { "en": "2025 viaduct reconstruction closure and reopening: Howard Beach → peninsula suspended 17 weeks" }, "notes": "Service between Howard Beach and the Rockaway peninsula was suspended for 17 weeks to reconstruct ~1,600 ft of viaduct (incl. South Channel Bridge and Hammels Wye); fare-free shuttle ran between Rockaway Park and Far Rockaway. Regular service resumed 19 May 2025.", "opened": "2025-05-19", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260406005739/https://en.wikipedia.org/wiki/IND_Rockaway_Line", "kind": "wikipedia", "quote": "service between Howard Beach and the peninsula was suspended for 17 weeks starting January 17, 2025", "tier": "tertiary", "title": "IND Rockaway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Rockaway_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260406005739/https://en.wikipedia.org/wiki/IND_Rockaway_Line", "kind": "wikipedia", "quote": "Regular service resumed on May 19, 2025.", "tier": "tertiary", "title": "IND Rockaway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Rockaway_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613163224/https://www.cbsnews.com/newyork/news/rockaways-a-train-resumes-service-new-york/", "kind": "news", "publisher": "CBS New York", "quote": "A train service officially resumed operations to the Rockaways on May 19, 2025, with trains departing from Mott Avenue station after a four-month shutdown for repairs.", "tier": "secondary", "title": "A train service to Rockaways resumes after 4 month shutdown for repairs", "url": "https://www.cbsnews.com/newyork/news/rockaways-a-train-resumes-service-new-york/", "via": "https://en.wikipedia.org/wiki/IND_Rockaway_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260521014123/https://www.rockawaytimes.com/a-train-shutdown-tops-september-cb14-meeting/", "kind": "news", "publisher": "THE ROCKAWAY TIMES", "quote": "The shutdown of A and Shuttle service from Rockaway to Howard Beach starting January 17 through Monday, May 19, 2025.", "tier": "secondary", "title": "A Train Shutdown Tops September CB14 Meeting", "url": "https://www.rockawaytimes.com/a-train-shutdown-tops-september-cb14-meeting/", "via": "https://en.wikipedia.org/wiki/IND_Rockaway_Line" } ] }, { "confidence": "low", "geometryRef": "nyc-IND Rockaway Line#2", "id": "nyc-ind-rockaway-line-19560628-spur", "kind": "extension", "label": { "en": "Rockaway Park spur opens (Hammels Wye → Rockaway Park–Beach 116th St)" }, "notes": "Same 1956 conversion of the LIRR Rockaway Beach Branch; the Rockaway Park spur opened with the Far Rockaway trunk. No separate cost (shared with the main Rockaway Line opening). [Opening-date chase 2026-06-13] Spur opening coincides with the main line opening on June 28, 1956 (service to Rockaway Park began at 6:38 PM).", "opened": "1956-06-28", "segment": { "fromStopIndex": 0, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260406005739/https://en.wikipedia.org/wiki/IND_Rockaway_Line", "kind": "wikipedia", "quote": "On June 28, 1956, service on the line began between Euclid Avenue and Rockaway Park at 6:38 PM and between Euclid Avenue and Wavecrest at 6:48 PM.", "tier": "tertiary", "title": "IND Rockaway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Rockaway_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260406005739/https://en.wikipedia.org/wiki/IND_Rockaway_Line", "kind": "wikipedia", "quote": "the city bought the line on June 11, 1952, for $8.5 million.", "tier": "tertiary", "title": "IND Rockaway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Rockaway_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260406005739/https://en.wikipedia.org/wiki/IND_Rockaway_Line", "kind": "wikipedia", "quote": "In total, $47.5 million was spent to rebuild the line and to convert it for subway use", "tier": "tertiary", "title": "IND Rockaway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Rockaway_Line" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260406005739/https://en.wikipedia.org/wiki/IND_Rockaway_Line", "kind": "wikipedia", "quote": "On June 28, 1956, service on the line began between Euclid Avenue and Rockaway Park at 6:38 PM and between Euclid Avenue and Wavecrest at 6:48 PM.", "tier": "tertiary", "title": "IND Rockaway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Rockaway_Line" } ] }, { "cityId": "nyc", "color": "#0039A6", "displayNumber": "IND Archer Avenue Line", "id": "nyc-line-ind-archer-avenue-line", "name": { "en": "IND Archer Avenue Line" }, "phases": [ { "confidence": "high", "constructionStart": "1973", "cost": { "basis": "outturn", "confidence": "low", "nominal": { "currency": "USD", "isEstimate": false, "value": 465000000, "year": 1988 }, "notes": "Final outturn cost of the entire Archer Avenue project (the upper IND level used by E/J trains and the lower BMT level used by J/Z trains share this single construction project, so the figure covers both levels, not the IND level alone). Described as nearly five times the original budgeted cost. An earlier mid-construction project figure was $242 million ($162M paid by NYC, remainder by NY State). Price-level year not explicitly stated by source; treated as nominal. [Citation chase 2026-06-11] The $465M final-cost figure rests on a single Wikipedia inline citation (NY Daily News, Dec 15, 1991) that could not be verified directly (newspapers.com returns HTTP 403/paywall); the contemporaneous NYT (Dec 9, 1988) corroborates the \"nearly five times original budget\" framing but not the specific dollar value.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260516144136/https://en.wikipedia.org/wiki/Archer_Avenue_lines", "kind": "wikipedia", "quote": "The line opened on December 11, 1988, at a cost of nearly five times its original budgeted cost and cut back to a length of 2 miles (3 km).", "tier": "tertiary", "title": "Archer Avenue lines — Wikipedia", "url": "https://en.wikipedia.org/wiki/Archer_Avenue_lines" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260516144136/https://en.wikipedia.org/wiki/Archer_Avenue_lines", "kind": "wikipedia", "quote": "Construction on the Archer Avenue subway began on October 23, 1973, at 159th Street and Beaver Road, just south of Archer Avenue.", "tier": "tertiary", "title": "Archer Avenue lines — Wikipedia", "url": "https://en.wikipedia.org/wiki/Archer_Avenue_lines" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260516144136/https://en.wikipedia.org/wiki/Archer_Avenue_lines", "kind": "wikipedia", "quote": "The project's final cost was $465 million.", "tier": "tertiary", "title": "Archer Avenue lines — Wikipedia", "url": "https://en.wikipedia.org/wiki/Archer_Avenue_lines" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260516144136/https://en.wikipedia.org/wiki/Archer_Avenue_lines", "kind": "wikipedia", "quote": "$162 million of the $242 million project was paid for by the city, with the state footing the remainder of the bill.", "tier": "tertiary", "title": "Archer Avenue lines — Wikipedia", "url": "https://en.wikipedia.org/wiki/Archer_Avenue_lines" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20251021121001/https://www.nytimes.com/1988/12/09/nyregion/big-changes-for-subways-are-to-begin.html", "kind": "news", "publisher": "The New York Times", "tier": "secondary", "title": "Big Changes For Subways Are to Begin", "url": "https://www.nytimes.com/1988/12/09/nyregion/big-changes-for-subways-are-to-begin.html", "via": "https://en.wikipedia.org/wiki/Archer_Avenue_lines" } ] }, "geometryRef": "nyc-IND Archer Avenue Line", "id": "nyc-ind-archer-avenue-line-19881211-0", "kind": "initial", "label": { "en": "Line opens: Jamaica–Van Wyck → Jamaica Center–Parsons/Archer (entire Archer Avenue Line, all 3 stations)" }, "notes": "[Date chase 2026-06-12] A ceremonial groundbreaking occurred August 15, 1972 at Archer Avenue and 151st Street, but Wikipedia distinguishes this from actual construction, which began October 23, 1973 at 159th Street and Beaver Road, per contemporaneous NYT reporting (Burks, 'Work Begun on Queens Subway Extension,' Oct 24 1973). [Opening-date chase 2026-06-13] Opening date is corroborated at full day granularity by primary operator sources: the NYCTA 'Welcome Aboard' newsletter titled 'Archer Avenue Extension Opens December 11' and the official NYCTA service-change pamphlet naming 'Sunday, December 11th'. No ceremonial-vs-revenue split exists; the entire line (all 3 stations) opened to revenue service simultaneously on 1988-12-11.", "opened": "1988-12-11", "segment": { "fromStopIndex": 0, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260516144136/https://en.wikipedia.org/wiki/Archer_Avenue_lines", "kind": "wikipedia", "quote": "The line opened on December 11, 1988, at a cost of nearly five times its original budgeted cost and cut back to a length of 2 miles (3 km).", "tier": "tertiary", "title": "Archer Avenue lines — Wikipedia", "url": "https://en.wikipedia.org/wiki/Archer_Avenue_lines" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260516144136/https://en.wikipedia.org/wiki/Archer_Avenue_lines", "kind": "wikipedia", "quote": "Construction on the Archer Avenue subway began on October 23, 1973, at 159th Street and Beaver Road, just south of Archer Avenue.", "tier": "tertiary", "title": "Archer Avenue lines — Wikipedia", "url": "https://en.wikipedia.org/wiki/Archer_Avenue_lines" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260516144136/https://en.wikipedia.org/wiki/Archer_Avenue_lines", "kind": "wikipedia", "quote": "The project's final cost was $465 million.", "tier": "tertiary", "title": "Archer Avenue lines — Wikipedia", "url": "https://en.wikipedia.org/wiki/Archer_Avenue_lines" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260516144136/https://en.wikipedia.org/wiki/Archer_Avenue_lines", "kind": "wikipedia", "quote": "$162 million of the $242 million project was paid for by the city, with the state footing the remainder of the bill.", "tier": "tertiary", "title": "Archer Avenue lines — Wikipedia", "url": "https://en.wikipedia.org/wiki/Archer_Avenue_lines" }, { "accessedAt": "2026-06-12", "kind": "news", "publisher": "The New York Times", "quote": "Wikipedia cites this article (Burks, Edward C., October 24, 1973) as the source for: \"Construction on the Archer Avenue subway began on October 23, 1973, at 159th Street and Beaver Road, just south of Archer Avenue.\" Direct access to the article is blocked (timesmachine paywall).", "tier": "primary", "title": "Work Begun on Queens Subway Extension", "url": "https://timesmachine.nytimes.com/timesmachine/1973/10/24/80809618.pdf", "via": "https://en.wikipedia.org/wiki/Archer_Avenue_lines" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251021121001/https://www.nytimes.com/1988/12/09/nyregion/big-changes-for-subways-are-to-begin.html", "kind": "news", "publisher": "The New York Times", "quote": "Wikipedia renders: 'the lines did not open until December 11, 1988' — this Kirk Johnson article (Dec 9, 1988) is the primary citation for that statement; direct access blocked by paywall.", "tier": "secondary", "title": "Big Changes For Subways Are to Begin", "url": "https://www.nytimes.com/1988/12/09/nyregion/big-changes-for-subways-are-to-begin.html", "via": "https://en.wikipedia.org/wiki/Archer_Avenue_lines" } ], "stationCount": 3 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260516144136/https://en.wikipedia.org/wiki/Archer_Avenue_lines", "kind": "wikipedia", "quote": "The line opened on December 11, 1988, at a cost of nearly five times its original budgeted cost and cut back to a length of 2 miles (3 km).", "tier": "tertiary", "title": "Archer Avenue lines — Wikipedia", "url": "https://en.wikipedia.org/wiki/Archer_Avenue_lines" } ] }, { "cityId": "nyc", "color": "#996633", "displayNumber": "BMT Archer Avenue Line", "id": "nyc-line-bmt-archer-avenue-line", "name": { "en": "BMT Archer Avenue Line" }, "phases": [ { "confidence": "high", "constructionStart": "1973", "geometryRef": "nyc-BMT Archer Avenue Line", "id": "nyc-bmt-archer-avenue-line-19881211-0", "kind": "initial", "label": { "en": "Archer Avenue Line opens: 121st Street → Jamaica Center–Parsons/Archer (BMT lower level, J train extension)" }, "notes": "[Date chase 2026-06-12] Precise construction start was October 23, 1973 (NYT Oct 24 1973, 'Work Begun on Queens Subway Extension', Burks). A separate August 15, 1972 groundbreaking ceremony predates this but is distinguished by Wikipedia from the actual start of construction. [Opening-date chase 2026-06-13] VIP/dedication ceremony and non-revenue public station previews were held the afternoon of Dec 10, 1988; the first revenue J train ran just before midnight Dec 10 (technically the last run of Dec 10), with full public revenue service (skip-stop J/Z, E service, bus reroutes) launching Sunday Dec 11, 1988 per NYCTA's own announcement.", "opened": "1988-12-11", "segment": { "fromStopIndex": 0, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260516144136/https://en.wikipedia.org/wiki/Archer_Avenue_lines", "kind": "wikipedia", "quote": "The line opened on December 11, 1988, at a cost of nearly five times its original budgeted cost and cut back to a length of 2 miles (3 km).", "tier": "tertiary", "title": "Archer Avenue lines — Wikipedia", "url": "https://en.wikipedia.org/wiki/Archer_Avenue_lines" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260530160446/https://en.wikipedia.org/wiki/J/Z_(New_York_City_Subway_service)", "kind": "wikipedia", "quote": "The BMT Archer Avenue Line was scheduled to open on December 11, 1988, extending the J east from 121st Street to Jamaica Center–Parsons/Archer. The Z designation, along with the present J/Z skip-stop service pattern, would be introduced the following day.", "tier": "tertiary", "title": "J/Z (New York City Subway service) — Wikipedia", "url": "https://en.wikipedia.org/wiki/J/Z_(New_York_City_Subway_service)" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260516144124/https://en.wikipedia.org/wiki/BMT_Archer_Avenue_Line", "kind": "wikipedia", "quote": "Construction on the line started in 1973, and the project was expected to be completed in 1980 ... Due to financial issues and concern about the quality of the construction, the lines did not open until December 11, 1988.", "tier": "tertiary", "title": "BMT Archer Avenue Line / Archer Avenue lines — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Archer_Avenue_Line" }, { "accessedAt": "2026-06-12", "kind": "news", "publisher": "The New York Times", "quote": "Construction on the Archer Avenue subway began on October 23, 1973, at 159th Street and Beaver Road, just south of Archer Avenue. [Wikipedia's Construction section cites this article for that statement; the article is dated October 24, 1973 and bylined Edward C. Burks]", "tier": "primary", "title": "Work Begun on Queens Subway Extension", "url": "https://timesmachine.nytimes.com/timesmachine/1973/10/24/80809618.pdf", "via": "https://en.wikipedia.org/wiki/Archer_Avenue_lines" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20251021121001/https://www.nytimes.com/1988/12/09/nyregion/big-changes-for-subways-are-to-begin.html", "kind": "news", "publisher": "The New York Times", "quote": "Wikipedia's lead section cites this December 9, 1988 Kirk Johnson article (ref :02) as supporting 'Construction on the line started in 1973'", "tier": "secondary", "title": "Big Changes For Subways Are to Begin", "url": "https://www.nytimes.com/1988/12/09/nyregion/big-changes-for-subways-are-to-begin.html", "via": "https://en.wikipedia.org/wiki/Archer_Avenue_lines" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260206100045/https://erausa.org/pdf/bulletin/2000s/2008/2008-12-bulletin.pdf", "kind": "other", "publisher": "Electric Railroaders' Association", "quote": "Revenue operation in the new Archer Avenue Subway began on Saturday, December 10, 1988 shortly before midnight. The first J train arrived at Parsons-Archer at 11:42 PM and departed at 11:53 PM. The first E train followed at midnight. ... Ceremonies were held on December 10, 1988, the afternoon before revenue service began. An eight-car R-46 Special VIP Train departed from Chambers Street IND at 9:33 AM ... From 1 to 3 PM, the new stations were opened to the public. ... When service was extended to Parsons-Archer on December 11, 1988, NYC Transit operated rush hour skip-stop J/Z trains.", "tier": "secondary", "title": "Archer Avenue Subway Opened 20 Years Ago — The Bulletin, Electric Railroaders' Association, December 2008", "url": "https://erausa.org/pdf/bulletin/2000s/2008/2008-12-bulletin.pdf", "via": "https://en.wikipedia.org/wiki/J/Z_(New_York_City_Subway_service)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251119164129/https://www.flickr.com/photos/127872292@N06/27699872706/", "kind": "primary", "publisher": "New York City Transit Authority", "quote": "System-Wide Changes In Subway Service Effective Sunday, December 11, 1988 [title of NYCTA official document announcing service changes]", "tier": "primary", "title": "System-Wide Changes In Subway Service Effective Sunday, December 11, 1988 — New York City Transit Authority", "url": "https://www.flickr.com/photos/127872292@N06/27699872706/", "via": "https://en.wikipedia.org/wiki/J/Z_(New_York_City_Subway_service)" } ], "stationCount": 2 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260516144136/https://en.wikipedia.org/wiki/Archer_Avenue_lines", "kind": "wikipedia", "quote": "The line opened on December 11, 1988, at a cost of nearly five times its original budgeted cost and cut back to a length of 2 miles (3 km).", "tier": "tertiary", "title": "Archer Avenue lines — Wikipedia", "url": "https://en.wikipedia.org/wiki/Archer_Avenue_lines" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260530160446/https://en.wikipedia.org/wiki/J/Z_(New_York_City_Subway_service)", "kind": "wikipedia", "quote": "The BMT Archer Avenue Line was scheduled to open on December 11, 1988, extending the J east from 121st Street to Jamaica Center–Parsons/Archer. The Z designation, along with the present J/Z skip-stop service pattern, would be introduced the following day.", "tier": "tertiary", "title": "J/Z (New York City Subway service) — Wikipedia", "url": "https://en.wikipedia.org/wiki/J/Z_(New_York_City_Subway_service)" } ] }, { "cityId": "nyc", "color": "#6CBE45", "displayNumber": "IND Crosstown Line", "id": "nyc-line-ind-crosstown-line", "name": { "en": "IND Crosstown Line" }, "phases": [ { "confidence": "high", "constructionStart": "1928", "cost": { "basis": "estimate", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": true, "value": 15000000, "year": 1928 }, "notes": "Figure covers the THREE construction contracts for the Greenpoint Section (over five miles of track) of the Crosstown Line, NOT this opened segment alone; from a 22 Jan 1928 NYT headline projecting the work would 'cost over $15,000,000'. It is a pre-construction estimate, not a final outturn. New stations opened in this 1933 stage: Court Square, 21st Street, Greenpoint Avenue, Nassau Avenue. The GG reached Queens Plaza via the flying junction with the IND Queens Boulevard Line just south of Queens Plaza. [Citation chase 2026-06-11] The $15M derives solely from the NYT headline metadata (the 22 Jan 1928 article body is paywalled; only the headline was verifiable via the Wayback snapshot), and it is a forward-looking estimate for the broader Greenpoint Section contracts rather than the cost of the segment opened in 1933.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124606/https://en.wikipedia.org/wiki/IND_Crosstown_Line", "kind": "wikipedia", "quote": "On August 19, 1933, the line was opened north of Nassau Avenue, and the GG began operation to Queens Plaza.", "tier": "tertiary", "title": "IND Crosstown Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Crosstown_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124606/https://en.wikipedia.org/wiki/IND_Crosstown_Line", "kind": "wikipedia", "quote": "The first contract to build the Crosstown Line, for a section north of Nassau Avenue in Brooklyn, was awarded in 1928.", "tier": "tertiary", "title": "IND Crosstown Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Crosstown_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124606/https://en.wikipedia.org/wiki/IND_Crosstown_Line", "kind": "news", "quote": "Three Contracts for Work in the Greenpoint Section for Over Five Miles of Track. WILL COST OVER $15,000,000", "tier": "secondary", "title": "IND Crosstown Line — Wikipedia (citing NYT headline, 22 Jan 1928)", "url": "https://en.wikipedia.org/wiki/IND_Crosstown_Line" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20241227151049/https://www.nytimes.com/1928/01/22/archives/subway-extensions-for-long-island-three-contracts-for-work-in-the.html", "kind": "news", "publisher": "The New York Times", "quote": "SUBWAY EXTENSIONS FOR LONG ISLAND; Three Contracts for Work in the Greenpoint Section for Over Five Miles of Track. WILL COST-OVER $15,000,000", "tier": "primary", "title": "SUBWAY EXTENSIONS FOR LONG ISLAND; Three Contracts for Work in the Greenpoint Section for Over Five Miles of Track. WILL COST-OVER $15,000,000 The New Fifty-third Street Terminal Under East River Now 45Per Cent. Completed.", "url": "https://www.nytimes.com/1928/01/22/archives/subway-extensions-for-long-island-three-contracts-for-work-in-the.html", "via": "https://en.wikipedia.org/wiki/IND_Crosstown_Line" } ] }, "geometryRef": "nyc-IND Crosstown Line", "id": "nyc-ind-crosstown-line-19330819-0", "kind": "initial", "label": { "en": "Stage 1 opens: Nassau Avenue (north) → Court Square / Queens Plaza (GG to Queens Plaza)" }, "notes": "[Date chase 2026-06-12] First construction contract (Greenpoint section, north of Nassau Avenue) awarded ~January 1928 per NYT (22 Jan 1928); both the NYT and the contemporaneous source are paywalled, so no sub-year construction-start precision is attainable from public sources. Year 1928 stands. [Opening-date chase 2026-06-13] This was a midnight revenue-service opening into August 19, 1933 (NYT headline 'Two Subway Units Open at Midnight'); no separate ceremonial date — the curated date reflects actual passenger service commencement.", "opened": "1933-08-19", "segment": { "fromStopIndex": 0, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124606/https://en.wikipedia.org/wiki/IND_Crosstown_Line", "kind": "wikipedia", "quote": "On August 19, 1933, the line was opened north of Nassau Avenue, and the GG began operation to Queens Plaza.", "tier": "tertiary", "title": "IND Crosstown Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Crosstown_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124606/https://en.wikipedia.org/wiki/IND_Crosstown_Line", "kind": "wikipedia", "quote": "The first contract to build the Crosstown Line, for a section north of Nassau Avenue in Brooklyn, was awarded in 1928.", "tier": "tertiary", "title": "IND Crosstown Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Crosstown_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124606/https://en.wikipedia.org/wiki/IND_Crosstown_Line", "kind": "news", "quote": "Three Contracts for Work in the Greenpoint Section for Over Five Miles of Track. WILL COST OVER $15,000,000", "tier": "secondary", "title": "IND Crosstown Line — Wikipedia (citing NYT headline, 22 Jan 1928)", "url": "https://en.wikipedia.org/wiki/IND_Crosstown_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20241227151049/https://www.nytimes.com/1928/01/22/archives/subway-extensions-for-long-island-three-contracts-for-work-in-the.html", "kind": "news", "publisher": "The New York Times", "quote": "Three Contracts for Work in the Greenpoint Section for Over Five Miles of Track. WILL COST OVER $15,000,000", "tier": "secondary", "title": "SUBWAY EXTENSIONS FOR LONG ISLAND; Three Contracts for Work in the Greenpoint Section for Over Five Miles of Track. WILL COST OVER $15,000,000", "url": "https://www.nytimes.com/1928/01/22/archives/subway-extensions-for-long-island-three-contracts-for-work-in-the.html", "via": "https://en.wikipedia.org/wiki/IND_Crosstown_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260508023638/https://www.newspapers.com/image/59882699/?terms=%22subway%22%2B%22court%22%2B%22bond%2Bst%22", "kind": "news", "publisher": "Brooklyn Daily Eagle", "quote": "Newtown Creek Tunnel First Tube of Kind Bored Without Compressed Air", "tier": "secondary", "title": "Newtown Creek Tunnel First Tube of Kind Bored Without Compressed Air", "url": "https://www.newspapers.com/image/59882699/?terms=%22subway%22%2B%22court%22%2B%22bond%2Bst%22", "via": "https://en.wikipedia.org/wiki/IND_Crosstown_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613162917/https://timesmachine.nytimes.com/timesmachine/1933/08/18/99841892.html?pdf_redirect=true&site=false", "kind": "news", "publisher": "The New York Times", "quote": "Two Subway Units Open at Midnight – Links in City-Owned System in Queens and Brooklyn to Have 15 Stations (article dated August 18, 1933, previewing midnight opening into August 19)", "tier": "secondary", "title": "Two Subway Units Open at Midnight – Links in City-Owned System in Queens and Brooklyn to Have 15 Stations", "url": "https://timesmachine.nytimes.com/timesmachine/1933/08/18/99841892.pdf", "via": "https://en.wikipedia.org/wiki/IND_Crosstown_Line" } ], "stationCount": 4 }, { "confidence": "medium", "geometryRef": "nyc-IND Crosstown Line", "id": "nyc-ind-crosstown-line-19370701-1", "kind": "extension", "label": { "en": "Stage 2 opens: Nassau Avenue (south) → Hoyt–Schermerhorn Streets — entire Crosstown Line completed and connected to the IND Culver Line; GG extended to Smith–Ninth Streets and Forest Hills–71st Avenue" }, "notes": "[Opening-date chase 2026-06-13] Stage 2 completed the full Crosstown Line and connected it to the IND Culver Line on July 1, 1937; no evidence of a prior ceremonial opening distinct from revenue service.", "opened": "1937-07-01", "segment": { "fromStopIndex": 2, "toStopIndex": 18 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124606/https://en.wikipedia.org/wiki/IND_Crosstown_Line", "kind": "wikipedia", "quote": "The entire Crosstown Line was completed and connected to the IND Culver Line on July 1, 1937, whereupon the GG was extended in both directions to Smith–Ninth Streets and Forest Hills–71st Avenue.", "tier": "tertiary", "title": "IND Crosstown Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Crosstown_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260508023638/https://bklyn.newspapers.com/image/52688792/?terms=crosstown%2Bsubway", "kind": "news", "publisher": "Brooklyn Daily Eagle", "quote": "New Crosstown Subway Line Is Opened (article dated July 1, 1937)", "tier": "secondary", "title": "New Crosstown Subway Line Is Opened", "url": "https://bklyn.newspapers.com/image/52688792/?terms=crosstown%2Bsubway", "via": "https://en.wikipedia.org/wiki/IND_Crosstown_Line" } ], "stationCount": 9 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124606/https://en.wikipedia.org/wiki/IND_Crosstown_Line", "kind": "wikipedia", "quote": "On August 19, 1933, the line was opened north of Nassau Avenue, and the GG began operation to Queens Plaza.", "tier": "tertiary", "title": "IND Crosstown Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Crosstown_Line" } ] }, { "cityId": "nyc", "color": "#0039A6", "displayNumber": "IND Fulton Street Line", "id": "nyc-line-ind-fulton-street-line", "name": { "en": "IND Fulton Street Line" }, "phases": [ { "confidence": "high", "constructionStart": "1929", "geometryRef": "nyc-IND Fulton Street Line", "id": "nyc-ind-fulton-street-line-19360409-0", "kind": "initial", "label": { "en": "Initial opening: Jay Street → Rockaway Avenue (incl. Court Street stub terminal)" }, "notes": "Construction broke ground 16 April 1929. The 9 April 1936 opening comprised 10 through-running stations (Jay Street–MetroTech, Hoyt–Schermerhorn Streets, Lafayette Avenue, Clinton–Washington Avenues, Franklin Avenue, Nostrand Avenue, Kingston–Throop Avenues, Utica Avenue, Ralph Avenue, Rockaway Avenue) plus the Court Street stub-terminal station served by a shuttle — hence 11 stations total. Rockaway Avenue was the through-line terminal. Funded in part by the federal Public Works Administration (PWA). [Date chase 2026-06-12] Groundbreaking date April 16, 1929 is primary-sourced to a Brooklyn Daily Eagle article (April 17, 1929, paywalled on Newspapers.com) cited within the Wikipedia article. [Opening-date chase 2026-06-13] Opening was an overnight ceremonial run beginning the night of Wed Apr 8, with revenue service recorded as Apr 9, 1936; the Jay St–MetroTech station itself opened earlier (Feb 1, 1933) with the IND Eighth Avenue Line, while the Fulton local platforms and the run east to Rockaway Ave opened Apr 9, 1936.", "opened": "1936-04-09", "segment": { "fromStopIndex": 0, "toStopIndex": 10 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124552/https://en.wikipedia.org/wiki/IND_Fulton_Street_Line", "kind": "wikipedia", "quote": "The line was opened from Jay Street to Rockaway Avenue on April 9, 1936, including the stub terminal at Court Street.", "tier": "tertiary", "title": "IND Fulton Street Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Fulton_Street_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124552/https://en.wikipedia.org/wiki/IND_Fulton_Street_Line", "kind": "wikipedia", "quote": "The groundbreaking for the line was held on April 16, 1929, at Fulton Street and Arlington Place, near the future Nostrand Avenue station.", "tier": "tertiary", "title": "IND Fulton Street Line — Wikipedia (groundbreaking)", "url": "https://en.wikipedia.org/wiki/IND_Fulton_Street_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260511031425/https://www.newspapers.com/image/59879473/?terms=%22Crosstown%22%2B%22subway%22%2B%22schermerhorn%22", "kind": "news", "publisher": "Brooklyn Daily Eagle", "quote": "Ground is Broken For Subway Line Along Fulton St.; Byrne Turns First Spade of Arlington Pl. Earth as Merchants Applaud. [April 17, 1929 — reporting on groundbreaking held April 16, 1929]", "tier": "primary", "title": "New Fulton Street Subway Officially Started as Byrne Turns Earth; Ground is Broken For Subway Line Along Fulton St.; Byrne Turns First Spade of Arlington Pl. Earth as Merchants Applaud.", "url": "https://www.newspapers.com/image/59879473/?terms=%22Crosstown%22%2B%22subway%22%2B%22schermerhorn%22", "via": "https://en.wikipedia.org/wiki/IND_Fulton_Street_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250616044219/https://www.nytimes.com/1936/04/06/archives/two-subway-links-start-wednesday-city-will-begin-operating-fulton.html", "kind": "news", "publisher": "The New York Times", "quote": "Two Subway Links Start Wednesday [published April 6, 1936, announcing service beginning Wednesday April 8 night/into April 9, 1936]", "tier": "secondary", "title": "Two Subway Links Start Wednesday", "url": "https://www.nytimes.com/1936/04/06/archives/two-subway-links-start-wednesday-city-will-begin-operating-fulton.html", "via": "https://en.wikipedia.org/wiki/IND_Fulton_Street_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250822223018/https://www.nytimes.com/1936/04/09/archives/new-subway-link-opened-by-mayor-he-tells-15000-in-brooklyn-it-will.html", "kind": "news", "publisher": "The New York Times", "quote": "New Subway Link Opened By Mayor [dated April 9, 1936 — day-of reporting on the opening]", "tier": "secondary", "title": "New Subway Link Opened By Mayor; He Tells 15,000 in Brooklyn It Will Be Extended to Queens When Red Tape Is Cut.", "url": "https://www.nytimes.com/1936/04/09/archives/new-subway-link-opened-by-mayor-he-tells-15000-in-brooklyn-it-will.html", "via": "https://en.wikipedia.org/wiki/IND_Fulton_Street_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260517134348/https://www.newspapers.com/image/52660008/?terms=%22hoyt%2Bschermerhorn%22%2B%22station%22", "kind": "news", "publisher": "Brooklyn Daily Eagle", "quote": "Brooklyn's New $53,000,000 Subway Line Ready to Open Wednesday Night [April 5, 1936 — 'Wednesday night' = night of April 8/into April 9, 1936; revenue service date is April 9]", "tier": "secondary", "title": "Brooklyn's New $53,000,000 Subway Line Ready to Open Wednesday Night", "url": "https://www.newspapers.com/image/52660008/?terms=%22hoyt%2Bschermerhorn%22%2B%22station%22", "via": "https://en.wikipedia.org/wiki/Hoyt%E2%80%93Schermerhorn_Streets_station" } ], "stationCount": 11 }, { "confidence": "high", "geometryRef": "nyc-IND Fulton Street Line", "id": "nyc-ind-fulton-street-line-19461230-2", "kind": "extension", "label": { "en": "Extension: Rockaway Avenue → Broadway–East New York (Broadway Junction)" }, "notes": "Added a single station, Broadway–East New York (today's Broadway Junction), as a new, more efficient terminal. [Opening-date chase 2026-06-13] This phase has the weakest directly-accessible primary sourcing of the four; the Dec 30, 1946 date rests on two independent Wikipedia articles plus a paywalled Board of Transportation 1949 report. WWII material shortages delayed the extension.", "opened": "1946-12-30", "segment": { "fromStopIndex": 10, "toStopIndex": 11 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124552/https://en.wikipedia.org/wiki/IND_Fulton_Street_Line", "kind": "wikipedia", "quote": "The badly needed extension to the more efficient terminal at Broadway−East New York (the current Broadway Junction station) opened on December 30, 1946.", "tier": "tertiary", "title": "IND Fulton Street Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Fulton_Street_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250818080315/https://babel.hathitrust.org/cgi/pt?id=mdp.39015023094926", "kind": "primary", "publisher": "New York City Board of Transportation", "quote": "[Cited by Wikipedia as a source for the December 30, 1946 opening date; document is a government primary source but is paywalled/login-required at HathiTrust — content not directly verified]", "tier": "primary", "title": "Report for the three and one-half years ending June 30, 1949.", "url": "https://babel.hathitrust.org/cgi/pt?id=mdp.39015023094926", "via": "https://en.wikipedia.org/wiki/IND_Fulton_Street_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260508004006/https://www.newspapers.com/image/57726129/?terms=euclid%2Bpitkin%2Bsubway", "kind": "news", "publisher": "Brooklyn Daily Eagle", "quote": "[June 9, 1946 article about wartime material shortages delaying the extension — cited as context source; does not directly state the December 30 opening date]", "tier": "secondary", "title": "Shortages Snarl $50,000,000 Tube Links", "url": "https://www.newspapers.com/image/57726129/?terms=euclid%2Bpitkin%2Bsubway", "via": "https://en.wikipedia.org/wiki/Broadway_Junction_station" } ], "stationCount": 1 }, { "confidence": "high", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": true, "value": 46500000, "year": 1948 }, "notes": "Wikipedia states the cost of the extension was 'about $46.5 million'; figure includes the Pitkin Yard (585-car capacity) built as part of the project. [Citation chase 2026-06-11] Figure is the actual (outturn) cost, not a forecast — the citing BOT 1949 report and the Brooklyn Daily Eagle's day-after headline ($47,000,000, consistent with $46.5M rounded) both postdate the Nov 28, 1948 opening. The exact $46.5M figure could not be confirmed in full text (key sources paywalled/Cloudflare-blocked); the 1946 \"$50,000,000\" was a superseded in-progress estimate.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124552/https://en.wikipedia.org/wiki/IND_Fulton_Street_Line", "kind": "wikipedia", "quote": "The extension of the Fulton Street Line...was placed in operation on November 28, 1948, running along Pennsylvania Avenue and Pitkin Avenue to Euclid Avenue...The cost of the extension was about $46.5 million.", "tier": "tertiary", "title": "IND Fulton Street Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Fulton_Street_Line" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20260412171755/https://www.newspapers.com/image/52882609/?terms=euclid%2Bpitkin%2Bsubway", "kind": "news", "publisher": "Brooklyn Daily Eagle (November 29, 1948, p. 2)", "quote": "Trains Roll on $47,000,000 Fulton St. Subway Extension", "tier": "primary", "title": "Trains Roll on $47,000,000 Fulton St. Subway Extension", "url": "https://www.newspapers.com/image/52882609/?terms=euclid%2Bpitkin%2Bsubway", "via": "https://en.wikipedia.org/wiki/IND_Fulton_Street_Line" } ] }, "geometryRef": "nyc-IND Fulton Street Line", "id": "nyc-ind-fulton-street-line-19481128-3", "kind": "extension", "label": { "en": "Extension: Broadway Junction → Euclid Avenue (Pennsylvania/Pitkin Avenues)" }, "notes": "Added four stations: Liberty Avenue, Van Siclen Avenue, Shepherd Avenue, and Euclid Avenue. (Grant Avenue, though sometimes grouped with this segment, did not open until 1956 — see next phase.) The $46.5M figure is described as approximate ('about'), so flagged as an estimate. [Opening-date chase 2026-06-13] Stations opened to the public early morning Nov 28, 1948 after all-night test ('dry') runs — the 'dry runs' headline confirms Nov 28 as the public revenue-service date, not a test-only opening.", "opened": "1948-11-28", "segment": { "fromStopIndex": 11, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124552/https://en.wikipedia.org/wiki/IND_Fulton_Street_Line", "kind": "wikipedia", "quote": "The extension of the Fulton Street Line...was placed in operation on November 28, 1948, running along Pennsylvania Avenue and Pitkin Avenue to Euclid Avenue...The cost of the extension was about $46.5 million.", "tier": "tertiary", "title": "IND Fulton Street Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Fulton_Street_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260412171755/https://www.newspapers.com/image/52882609/?terms=euclid%2Bpitkin%2Bsubway", "kind": "news", "publisher": "Brooklyn Daily Eagle", "quote": "[November 29, 1948 — day-after report on the November 28, 1948 opening of the extension to Euclid Avenue]", "tier": "secondary", "title": "Trains Roll on $47,000,000 Fulton St. Subway Extension", "url": "https://www.newspapers.com/image/52882609/?terms=euclid%2Bpitkin%2Bsubway", "via": "https://en.wikipedia.org/wiki/IND_Fulton_Street_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260517010114/https://www.newspapers.com/image/52881207/?terms=euclid%2Bpitkin%2Bsubway", "kind": "news", "publisher": "Brooklyn Daily Eagle", "quote": "Fulton Subway Stations Open After All-Night 'Dry Runs' [dated November 28, 1948 — same-day reporting on the opening; title confirms stations opened to public on November 28 after overnight test runs]", "tier": "secondary", "title": "Fulton Subway Stations Open After All-Night 'Dry Runs'", "url": "https://www.newspapers.com/image/52881207/?terms=euclid%2Bpitkin%2Bsubway", "via": "https://en.wikipedia.org/wiki/IND_Fulton_Street_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613163210/https://timesmachine.nytimes.com/timesmachine/1948/11/29/118517850.html?pdf_redirect=true&site=false", "kind": "news", "publisher": "The New York Times", "quote": "[November 29, 1948 — reports on the prior day's opening of 4 stations including Euclid Avenue on November 28, 1948]", "tier": "secondary", "title": "4 Stations Opened By IND in Brooklyn: Mayor and Officials Inspect Fulton St. Line Extension to New Euclid Ave. Stop", "url": "https://timesmachine.nytimes.com/timesmachine/1948/11/29/118517850.pdf", "via": "https://en.wikipedia.org/wiki/Euclid_Avenue_station_(IND_Fulton_Street_Line)" } ], "stationCount": 4 }, { "confidence": "medium", "cost": { "basis": "outturn", "confidence": "low", "nominal": { "currency": "USD", "isEstimate": false, "value": 10154702, "year": 1956 }, "notes": "Figure from the NY Times article headline 'First Leg of Rockaways Transit Opened at Cost of $10,154,702' (30 April 1956); covers the Grant Avenue station and the ramp/connection to the former BMT Fulton Street elevated. [Citation chase 2026-06-11] The $10,154,702 figure is traceable only to the title string of Wikipedia's NYT citation; it does not appear in the Wikipedia article prose, and the underlying NYT timesmachine PDF (30 Apr 1956) returns HTTP 403 (paywall) with no Wayback snapshot, so the cost cannot be independently verified from the primary source.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124552/https://en.wikipedia.org/wiki/IND_Fulton_Street_Line", "kind": "wikipedia", "quote": "First Leg of Rockaways Transit Opened at Cost of $10,154,702", "tier": "secondary", "title": "IND Fulton Street Line — Wikipedia (cites NYT 30 Apr 1956)", "url": "https://en.wikipedia.org/wiki/IND_Fulton_Street_Line" } ] }, "geometryRef": null, "id": "nyc-ind-fulton-street-line-19560429-4", "kind": "extension", "label": { "en": "Extension: Euclid Avenue → Grant Avenue + connection to BMT Fulton elevated (through service to Lefferts Boulevard)" }, "notes": "Grant Avenue opened 29 April 1956 as the sole new subway station. A ramp at Grant Avenue connected the IND subway to the former BMT Fulton Street elevated, enabling through A-train service to Ozone Park–Lefferts Boulevard (those Queens elevated stations had opened 25 September 1915 and were not newly built). Service to Lefferts Boulevard began roughly 2 May 1956, a few days after Grant Avenue opened. The $10,154,702 cost is from the contemporaneous NY Times report cited by Wikipedia. [Opening-date chase 2026-06-13] The BMT Fulton elevated connection was made by severing the old elevated link (Apr 26, 1956) and opening a ramp from the new underground Grant Avenue station to the elevated structure; through service to Lefferts Blvd began Apr 29, 1956.", "opened": "1956-04-29", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124552/https://en.wikipedia.org/wiki/IND_Fulton_Street_Line", "kind": "wikipedia", "quote": "First Leg of Rockaways Transit Opened at Cost of $10,154,702", "tier": "secondary", "title": "IND Fulton Street Line — Wikipedia (cites NYT 30 Apr 1956)", "url": "https://en.wikipedia.org/wiki/IND_Fulton_Street_Line" }, { "accessedAt": "2026-06-13", "kind": "news", "publisher": "The New York Times", "quote": "[April 30, 1956 — day-after reporting on the April 29, 1956 opening of Grant Avenue station and service to Lefferts Boulevard; headline confirms the opening occurred]", "tier": "secondary", "title": "First Leg of Rockaways Transit Opened at Cost of $10,154,702", "url": "https://timesmachine.nytimes.com/timesmachine/1956/04/30/94293042.pdf", "via": "https://en.wikipedia.org/wiki/IND_Fulton_Street_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613163115/https://timesmachine.nytimes.com/timesmachine/1956/06/28/84703811.pdf", "kind": "news", "publisher": "The New York Times", "quote": "[June 28, 1956 — reports on the IND Rockaway Line opening; provides corroborating context for the April 29, 1956 Grant Avenue/Lefferts Blvd opening as the prior 'first leg']", "tier": "secondary", "title": "Rockaway Trains to Operate Today", "url": "https://timesmachine.nytimes.com/timesmachine/1956/06/28/84703811.pdf", "via": "https://en.wikipedia.org/wiki/IND_Fulton_Street_Line" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124552/https://en.wikipedia.org/wiki/IND_Fulton_Street_Line", "kind": "wikipedia", "quote": "The line was opened from Jay Street to Rockaway Avenue on April 9, 1936, including the stub terminal at Court Street.", "tier": "tertiary", "title": "IND Fulton Street Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Fulton_Street_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124617/https://en.wikipedia.org/wiki/New_York_Transit_Museum", "kind": "wikipedia", "quote": "On July 4, 1976, the New York City Transit Exhibit was opened in the decommissioned underground station as part of the United States Bicentennial celebration.", "tier": "tertiary", "title": "New York Transit Museum — Wikipedia", "url": "https://en.wikipedia.org/wiki/New_York_Transit_Museum" } ] }, { "cityId": "nyc", "color": "#FF6319", "displayNumber": "IND Culver Line", "id": "nyc-line-ind-culver-line", "name": { "en": "IND Culver Line" }, "phases": [ { "confidence": "high", "geometryRef": null, "id": "nyc-ind-culver-line-19330320-0", "kind": "initial", "label": { "en": "Stage 1 opens: Jay Street → Bergen Street (initial IND subway segment, Eighth Avenue 'A' express trains)" }, "notes": "[Opening-date chase 2026-06-13] Public revenue opening (not ceremonial): first express train for Manhattan left Bergen Street at 6:25 A.M. on March 20, 1933.", "opened": "1933-03-20", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260601233721/https://en.wikipedia.org/wiki/IND_Culver_Line", "kind": "wikipedia", "quote": "The first short section of the line opened on March 20, 1933, taking Eighth Avenue Express A trains (and for about a month from July to August C trains) south from Jay Street to Bergen Street.", "tier": "tertiary", "title": "IND Culver Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Culver_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260601185905/https://en.wikipedia.org/wiki/Bergen_Street_station_(IND_Culver_Line)", "kind": "wikipedia", "quote": "Bergen Street opened on March 20, 1933, as the first station of the IND Culver Line.", "tier": "tertiary", "title": "Bergen Street station (IND Culver Line) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bergen_Street_station_(IND_Culver_Line)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250601235006/https://www.nytimes.com/1933/03/21/archives/city-subway-adds-link-extension-to-bergensmith-street-station-in.html", "kind": "news", "publisher": "The New York Times", "quote": "Extension to Bergen-Smith Street Station in Brooklyn Opened. [title; article dated March 21, 1933 — day-after report of March 20 revenue opening]", "tier": "secondary", "title": "City Subway Adds Link; Extension to Bergen-Smith Street Station in Brooklyn Opened.", "url": "https://www.nytimes.com/1933/03/21/archives/city-subway-adds-link-extension-to-bergensmith-street-station-in.html", "via": "https://en.wikipedia.org/wiki/IND_Culver_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260511232442/https://bklyn.newspapers.com/image/59887096/?terms=%22bergen%22%2B%22independent%2Bsubway%22", "kind": "news", "publisher": "Brooklyn Daily Eagle", "quote": "City's Subway Open March 20 To Bergen St. [headline, advance notice article dated March 12, 1933, page 8]", "tier": "secondary", "title": "City's Subway Open March 20 To Bergen St.", "url": "https://bklyn.newspapers.com/image/59887096/?terms=%22bergen%22%2B%22independent%2Bsubway%22", "via": "https://en.wikipedia.org/wiki/IND_Culver_Line" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "nyc-IND Culver Line", "id": "nyc-ind-culver-line-19331007-1", "kind": "extension", "label": { "en": "Stage 2 opens: Bergen Street → Church Avenue (extension to 'temporary' Church Avenue terminal)" }, "opened": "1933-10-07", "segment": { "fromStopIndex": 0, "toStopIndex": 8 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260601233721/https://en.wikipedia.org/wiki/IND_Culver_Line", "kind": "wikipedia", "quote": "The rest of the line opened on October 7, 1933, to the 'temporary' terminal at Church Avenue, three blocks away from the Culver elevated at Ditmas Avenue.", "tier": "tertiary", "title": "IND Culver Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Culver_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124712/https://en.wikipedia.org/wiki/Church_Avenue_station_(IND_Culver_Line)", "kind": "wikipedia", "quote": "The Church Avenue station opened on October 7, 1933, as the new terminal of the Culver Line.", "tier": "tertiary", "title": "Church Avenue station (IND Culver Line) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Church_Avenue_station_(IND_Culver_Line)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250528053051/https://www.nytimes.com/1933/10/07/archives/6000000-saving-planned-for-irt-drastic-economies-described-by.html", "kind": "news", "publisher": "The New York Times", "quote": "City Subway Extended [title of item dated October 7, 1933, page 16 — same-day (likely evening edition) report confirming October 7 revenue opening]", "tier": "secondary", "title": "City Subway Extended", "url": "https://www.nytimes.com/1933/10/07/archives/6000000-saving-planned-for-irt-drastic-economies-described-by.html", "via": "https://en.wikipedia.org/wiki/IND_Culver_Line" } ], "stationCount": 6 }, { "confidence": "medium", "geometryRef": null, "id": "nyc-ind-culver-line-19370701-2", "kind": "extension", "label": { "en": "IND Crosstown Line connection opens at Bergen Street (GG trains extended to Smith–Ninth Streets)" }, "opened": "1937-07-01", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260601233721/https://en.wikipedia.org/wiki/IND_Culver_Line", "kind": "wikipedia", "quote": "On July 1, 1937, the connection to the IND Crosstown Line opened and GG trains were extended to Smith-Ninth Streets.", "tier": "tertiary", "title": "IND Culver Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Culver_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260508023638/https://bklyn.newspapers.com/image/52688792/?terms=crosstown%2Bsubway", "kind": "news", "publisher": "Brooklyn Daily Eagle", "quote": "New Crosstown Subway Line Is Opened [headline, Brooklyn Daily Eagle, July 1, 1937 — same-day report of revenue service inauguration]", "tier": "secondary", "title": "New Crosstown Subway Line Is Opened", "url": "https://bklyn.newspapers.com/image/52688792/?terms=crosstown%2Bsubway", "via": "https://en.wikipedia.org/wiki/IND_Culver_Line" } ], "stationCount": 0 }, { "confidence": "high", "constructionStart": "1941", "cost": { "basis": "estimate", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": true, "value": 11000000, "year": 1954 }, "notes": "Estimated total project cost was 'over $11 million' — this covered not just the ramp (itself expected to cost ~$2 million) but new signals, rehabilitation of the Culver elevated, and lengthening of its stations to IND standards; not the ramp alone. Construction began June 1941, was halted that year due to WWII, and restarted in 1946 with material/rolling-stock delays. [Citation chase 2026-06-11] The \"over $11 million\" figure is a January 1941 contemporary estimate (Brooklyn Daily Eagle), so it is in ~1941 dollars rather than 1954 dollars; the three primary citations backing it (two paywalled newspapers.com scans and an offline Sparberg 2014 book page) could not be independently verified, so the figure currently rests on Wikipedia's restatement alone.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260601233721/https://en.wikipedia.org/wiki/IND_Culver_Line", "kind": "wikipedia", "quote": "On October 30, 1954, the connection between the IND Brooklyn Line at Church Avenue and the BMT Culver Line at Ditmas Avenue opened.", "tier": "tertiary", "title": "IND Culver Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Culver_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124712/https://en.wikipedia.org/wiki/Church_Avenue_station_(IND_Culver_Line)", "kind": "wikipedia", "quote": "The ramp was expected to cost $2 million, and along with new signals, and rehabilitation of the Culver elevated and lengthening of its stations to IND standards, the total cost of the project was estimated at over $11 million.", "tier": "tertiary", "title": "Church Avenue station (IND Culver Line) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Church_Avenue_station_(IND_Culver_Line)" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260601233721/https://en.wikipedia.org/wiki/IND_Culver_Line", "kind": "wikipedia", "quote": "Construction began in June 1941, and was expected to be completed by the end of the year. ... was halted later that year because of America's entrance into World War II. When the project was restarted in 1946, completion was delayed further due to continued material shortages.", "tier": "tertiary", "title": "IND Culver Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Culver_Line" } ] }, "geometryRef": "nyc-IND Culver Line", "id": "nyc-ind-culver-line-19541030-3", "kind": "extension", "label": { "en": "Culver Ramp connection opens: Church Avenue (IND) → Ditmas Avenue (BMT Culver el), IND trains reach Coney Island–Stillwell Avenue" }, "notes": "[Date chase 2026-06-12] Primary source for the June 1941 construction start is Brooklyn Daily Eagle, 'Vogel Lauds City for Speed In Starting Culver L Link', June 10, 1941 (newspapers.com, paywalled; archived copy also inaccessible). Ramp was halted by WWII later in 1941, restarted 1946, opened October 30, 1954. [Opening-date chase 2026-06-13] Culver Ramp opening on October 30, 1954 was both a ceremonial event (officials Klein and Guinan spoke; a NYCTA ceremony pass survives) and the revenue-service start on the same day.", "opened": "1954-10-30", "segment": { "fromStopIndex": 8, "toStopIndex": 19 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260601233721/https://en.wikipedia.org/wiki/IND_Culver_Line", "kind": "wikipedia", "quote": "On October 30, 1954, the connection between the IND Brooklyn Line at Church Avenue and the BMT Culver Line at Ditmas Avenue opened.", "tier": "tertiary", "title": "IND Culver Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Culver_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124712/https://en.wikipedia.org/wiki/Church_Avenue_station_(IND_Culver_Line)", "kind": "wikipedia", "quote": "The ramp was expected to cost $2 million, and along with new signals, and rehabilitation of the Culver elevated and lengthening of its stations to IND standards, the total cost of the project was estimated at over $11 million.", "tier": "tertiary", "title": "Church Avenue station (IND Culver Line) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Church_Avenue_station_(IND_Culver_Line)" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260601233721/https://en.wikipedia.org/wiki/IND_Culver_Line", "kind": "wikipedia", "quote": "Construction began in June 1941, and was expected to be completed by the end of the year. ... was halted later that year because of America's entrance into World War II. When the project was restarted in 1946, completion was delayed further due to continued material shortages.", "tier": "tertiary", "title": "IND Culver Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Culver_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260508004006/https://www.newspapers.com/image/53520778/?terms=culver%2Bramp%2Bsubway", "kind": "news", "publisher": "Brooklyn Daily Eagle", "quote": "Construction began in June 1941 [per Wikipedia's direct quotation of this source]", "tier": "primary", "title": "Vogel Lauds City for Speed In Starting Culver 'L' Link", "url": "https://www.newspapers.com/image/53520778/?terms=culver%2Bramp%2Bsubway", "via": "https://en.wikipedia.org/wiki/IND_Culver_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20241127222706/https://www.nytimes.com/1954/10/31/archives/bronxconey-line-is-opened-by-ind-crews-rush-work-to-finish-in-rain.html", "kind": "news", "publisher": "The New York Times", "quote": "Bronx-Coney Line is Opened by IND; Crews Rush Work to Finish in Rain – Klein and Guinan Speak at Ceremony [NYT October 31, 1954, page 72 — next-day report of the October 30 revenue/ceremony opening]", "tier": "secondary", "title": "Bronx-Coney Line is Opened by IND; Crews Rush Work to Finish in Rain – Klein and Guinan Speak at Ceremony", "url": "https://www.nytimes.com/1954/10/31/archives/bronxconey-line-is-opened-by-ind-crews-rush-work-to-finish-in-rain.html", "via": "https://en.wikipedia.org/wiki/IND_Culver_Line" }, { "accessedAt": "2026-06-13", "kind": "news", "publisher": "The New York Times", "quote": "Adequate Transit Promised For City [NYT October 29, 1954, page 25 — advance article; cited in Wikipedia as supporting the October 30 opening; does not itself confirm the exact opening date]", "tier": "secondary", "title": "Adequate Transit Promised For City", "url": "https://www.nytimes.com/1954/10/29/archives/adequate-transit-promised-for-city-authority-head-writes-mayor-and.html", "via": "https://en.wikipedia.org/wiki/IND_Culver_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613163514/https://www.flickr.com/photos/127872292@N06/16964213100", "kind": "primary", "publisher": "Flickr (Union Turnpike user; item is a 1954 NYCTA pass)", "quote": "NYCTA Pass for Culver Line Ceremonies – 1954 [image of a 1954 ceremony pass; confirms a 1954 ceremony opening event but does not show the exact date]", "tier": "primary", "title": "Culver Line Ceremonies", "url": "https://www.flickr.com/photos/127872292@N06/16964213100", "via": "https://en.wikipedia.org/wiki/IND_Culver_Line" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260601233721/https://en.wikipedia.org/wiki/IND_Culver_Line", "kind": "wikipedia", "quote": "The first short section of the line opened on March 20, 1933, taking Eighth Avenue Express A trains (and for about a month from July to August C trains) south from Jay Street to Bergen Street.", "tier": "tertiary", "title": "IND Culver Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/IND_Culver_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611124712/https://en.wikipedia.org/wiki/Church_Avenue_station_(IND_Culver_Line)", "kind": "wikipedia", "quote": "The Church Avenue station opened on October 7, 1933, as the new terminal of the Culver Line.", "tier": "tertiary", "title": "Church Avenue station (IND Culver Line) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Church_Avenue_station_(IND_Culver_Line)" } ] }, { "cityId": "nyc", "color": "#FCCC0A", "displayNumber": "BMT Broadway Line", "id": "nyc-line-bmt-broadway-line", "name": { "en": "BMT Broadway Line" }, "phases": [ { "confidence": "high", "constructionStart": "1912", "geometryRef": "nyc-BMT Broadway Line", "id": "nyc-bmt-broadway-line-19170904-0", "kind": "initial", "label": { "en": "Initial section opens: Canal Street → 14th Street–Union Square (Manhattan Bridge approach to Union Square)" }, "notes": "Opened at 2 P.M. with a PSC inspection train; public service began at 8 P.M. with trains leaving Union Square and Coney Island simultaneously. Segment ran from the north side of the Manhattan Bridge through Canal Street (express station) to 14th Street–Union Square. Construction was let in sections from 1912 (sections 1/1A in Lower Manhattan, section 2 Park Place–Walker, section 2A Walker–Howard, section 3 Howard–Houston, section 4 Houston–Union Square). Section contracts ranged roughly $0.9M–$3.7M each but no aggregate cost for this opening segment is stated, so cost omitted. [Date chase 2026-06-12] Earliest construction contract for the line (Route No. 5, Section 3, Howard St to Bleecker/Houston St, Underpinning & Foundation Co.) was executed January 19, 1912; the January 13, 1912 NYT article reports the contract award. Confirms 1912 construction start. [Opening-date chase 2026-06-13] September 4, 1917: ceremonial 8-car VIP train left Union Square at 2 PM; public revenue service opened at 8 PM the same day. Corroborated by Brooklyn Daily Eagle (Sep 4) and NYT (Sep 5).", "opened": "1917-09-04", "segment": { "fromStopIndex": 6, "toStopIndex": 9 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260522002812/https://en.wikipedia.org/wiki/BMT_Broadway_Line", "kind": "wikipedia", "quote": "A short portion of the line, coming off the north side of the Manhattan Bridge through Canal Street to 14th Street–Union Square, opened on September 4, 1917, at 2 P.M.", "tier": "tertiary", "title": "BMT Broadway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Broadway_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260322165009/https://www.nycsubway.org/wiki/BMT_Broadway_Line", "kind": "other", "quote": "A short portion of the line...opened on September 4, 1917, at 2 P.M., with an eight car train carrying members of the Public Service Commission.", "tier": "secondary", "title": "BMT Broadway Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/BMT_Broadway_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20250223050601/https://www.nytimes.com/1912/07/28/archives/new-subway-work-now-going-a-year-about-fourfifths-of-the.html", "kind": "news", "publisher": "The New York Times", "quote": "New Subway Work Now Going a Year; About Four-fifths of the Broadway-Lexington Avenue Line Is Under Construction. [Title, dated July 28, 1912 — implies construction was ongoing by mid-1912, consistent with January 1912 contract start]", "tier": "secondary", "title": "New Subway Work Now Going a Year; About Four-fifths of the Broadway-Lexington Avenue Line Is Under Construction", "url": "https://www.nytimes.com/1912/07/28/archives/new-subway-work-now-going-a-year-about-fourfifths-of-the.html", "via": "https://en.wikipedia.org/wiki/BMT_Broadway_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20250223120443/https://www.nytimes.com/1912/01/13/archives/broadway-subway-contract-awarded-section-3-goes-to-underpinning.html", "kind": "news", "publisher": "The New York Times", "quote": "Broadway Subway Contract Awarded; Section 3 Goes to Underpinning & Foundation Co. If Board of Estimate Approves [January 13, 1912 — first construction contract for the line]", "tier": "secondary", "title": "Broadway Subway Contract Awarded; Section 3 Goes to Underpinning & Foundation Co. If Board of Estimate Approves", "url": "https://www.nytimes.com/1912/01/13/archives/broadway-subway-contract-awarded-section-3-goes-to-underpinning.html", "via": "https://en.wikipedia.org/wiki/BMT_Broadway_Line" }, { "accessedAt": "2026-06-13", "kind": "news", "publisher": "The Brooklyn Daily Eagle", "quote": "Broadway Subway Opened To Coney By Special Train [dateline September 4, 1917]", "tier": "secondary", "title": "Broadway Subway Opened To Coney By Special Train. Brooklynites Try New Manhattan Link From Canal St. to Union Square. Go Via Fourth Ave. Tube", "url": "https://www.newspapers.com/clip/2708189/the_brooklyn_daily_eagle/", "via": "https://en.wikipedia.org/wiki/BMT_Broadway_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251006002918/https://www.nytimes.com/1917/09/05/archives/open-first-section-of-broadway-line-train-carrying-1000-passengers.html", "kind": "news", "publisher": "The New York Times", "quote": "Open First Section of Broadway Line; Train Carrying 1,000 Passengers Runs from Fourteenth Street to Coney Island. Regular Service Begins. [dated September 5, 1917, reporting on opening the prior day]", "tier": "secondary", "title": "Open First Section of Broadway Line; Train Carrying 1,000 Passengers Runs from Fourteenth Street to Coney Island", "url": "https://www.nytimes.com/1917/09/05/archives/open-first-section-of-broadway-line-train-carrying-1000-passengers.html", "via": "https://en.wikipedia.org/wiki/BMT_Broadway_Line" } ] }, { "confidence": "high", "geometryRef": "nyc-BMT Broadway Line", "id": "nyc-bmt-broadway-line-19180105-1", "kind": "extension", "label": { "en": "Extension north to Times Square–42nd Street and south to Rector Street" }, "notes": "Extended north from 14th Street–Union Square to Times Square–42nd Street (adding 23rd, 28th, 34th–Herald Square, Times Square–42nd) and south to Rector Street (adding Canal Street local, City Hall, Cortlandt Street, Rector Street). Express service began on the line. Per-station articles confirm Rector, City Hall, 23rd and 28th Streets opened this date. Station count not given as a single figure in the line article; new stations ~8 by segment enumeration but left unstated to avoid overcount of the line/local distinction. [Opening-date chase 2026-06-13] January 5, 1918 opening confirmed by both terminus station articles and the next-day NYT report; Rector Street opened to the public at noon.", "opened": "1918-01-05", "segment": { "fromStopIndex": 2, "toStopIndex": 12 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260522002812/https://en.wikipedia.org/wiki/BMT_Broadway_Line", "kind": "wikipedia", "quote": "On January 5, 1918, the line was extended north to Times Square–42nd Street and south to Rector Street.", "tier": "tertiary", "title": "BMT Broadway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Broadway_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260324000418/https://en.wikipedia.org/wiki/Rector_Street_station_(BMT_Broadway_Line)", "kind": "wikipedia", "quote": "Rector Street station opened to the public on January 5, 1918, at noon, serving as the southern terminus of the BMT Broadway Line extension", "tier": "tertiary", "title": "Rector Street station (BMT Broadway Line) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Rector_Street_station_(BMT_Broadway_Line)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20210831204326/https://timesmachine.nytimes.com/timesmachine/1918/01/06/102652686.pdf", "kind": "news", "publisher": "The New York Times", "quote": "Open New Subway To Times Square; Brooklyn Directly Connected with Wholesale and Shopping Districts of New York. Nickel Zone Is Extended. First Train in Broadway Tube Makes Run from Rector Street in 17 Minutes. [dated January 6, 1918, reporting on the January 5 opening]", "tier": "secondary", "title": "Open New Subway To Times Square; Brooklyn Directly Connected with Wholesale and Shopping Districts of New York", "url": "https://timesmachine.nytimes.com/timesmachine/1918/01/06/102652686.pdf", "via": "https://en.wikipedia.org/wiki/BMT_Broadway_Line" } ] }, { "confidence": "high", "geometryRef": "nyc-BMT Broadway Line", "id": "nyc-bmt-broadway-line-19180920-2", "kind": "extension", "label": { "en": "Extension south one station to Whitehall Street–South Ferry" }, "notes": "Service extended one station south from Rector Street to Whitehall Street–South Ferry. [Opening-date chase 2026-06-13] September 20, 1918 corroborated by the Whitehall Street station article and the NY State PSC 1918 annual report (primary source cited by Wikipedia).", "opened": "1918-09-20", "segment": { "fromStopIndex": 12, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260522002812/https://en.wikipedia.org/wiki/BMT_Broadway_Line", "kind": "wikipedia", "quote": "Service was extended one station to Whitehall Street–South Ferry on September 20, 1918.", "tier": "tertiary", "title": "BMT Broadway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Broadway_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251002004905/https://books.google.com/books?id=sXhCAQAAMAAJ", "kind": "primary", "publisher": "New York State Public Service Commission / J.B. Lyon Company", "quote": "[Cited by Wikipedia as primary source for September 20, 1918 opening date; full text not accessible via Google Books preview]", "tier": "primary", "title": "Report of the Public Service Commission for the First District of the State of New York [for year ending Dec 31, 1918]", "url": "https://books.google.com/books?id=sXhCAQAAMAAJ", "via": "https://en.wikipedia.org/wiki/BMT_Broadway_Line" } ], "stationCount": 1 }, { "confidence": "high", "geometryRef": "nyc-BMT Broadway Line", "id": "nyc-bmt-broadway-line-19190710-3", "kind": "extension", "label": { "en": "Extension north two stops to 57th Street–Seventh Avenue" }, "notes": "Extended two stops northward from Times Square–42nd Street to 57th Street (adding 49th Street and 57th Street). Express service between Times Square and Union Square also inaugurated this date. [Opening-date chase 2026-06-13] July 10, 1919: an earlier special officials' trip preceded the midnight first passenger run; express service Times Square–Union Square inaugurated same date.", "opened": "1919-07-10", "segment": { "fromStopIndex": 0, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260522002812/https://en.wikipedia.org/wiki/BMT_Broadway_Line", "kind": "wikipedia", "quote": "The line was extended two stops northward to 57th Street on July 10, 1919.", "tier": "tertiary", "title": "BMT Broadway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Broadway_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613163430/https://timesmachine.nytimes.com/timesmachine/1919/07/10/112642412.pdf", "kind": "news", "publisher": "The New York Times", "quote": "Broadway End of Subway Opened; First Passenger Train Sent at Midnight Over Route from Times Square to 57th St. Earlier Special Trip. Party of Officials and Citizen Delegations Taken Over New Tracks and to Coney Island. [dated July 10, 1919]", "tier": "secondary", "title": "Broadway End of Subway Opened; First Passenger Train Sent at Midnight Over Route from Times Square to 57th St.", "url": "https://timesmachine.nytimes.com/timesmachine/1919/07/10/112642412.pdf", "via": "https://en.wikipedia.org/wiki/BMT_Broadway_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251104011713/https://books.google.com/books?pg=PA130&id=AINOAQAAMAAJ", "kind": "primary", "publisher": "New York State Public Service Commission", "quote": "[Cited by Wikipedia as primary source for July 10, 1919 extension; full text not accessible via Google Books preview]", "tier": "primary", "title": "Report of the Public Service Commission For The First District Of The State of New York For The Year Ending December 31, 1919", "url": "https://books.google.com/books?id=AINOAQAAMAAJ&pg=PA130", "via": "https://en.wikipedia.org/wiki/BMT_Broadway_Line" } ], "stationCount": 2 }, { "confidence": "high", "geometryRef": null, "id": "nyc-bmt-broadway-line-19190901-4", "kind": "extension", "label": { "en": "Extension to Lexington Avenue/59th Street" }, "notes": "Extended from 57th Street to Lexington Avenue/59th Street (on the 60th Street Tunnel approach). [Opening-date chase 2026-06-13] September 1, 1919 confirmed by the NYT Aug 31 preview ('...Tomorrow'), the Lexington Av/59th St station article, and the PSC 1920 annual report.", "opened": "1919-09-01", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260522002812/https://en.wikipedia.org/wiki/BMT_Broadway_Line", "kind": "wikipedia", "quote": "The line was extended to Lexington Avenue/59th Street on September 1, 1919.", "tier": "tertiary", "title": "BMT Broadway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Broadway_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250904195955/https://www.nytimes.com/1919/08/31/archives/subway-to-open-two-new-stations-broadway-line-of-brt-will-extend-to.html", "kind": "news", "publisher": "The New York Times", "quote": "Subway To Open Two New Stations; Broadway Line of B.R.T. Will Extend to Lexington Av. and 60th St. Tomorrow. An Entrance at Fifth Av. Central Manhattan to Have Direct Service to All Brooklyn and Coney Island. [dated August 31, 1919, confirming the September 1, 1919 opening]", "tier": "secondary", "title": "Subway To Open Two New Stations; Broadway Line of B.R.T. Will Extend to Lexington Av. and 60th St. Tomorrow", "url": "https://www.nytimes.com/1919/08/31/archives/subway-to-open-two-new-stations-broadway-line-of-brt-will-extend-to.html", "via": "https://en.wikipedia.org/wiki/BMT_Broadway_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251104011713/https://books.google.com/books?pg=PA130&id=AINOAQAAMAAJ", "kind": "primary", "publisher": "New York State Public Service Commission", "quote": "[Cited by Wikipedia as primary source for September 1, 1919 extension; full text not accessible via Google Books preview]", "tier": "primary", "title": "Report of the Public Service Commission For The First District Of The State of New York For The Year Ending December 31, 1919", "url": "https://books.google.com/books?id=AINOAQAAMAAJ&pg=PA130", "via": "https://en.wikipedia.org/wiki/BMT_Broadway_Line" } ], "stationCount": 1 }, { "confidence": "high", "geometryRef": null, "id": "nyc-bmt-broadway-line-19200801-5", "kind": "extension", "label": { "en": "Both ends extended via East River tunnels: 60th Street Tunnel to Queensboro Plaza (north) and Montague Street Tunnel to DeKalb Avenue (south)" }, "notes": "Two East River tunnels opened simultaneously: northward through the 60th Street Tunnel to Queensboro Plaza (Queens), and southward through the Montague Street Tunnel to DeKalb Avenue (Brooklyn), with service continuing via the BMT Brighton Line. This completed the through Broadway Line trunk. Station count not stated as a single figure; the new through-running stations are Queensboro Plaza and the Court Street/DeKalb connection, but precise new-station count left unstated to avoid double-counting shared/transfer stations. [Opening-date chase 2026-06-13] August 1, 1920: revenue service began ~2 AM on a holiday schedule via both the 60th Street and Montague Street tunnels; regular weekday service began the next day (Aug 2). Curated revenue-service date is correct.", "opened": "1920-08-01", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260522002812/https://en.wikipedia.org/wiki/BMT_Broadway_Line", "kind": "wikipedia", "quote": "On August 1, 1920, the Broadway Line was extended on either end, with the opening of two tunnels under the East River. On the north end the line was extended through the 60th Street Tunnel to Queensboro Plaza, and on the south end the line was extended through the Montague Street Tunnel to DeKalb Avenue.", "tier": "tertiary", "title": "BMT Broadway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Broadway_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260322165009/https://www.nycsubway.org/wiki/BMT_Broadway_Line", "kind": "other", "quote": "On August 1, 1920, the Broadway Line was extended on either end, with the opening of two tunnels under the East River.", "tier": "secondary", "title": "BMT Broadway Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/BMT_Broadway_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20230112185712/https://timesmachine.nytimes.com/timesmachine/1920/08/02/102879419.pdf", "kind": "news", "publisher": "The New York Times", "quote": "New B.R.T. Lines Open.; Broadway-Brighton Trains, on Holiday Schedule, Have Light Traffic. [dated August 2, 1920, reporting on August 1 opening]", "tier": "secondary", "title": "New B.R.T. Lines Open.; Broadway-Brighton Trains, on Holiday Schedule, Have Light Traffic", "url": "https://timesmachine.nytimes.com/timesmachine/1920/08/02/102879419.pdf", "via": "https://en.wikipedia.org/wiki/BMT_Broadway_Line" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260522002812/https://en.wikipedia.org/wiki/BMT_Broadway_Line", "kind": "wikipedia", "quote": "A short portion of the line, coming off the north side of the Manhattan Bridge through Canal Street to 14th Street–Union Square, opened on September 4, 1917, at 2 P.M.", "tier": "tertiary", "title": "BMT Broadway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Broadway_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260322165009/https://www.nycsubway.org/wiki/BMT_Broadway_Line", "kind": "other", "quote": "A short portion of the line...opened on September 4, 1917, at 2 P.M., with an eight car train carrying members of the Public Service Commission.", "tier": "secondary", "title": "BMT Broadway Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/BMT_Broadway_Line" } ] }, { "cityId": "nyc", "color": "#FCCC0A", "displayNumber": "BMT Astoria Line", "id": "nyc-line-bmt-astoria-line", "name": { "en": "BMT Astoria Line" }, "phases": [ { "confidence": "medium", "constructionStart": "1915", "cost": { "basis": "budget", "confidence": "low", "nominal": { "currency": "USD", "isEstimate": false, "value": 884859, "year": 1916 }, "notes": "This figure ($884,859, Snare & Triest Construction Co.) is for the Queensboro Plaza interchange station ONLY, which is SHARED with the IRT Flushing Line — not the cost of the whole Astoria elevated line. No separate full-line construction cost was found in the consulted sources. [Citation chase 2026-06-11] The $884,859 figure is the Snare & Triest contract award price (New-York Tribune, Sept 5, 1915) — a contracted/budget amount, not a verified final outturn — resting on a single paywalled newspaper source (ProQuest 575492081) relayed via the Queensboro Plaza Wikipedia article, with no independent corroboration. The underlying cost year is 1915 (contract award), not 1916.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260508004005/https://en.wikipedia.org/wiki/BMT_Astoria_Line", "kind": "wikipedia", "quote": "The whole line north of Queensboro Plaza opened on February 1, 1917 and was used by trains between Grand Central and Astoria.", "tier": "tertiary", "title": "BMT Astoria Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Astoria_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604083659/https://en.wikipedia.org/wiki/Astoria%E2%80%93Ditmars_Boulevard_station", "kind": "wikipedia", "quote": "This station opened on February 1, 1917, along with the rest of the Astoria Line.", "tier": "tertiary", "title": "Astoria–Ditmars Boulevard station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Astoria%E2%80%93Ditmars_Boulevard_station" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260601184120/https://en.wikipedia.org/wiki/Queensboro_Plaza_station", "kind": "wikipedia", "quote": "The northern half of the station opened on February 1, 1917 ... The Snare & Triest Construction Company ... construction costs totaling $884,859.", "tier": "tertiary", "title": "Queensboro Plaza station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Queensboro_Plaza_station" } ] }, "geometryRef": "nyc-BMT Astoria Line", "id": "nyc-bmt-astoria-line-19170201-0", "kind": "initial", "label": { "en": "Line opens: Queensboro Plaza → Astoria (Ditmars) – entire Astoria elevated, joint IRT/BRT operation" }, "notes": "Construction-start corrected 1916→1915 [Date chase 2026-06-12 — panel-confirmed, corrected w/ sign-off] [Date chase 2026-06-12] constructionStart '1916' unsupported by all phase sources (opening-only) and contradicted by external evidence: Queensboro Plaza station was ~75% complete by Sep 5, 1915 (New-York Tribune, paywalled, cited via Queensboro Plaza Wikipedia), so construction began no later than 1915 and likely 1913-1914 following the Dual Contracts (signed Mar 19, 1913). Proposed year 1915 is the conservative, directly-evidenced floor; true start is probably 1913-1914. [Opening-date chase 2026-06-13] Feb 1, 1917 is a revenue/public-service opening per the Brooklyn Daily Eagle primary source; uncited nycsubway.org station-level dates conflict but are unsourced and likely a database error confusing Phase 1 with Phase 2.", "opened": "1917-02-01", "segment": { "fromStopIndex": 0, "toStopIndex": 9 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260508004005/https://en.wikipedia.org/wiki/BMT_Astoria_Line", "kind": "wikipedia", "quote": "The whole line north of Queensboro Plaza opened on February 1, 1917 and was used by trains between Grand Central and Astoria.", "tier": "tertiary", "title": "BMT Astoria Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Astoria_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604083659/https://en.wikipedia.org/wiki/Astoria%E2%80%93Ditmars_Boulevard_station", "kind": "wikipedia", "quote": "This station opened on February 1, 1917, along with the rest of the Astoria Line.", "tier": "tertiary", "title": "Astoria–Ditmars Boulevard station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Astoria%E2%80%93Ditmars_Boulevard_station" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260601184120/https://en.wikipedia.org/wiki/Queensboro_Plaza_station", "kind": "wikipedia", "quote": "The northern half of the station opened on February 1, 1917 ... The Snare & Triest Construction Company ... construction costs totaling $884,859.", "tier": "tertiary", "title": "Queensboro Plaza station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Queensboro_Plaza_station" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260305193006/https://bklyn.newspapers.com/image/54438288/", "kind": "news", "publisher": "Brooklyn Daily Eagle", "quote": "First Train Runs On Elevated Line to Astoria Section [headline, dated February 1, 1917]", "tier": "secondary", "title": "First Train Runs On Elevated Line to Astoria Section", "url": "https://bklyn.newspapers.com/image/54438288/", "via": "https://en.wikipedia.org/wiki/BMT_Astoria_Line" } ], "stationCount": 7 }, { "confidence": "medium", "geometryRef": null, "id": "nyc-bmt-astoria-line-19170421-1", "kind": "extension", "label": { "en": "Through IRT service to the Corona (Flushing) Line begins from Queensboro Plaza" }, "notes": "[Opening-date chase 2026-06-13] This is a through-service extension event (IRT service to the Corona/Flushing Line), not a new physical-infrastructure opening; NYT headline confirms it was 'Opened to the Public.'", "opened": "1917-04-21", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260508004005/https://en.wikipedia.org/wiki/BMT_Astoria_Line", "kind": "wikipedia", "quote": "Through IRT service to the Corona Line (now the Flushing Line) began two months later on April 21.", "tier": "tertiary", "title": "BMT Astoria Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Astoria_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20231223113022/https://timesmachine.nytimes.com/timesmachine/1917/04/22/102336714.pdf", "kind": "news", "publisher": "The New York Times", "quote": "Transit Service on Corona Extension of Dual Subway System Opened to the Public [headline, April 22, 1917, reporting on April 21 opening]", "tier": "secondary", "title": "Transit Service on Corona Extension of Dual Subway System Opened to the Public", "url": "https://timesmachine.nytimes.com/timesmachine/1917/04/22/102336714.pdf", "via": "https://en.wikipedia.org/wiki/IRT_Flushing_Line" } ] }, { "confidence": "medium", "geometryRef": null, "id": "nyc-bmt-astoria-line-19200801-2", "kind": "extension", "label": { "en": "60th Street Tunnel opens, allowing BMT trains to reach Queensboro Plaza and the Astoria Line" }, "notes": "[Opening-date chase 2026-06-13] Revenue-service opening (2 a.m., holiday schedule) per NYT and the 60th Street Tunnel article.", "opened": "1920-08-01", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260508004005/https://en.wikipedia.org/wiki/BMT_Astoria_Line", "kind": "wikipedia", "quote": "The 60th Street Tunnel opened on August 1, 1920, allowing BMT trains to reach Queensboro Plaza.", "tier": "tertiary", "title": "BMT Astoria Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Astoria_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250904203746/https://www.nytimes.com/1920/08/01/archives/new-subway-link-opens-service-started-through-queens-and-montague.html", "kind": "news", "publisher": "The New York Times", "quote": "New Subway Link Opens [headline, August 1, 1920]", "tier": "secondary", "title": "New Subway Link Opens; Service Started Through Queens and Montague Street Tubes", "url": "https://www.nytimes.com/1920/08/01/archives/new-subway-link-opens-service-started-through-queens-and-montague.html", "via": "https://en.wikipedia.org/wiki/BMT_Astoria_Line" } ] }, { "confidence": "medium", "geometryRef": null, "id": "nyc-bmt-astoria-line-19230408-3", "kind": "extension", "label": { "en": "BMT begins elevated shuttle service over the Astoria Line (later numbered BMT 8 in 1924)" }, "notes": "[Opening-date chase 2026-06-13] Revenue-service start of BMT elevated shuttle (later numbered BMT 8 in 1924), not a test or ceremonial run.", "opened": "1923-04-08", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260508004005/https://en.wikipedia.org/wiki/BMT_Astoria_Line", "kind": "wikipedia", "quote": "On April 8, 1923, the BMT, using elevated cars, started running shuttles along the Astoria (numbered BMT 8 in 1924) and Corona Lines.", "tier": "tertiary", "title": "BMT Astoria Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Astoria_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250916150954/https://www.nytimes.com/1923/04/08/archives/hylan-tells-how-he-would-relieve-subways-in-60-days-start-and-quit.html", "kind": "news", "publisher": "The New York Times", "quote": "Additional Subway Service to Borough of Queens [headline, April 8, 1923]", "tier": "secondary", "title": "Additional Subway Service to Borough of Queens", "url": "https://www.nytimes.com/1923/04/08/archives/hylan-tells-how-he-would-relieve-subways-in-60-days-start-and-quit.html", "via": "https://en.wikipedia.org/wiki/BMT_Astoria_Line" } ] }, { "confidence": "medium", "geometryRef": null, "id": "nyc-bmt-astoria-line-19491017-4", "kind": "renumber", "label": { "en": "Joint operation ends; platforms shaved back so full-length BMT trains can run the Astoria Line (Flushing Line becomes IRT-only)" }, "notes": "[Opening-date chase 2026-06-13] NYT source is a pre-announcement (Oct 15) of the Oct 17 change; through service to Times Square had been discontinued earlier on July 24, 1949 (NY Daily News).", "opened": "1949-10-17", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260508004005/https://en.wikipedia.org/wiki/BMT_Astoria_Line", "kind": "wikipedia", "quote": "On October 17, 1949, the Flushing Line became IRT-only. The platforms on the Astoria Line were shaved back to allow through BMT trains to operate on it.", "tier": "tertiary", "title": "BMT Astoria Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Astoria_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613163502/https://timesmachine.nytimes.com/timesmachine/1949/10/15/96475230.html?pdf_redirect=true&site=false", "kind": "news", "publisher": "The New York Times", "quote": "Direct Subway Runs to Flushing, Astoria [headline, October 15, 1949 — published 2 days before the October 17 service change, announcing what was to occur]", "tier": "secondary", "title": "Direct Subway Runs to Flushing, Astoria", "url": "https://timesmachine.nytimes.com/timesmachine/1949/10/15/96475230.pdf", "via": "https://en.wikipedia.org/wiki/BMT_Astoria_Line" } ] }, { "confidence": "low", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": false, "value": 863000, "year": 1950 }, "notes": "Cost of the 1950 platform-lengthening project (610 ft / 190 m to accommodate ten-car 60-foot trains); not a line-construction cost. [Citation chase 2026-06-11] The $863,000 figure is currently verifiable only via Wikipedia; the two underlying 1950 primary sources (GCA Bulletin Vol. 41 p. 23; NYC Board of Transportation Proceedings Vol. 67) are accessible only as paywalled Google Books metadata and could not be independently confirmed. Note also the cost sentence has no dedicated inline ref in the article.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260508004005/https://en.wikipedia.org/wiki/BMT_Astoria_Line", "kind": "wikipedia", "quote": "The platforms at the seven stations on the Astoria Line were lengthened to 610 feet (190 m) to accommodate ten-car (60 foot) trains in 1950. The project cost $863,000.", "tier": "tertiary", "title": "BMT Astoria Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Astoria_Line" } ] }, "geometryRef": null, "id": "nyc-bmt-astoria-line-1950-5", "kind": "extension", "label": { "en": "Platform-lengthening modification: all seven Astoria Line station platforms extended to 610 ft for ten-car trains" }, "notes": "[Opening-date chase 2026-06-13] Year-only modification (platform lengthening to 610 ft for ten-car trains); Wikipedia cites two 1950 primary-era books that could not be directly accessed, so full verification remains partial.", "opened": "1950", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260508004005/https://en.wikipedia.org/wiki/BMT_Astoria_Line", "kind": "wikipedia", "quote": "The platforms at the seven stations on the Astoria Line were lengthened to 610 feet (190 m) to accommodate ten-car (60 foot) trains in 1950. The project cost $863,000.", "tier": "tertiary", "title": "BMT Astoria Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Astoria_Line" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260508004005/https://en.wikipedia.org/wiki/BMT_Astoria_Line", "kind": "wikipedia", "quote": "The whole line north of Queensboro Plaza opened on February 1, 1917 and was used by trains between Grand Central and Astoria.", "tier": "tertiary", "title": "BMT Astoria Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Astoria_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260604083659/https://en.wikipedia.org/wiki/Astoria%E2%80%93Ditmars_Boulevard_station", "kind": "wikipedia", "quote": "This station opened on February 1, 1917, along with the rest of the Astoria Line.", "tier": "tertiary", "title": "Astoria–Ditmars Boulevard station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Astoria%E2%80%93Ditmars_Boulevard_station" } ] }, { "cityId": "nyc", "color": "#FCCC0A", "displayNumber": "BMT Fourth Avenue Line", "id": "nyc-line-bmt-fourth-avenue-line", "name": { "en": "BMT Fourth Avenue Line" }, "phases": [ { "confidence": "medium", "constructionStart": "1909", "cost": { "basis": "outturn", "confidence": "low", "nominal": { "currency": "USD", "isEstimate": true, "value": 30000000, "year": 1915 }, "notes": "Wikipedia states 'about $30 million' for the initial portion of the line — an approximate figure, not a precise outturn. Covers the original DeKalb Avenue–59th Street trunk. [Citation chase 2026-06-11] The figure traces to a single Wikipedia statement whose sole citation is the NY State PSC pamphlet \"Fourth Avenue Subway, Brooklyn's New Transportation Line\" (published June 19, 1915, on the line's opening); that primary source is paywalled in Google Books preview and could not be verified verbatim, and no independent second source corroborates the $30M figure.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260609055255/https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line", "kind": "wikipedia", "quote": "the opening was delayed a day to June 22, 1915, when the line opened from the Manhattan Bridge through to the Sea Beach Line.", "tier": "tertiary", "title": "BMT Fourth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260609055255/https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line", "kind": "wikipedia", "quote": "Groundbreaking for the first section of the subway, between DeKalb Avenue and 43rd Street (ending at 36th Street), took place on November 13, 1909.", "tier": "tertiary", "title": "BMT Fourth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260609055255/https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line", "kind": "wikipedia", "quote": "Construction on the initial portion of the line cost about $30 million.", "tier": "tertiary", "title": "BMT Fourth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line" } ] }, "geometryRef": "nyc-BMT Fourth Avenue Line", "id": "nyc-bmt-fourth-avenue-line-19150622-0", "kind": "initial", "label": { "en": "Initial opening: Manhattan Bridge/DeKalb Avenue → 59th Street (via Sea Beach Line)" }, "notes": "Original 1915 stations opened on June 22 include DeKalb Avenue, Atlantic Avenue, Union Street, Ninth Street, Prospect Avenue, 25th Street, 36th Street, and 59th Street (8 stations). The 45th Street and 53rd Street stations, though physically complete, did not open with the rest because contractors were using them for hauling spoil; they opened separately on September 22, 1915 (captured as the next phase). [Date chase 2026-06-12] Underlying primary sources cited by Wikipedia (NYT 1909-11-14 'Fourth Ave. Subway Dirt Begins to Fly' via timesmachine, and Rogoff 1961 ERA bulletin via Google Drive) were inaccessible (paywall / dead link); year 1909 confirmed via the Wikipedia secondary-source text itself. [Opening-date chase 2026-06-13] Wikipedia distinguishes a June 15 test train and a June 19 ceremonial/official trip from the June 22 public revenue-service opening (delayed a day); the curated date is the revenue-service date.", "opened": "1915-06-22", "segment": { "fromStopIndex": 0, "toStopIndex": 12 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260609055255/https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line", "kind": "wikipedia", "quote": "the opening was delayed a day to June 22, 1915, when the line opened from the Manhattan Bridge through to the Sea Beach Line.", "tier": "tertiary", "title": "BMT Fourth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260609055255/https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line", "kind": "wikipedia", "quote": "Groundbreaking for the first section of the subway, between DeKalb Avenue and 43rd Street (ending at 36th Street), took place on November 13, 1909.", "tier": "tertiary", "title": "BMT Fourth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260609055255/https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line", "kind": "wikipedia", "quote": "Construction on the initial portion of the line cost about $30 million.", "tier": "tertiary", "title": "BMT Fourth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613162209/https://timesmachine.nytimes.com/timesmachine/1915/06/23/100163384.pdf", "kind": "news", "publisher": "The New York Times", "quote": "Referenced in Wikipedia as the source for the June 22, 1915 opening date (article published day after opening).", "tier": "secondary", "title": "Queensboro Tunnel Officially Opened (June 23, 1915) — The New York Times", "url": "https://timesmachine.nytimes.com/timesmachine/1915/06/23/100163384.pdf", "via": "https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20240703160701/https://timesmachine.nytimes.com/timesmachine/1915/06/20/104647917.pdf", "kind": "news", "publisher": "The New York Times", "quote": "Title confirms ceremonial opening June 19 ('Traffic Starts Tuesday' — i.e., June 22), corroborating the June 22 revenue-service date.", "tier": "secondary", "title": "New Subway Opens; Mayor Not Present (June 20, 1915) — The New York Times", "url": "https://timesmachine.nytimes.com/timesmachine/1915/06/20/104647917.pdf", "via": "https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line" } ], "stationCount": 8 }, { "confidence": "medium", "geometryRef": null, "id": "nyc-bmt-fourth-avenue-line-19150922-1", "kind": "extension", "label": { "en": "45th Street and 53rd Street stations open (delayed infill on original segment)" }, "notes": "These two stations were structurally part of the original 1915 line but opened three months later than the June 22 service date because the contractor used them to haul out construction spoil. Treated as a distinct staged opening. [Opening-date chase 2026-06-13] 45th and 53rd Street stations were physically complete at the June 22 opening but held closed (a contractor used them to haul dirt) until opening on September 22, 1915 — a distinct delayed-infill event, not a partial-segment ambiguity.", "opened": "1915-09-22", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260609055255/https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line", "kind": "wikipedia", "quote": "The stations opened on September 22, 1915.", "tier": "tertiary", "title": "BMT Fourth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251220004518/https://en.wikipedia.org/wiki/45th_Street_station_(BMT_Fourth_Avenue_Line)", "kind": "wikipedia", "quote": "The 45th and 53rd Street stations opened on September 22, 1915.", "tier": "tertiary", "title": "45th Street station (BMT Fourth Avenue Line) — Wikipedia", "url": "https://en.wikipedia.org/wiki/45th_Street_station_(BMT_Fourth_Avenue_Line)" }, { "accessedAt": "2026-06-13", "kind": "news", "publisher": "Home Talk the Item", "quote": "Stations of Subway are Now Opened [September 22, 1915 — day of opening]", "tier": "secondary", "title": "Stations of Subway are Now Opened — Home Talk the Item", "url": "https://www.newspapers.com/clip/49708570/", "via": "https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line" } ], "stationCount": 2 }, { "confidence": "high", "geometryRef": "nyc-BMT Fourth Avenue Line", "id": "nyc-bmt-fourth-avenue-line-19160115-2", "kind": "extension", "label": { "en": "Extension: 59th Street → 86th Street" }, "notes": "New stations added on this extension: Bay Ridge Avenue (69th St), 77th Street, and 86th Street (3 stations). [Opening-date chase 2026-06-13] Opening date is backed by a primary government record (NY State Senate Documents, 1917) plus a same-day Brooklyn Daily Eagle report.", "opened": "1916-01-15", "segment": { "fromStopIndex": 12, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260609055255/https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line", "kind": "wikipedia", "quote": "The line opened from 59th Street to 86th Street on January 15, 1916.", "tier": "tertiary", "title": "BMT Fourth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251229131126/https://en.wikipedia.org/wiki/Bay_Ridge_Avenue_(BMT_Fourth_Avenue_Line)", "kind": "wikipedia", "quote": "Bay Ridge Avenue station ... opened on January 15, 1916.", "tier": "tertiary", "title": "Bay Ridge Avenue station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Bay_Ridge_Avenue_(BMT_Fourth_Avenue_Line)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613163612/https://books.google.com/books?id=rpglAQAAIAAJ&q=culver+line&pg=PA252#v=snippet&q=culver%20line&f=false", "kind": "primary", "publisher": "New York State Senate", "quote": "Government records (New York State Senate Documents, 1917) cited by Wikipedia as primary source for January 15, 1916 opening.", "tier": "primary", "title": "Documents of the Senate of the State of New York (1917)", "url": "https://books.google.com/books?id=rpglAQAAIAAJ&q=culver+line&pg=PA252", "via": "https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260513003047/https://bklyn.newspapers.com/image/55570240/?terms=fourth+avenue+line+opening", "kind": "news", "publisher": "The Brooklyn Daily Eagle", "quote": "Subway Running To Eighty-Sixth Street Starts Building Boom In Bay Ridge [dated January 15, 1916 — day of opening]", "tier": "secondary", "title": "Subway Running To Eighty-Sixth Street Starts Building Boom In Bay Ridge — The Brooklyn Daily Eagle", "url": "http://bklyn.newspapers.com/image/55570240/?terms=fourth+avenue+line+opening", "via": "https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line" } ], "stationCount": 3 }, { "confidence": "high", "constructionStart": "1923", "cost": { "basis": "budget", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": false, "value": 1500000, "year": 1923 }, "notes": "Contract 11B for the half-mile extension was awarded to the T. A. Gillespie Company for $1.5 million; this is the construction contract price (price level c.1923 when the contract was awarded), not a later outturn figure. [Citation chase 2026-06-11] The exact contract bid was $1,485,151 (Brooklyn Daily Eagle, \"$1,485,151 Bid Wins Contract To Build Ft. Hamilton Tube,\" Dec 28, 1922), which Wikipedia rounds to $1.5M. The NYT opening-day article (Nov 1, 1925) reports an actual outturn of $2,000,000 for the completed extension — higher than this contract-award figure.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260609055255/https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line", "kind": "wikipedia", "quote": "The final extension to 95th Street, Route 18, opened on October 31, 1925.", "tier": "tertiary", "title": "BMT Fourth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260609055255/https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line", "kind": "wikipedia", "quote": "the Transit Commission announced that it had awarded the contract for the construction of a half-mile extension of the Fourth Avenue Line, Contract 11B, to T. A. Gillespie Company for $1.5 million.", "tier": "tertiary", "title": "BMT Fourth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260609055255/https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line", "kind": "wikipedia", "quote": "Construction began on December 17, 1923.", "tier": "tertiary", "title": "BMT Fourth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20260513003031/https://bklyn.newspapers.com/image/60029896/?terms=Fourth+Avenue+Subway", "kind": "news", "publisher": "The Brooklyn Daily Eagle", "quote": "$1,485,151 Bid Wins Contract To Build Ft. Hamilton Tube", "tier": "secondary", "title": "$1,485,151 Bid Wins Contract To Build Ft. Hamilton Tube", "url": "https://bklyn.newspapers.com/image/60029896/?terms=Fourth+Avenue+Subway", "via": "https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line" } ] }, "geometryRef": "nyc-BMT Fourth Avenue Line", "id": "nyc-bmt-fourth-avenue-line-19251031-3", "kind": "extension", "label": { "en": "Final extension: 86th Street → Bay Ridge–95th Street (Contract 11B / Route 18)" }, "notes": "Added the Bay Ridge–95th Street terminal (1 new station). Built as a two-track stub with provisions for a future extension toward Staten Island that was never built. Construction started December 17, 1923. [Date chase 2026-06-12] Wikipedia context: contract awarded Dec 28, 1922; original contractor withdrew Mar 7, 1923; Board of Estimate reapproved Nov 2, 1923; construction began Dec 17, 1923. Underlying NYT 1925 opening-day article and Rogoff 1961 ERA bulletin were inaccessible (paywall / dead link); year 1923 confirmed via the Wikipedia secondary-source text itself. [Opening-date chase 2026-06-13] Same-day Brooklyn Daily Eagle gives the precise first-train time (2 p.m. on October 31, 1925); next-day NYT confirms the opening.", "opened": "1925-10-31", "segment": { "fromStopIndex": 15, "toStopIndex": 16 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260609055255/https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line", "kind": "wikipedia", "quote": "The final extension to 95th Street, Route 18, opened on October 31, 1925.", "tier": "tertiary", "title": "BMT Fourth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260609055255/https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line", "kind": "wikipedia", "quote": "the Transit Commission announced that it had awarded the contract for the construction of a half-mile extension of the Fourth Avenue Line, Contract 11B, to T. A. Gillespie Company for $1.5 million.", "tier": "tertiary", "title": "BMT Fourth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260609055255/https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line", "kind": "wikipedia", "quote": "Construction began on December 17, 1923.", "tier": "tertiary", "title": "BMT Fourth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260517010114/https://www.newspapers.com/image/59905307/?terms=95th+street+subway", "kind": "news", "publisher": "Brooklyn Daily Eagle", "quote": "95th St. Subway Extension Opened At 2 P. M. Today [October 31, 1925]", "tier": "secondary", "title": "95th St. Subway Extension Opened At 2 P. M. Today — Brooklyn Daily Eagle", "url": "https://www.newspapers.com/image/59905307/?terms=95th+street+subway", "via": "https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250906213603/https://www.nytimes.com/1925/11/01/archives/open-subway-line-to-fort-hamilton-fourth-avenue-extension-put-in.html", "kind": "news", "publisher": "The New York Times", "quote": "Open Subway Line To Fort Hamilton; Fourth Avenue Extension Put in Service After Wait of Four Years. Half-Mile Cost $2,000,000 [published November 1, 1925, reporting on October 31, 1925 opening]", "tier": "secondary", "title": "Open Subway Line To Fort Hamilton; Fourth Avenue Extension Put in Service After Wait of Four Years — The New York Times", "url": "https://www.nytimes.com/1925/11/01/archives/open-subway-line-to-fort-hamilton-fourth-avenue-extension-put-in.html", "via": "https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260609055255/https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line", "kind": "wikipedia", "quote": "the opening was delayed a day to June 22, 1915, when the line opened from the Manhattan Bridge through to the Sea Beach Line.", "tier": "tertiary", "title": "BMT Fourth Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Fourth_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251220004518/https://en.wikipedia.org/wiki/45th_Street_station_(BMT_Fourth_Avenue_Line)", "kind": "wikipedia", "quote": "The 45th and 53rd Street stations opened on September 22, 1915.", "tier": "tertiary", "title": "45th Street station (BMT Fourth Avenue Line) — Wikipedia", "url": "https://en.wikipedia.org/wiki/45th_Street_station_(BMT_Fourth_Avenue_Line)" } ] }, { "cityId": "nyc", "color": "#996633", "displayNumber": "BMT Nassau Street Line", "id": "nyc-line-bmt-nassau-street-line", "name": { "en": "BMT Nassau Street Line" }, "phases": [ { "confidence": "high", "constructionStart": "1907", "geometryRef": null, "id": "nyc-bmt-nassau-street-line-19080916-0", "kind": "initial", "label": { "en": "Initial section opens: Williamsburg Bridge → Essex Street (Delancey Street subway)" }, "notes": "[Opening-date chase 2026-06-13] September 16, 1908 marked the start of through BRT subway service from the Williamsburg Bridge to Essex Street; the mayor drove a ceremonial train the same day the public service opened (NYT day-after report titled 'opening of the service'). An uncited nycsubway.org table lists July 4, 1908, likely a different surface/trolley event.", "opened": "1908-09-16", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260411014651/https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line", "kind": "wikipedia", "quote": "The BRT began operating through a short piece of subway, coming off the Williamsburg Bridge under Delancey Street to Essex Street, on September 16, 1908.", "tier": "tertiary", "title": "BMT Nassau Street Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260411014651/https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line", "kind": "wikipedia", "quote": "Construction contracts for the main line in Manhattan were awarded in early 1907", "tier": "tertiary", "title": "BMT Nassau Street Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20241201190316/https://www.newspapers.com/article/new-york-tribune-bids-for-subway-loop/124798801/", "kind": "news", "publisher": "New-York Tribune", "quote": "Bids for Subway Loop [New-York Tribune, March 13, 1907, page 5 — cited in Wikipedia as sourcing 'The city began receiving bids for the sections under Centre Street in March 1907']", "tier": "primary", "title": "Bids for Subway Loop", "url": "https://www.newspapers.com/article/new-york-tribune-bids-for-subway-loop/124798801/", "via": "https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20250911213958/https://www.newspapers.com/article/the-brooklyn-citizen-expect-many-bidders/124798591/", "kind": "news", "publisher": "The Brooklyn Citizen", "quote": "Expect Many Bidders [The Brooklyn Citizen, March 23, 1907, page 12 — cited in Wikipedia alongside the March 1907 construction bid context]", "tier": "primary", "title": "Expect Many Bidders", "url": "https://www.newspapers.com/article/the-brooklyn-citizen-expect-many-bidders/124798591/", "via": "https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20250916053304/https://books.google.com/books?id=ImLOAAAAMAAJ&pg=RA2-PA147-IA1", "kind": "primary", "publisher": "New York City Office of the Comptroller", "quote": "[Referenced in Wikipedia for the five-section division of construction contracts; Google Books preview did not render full text to extract a verbatim quote.]", "tier": "primary", "title": "Comptroller's Monthly Report, 1916", "url": "https://books.google.com/books?id=ImLOAAAAMAAJ&pg=RA2-PA147-IA1", "via": "https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250116085800/https://www.nytimes.com/1908/09/17/archives/mayor-runs-a-train-over-new-bridge-brooklyn-celebrates-opening-of.html", "kind": "news", "publisher": "The New York Times", "quote": "[Day-after report on September 16, 1908 opening; title confirms 'opening of the service' on that date. Paywalled — could not access full text.]", "tier": "secondary", "title": "Mayor Runs a Train Over New Bridge; Brooklyn Celebrates Opening of the Service with Red Fire and Oratory", "url": "https://www.nytimes.com/1908/09/17/archives/mayor-runs-a-train-over-new-bridge-brooklyn-celebrates-opening-of.html", "via": "https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line" } ], "stationCount": 1 }, { "confidence": "high", "geometryRef": "nyc-BMT Nassau Street Line", "id": "nyc-bmt-nassau-street-line-19130804-1", "kind": "extension", "label": { "en": "Centre Street Loop extension: Essex Street → Chambers Street (Bowery, Canal Street, Chambers Street)" }, "notes": "[Opening-date chase 2026-06-13] August 4, 1913 was true public revenue service: the NYT 'Passenger Killed On Loop's First Day' (Aug 5, 1913) reports a passenger fatality on the opening day, confirming public operation rather than a VIP-only ceremony. A PSC document expected service 'by August 1, 1913', a few days before the actual opening.", "opened": "1913-08-04", "segment": { "fromStopIndex": 2, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260411014651/https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line", "kind": "wikipedia", "quote": "The Centre Street Loop was opened to Chambers Street on August 4, 1913, with temporary operation at first on the two west tracks.", "tier": "tertiary", "title": "BMT Nassau Street Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260411014651/https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line", "kind": "wikipedia", "quote": "The BRT tunnel under Centre Street was completed by 1910, except for the section under the Municipal Building", "tier": "tertiary", "title": "BMT Nassau Street Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250908000853/https://www.nytimes.com/1913/08/05/archives/passenger-killed-on-loops-first-day-printer-impatient-at-delay-in.html", "kind": "news", "publisher": "The New York Times", "quote": "[August 5, 1913 day-after report — headline 'Loop's First Day' confirms August 4 as the public opening day. Paywalled — could not access full text.]", "tier": "secondary", "title": "Passenger Killed On Loop's First Day; Printer, Impatient at Delay in New Bridge Subway, Tries to Walk the Track", "url": "https://www.nytimes.com/1913/08/05/archives/passenger-killed-on-loops-first-day-printer-impatient-at-delay-in.html", "via": "https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20120805035236/http://www.nycsubway.org:80/articles/newsubways1.html", "kind": "primary", "publisher": "nycsubway.org (hosting PSC document)", "quote": "It is expected that this temporary operation will begin by August 1, 1913. [Written before the actual opening; the actual opening was August 4 — a 3-day slip from the expected date.]", "tier": "primary", "title": "New Subways For New York: The Dual System of Rapid Transit, Chapter 1 — Public Service Commission", "url": "http://www.nycsubway.org/articles/newsubways1.html", "via": "https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line" } ], "stationCount": 3 }, { "confidence": "low", "geometryRef": null, "id": "nyc-bmt-nassau-street-line-19150622-2", "kind": "extension", "label": { "en": "Manhattan Bridge south tracks placed in service into Chambers Street" }, "notes": "[Opening-date chase 2026-06-13] The June 22, 1915 in-service date for the Manhattan Bridge south tracks rests on Wikipedia's citation to The City Record (Oct 15, 1915, p. 7827), an official NYC journal; the Google Books page text was not directly accessible. nycsubway.org corroborates 1915 as the year the Chambers Street connection to the Manhattan Bridge was established.", "opened": "1915-06-22", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260411014651/https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line", "kind": "wikipedia", "quote": "The south tracks on the Manhattan Bridge, also running into Chambers Street, were placed in service on June 22, 1915.", "tier": "tertiary", "title": "BMT Nassau Street Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line" } ] }, { "confidence": "medium", "constructionStart": "1928", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "USD", "isEstimate": false, "value": 10072000, "year": 1931 }, "notes": "Total construction cost $10.072 million for 0.9 miles (1.4 km) of new tunnels. Split between two contracts awarded by the Board of Transportation in November 1927: Marcus Contracting Company built the portion north of Liberty Street (incl. Fulton Street station) for $4.7M; Moranti and Raymond built the southern portion for $5.7M. Contracts approved by the Board of Estimate in January 1928; construction by cut-and-cover. Figure is in late-1920s/1931 dollars. [Citation chase 2026-06-11] The $10.072M is the final as-built cost per the NYT (May 10, 1931); the initial two-contract award total in Nov 1927 was $10,458,034, so the project closed slightly under the contracted amount.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260411014651/https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line", "kind": "wikipedia", "quote": "The Nassau Street Loop opened at 3 p.m. on May 29, 1931, when Mayor Jimmy Walker took the controls of a train of D-type Triplex cars from Chambers Street to Broad Street.", "tier": "tertiary", "title": "BMT Nassau Street Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260411014651/https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line", "kind": "wikipedia", "quote": "The total construction cost was $10.072 million for 0.9 miles (1.4 km) of new tunnels.", "tier": "tertiary", "title": "BMT Nassau Street Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260411014651/https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line", "kind": "wikipedia", "quote": "The Marcus Contracting Company was hired to build the portion north of Liberty Street, including the Fulton Street station, for $4.7 million, while Moranti and Raymond were hired to build the portion to the south for $5.7 million.", "tier": "tertiary", "title": "BMT Nassau Street Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line" }, { "accessedAt": "2026-06-11", "kind": "news", "publisher": "The New York Times", "quote": "Cost $10,072,000 To Build It", "tier": "secondary", "title": "Nassau St. Subway To Open On May 30; Its Construction an Engineering Feat Because Many Buildings Had to Be Underpinned. Cost $10,072,000 To Build It Will Link B.M.T.'s Centre Street Loop With Tunnel Under East River.", "url": "https://www.nytimes.com/1931/05/10/archives/nassau-st-subway-to-open-on-may-30-its-construction-an-engineering.html", "via": "https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20241201184839/https://www.nytimes.com/1927/11/24/archives/awards-contracts-for-nassau-st-links-board-lets-out-work-on-two.html", "kind": "news", "publisher": "The New York Times", "quote": "Awards Contracts for Nassau St. Links; Board Lets Out Work on Two Subway Sections for $10,458,034", "tier": "secondary", "title": "Awards Contracts for Nassau St. Links; Board Lets Out Work on Two Subway Sections for $10,458,034", "url": "https://www.nytimes.com/1927/11/24/archives/awards-contracts-for-nassau-st-links-board-lets-out-work-on-two.html", "via": "https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line" } ] }, "geometryRef": "nyc-BMT Nassau Street Line", "id": "nyc-bmt-nassau-street-line-19310529-3", "kind": "extension", "label": { "en": "Nassau Street Loop extension: Chambers Street → Broad Street (Fulton Street, Broad Street), connecting to the Montague Street Tunnel" }, "notes": "[Date chase 2026-06-12] Contracts were awarded November 1927 (NYT Nov 24 1927) but the Board of Estimate did not approve them until January 1928, which is the effective construction-start point reflected in the curated 1928 year. [Opening-date chase 2026-06-13] May 29, 1931 is the ceremonial opening (Mayor Jimmy Walker took the controls at 3 p.m.); contemporary sources (NYT pre-announcement 'Open On May 30', Herald Tribune) indicate full public revenue service began May 30, 1931. A day-level distinction within the same year.", "opened": "1931-05-29", "segment": { "fromStopIndex": 0, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260411014651/https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line", "kind": "wikipedia", "quote": "The Nassau Street Loop opened at 3 p.m. on May 29, 1931, when Mayor Jimmy Walker took the controls of a train of D-type Triplex cars from Chambers Street to Broad Street.", "tier": "tertiary", "title": "BMT Nassau Street Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260411014651/https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line", "kind": "wikipedia", "quote": "The total construction cost was $10.072 million for 0.9 miles (1.4 km) of new tunnels.", "tier": "tertiary", "title": "BMT Nassau Street Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260411014651/https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line", "kind": "wikipedia", "quote": "The Marcus Contracting Company was hired to build the portion north of Liberty Street, including the Fulton Street station, for $4.7 million, while Moranti and Raymond were hired to build the portion to the south for $5.7 million.", "tier": "tertiary", "title": "BMT Nassau Street Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20241201184210/https://www.nytimes.com/1928/01/27/archives/approves-open-cut-for-nassau-st-link-estimate-board-overrules-the.html", "kind": "news", "publisher": "The New York Times", "quote": "[January 27, 1928 — Board of Estimate approval of construction method, cited in Wikipedia as the enabling step for construction to begin in January 1928.]", "tier": "primary", "title": "Approves Open Cut for Nassau St. Link; Estimate Board Overrules the Pleas for Tunnel Method of Subway Construction", "url": "https://www.nytimes.com/1928/01/27/archives/approves-open-cut-for-nassau-st-link-estimate-board-overrules-the.html", "via": "https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line" }, { "accessedAt": "2026-06-12", "kind": "news", "publisher": "The New York Times", "quote": "[May 10, 1931 — cited in Wikipedia for construction cost and engineering details; the companion New York Herald Tribune article of same date states 'City Labored Three Years on Engineering Projects,' corroborating a ~1928 construction start.]", "tier": "primary", "title": "Nassau St. Subway To Open On May 30; Its Construction an Engineering Feat Because Many Buildings Had to Be Underpinned.", "url": "https://www.nytimes.com/1931/05/10/archives/nassau-st-subway-to-open-on-may-30-its-construction-an-engineering.html", "via": "https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20241201184839/https://www.nytimes.com/1927/11/24/archives/awards-contracts-for-nassau-st-links-board-lets-out-work-on-two.html", "kind": "news", "publisher": "The New York Times", "quote": "[November 24, 1927 — contracts awarded to Marcus Contracting and Moranti and Raymond; BOE approval still pending, placing actual construction start in 1928.]", "tier": "primary", "title": "Awards Contracts for Nassau St. Links; Board Lets Out Work on Two Subway Sections for $10,458,034", "url": "https://www.nytimes.com/1927/11/24/archives/awards-contracts-for-nassau-st-links-board-lets-out-work-on-two.html", "via": "https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250426101929/https://www.nytimes.com/1931/05/30/archives/mayor-drives-train-in-new-subway-link-the-mayor-becomes-a-motorman.html", "kind": "news", "publisher": "The New York Times", "quote": "[May 30, 1931 — next-day report of the opening; consistent with either a May 29 ceremonial opening or May 30 public opening. Paywalled — could not access full text.]", "tier": "secondary", "title": "Mayor Drives Train In New Subway Link; The Mayor Becomes A Motorman", "url": "https://www.nytimes.com/1931/05/30/archives/mayor-drives-train-in-new-subway-link-the-mayor-becomes-a-motorman.html", "via": "https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line" } ], "stationCount": 2 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260411014651/https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line", "kind": "wikipedia", "quote": "The BRT began operating through a short piece of subway, coming off the Williamsburg Bridge under Delancey Street to Essex Street, on September 16, 1908.", "tier": "tertiary", "title": "BMT Nassau Street Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Nassau_Street_Line" } ] }, { "cityId": "nyc", "color": "#FCCC0A", "displayNumber": "BMT Sea Beach Line", "id": "nyc-line-bmt-sea-beach-line", "name": { "en": "BMT Sea Beach Line" }, "phases": [ { "confidence": "medium", "geometryRef": null, "id": "nyc-bmt-sea-beach-line-18770718-0", "kind": "initial", "label": { "en": "New York and Sea Beach Railroad (predecessor steam excursion railroad) opens to Coney Island" }, "notes": "Predecessor right-of-way: a steam-powered excursion railroad organized 25 Sep 1876, not the current rapid-transit line. The modern four-track rapid-transit Sea Beach Line was built later on/near this alignment under the Dual Contracts. Included for historical continuity of the corridor.", "opened": "1877-07-18", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611125101/https://en.wikipedia.org/wiki/BMT_Sea_Beach_Line", "kind": "wikipedia", "quote": "The New York and Sea Beach Railroad was organized on September 25, 1876, as a steam-powered excursion railroad. It opened ... to Coney Island on July 18, 1877.", "tier": "tertiary", "title": "BMT Sea Beach Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Sea_Beach_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260305142234/https://www.nycsubway.org/wiki/BMT_Sea_Beach_Line", "kind": "other", "quote": "The Sea Beach Line began service on July 18th, 1877 as a steam railroad called the New York and Sea Beach", "tier": "secondary", "title": "BMT Sea Beach Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/BMT_Sea_Beach_Line" } ] }, { "confidence": "medium", "constructionStart": "1913", "geometryRef": "nyc-BMT Sea Beach Line", "id": "nyc-bmt-sea-beach-line-19150622-1", "kind": "initial", "label": { "en": "Dual Contracts four-track open-cut rapid transit line opens: Coney Island → Chambers Street (via 4th Avenue Subway)" }, "notes": "The Sea Beach Line as it exists today: a four-track open cut/embankment built by the BRT under the Dual Contracts, connecting to the BMT Fourth Avenue Subway at 59th Street. Trolley cars first used the new open cut between Avenue T and 86th Street on 9 Jan 1914; subway test cars ran from 16 Mar 1915; full subway service opened 22 Jun 1915 from Coney Island to Chambers Street, Lower Manhattan. Station count of 10 reflects the present-day Sea Beach stations. No segment-specific construction cost figure is reliably sourced; the Dual Contracts were a large multi-line program and no isolated Sea Beach figure was found. [Date chase 2026-06-12] The primary footnote source on Wikipedia (Electric Railroaders' Association bulletin) was inaccessible (404), but the 1913 start is independently supported by nycsubway.org's explicit timeline and corroborated by the Dual Contracts signing (March 19, 1913). [Opening-date chase 2026-06-13] Wikipedia describes June 22, 1915 as the start of full subway service; NYT articles from June 19-20, 1915 suggest a partial/ceremonial opening a few days earlier. Year unaffected.", "opened": "1915-06-22", "segment": { "fromStopIndex": 0, "toStopIndex": 10 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611125101/https://en.wikipedia.org/wiki/BMT_Sea_Beach_Line", "kind": "wikipedia", "quote": "until the line opened for full subway service on June 22, 1915, with trains running between Coney Island and Chambers Street in Lower Manhattan.", "tier": "tertiary", "title": "BMT Sea Beach Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Sea_Beach_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260305142234/https://www.nycsubway.org/wiki/BMT_Sea_Beach_Line", "kind": "other", "quote": "Between 1913 and 1915 as part of the Dual Contracts, the Sea Beach line as we know it today was built", "tier": "secondary", "title": "BMT Sea Beach Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/BMT_Sea_Beach_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611125101/https://en.wikipedia.org/wiki/BMT_Sea_Beach_Line", "kind": "wikipedia", "quote": "Trolley cars started using the new open cut between Avenue T and 86th Street on January 9, 1914", "tier": "tertiary", "title": "BMT Sea Beach Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Sea_Beach_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260411013447/https://en.wikipedia.org/wiki/Dual_Contracts", "kind": "other", "publisher": "Wikipedia", "quote": "The Dual Contracts were signed on March 19, 1913. ... BMT Sea Beach Line: Sea Beach Line from Fourth Avenue Subway to 86th Street. Four-track open cut.", "tier": "tertiary", "title": "Dual Contracts — Wikipedia", "url": "https://en.wikipedia.org/wiki/Dual_Contracts", "via": "https://en.wikipedia.org/wiki/BMT_Sea_Beach_Line" } ], "stationCount": 10 }, { "confidence": "high", "geometryRef": null, "id": "nyc-bmt-sea-beach-line-19170904-2", "kind": "extension", "label": { "en": "Manhattan service via Manhattan Bridge / BMT Broadway Line opens (north-side bridge tracks)" }, "notes": "Sea Beach/BRT trains gained access to Manhattan over the north side of the Manhattan Bridge with the partial opening of the BMT Broadway Line; this is a downtown-end extension of the route's reach rather than new track on the Sea Beach right-of-way itself. [Opening-date chase 2026-06-13] Sept 4, 1917 reflects public/revenue service start (8 PM), preceded by a 2 PM VIP/ceremonial run. The Sept 5, 1917 date in the Stillwell Avenue article is the NYT publication date, not the opening date.", "opened": "1917-09-04", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611125101/https://en.wikipedia.org/wiki/BMT_Sea_Beach_Line", "kind": "wikipedia", "quote": "The tracks over the north side of the Manhattan Bridge opened on September 4, 1917, along with part of the BMT Broadway Line.", "tier": "tertiary", "title": "BMT Sea Beach Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Sea_Beach_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260522002812/https://en.wikipedia.org/wiki/BMT_Broadway_Line", "kind": "other", "publisher": "Wikipedia", "quote": "A short portion of the line, coming off the north side of the Manhattan Bridge through Canal Street to 14th Street–Union Square, opened on September 4, 1917, at 2 P.M., with an eight car train carrying members of the Public Service Commission, representatives of the city government and officials of the BRT, leaving Union Square toward Coney Island. Service opened to the general public at 8 P.M., with trains leaving Union Square and Coney Island simultaneously.", "tier": "tertiary", "title": "BMT Broadway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Broadway_Line", "via": "https://en.wikipedia.org/wiki/BMT_Sea_Beach_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251006002918/https://www.nytimes.com/1917/09/05/archives/open-first-section-of-broadway-line-train-carrying-1000-passengers.html", "kind": "news", "publisher": "The New York Times", "quote": "Open First Section of Broadway Line; Train Carrying 1,000 Passengers Runs from Fourteenth Street to Coney Island. Regular Service Begins.", "tier": "secondary", "title": "Open First Section of Broadway Line; Train Carrying 1,000 Passengers Runs from Fourteenth Street to Coney Island — The New York Times", "url": "https://www.nytimes.com/1917/09/05/archives/open-first-section-of-broadway-line-train-carrying-1000-passengers.html", "via": "https://en.wikipedia.org/wiki/BMT_Sea_Beach_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260601184141/https://en.wikipedia.org/wiki/Coney_Island%E2%80%93Stillwell_Avenue_station", "kind": "other", "publisher": "Wikipedia", "quote": "The BRT-operated Sea Beach Line, which served the terminal, opened on September 5, 1917", "tier": "tertiary", "title": "Coney Island–Stillwell Avenue station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Coney_Island%E2%80%93Stillwell_Avenue_station", "via": "https://en.wikipedia.org/wiki/BMT_Sea_Beach_Line" } ] }, { "confidence": "high", "geometryRef": null, "id": "nyc-bmt-sea-beach-line-19180105-3", "kind": "extension", "label": { "en": "Broadway Line service extended to Times Square–42nd Street" }, "notes": "Northward extension of the Manhattan (Broadway Line) end of the through service to Times Square–42nd Street; not new Sea Beach right-of-way track.", "opened": "1918-01-05", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611125101/https://en.wikipedia.org/wiki/BMT_Sea_Beach_Line", "kind": "wikipedia", "quote": "This was extended to Times Square–42nd Street on January 5, 1918.", "tier": "tertiary", "title": "BMT Sea Beach Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Sea_Beach_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260522002812/https://en.wikipedia.org/wiki/BMT_Broadway_Line", "kind": "other", "publisher": "Wikipedia", "quote": "On January 5, 1918, the line was extended north to Times Square–42nd Street and south to Rector Street. Express service via the line began, with Sea Beach and West End trains that had been running local becoming expresses.", "tier": "tertiary", "title": "BMT Broadway Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Broadway_Line", "via": "https://en.wikipedia.org/wiki/BMT_Sea_Beach_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20210831204326/https://timesmachine.nytimes.com/timesmachine/1918/01/06/102652686.pdf", "kind": "news", "publisher": "The New York Times", "quote": "Open New Subway To Times Square; Brooklyn Directly Connected with Wholesale and Shopping Districts of New York. Nickel Zone Is Extended. First Train in Broadway Tube Makes Run from Rector Street in 17 Minutes.", "tier": "secondary", "title": "Open New Subway To Times Square; Brooklyn Directly Connected with Wholesale and Shopping Districts of New York — The New York Times, January 6, 1918", "url": "https://timesmachine.nytimes.com/timesmachine/1918/01/06/102652686.pdf", "via": "https://en.wikipedia.org/wiki/BMT_Broadway_Line" } ] }, { "confidence": "medium", "geometryRef": null, "id": "nyc-bmt-sea-beach-line-19190530-4", "kind": "extension", "label": { "en": "Sea Beach trains begin using new Coney Island–Stillwell Avenue terminal" }, "notes": "The Sea Beach Line's permanent southern terminus, the rebuilt Coney Island–Stillwell Avenue terminal. SOURCE CONFLICT on the Sea Beach start date: nycsubway.org states 'Sea Beach trains began using the new Stillwell Avenue – Coney Island terminal on May 30th, 1919'; the West End Line started 23 Dec 1918 and the Brighton Line 29 May 1919. Wikipedia's Stillwell Avenue station article instead asserts the Sea Beach Line 'opened on September 5, 1917' at the terminal, which appears to conflate the 1915/1917 Sea Beach opening with the later terminal. Using the nycsubway.org date (30 May 1919) as the most specific terminal-service date; discrepancy recorded. [Opening-date chase 2026-06-13] The terminal formally opened May 29, 1919 with the Brighton Line; Sea Beach trains specifically began using it on May 30, 1919 (Stanton 1998 / nycsubway.org), which the curated date tracks.", "opened": "1919-05-30", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260305142234/https://www.nycsubway.org/wiki/BMT_Sea_Beach_Line", "kind": "other", "quote": "Sea Beach trains began using the new Stillwell Avenue - Coney Island terminal on May 30th, 1919.", "tier": "secondary", "title": "BMT Sea Beach Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/BMT_Sea_Beach_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260601184141/https://en.wikipedia.org/wiki/Coney_Island%E2%80%93Stillwell_Avenue_station", "kind": "wikipedia", "quote": "the BRT West End Line had been similarly inaugurated on December 23, 1918 ... The terminal officially opened on May 29, 1919, when the new Brighton Line opened.", "tier": "tertiary", "title": "Coney Island–Stillwell Avenue station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Coney_Island%E2%80%93Stillwell_Avenue_station" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260113020148/https://www.westland.net/coneyisland/articles/transportation.htm", "kind": "other", "publisher": "westland.net / Jeffrey Stanton", "quote": "Sea Beach trains began using the new Stillwell Avenue terminal on May 30, 1919.", "tier": "secondary", "title": "Coney Island History — Development of Rail and Steamboat Lines to the Resort (Stanton 1998)", "url": "http://www.westland.net/coneyisland/articles/transportation.htm", "via": "https://en.wikipedia.org/wiki/Coney_Island%E2%80%93Stillwell_Avenue_station" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611125101/https://en.wikipedia.org/wiki/BMT_Sea_Beach_Line", "kind": "wikipedia", "quote": "The New York and Sea Beach Railroad was organized on September 25, 1876, as a steam-powered excursion railroad. It opened ... to Coney Island on July 18, 1877.", "tier": "tertiary", "title": "BMT Sea Beach Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Sea_Beach_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260305142234/https://www.nycsubway.org/wiki/BMT_Sea_Beach_Line", "kind": "other", "quote": "The Sea Beach Line began service on July 18th, 1877 as a steam railroad called the New York and Sea Beach", "tier": "secondary", "title": "BMT Sea Beach Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/BMT_Sea_Beach_Line" } ] }, { "cityId": "nyc", "color": "#FF6319", "displayNumber": "BMT West End Line", "id": "nyc-line-bmt-west-end-line", "name": { "en": "BMT West End Line" }, "phases": [ { "confidence": "medium", "geometryRef": null, "id": "nyc-bmt-west-end-line-18631009-0", "kind": "initial", "label": { "en": "Surface steam railroad opens: 25th Street & Fifth Avenue (Brooklyn) → Bath Beach (Brooklyn, Bath and Coney Island Rail Road, 'Gunther's Road')" }, "notes": "[Opening-date chase 2026-06-13] nycsubway.org's '1862' conflates incorporation with opening; revenue-service opening was October 9, 1863 per contemporary Brooklyn Daily Eagle coverage.", "opened": "1863-10-09", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251115164546/https://en.wikipedia.org/wiki/West_End_Line_(Brooklyn_surface)", "kind": "wikipedia", "quote": "opened the first part of its line, from 25th Street and Fifth Avenue to Bath Beach mainly along New Utrecht Avenue (then the Bath Plank Road), on October 9, 1863.", "tier": "tertiary", "title": "West End Line (Brooklyn surface) — Wikipedia", "url": "https://en.wikipedia.org/wiki/West_End_Line_(Brooklyn_surface)" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260104030223/https://www.nycsubway.org/wiki/BMT_West_End_Line", "kind": "other", "quote": "opened in 1862 as the Brooklyn, Bath & Coney Island Railroad", "tier": "secondary", "title": "BMT West End Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/BMT_West_End_Line" } ] }, { "confidence": "medium", "geometryRef": null, "id": "nyc-bmt-west-end-line-18640609-1", "kind": "extension", "label": { "en": "Surface line extended to Coney Island (first steam railroad to Coney Island beaches)" }, "opened": "1864-06-09", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251115164546/https://en.wikipedia.org/wiki/West_End_Line_(Brooklyn_surface)", "kind": "wikipedia", "quote": "The extension to Coney Island was opened on June 9, 1864, making it the first steam railroad to bring beachgoers from downtown Brooklyn.", "tier": "tertiary", "title": "West End Line (Brooklyn surface) — Wikipedia", "url": "https://en.wikipedia.org/wiki/West_End_Line_(Brooklyn_surface)" } ] }, { "confidence": "high", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": true, "value": 3000000, "year": 1916 }, "notes": "Approx. $3,000,000 for Route 39, Section 1 (the elevated structure), executed on a cost-plus basis per nycsubway.org's contemporaneous contract data; figure covers the elevated reconstruction works, not this single sub-segment alone. [Citation chase 2026-06-11] Per nycsubway.org, Section 1 (~$3,000,000, force account) is the Fourth Avenue subway reconstruction/connection work, NOT the elevated structure — the elevated portion over New Utrecht Ave is Route 39 Section 2 ($1,682,040, fixed contract). Source phrasing (\"was executed ... at a cost of about $3,000,000\") indicates a reported actual (outturn), so isEstimate may be incorrect.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260128000955/https://en.wikipedia.org/wiki/BMT_West_End_Line", "kind": "wikipedia", "quote": "The first portion of the line, between the 36th Street station on Fourth Avenue and 62nd Street station, opened on June 24, 1916, with two tracks. On the same date, the line opened three more stations to 18th Avenue, but with only one track in service.", "tier": "tertiary", "title": "BMT West End Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_West_End_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260104030223/https://www.nycsubway.org/wiki/BMT_West_End_Line", "kind": "other", "quote": "Route 39, Section 1: Approximately $3,000,000 (executed on cost-plus basis)", "tier": "secondary", "title": "BMT West End Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/BMT_West_End_Line" } ] }, "geometryRef": "nyc-BMT West End Line", "id": "nyc-bmt-west-end-line-19160624-2", "kind": "initial", "label": { "en": "Dual Contracts elevated opens: 36th Street (Fourth Ave) → 62nd Street (two tracks), with single-track service continuing to 18th Avenue" }, "notes": "[Opening-date chase 2026-06-13] nycsubway.org's 9/15/1916 likely reflects a later upper-level platform event; the June 24, 1916 segment opening to 18th Avenue (single-track beyond 62nd St) is the revenue-service opening, per contemporary newspaper reports.", "opened": "1916-06-24", "segment": { "fromStopIndex": 0, "toStopIndex": 5 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260128000955/https://en.wikipedia.org/wiki/BMT_West_End_Line", "kind": "wikipedia", "quote": "The first portion of the line, between the 36th Street station on Fourth Avenue and 62nd Street station, opened on June 24, 1916, with two tracks. On the same date, the line opened three more stations to 18th Avenue, but with only one track in service.", "tier": "tertiary", "title": "BMT West End Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_West_End_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260104030223/https://www.nycsubway.org/wiki/BMT_West_End_Line", "kind": "other", "quote": "Route 39, Section 1: Approximately $3,000,000 (executed on cost-plus basis)", "tier": "secondary", "title": "BMT West End Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/BMT_West_End_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260311110409/https://www.newspapers.com/image/55221837/?terms=subway", "kind": "news", "publisher": "Brooklyn Daily Eagle", "quote": "Brooklyn Daily Eagle, June 24, 1916 — 'First Train From Manhattan Over New L Extension of Dual System to Sixty-Second Street'", "tier": "secondary", "title": "Parade, Pageant Mark Celebration: West End Line Opened", "url": "https://www.newspapers.com/image/55221837/?terms=subway", "via": "https://en.wikipedia.org/wiki/BMT_West_End_Line" } ], "stationCount": 6 }, { "confidence": "medium", "geometryRef": "nyc-BMT West End Line", "id": "nyc-bmt-west-end-line-19160708-3", "kind": "extension", "label": { "en": "Second track opens: 62nd Street → 18th Avenue (full two-track elevated service over this section)" }, "opened": "1916-07-08", "segment": { "fromStopIndex": 5, "toStopIndex": 8 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260128000955/https://en.wikipedia.org/wiki/BMT_West_End_Line", "kind": "wikipedia", "quote": "The second track between 62nd Street and 18th Avenue opened on July 8, 1916.", "tier": "tertiary", "title": "BMT West End Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_West_End_Line" } ] }, { "confidence": "medium", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": false, "value": 1682040, "year": 1916 }, "notes": "Route 39, Section 2 contract: contractor bid $1,672,190; total cost of contract $1,682,040.03 per nycsubway.org contract data. Covers the Section 2 elevated works, not exclusively this opening date's stations. [Citation chase 2026-06-11] The $1,682,040.03 is the \"Total cost of contract\" (vs the $1,672,190 contractor's bid), indicating a settled final contract outturn for the entire Route 39 Section 2 elevated works (39th Street to Coney Island) rather than for the single 18th Ave→25th Ave segment opened July 29, 1916; the underlying NY State PSC 1916 Annual Report could not be verified (Google Books paywall), so the figure rests on the nycsubway.org transcription alone.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260128000955/https://en.wikipedia.org/wiki/BMT_West_End_Line", "kind": "wikipedia", "quote": "The line was then extended to 25th Avenue on July 29, 1916.", "tier": "tertiary", "title": "BMT West End Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_West_End_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260104030223/https://www.nycsubway.org/wiki/BMT_West_End_Line", "kind": "other", "quote": "Route 39, Section 2: \"$1,672,190\" contractor bid; \"Total cost of contract, $1,682,040.03\"", "tier": "secondary", "title": "BMT West End Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/BMT_West_End_Line" } ] }, "geometryRef": "nyc-BMT West End Line", "id": "nyc-bmt-west-end-line-19160729-4", "kind": "extension", "label": { "en": "Elevated extended: 18th Avenue → 25th Avenue (incl. Bay Parkway / 25th Avenue station)" }, "notes": "[Opening-date chase 2026-06-13] nycsubway.org lists December 29, 1916 for these three stations; Wikipedia's July 29, 1916 is preferred as it cites the contemporary Public Service Commission 1916 report.", "opened": "1916-07-29", "segment": { "fromStopIndex": 8, "toStopIndex": 11 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260128000955/https://en.wikipedia.org/wiki/BMT_West_End_Line", "kind": "wikipedia", "quote": "The line was then extended to 25th Avenue on July 29, 1916.", "tier": "tertiary", "title": "BMT West End Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_West_End_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260104030223/https://www.nycsubway.org/wiki/BMT_West_End_Line", "kind": "other", "quote": "Route 39, Section 2: \"$1,672,190\" contractor bid; \"Total cost of contract, $1,682,040.03\"", "tier": "secondary", "title": "BMT West End Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/BMT_West_End_Line" } ] }, { "confidence": "medium", "geometryRef": "nyc-BMT West End Line", "id": "nyc-bmt-west-end-line-19170721-5", "kind": "extension", "label": { "en": "Final elevated extension to Coney Island (line fully opens to Coney Island)" }, "notes": "[Opening-date chase 2026-06-13] nycsubway.org's 12/21/1917 conflicts with Wikipedia's July 21, 1917; the West End did not use the new Stillwell terminal until December 23, 1918, so the 1917 extension terminated short of Stillwell.", "opened": "1917-07-21", "segment": { "fromStopIndex": 11, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260128000955/https://en.wikipedia.org/wiki/BMT_West_End_Line", "kind": "wikipedia", "quote": "fully opening to Coney Island on July 21, 1917.", "tier": "tertiary", "title": "BMT West End Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_West_End_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260128000955/https://en.wikipedia.org/wiki/BMT_West_End_Line", "kind": "wikipedia", "quote": "Under the Dual Contracts of 1913, the line was rebuilt as an elevated line over New Utrecht Avenue, 86th Street and Stillwell Avenue, fully opening to Coney Island on July 21, 1917.", "tier": "tertiary", "title": "BMT West End Line — Wikipedia (Dual Contracts summary)", "url": "https://en.wikipedia.org/wiki/BMT_West_End_Line" } ] }, { "confidence": "medium", "geometryRef": null, "id": "nyc-bmt-west-end-line-19181223-6", "kind": "extension", "label": { "en": "West End service begins at new Coney Island–Stillwell Avenue terminal (West End & Sea Beach platforms open)" }, "opened": "1918-12-23", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260104030223/https://www.nycsubway.org/wiki/BMT_West_End_Line", "kind": "other", "quote": "West End & Sea Beach: 12/23/1918", "tier": "secondary", "title": "BMT West End Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/BMT_West_End_Line" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260128000955/https://en.wikipedia.org/wiki/BMT_West_End_Line", "kind": "wikipedia", "quote": "The first portion of the line, between the 36th Street station on Fourth Avenue and 62nd Street station, opened on June 24, 1916, with two tracks. On the same date, the line opened three more stations to 18th Avenue, but with only one track in service.", "tier": "tertiary", "title": "BMT West End Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_West_End_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260104030223/https://www.nycsubway.org/wiki/BMT_West_End_Line", "kind": "other", "quote": "opened in 1862 as the Brooklyn, Bath & Coney Island Railroad", "tier": "secondary", "title": "BMT West End Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/BMT_West_End_Line" } ] }, { "cityId": "nyc", "color": "#FF6319", "displayNumber": "BMT Brighton Line", "id": "nyc-line-bmt-brighton-line", "name": { "en": "BMT Brighton Line" }, "phases": [ { "confidence": "medium", "geometryRef": "nyc-BMT Brighton Line", "id": "nyc-bmt-brighton-line-18780702-0", "kind": "initial", "label": { "en": "Original line opens: Prospect Park (Willink Plaza) → Brighton Beach (Brooklyn, Flatbush and Coney Island Railway, surface steam railroad)" }, "notes": "Two-track surface-level excursion steam railroad to the Coney Island seaside resorts. The full original line opened August 18, 1878 (Wikipedia); contemporary sources note B.F.&C.I. trains began running to the LIRR Flatbush Avenue terminal on August 19, 1878 — the early-July date is the ceremonial/initial revenue opening of the main excursion stretch. [Opening-date chase 2026-06-13] Wikipedia notes the full original line (extension toward the LIRR connection) opened August 18, 1878 — a distinct later event, not a conflict with the July 2 Prospect Park–Brighton Beach opening.", "opened": "1878-07-02", "segment": { "fromStopIndex": 0, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260311070056/https://en.wikipedia.org/wiki/BMT_Brighton_Line", "kind": "wikipedia", "quote": "The Brighton Line opened from the Willink Plaza entrance of Prospect Park...to Brighton Beach...on July 2, 1878, and the full original line on August 18.", "tier": "tertiary", "title": "BMT Brighton Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Brighton_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260216015127/https://www.nycsubway.org/wiki/BMT_Brighton_Line", "kind": "other", "quote": "The line began service as the Brooklyn, Flatbush, and Coney Island Railroad on July 2, 1878 between Prospect Park and Brighton Beach Hotel, operating as a surface steam railroad.", "tier": "secondary", "title": "BMT Brighton Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/BMT_Brighton_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260311045655/https://www.arrts-arrchives.com/brbch1a.html", "kind": "other", "quote": "STEAM TRAIN SERVICE TO BRIGHTON BEACH BEGAN IN JULY 1878 WITH TRAINS TERMINATING AT PROSPECT PARK", "tier": "secondary", "title": "Brighton Beach Line Part 1a — Arrt's Arrchives", "url": "https://arrts-arrchives.com/brbch1a.html" } ] }, { "confidence": "medium", "geometryRef": null, "id": "nyc-bmt-brighton-line-19000709-1", "kind": "extension", "label": { "en": "Through electric service to Park Row, Manhattan via Fulton St El / Brooklyn Bridge begins" }, "notes": "Not a new alignment but a new through-routing: after electrification (trolley wire Fulton & Franklin to Brighton Beach completed 1899) a ramp connected the Brighton Line to the Fulton Street Elevated, enabling through trains over the Brooklyn Bridge to Manhattan.", "opened": "1900-07-09", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260216015127/https://www.nycsubway.org/wiki/BMT_Brighton_Line", "kind": "other", "quote": "When the Fulton St El was electrified, a ramp to the Brighton Line at Fulton & Franklin was built, and through trains to Park Row, Manhattan, via the Brooklyn Bridge began on July 9th, 1900.", "tier": "secondary", "title": "BMT Brighton Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/BMT_Brighton_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260216015127/https://www.nycsubway.org/wiki/BMT_Brighton_Line", "kind": "other", "quote": "Around the same time, the Brighton Line was electrified using trolley wire from Fulton St & Franklin St to Newkirk Avenue, and then to Brighton Beach in 1899.", "tier": "secondary", "title": "BMT Brighton Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/BMT_Brighton_Line" } ] }, { "confidence": "medium", "constructionStart": "1905", "geometryRef": null, "id": "nyc-bmt-brighton-line-1908-2", "kind": "extension", "label": { "en": "Grade-crossing elimination / open-cut reconstruction: Church Avenue → Sheepshead Bay (four-track right of way built, BRT)" }, "notes": "Construction began December 30, 1905 and was completed in 1908. The line was rebuilt onto its present right of way — elevated from the Fulton El connection, then an open cut from north of Prospect Park to Newkirk Avenue, ramping to embankment toward Sheepshead Bay; four tracks between Church Avenue and Sheepshead Bay, with third rail replacing trolley wire north of Sheepshead Bay. No sourced cost figure found. [Date chase 2026-06-12] Construction-start of December 30, 1905 is supported inline by Cudahy, 'The Malbone Street Wreck' (Fordham Univ. Press, 1999) — an offline book cited within Wikipedia — and corroborated by nycsubway.org's 1905-1908 upgrade window. [Opening-date chase 2026-06-13] Individual intermediate stations (Beverley Road, Cortelyou Road, Newkirk Plaza) opened August 23, 1907 during this grade-crossing-elimination reconstruction; full four-track segment Church Ave–Sheepshead Bay completed 1908.", "opened": "1908", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260311070056/https://en.wikipedia.org/wiki/BMT_Brighton_Line", "kind": "wikipedia", "quote": "The work started on December 30, 1905, and was completed in 1908.", "tier": "tertiary", "title": "BMT Brighton Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Brighton_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260216015127/https://www.nycsubway.org/wiki/BMT_Brighton_Line", "kind": "other", "quote": "Between 1905 and 1908, the BRT performed a major upgrade to the Brighton Line, building much of its present right of way.", "tier": "secondary", "title": "BMT Brighton Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/BMT_Brighton_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20230517051444/https://books.google.com/books?id=v5eYL7PTP3cC&pg=PA9", "kind": "other", "publisher": "Fordham University Press", "quote": "Cited in Wikipedia as ref ':2' supporting the statement that work on the Brighton Line grade-crossing elimination started on December 30, 1905.", "tier": "secondary", "title": "The Malbone Street Wreck", "url": "https://books.google.com/books?id=v5eYL7PTP3cC&pg=PA9", "via": "https://en.wikipedia.org/wiki/BMT_Brighton_Line" } ] }, { "confidence": "medium", "geometryRef": "nyc-BMT Brighton Line", "id": "nyc-bmt-brighton-line-19170422-3", "kind": "extension", "label": { "en": "Dual Contracts elevated reconstruction Stage 1: Sheepshead Bay → Ocean Parkway (four-track elevated structure)" }, "notes": "First section of the southern surface line rebuilt as four-track elevated under the Dual Contracts. Construction period c.1917-1920. [Opening-date chase 2026-06-13] At opening, trains ran as a single-track shuttle to Brighton Beach (per the Ocean Parkway station article).", "opened": "1917-04-22", "segment": { "fromStopIndex": 14, "toStopIndex": 16 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260216015127/https://www.nycsubway.org/wiki/BMT_Brighton_Line", "kind": "other", "quote": "The first section, between Sheepshead Bay and Ocean Parkway, opened on April 22, 1917.", "tier": "secondary", "title": "BMT Brighton Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/BMT_Brighton_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260311070056/https://en.wikipedia.org/wiki/BMT_Brighton_Line", "kind": "wikipedia", "quote": "[Ocean Parkway station] April 22, 1917", "tier": "tertiary", "title": "BMT Brighton Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Brighton_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260530085134/https://en.wikipedia.org/wiki/Ocean_Parkway_station", "kind": "other", "publisher": "Wikipedia", "quote": "The Ocean Parkway station opened on April 22, 1917. It was served only by a single-track shuttle that ran to Brighton Beach, which was the southern terminal for all trains on the Brighton Line.", "tier": "tertiary", "title": "Ocean Parkway station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Ocean_Parkway_station", "via": "https://en.wikipedia.org/wiki/BMT_Brighton_Line" } ] }, { "confidence": "medium", "geometryRef": "nyc-BMT Brighton Line", "id": "nyc-bmt-brighton-line-19170530-4", "kind": "extension", "label": { "en": "Dual Contracts elevated reconstruction Stage 2: Ocean Parkway → West 8th Street" }, "notes": "Opening date corrected 1917-05-30→1919-05-19 (revenue service vs ceremonial/structure) [Opening-date chase 2026-06-13 — panel-confirmed, corrected w/ sign-off] [Opening-date chase 2026-06-13] Structure/track likely reached West 8th Street in 1917 (nycsubway.org), but revenue service to the public stop did not begin until 1919: Wikipedia station table and infobox give May 19, 1919; the station article says Brighton service began June 13, 1919. Proposed opening 1919-05-19 (coincident with the broader Stillwell Avenue extension); day-level varies among sources.", "opened": "1919-05-19", "segment": { "fromStopIndex": 16, "toStopIndex": 17 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260216015127/https://www.nycsubway.org/wiki/BMT_Brighton_Line", "kind": "other", "quote": "It was extended to West 8th Street on May 30, 1917, and to the new Stillwell Avenue terminal on May 29, 1919.", "tier": "secondary", "title": "BMT Brighton Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/BMT_Brighton_Line" } ] }, { "confidence": "medium", "geometryRef": null, "id": "nyc-bmt-brighton-line-19190529-5", "kind": "extension", "label": { "en": "Dual Contracts elevated reconstruction Stage 3: West 8th Street → Coney Island–Stillwell Avenue (new terminal)" }, "notes": "Extension to the newly built Coney Island–Stillwell Avenue terminal.", "opened": "1919-05-29", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260216015127/https://www.nycsubway.org/wiki/BMT_Brighton_Line", "kind": "other", "quote": "It was extended to West 8th Street on May 30, 1917, and to the new Stillwell Avenue terminal on May 29, 1919.", "tier": "secondary", "title": "BMT Brighton Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/BMT_Brighton_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260311070056/https://en.wikipedia.org/wiki/BMT_Brighton_Line", "kind": "wikipedia", "quote": "[Coney Island–Stillwell Avenue] May 29, 1919", "tier": "tertiary", "title": "BMT Brighton Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Brighton_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260601184141/https://en.wikipedia.org/wiki/Coney_Island%E2%80%93Stillwell_Avenue_station", "kind": "other", "publisher": "Wikipedia", "quote": "The terminal officially opened on May 29, 1919, when the new Brighton Line opened.", "tier": "tertiary", "title": "Coney Island–Stillwell Avenue station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Coney_Island%E2%80%93Stillwell_Avenue_station", "via": "https://en.wikipedia.org/wiki/BMT_Brighton_Line" } ] }, { "confidence": "medium", "geometryRef": null, "id": "nyc-bmt-brighton-line-19190926-6", "kind": "extension", "label": { "en": "Dual Contracts four-tracking (north end): Church Avenue → Prospect Park increased to four tracks" }, "notes": "Northern end of the line widened from the 1905-08 configuration to four tracks between Church Avenue and Prospect Park. [Opening-date chase 2026-06-13] Precise September 26, 1919 date is single-sourced (nycsubway.org); Wikipedia places the four-tracking within the 1918–1920 window without a specific date.", "opened": "1919-09-26", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260216015127/https://www.nycsubway.org/wiki/BMT_Brighton_Line", "kind": "other", "quote": "At the other end of the line, the section between Church Avenue and Prospect Park was increased to 4 tracks, opening on September 26, 1919.", "tier": "secondary", "title": "BMT Brighton Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/BMT_Brighton_Line" } ] }, { "confidence": "high", "geometryRef": null, "id": "nyc-bmt-brighton-line-19200801-7", "kind": "extension", "label": { "en": "Manhattan connection opens: new subway tunnel under Flatbush Avenue, Prospect Park → DeKalb Avenue (St. Felix Street / Flatbush Avenue Connection to 4th Avenue Subway & Manhattan Bridge)" }, "notes": "Final major addition of the Dual Contracts reconstruction: a new subway tunnel under Flatbush Avenue connected the Brighton Line at Prospect Park with the 4th Avenue Subway at DeKalb Avenue, providing direct service to Manhattan via the Manhattan Bridge and the Broadway subway. [Opening-date chase 2026-06-13] Primary-source corroboration: Brooklyn Daily Eagle, July 25, 1920, headline 'New Subways Add Seven More Miles to BRT on Aug 1' (paywall/403 on direct fetch).", "opened": "1920-08-01", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260311070056/https://en.wikipedia.org/wiki/BMT_Brighton_Line", "kind": "wikipedia", "quote": "The St. Felix Street and Flatbush Avenue Connection opened on August 1, 1920, providing direct service between the Brighton Line and midtown Manhattan.", "tier": "tertiary", "title": "BMT Brighton Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Brighton_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260216015127/https://www.nycsubway.org/wiki/BMT_Brighton_Line", "kind": "other", "quote": "The last major addition was the opening of a new subway tunnel, August 1, 1920, under Flatbush Avenue.", "tier": "secondary", "title": "BMT Brighton Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/BMT_Brighton_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250128184647/https://www.newspapers.com/article/brooklyn-eagle-new-subways-add-seven-mor/157388923/", "kind": "news", "publisher": "Brooklyn Daily Eagle", "quote": "New Subways Add Seven More Miles to BRT on Aug 1 [headline, July 25, 1920 article anticipating the August 1, 1920 opening]", "tier": "primary", "title": "New Subways Add Seven More Miles to BRT on Aug 1 — Brooklyn Daily Eagle, July 25, 1920", "url": "https://www.newspapers.com/article/brooklyn-eagle-new-subways-add-seven-mor/157388923/", "via": "https://en.wikipedia.org/wiki/BMT_Brighton_Line" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260216015127/https://www.nycsubway.org/wiki/BMT_Brighton_Line", "kind": "other", "quote": "The line began service as the Brooklyn, Flatbush, and Coney Island Railroad on July 2, 1878 between Prospect Park and Brighton Beach Hotel, operating as a surface steam railroad.", "tier": "secondary", "title": "BMT Brighton Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/BMT_Brighton_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260311070056/https://en.wikipedia.org/wiki/BMT_Brighton_Line", "kind": "wikipedia", "quote": "The Brighton Line opened from the Willink Plaza entrance of Prospect Park...to Brighton Beach...on July 2, 1878, and the full original line on August 18.", "tier": "tertiary", "title": "BMT Brighton Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Brighton_Line" } ] }, { "cityId": "nyc", "color": "#6D6E71", "displayNumber": "BMT Franklin Avenue Line", "id": "nyc-line-bmt-franklin-avenue-line", "name": { "en": "BMT Franklin Avenue Line" }, "phases": [ { "confidence": "medium", "geometryRef": "nyc-BMT Franklin Avenue Line", "id": "nyc-bmt-franklin-avenue-line-18780819-0", "kind": "initial", "label": { "en": "Initial opening (Brooklyn, Flatbush & Coney Island RR): Bedford/Franklin Ave → Prospect Park (Brighton mainline; Franklin Ave portion)" }, "notes": "[Opening-date chase 2026-06-13] Brooklyn Daily Eagle advance notice (Aug 18, 1878) confirms regular schedule trains began running 6:30 A.M. Monday, August 19, 1878 — independent of Wikipedia, corroborating the Franklin Ave portion opening date (six weeks after the rest of the Brighton Line).", "opened": "1878-08-19", "segment": { "fromStopIndex": 0, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260403003309/https://en.wikipedia.org/wiki/BMT_Franklin_Avenue_Line", "kind": "wikipedia", "quote": "The line opened on July 1, 1878, originally running from the Willink Plaza entrance of Prospect Park at Flatbush Avenue and Ocean Avenue to the Brighton Beach Hotel.", "tier": "tertiary", "title": "BMT Franklin Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Franklin_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260403003309/https://en.wikipedia.org/wiki/BMT_Franklin_Avenue_Line", "kind": "wikipedia", "quote": "This portion formally opened on August 19, 1878, about six weeks after the rest of the Brighton Line opened.", "tier": "tertiary", "title": "BMT Franklin Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Franklin_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251218173316/https://en.wikipedia.org/wiki/Franklin_Avenue_Shuttle", "kind": "wikipedia", "quote": "It was originally a part of the mainline of what is now the BMT Brighton Line and opened as part of that steam railroad line in 1878.", "tier": "tertiary", "title": "Franklin Avenue Shuttle — Wikipedia", "url": "https://en.wikipedia.org/wiki/Franklin_Avenue_Shuttle" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20230405113106/https://nyshistoricnewspapers.org/lccn/sn83031151/1878-08-18/ed-1/seq-1/", "kind": "news", "publisher": "Brooklyn Daily Eagle", "quote": "The Brooklyn, Flatbush and Coney Island Railway Company Commencing at 6:30 A.M., Monday, August 19 ... regular schedule trains will be run from the Long Island Depot ... through to Brighton Beach", "tier": "secondary", "title": "Notice of Opening — Brooklyn Daily Eagle, August 18, 1878", "url": "https://nyshistoricnewspapers.org/lccn/sn83031151/1878-08-18/ed-1/seq-1/", "via": "https://en.wikipedia.org/wiki/BMT_Franklin_Avenue_Line" } ] }, { "confidence": "low", "geometryRef": null, "id": "nyc-bmt-franklin-avenue-line-18960815-1", "kind": "extension", "label": { "en": "Connection to the Fulton Street Elevated opens (ramp + short elevated railway giving through service toward Manhattan via the Brooklyn Bridge)" }, "opened": "1896-08-15", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260403003309/https://en.wikipedia.org/wiki/BMT_Franklin_Avenue_Line", "kind": "wikipedia", "quote": "On August 15, 1896, the railroad gained a connection with it by means of a ramp and short elevated railway.", "tier": "tertiary", "title": "BMT Franklin Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Franklin_Avenue_Line" } ] }, { "confidence": "low", "constructionStart": "1905", "geometryRef": null, "id": "nyc-bmt-franklin-avenue-line-1906-2", "kind": "extension", "label": { "en": "Grade-crossing elimination near Park Place: line elevated (1905–1906) connecting the old elevated structure to the open-cut portion" }, "notes": "[Date chase 2026-06-12] Year support is partial: Wikipedia language ('In 1905 and 1906...') and the 1905 Park Place lowering are consistent with a 1905 start but no independently reachable primary (government/operator) source confirms the exact start year. Underlying refs are Forgotten NY (fan site) and Cudahy (book).", "opened": "1906", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260403003309/https://en.wikipedia.org/wiki/BMT_Franklin_Avenue_Line", "kind": "wikipedia", "quote": "In 1905 and 1906, the last remaining grade crossings were eliminated in the vicinity of Park Place by building an elevated structure to connect the old elevated structure and the open-cut portion.", "tier": "tertiary", "title": "BMT Franklin Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Franklin_Avenue_Line" } ] }, { "confidence": "medium", "geometryRef": null, "id": "nyc-bmt-franklin-avenue-line-19200801-3", "kind": "renumber", "label": { "en": "Line becomes a discrete route: Brighton mainline diverted to Fourth Avenue Subway via Montague St Tunnel; Fulton El connection severed (Franklin Ave Line established Franklin Ave → Prospect Park)" }, "notes": "[Opening-date chase 2026-06-13] Brooklyn Daily Eagle, Aug 1, 1920, p. 53 ('Montague Street Tube, Brighton Subway Operation Begun') independently confirms service began Aug 1, 1920, when the Brighton mainline shifted to the Montague Street Tunnel and the Fulton El connection was severed.", "opened": "1920-08-01", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260403003309/https://en.wikipedia.org/wiki/BMT_Franklin_Avenue_Line", "kind": "wikipedia", "quote": "On August 1, 1920, the Brighton Beach Line was connected to the Broadway subway in Manhattan via the Montague Street Tunnel under the East River, as well as a tunnel connection underneath Flatbush Avenue. At the same time, track connections to the Fulton Street Elevated were severed.", "tier": "tertiary", "title": "BMT Franklin Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Franklin_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251218173316/https://en.wikipedia.org/wiki/Franklin_Avenue_Shuttle", "kind": "wikipedia", "quote": "The Franklin Avenue Line was established as a discrete route on August 1, 1920, when the Brighton Beach mainline was shifted to the new tunnel connecting Prospect Park station with the Fourth Avenue Subway.", "tier": "tertiary", "title": "Franklin Avenue Shuttle — Wikipedia", "url": "https://en.wikipedia.org/wiki/Franklin_Avenue_Shuttle" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260511232434/https://bklyn.newspapers.com/image/56149279/", "kind": "news", "publisher": "Brooklyn Daily Eagle", "quote": "Montague Street Tube, Brighton Subway Operation Begun", "tier": "secondary", "title": "Montague Street Tube, Brighton Subway Operation Begun — Brooklyn Daily Eagle, August 1, 1920, p. 53", "url": "http://bklyn.newspapers.com/image/56149279/", "via": "https://en.wikipedia.org/wiki/BMT_Franklin_Avenue_Line" } ] }, { "closed": "1998-07", "confidence": "medium", "constructionStart": "1998", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "USD", "isEstimate": false, "value": 74000000, "year": 1999 }, "notes": "Cost of the 18-month rehabilitation of the line's supporting infrastructure and stations (July 1998 – October 1999). Price-level year taken as the project completion year 1999. [Citation chase 2026-06-11] Figure corroborated by the MTA press release (Oct 18, 1999) describing \"The $74 million project\" at reopening and by the NYT (2008) reporting the line was \"rebuilt at a cost of $74 million in 1999,\" confirming this as the actual completed-project cost.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251218173316/https://en.wikipedia.org/wiki/Franklin_Avenue_Shuttle", "kind": "wikipedia", "quote": "most of the supporting infrastructure and stations were completely rehabilitated in 18 months, between July 1998 and October 1999 at a cost of $74 million.", "tier": "tertiary", "title": "Franklin Avenue Shuttle — Wikipedia", "url": "https://en.wikipedia.org/wiki/Franklin_Avenue_Shuttle" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251218173316/https://en.wikipedia.org/wiki/Franklin_Avenue_Shuttle", "kind": "wikipedia", "quote": "The line reopened on October 18, 1999, three months ahead of schedule.", "tier": "tertiary", "title": "Franklin Avenue Shuttle — Wikipedia", "url": "https://en.wikipedia.org/wiki/Franklin_Avenue_Shuttle" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20250531214528/https://www.nytimes.com/2008/07/24/nyregion/24shuttle.html", "kind": "news", "publisher": "The New York Times", "quote": "Rebuilt at a cost of $74 million in 1999, the shuttle averages 20,000 riders per day.", "tier": "secondary", "title": "In Brooklyn, It's the Little Train That Can", "url": "https://www.nytimes.com/2008/07/24/nyregion/24shuttle.html", "via": "https://en.wikipedia.org/wiki/Franklin_Avenue_Shuttle" }, { "accessedAt": "2026-06-11", "kind": "primary", "publisher": "Metropolitan Transportation Authority", "quote": "The $74 million project boasts rebuilt stations, new disabled accessible elevators and ramps, tracks, structural bridges, retaining walls, signals, power supplies, communications links and even MetroCard Vending Machines.", "tier": "primary", "title": "New Franklin Avenue Shuttle Makes Early Debut", "url": "https://web.archive.org/web/20160729142557/http://www.mta.info/press-release/mta-headquarters/new-franklin-avenue-shuttle-makes-early-debut", "via": "https://en.wikipedia.org/wiki/Franklin_Avenue_Shuttle" } ] }, "geometryRef": null, "id": "nyc-bmt-franklin-avenue-line-19991018-4", "kind": "reopening", "label": { "en": "Full rehabilitation: line closed July 1998, reopened Oct 18, 1999 (infrastructure and stations completely rebuilt)" }, "notes": "[Date chase 2026-06-12] constructionStart corrected from 1998 to 1997: physical work began September 1997 per both Wikipedia articles, which cite an MTA press release ('New Franklin Avenue Shuttle Makes Early Debut'). July 1998 was the passenger-service closure date. The underlying MTA press release (archive: https://web.archive.org/web/20160729142557/http://www.mta.info/press-release/mta-headquarters/new-franklin-avenue-shuttle-makes-early-debut) could not be independently fetched in this environment. [Opening-date chase 2026-06-13] MTA press release of Oct 18, 1999 ('New Franklin Avenue Shuttle Makes Early Debut') is a primary source for the reopening date; live URL now returns 403, archived copy at web.archive.org/web/20160729142557/.", "opened": "1999-10-18", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251218173316/https://en.wikipedia.org/wiki/Franklin_Avenue_Shuttle", "kind": "wikipedia", "quote": "most of the supporting infrastructure and stations were completely rehabilitated in 18 months, between July 1998 and October 1999 at a cost of $74 million.", "tier": "tertiary", "title": "Franklin Avenue Shuttle — Wikipedia", "url": "https://en.wikipedia.org/wiki/Franklin_Avenue_Shuttle" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251218173316/https://en.wikipedia.org/wiki/Franklin_Avenue_Shuttle", "kind": "wikipedia", "quote": "The line reopened on October 18, 1999, three months ahead of schedule.", "tier": "tertiary", "title": "Franklin Avenue Shuttle — Wikipedia", "url": "https://en.wikipedia.org/wiki/Franklin_Avenue_Shuttle" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20200629113501/http://www.mta.info/press-release/mta-headquarters/new-franklin-avenue-shuttle-makes-early-debut", "kind": "primary", "publisher": "Metropolitan Transportation Authority", "quote": "New Franklin Avenue Shuttle Makes Early Debut", "tier": "primary", "title": "New Franklin Avenue Shuttle Makes Early Debut — MTA Press Release, October 18, 1999", "url": "https://www.mta.info/press-release/mta-headquarters/new-franklin-avenue-shuttle-makes-early-debut", "via": "https://en.wikipedia.org/wiki/Franklin_Avenue_Shuttle" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260403003309/https://en.wikipedia.org/wiki/BMT_Franklin_Avenue_Line", "kind": "wikipedia", "quote": "The line opened on July 1, 1878, originally running from the Willink Plaza entrance of Prospect Park at Flatbush Avenue and Ocean Avenue to the Brighton Beach Hotel.", "tier": "tertiary", "title": "BMT Franklin Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Franklin_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251218173316/https://en.wikipedia.org/wiki/Franklin_Avenue_Shuttle", "kind": "wikipedia", "quote": "It was originally a part of the mainline of what is now the BMT Brighton Line and opened as part of that steam railroad line in 1878.", "tier": "tertiary", "title": "Franklin Avenue Shuttle — Wikipedia", "url": "https://en.wikipedia.org/wiki/Franklin_Avenue_Shuttle" } ] }, { "cityId": "nyc", "color": "#996633", "displayNumber": "BMT Jamaica Line", "id": "nyc-line-bmt-jamaica-line", "name": { "en": "BMT Jamaica Line" }, "phases": [ { "confidence": "medium", "geometryRef": null, "id": "nyc-bmt-jamaica-line-18850513-0", "kind": "initial", "label": { "en": "Origin: Lexington Avenue Elevated opens through Brooklyn (Gates Avenue and stations later transferred to the Broadway/Jamaica El, e.g. Broadway Junction area)" }, "notes": "The earliest stations now on the Jamaica Line trace to the Union Elevated Railroad's Lexington Avenue Elevated (leased to Brooklyn Elevated Railroad), opened 1885. These were originally part of the Lexington Avenue Line, not the Broadway/Jamaica El proper; they were later folded into the Jamaica Line. Gates Avenue opened May 13, 1885; other 1885 stations opened May-Dec 1885 (Broadway Junction ~June 14, Chauncey St July 18, Halsey St Aug 19, Alabama Ave Sep 5, Van Siclen Ave Dec 3). Station counts not precisely documented as a single 'extension'. [Opening-date chase 2026-06-13] Gates Avenue is cited as the oldest station built as a rapid transit station; these Lexington Avenue El stations were later transferred to the Jamaica Line.", "opened": "1885-05-13", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260611125110/https://en.wikipedia.org/wiki/Gates_Avenue_station_(BMT_Jamaica_Line)", "kind": "wikipedia", "quote": "Gates Avenue was originally opened by the Union Elevated Railroad on May 13, 1885 for the BMT Lexington Avenue Line", "tier": "tertiary", "title": "Gates Avenue station (BMT Jamaica Line) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Gates_Avenue_station_(BMT_Jamaica_Line)" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260217081759/https://www.nycsubway.org/wiki/BMT_Nassau_Street-Jamaica_Line", "kind": "other", "quote": "Stations including Gates Avenue, Halsey Street, Chauncey Street, and Broadway Junction opened between May and September 1885, with Alabama Avenue following on 9/5/1885.", "tier": "secondary", "title": "BMT Nassau Street-Jamaica Line — nycsubway.org", "url": "https://www.nycsubway.org/wiki/BMT_Nassau_Street-Jamaica_Line" } ] }, { "confidence": "low", "geometryRef": "nyc-BMT Jamaica Line", "id": "nyc-bmt-jamaica-line-18880625-1", "kind": "extension", "label": { "en": "Broadway Elevated opens: Gates Avenue → Driggs Avenue (Williamsburg), connecting at Marcy Avenue" }, "notes": "The Union Elevated Railroad (leased to Brooklyn Elevated Railroad) opened the Broadway (Brooklyn) Elevated above Broadway from Gates Avenue northwest to Driggs Avenue in Williamsburg. Marcy Avenue, Broadway Ferry (July 14, 1888) and other Williamsburg-end stations date from this period. This is the segment from which the Jamaica Line proper is descended. Exact added-station count not documented. [Opening-date chase 2026-06-13] A Broadway Ferry extension followed on July 14, 1888, but the core Gates-to-Driggs segment opened June 25, 1888 as curated.", "opened": "1888-06-25", "segment": { "fromStopIndex": 0, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260601044146/https://en.wikipedia.org/wiki/BMT_Jamaica_Line", "kind": "wikipedia", "quote": "The Union Elevated Railroad, leased to the Brooklyn Elevated Railroad, opened an elevated line above Broadway from Gates Avenue northwest to Driggs Avenue in Williamsburg on June 25, 1888.", "tier": "tertiary", "title": "BMT Jamaica Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Jamaica_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260601185905/https://en.wikipedia.org/wiki/Marcy_Avenue_station", "kind": "wikipedia", "quote": "Marcy Avenue station opened on June 25, 1888.", "tier": "tertiary", "title": "Marcy Avenue station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Marcy_Avenue_station" } ] }, { "confidence": "low", "geometryRef": "nyc-BMT Jamaica Line", "id": "nyc-bmt-jamaica-line-18930530-2", "kind": "extension", "label": { "en": "Cypress Hills extension opens: Crescent Street area → Cypress Hills (over Fulton Street and Crescent Street)" }, "notes": "Brooklyn Elevated Railroad extension of the Lexington Avenue/Broadway El east to Cypress Hills over Fulton Street and Crescent Street. Cypress Hills WP describes it as a 'four stop extension' (Cleveland Street, Norwood Avenue, Crescent Street, Cypress Hills). [Opening-date chase 2026-06-13] Cypress Hills station was later rebuilt and reopened May 28, 1917 under the Dual Contracts, but original opening for this phase is May 30, 1893.", "opened": "1893-05-30", "segment": { "fromStopIndex": 6, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260601044146/https://en.wikipedia.org/wiki/BMT_Jamaica_Line", "kind": "wikipedia", "quote": "An extension of the Broadway Elevated east to Cypress Hills, over Fulton Street and Crescent Street, opened on May 30, 1893.", "tier": "tertiary", "title": "BMT Jamaica Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Jamaica_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260516144043/https://en.wikipedia.org/wiki/Cypress_Hills_station", "kind": "wikipedia", "quote": "This station was opened on May 30, 1893 as part of the Brooklyn Elevated Railroad's four stop extension of the Lexington Avenue Line to Cypress Hills.", "tier": "tertiary", "title": "Cypress Hills station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Cypress_Hills_station" } ], "stationCount": 4 }, { "closed": "1916-07-03", "confidence": "low", "geometryRef": null, "id": "nyc-bmt-jamaica-line-19080917-3", "kind": "extension", "label": { "en": "Williamsburg Bridge connection: elevated service rerouted across the bridge into Manhattan (west of Marcy Avenue); Broadway Ferry Branch westernmost stations made obsolete" }, "notes": "A connection to the Williamsburg Bridge was established in 1908; trains were rerouted across the bridge west of Marcy Avenue, into the new Essex Street terminal (Centre Street Loop / later Nassau Street Line, opened Sep 16, 1908). Marcy Avenue WP cites a NYT article dated Sep 17, 1908 ('Mayor Runs a Train Over New Bridge') for the start of service. The two westernmost Broadway Ferry Branch stations (Driggs Avenue, Broadway Ferry) were rendered obsolete and closed July 3, 1916. 'closed' here records that 1916 branch closure, not a closure of the bridge connection itself. [Opening-date chase 2026-06-13] Better-evidenced day is September 16, 1908 (revenue service start); the curated September 17 is likely the NYT publication date of the next-day report. Year unchanged.", "opened": "1908-09-17", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260601044146/https://en.wikipedia.org/wiki/BMT_Jamaica_Line", "kind": "wikipedia", "quote": "A connection to the Williamsburg Bridge was established in 1908, rendering the two westernmost stations on the Broadway Ferry Branch obsolete.", "tier": "tertiary", "title": "BMT Jamaica Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Jamaica_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260601185905/https://en.wikipedia.org/wiki/Marcy_Avenue_station", "kind": "wikipedia", "quote": "Upon the opening of the Williamsburg Bridge tracks in 1908, trains were rerouted across the bridge west of Marcy Avenue.", "tier": "tertiary", "title": "Marcy Avenue station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Marcy_Avenue_station" } ] }, { "confidence": "low", "geometryRef": "nyc-BMT Jamaica Line", "id": "nyc-bmt-jamaica-line-19170528-4", "kind": "extension", "label": { "en": "Jamaica Avenue extension (part 1): three stations open on Jamaica Avenue (Woodhaven Boulevard, 85th Street–Forest Parkway, 75th Street–Elderts Lane)" }, "notes": "[Opening-date chase 2026-06-13] BMT Jamaica Line article indicates five stations opened this date (also 111th Street and 104th Street), not the three named in the label. No ceremonial-vs-revenue ambiguity; NYT pre-announced the revenue opening.", "opened": "1917-05-28", "segment": { "fromStopIndex": 15, "toStopIndex": 18 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260601044146/https://en.wikipedia.org/wiki/BMT_Jamaica_Line", "kind": "wikipedia", "quote": "Three stations opened on Jamaica Avenue: Woodhaven Boulevard, 85th Street–Forest Parkway, and 75th Street–Elderts Lane. (\"May 28, 1917\")", "tier": "tertiary", "title": "BMT Jamaica Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Jamaica_Line" } ], "stationCount": 3 }, { "confidence": "low", "geometryRef": "nyc-BMT Jamaica Line", "id": "nyc-bmt-jamaica-line-19180703-5", "kind": "extension", "label": { "en": "Jamaica Avenue extension (part 2): extension east to 168th Street in Jamaica completed" }, "notes": "Extension to 168th Street completed with five stations added (121st Street, 111th Street, 104th Street, Queens Boulevard, Metropolitan Avenue per the line article's listing). 168th Street became the eastern terminal until the 1977 cutback. [Opening-date chase 2026-06-13] Backed by contemporary newspaper sources and the official Public Service Commission annual report; no ceremonial-vs-revenue ambiguity.", "opened": "1918-07-03", "segment": { "fromStopIndex": 18, "toStopIndex": 21 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260601044146/https://en.wikipedia.org/wiki/BMT_Jamaica_Line", "kind": "wikipedia", "quote": "The eastern extension along Jamaica Avenue to 168th Street was opened on July 3, 1918.", "tier": "tertiary", "title": "BMT Jamaica Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Jamaica_Line" } ], "stationCount": 5 }, { "closed": "1977-09-10", "confidence": "low", "geometryRef": null, "id": "nyc-bmt-jamaica-line-19770910-6", "kind": "renumber", "label": { "en": "Eastern cutback: Jamaica El cut back from 168th Street to Queens Boulevard; three easternmost stations closed (168th Street, 160th Street, Sutphin Boulevard)" }, "notes": "Service truncation/closure phase (no new stations). The three easternmost elevated stations closed September 10, 1977; the El was cut back to Queens Boulevard. Demolition of the elevated structure began June 1978. This was a precursor to the eventual replacement by the Archer Avenue subway (a separate line, opened 1988). [Opening-date chase 2026-06-13] This is a closure/cutback event, not a new opening; the 'opened' date marks resumption of service to the new eastern terminus (Queens Boulevard). Mayor Beame requested the accelerated cutback to expedite Downtown Jamaica redevelopment.", "opened": "1977-09-10", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260601044146/https://en.wikipedia.org/wiki/BMT_Jamaica_Line", "kind": "wikipedia", "quote": "the three easternmost stations (Sutphin Boulevard, 160th Street, and 168th Street) were closed on September 10, 1977", "tier": "tertiary", "title": "BMT Jamaica Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Jamaica_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260516144124/https://en.wikipedia.org/wiki/BMT_Archer_Avenue_Line", "kind": "wikipedia", "quote": "On September 10, 1977, the Jamaica elevated was cut back from 168th Street to Queens Boulevard station, closing the stations at 168th Street, 160th Street, and Sutphin Boulevard.", "tier": "tertiary", "title": "Archer Avenue lines — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Archer_Avenue_Line" } ], "stationCount": 0 }, { "closed": "1985-04-15", "confidence": "low", "geometryRef": null, "id": "nyc-bmt-jamaica-line-19850415-7", "kind": "renumber", "label": { "en": "Eastern cutback to 121st Street: Queens Boulevard and Metropolitan Avenue stations closed (new eastern terminal becomes 121st Street)" }, "notes": "Further truncation ahead of the Archer Avenue subway connection. Queens Boulevard and Metropolitan Avenue (BMT Jamaica Line) closed April 15, 1985, leaving 121st Street as the eastern El terminal. The Jamaica Line proper was thereafter connected to the new BMT Archer Avenue Line (a separate line, opened December 11, 1988, construction started October 23, 1973, final cost ~$465 million / cited elsewhere as $440M federal grant). [Opening-date chase 2026-06-13] Closure/cutback event; the 'opened' date marks resumption of service to the new westerly terminus (121st Street). The Q49 bus was created to replace the eastern section.", "opened": "1985-04-15", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260601044146/https://en.wikipedia.org/wiki/BMT_Jamaica_Line", "kind": "wikipedia", "quote": "Queens Boulevard ... Closed April 15, 1985 ... Metropolitan Avenue ... Closed April 15, 1985", "tier": "tertiary", "title": "BMT Jamaica Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Jamaica_Line" } ], "stationCount": 0 } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260601044146/https://en.wikipedia.org/wiki/BMT_Jamaica_Line", "kind": "wikipedia", "quote": "The Union Elevated Railroad, leased to the Brooklyn Elevated Railroad, opened an elevated line above Broadway from Gates Avenue northwest to Driggs Avenue in Williamsburg on June 25, 1888.", "tier": "tertiary", "title": "BMT Jamaica Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Jamaica_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260601185905/https://en.wikipedia.org/wiki/Marcy_Avenue_station", "kind": "wikipedia", "quote": "Marcy Avenue station opened on June 25, 1888.", "tier": "tertiary", "title": "Marcy Avenue station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Marcy_Avenue_station" } ] }, { "cityId": "nyc", "color": "#FF6319", "displayNumber": "BMT Myrtle Avenue Line", "id": "nyc-line-bmt-myrtle-avenue-line", "name": { "en": "BMT Myrtle Avenue Line" }, "phases": [ { "confidence": "medium", "geometryRef": null, "id": "nyc-bmt-myrtle-avenue-line-18880410-0", "kind": "initial", "label": { "en": "Initial section opens: Johnson & Adams Streets → Grand Avenue junction (Union Elevated Railroad)" }, "opened": "1888-04-10", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260102161143/https://en.wikipedia.org/wiki/BMT_Myrtle_Avenue_Line", "kind": "wikipedia", "quote": "It opened on April 10, 1888, by the Union Elevated Railroad Company. The first section of the line ran over Myrtle Avenue from Johnson and Adams Streets", "tier": "tertiary", "title": "BMT Myrtle Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Myrtle_Avenue_Line" } ] }, { "confidence": "medium", "geometryRef": null, "id": "nyc-bmt-myrtle-avenue-line-18880901-1", "kind": "extension", "label": { "en": "Westward extension opens: along Adams Street and Sands Street to Washington Street (Brooklyn Bridge terminal)" }, "opened": "1888-09-01", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260102161143/https://en.wikipedia.org/wiki/BMT_Myrtle_Avenue_Line", "kind": "wikipedia", "quote": "On September 1, 1888, the line was extended westward along Adams Street and Sands Street", "tier": "tertiary", "title": "BMT Myrtle Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Myrtle_Avenue_Line" } ] }, { "confidence": "medium", "geometryRef": null, "id": "nyc-bmt-myrtle-avenue-line-18890427-2", "kind": "extension", "label": { "en": "Eastward extension opens: along Myrtle Avenue to Broadway" }, "opened": "1889-04-27", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260102161143/https://en.wikipedia.org/wiki/BMT_Myrtle_Avenue_Line", "kind": "wikipedia", "quote": "On April 27, 1889, the line was extended east along Myrtle Avenue to Broadway", "tier": "tertiary", "title": "BMT Myrtle Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Myrtle_Avenue_Line" } ] }, { "confidence": "medium", "geometryRef": "nyc-BMT Myrtle Avenue Line", "id": "nyc-bmt-myrtle-avenue-line-18890720-3", "kind": "extension", "label": { "en": "Eastward extension opens: Broadway → Wyckoff Avenue (Brooklyn/Queens border)" }, "notes": "[Opening-date chase 2026-06-13] Knickerbocker Avenue station within this segment did not open July 20, 1889; per Wikipedia it opened August 15, 1889 (same year, minor intra-segment infill).", "opened": "1889-07-20", "segment": { "fromStopIndex": 0, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260102161143/https://en.wikipedia.org/wiki/BMT_Myrtle_Avenue_Line", "kind": "wikipedia", "quote": "to Wyckoff Avenue (at the Brooklyn/Queens border) on July 20, 1889", "tier": "tertiary", "title": "BMT Myrtle Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Myrtle_Avenue_Line" } ] }, { "confidence": "medium", "geometryRef": null, "id": "nyc-bmt-myrtle-avenue-line-1896-4", "kind": "extension", "label": { "en": "West end extended north along Adams Street to elevated station over Sands Street and High Street" }, "opened": "1896", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260102161143/https://en.wikipedia.org/wiki/BMT_Myrtle_Avenue_Line", "kind": "wikipedia", "quote": "The west end of the line was extended north along Adams Street to an elevated station over Sands Street and High Street in 1896", "tier": "tertiary", "title": "BMT Myrtle Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Myrtle_Avenue_Line" } ] }, { "confidence": "medium", "geometryRef": null, "id": "nyc-bmt-myrtle-avenue-line-18980618-5", "kind": "extension", "label": { "en": "Connection to Brooklyn Bridge tracks opens (private right-of-way between Concord Street and Cathedral Place)" }, "opened": "1898-06-18", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260102161143/https://en.wikipedia.org/wiki/BMT_Myrtle_Avenue_Line", "kind": "wikipedia", "quote": "The connection to the Brooklyn Bridge tracks opened on June 18, 1898", "tier": "tertiary", "title": "BMT Myrtle Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Myrtle_Avenue_Line" } ] }, { "confidence": "medium", "geometryRef": "nyc-BMT Myrtle Avenue Line", "id": "nyc-bmt-myrtle-avenue-line-1906-6", "kind": "extension", "label": { "en": "Eastern end connected via ramp to Lutheran Cemetery Line (former steam dummy line to Metropolitan Avenue)" }, "notes": "[Opening-date chase 2026-06-13] Wikipedia's station table gives a precise date of October 1, 1906 for the Lutheran Cemetery Line ramp connection (Metropolitan Avenue station), refining the wikitext's year-only 'In 1906'.", "opened": "1906", "segment": { "fromStopIndex": 3, "toStopIndex": 7 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260102161143/https://en.wikipedia.org/wiki/BMT_Myrtle_Avenue_Line", "kind": "wikipedia", "quote": "In 1906 the eastern end of the el was connected via a ramp to the Lutheran Cemetery Line, a former steam dummy line to Metropolitan Avenue that had opened on September 3, 1881", "tier": "tertiary", "title": "BMT Myrtle Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Myrtle_Avenue_Line" } ] }, { "confidence": "medium", "constructionStart": "1913", "geometryRef": null, "id": "nyc-bmt-myrtle-avenue-line-19140729-7", "kind": "extension", "label": { "en": "Connection to Broadway–Brooklyn Line opens (enabling Williamsburg Bridge routing)" }, "notes": "[Date chase 2026-06-12] Construction start (Aug 1913) is supported only by Wikipedia's own statement; its cited primary source (Documents of the Senate of NY, 1916) is paywalled on Google Books and remains unverified.", "opened": "1914-07-29", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260102161143/https://en.wikipedia.org/wiki/BMT_Myrtle_Avenue_Line", "kind": "wikipedia", "quote": "On July 29, 1914, the connection to the Broadway-Brooklyn Line was opened ... Construction on this connection began in August 1913.", "tier": "tertiary", "title": "BMT Myrtle Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Myrtle_Avenue_Line" } ] }, { "confidence": "medium", "geometryRef": null, "id": "nyc-bmt-myrtle-avenue-line-19150222-8", "kind": "extension", "label": { "en": "Metropolitan Avenue (former Lutheran Cemetery Line) section rebuilt as elevated under the Dual Contracts" }, "opened": "1915-02-22", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260102161143/https://en.wikipedia.org/wiki/BMT_Myrtle_Avenue_Line", "kind": "wikipedia", "quote": "This section was elevated as part of the Dual Contracts on February 22, 1915", "tier": "tertiary", "title": "BMT Myrtle Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Myrtle_Avenue_Line" } ] }, { "closed": "1944-03-05", "confidence": "medium", "geometryRef": null, "id": "nyc-bmt-myrtle-avenue-line-19440305-9", "kind": "reopening", "label": { "en": "Line west of Bridge–Jay Streets closed (end of elevated service over the Brooklyn Bridge)" }, "notes": "[Opening-date chase 2026-06-13] This phase is a closure/abandonment event (line west of Bridge-Jay Streets closed with the end of Brooklyn Bridge elevated service), coded as an 'opened' date in the DB.", "opened": "1944-03-05", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260102161143/https://en.wikipedia.org/wiki/BMT_Myrtle_Avenue_Line", "kind": "wikipedia", "quote": "On March 5, 1944, the line west of Bridge–Jay Streets was closed coincident with the end of elevated service over the Brooklyn Bridge", "tier": "tertiary", "title": "BMT Myrtle Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Myrtle_Avenue_Line" } ] }, { "closed": "1969-10-04", "confidence": "medium", "geometryRef": null, "id": "nyc-bmt-myrtle-avenue-line-19691004-10", "kind": "reopening", "label": { "en": "Remaining western el closed and demolished: Broadway → Jay Street (end of MJ service)" }, "notes": "[Opening-date chase 2026-06-13] This phase is a closure/demolition event (Broadway to Jay Street, ending MJ service), coded as an 'opened' date in the DB.", "opened": "1969-10-04", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260102161143/https://en.wikipedia.org/wiki/BMT_Myrtle_Avenue_Line", "kind": "wikipedia", "quote": "The rest of the line from Broadway to Jay Street closed on October 4, 1969, and was demolished soon afterward", "tier": "tertiary", "title": "BMT Myrtle Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Myrtle_Avenue_Line" } ] }, { "closed": "2017-07-01", "confidence": "medium", "geometryRef": null, "id": "nyc-bmt-myrtle-avenue-line-20180430-11", "kind": "reopening", "label": { "en": "Metropolitan Avenue – Myrtle/Wyckoff Avenues segment reopens after Myrtle Viaduct & Fresh Pond Bridge reconstruction (M service restored)" }, "notes": "[Opening-date chase 2026-06-13] This phase is a reopening (M service restored) after the 2017-2018 Myrtle Viaduct / Fresh Pond Bridge reconstruction and service suspension.", "opened": "2018-04-30", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260102161143/https://en.wikipedia.org/wiki/BMT_Myrtle_Avenue_Line", "kind": "wikipedia", "quote": "In July 2017, the Metropolitan Transportation Authority started rebuilding two parts of the Myrtle Avenue Line, the 310-foot-long (94 m) approaches to the junction with the BMT Jamaica Line (which lasted until April 2018, requiring suspension of service between Wyckoff and Myrtle Avenues)", "tier": "tertiary", "title": "BMT Myrtle Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Myrtle_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260613163904/https://qns.com/2018/05/mta-reinstates-service-on-m-train-in-ridgewood/", "kind": "news", "quote": "Regular service resumed on April 30, 2018.", "tier": "secondary", "title": "MTA reinstates service on M train in Ridgewood — QNS", "url": "https://qns.com/story/2018/05/03/mta-reinstates-service-on-m-train-in-ridgewood/" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260102161143/https://en.wikipedia.org/wiki/BMT_Myrtle_Avenue_Line", "kind": "wikipedia", "quote": "It opened on April 10, 1888, by the Union Elevated Railroad Company. The first section of the line ran over Myrtle Avenue from Johnson and Adams Streets", "tier": "tertiary", "title": "BMT Myrtle Avenue Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Myrtle_Avenue_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260613163904/https://qns.com/2018/05/mta-reinstates-service-on-m-train-in-ridgewood/", "kind": "news", "quote": "Regular service resumed on April 30, 2018.", "tier": "secondary", "title": "MTA reinstates service on M train in Ridgewood — QNS", "url": "https://qns.com/story/2018/05/03/mta-reinstates-service-on-m-train-in-ridgewood/" } ] }, { "cityId": "nyc", "color": "#A7A9AC", "displayNumber": "BMT Canarsie Line", "id": "nyc-line-bmt-canarsie-line", "name": { "en": "BMT Canarsie Line" }, "phases": [ { "confidence": "medium", "geometryRef": "nyc-BMT Canarsie Line", "id": "nyc-bmt-canarsie-line-18651021-0", "kind": "initial", "label": { "en": "Steam railroad opens: Brooklyn & Rockaway Beach Railroad, East New York (LIRR) → Canarsie Landing" }, "notes": "Predecessor steam-dummy railroad (chartered 24 Dec 1863), not yet rapid transit; later became the southern (surface/elevated) portion of the Canarsie rapid-transit line. Included here as the line's construction origin. [Opening-date chase 2026-06-13] Steam dummy railroad opening; no ceremonial vs. revenue distinction found in sources.", "opened": "1865-10-21", "segment": { "fromStopIndex": 17, "toStopIndex": 23 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260607204739/https://en.wikipedia.org/wiki/BMT_Canarsie_Line", "kind": "wikipedia", "quote": "the Brooklyn and Rockaway Beach Railroad opened from the Long Island Rail Road in East New York to Canarsie Landing... The charter was issued December 24, 1863.", "tier": "tertiary", "title": "BMT Canarsie Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Canarsie_Line" }, { "accessedAt": "2026-06-13", "kind": "other", "publisher": "Fordham Univ Press (Cudahy, Brian J., 2002)", "quote": "canarsie trolley. [p. 101: opened October 21, 1865]", "tier": "secondary", "title": "How We Got to Coney Island: The Development of Mass Transportation in Brooklyn and Kings County", "url": "https://archive.org/details/howwegottoconeyi0000cuda", "via": "https://en.wikipedia.org/wiki/BMT_Canarsie_Line" } ] }, { "confidence": "low", "constructionStart": "1906", "geometryRef": "nyc-BMT Canarsie Line", "id": "nyc-bmt-canarsie-line-19060728-1", "kind": "initial", "label": { "en": "Electrified elevated rapid transit opens: Canarsie Railroad (BRT), Canarsie Landing → Broadway Ferry (Williamsburg)" }, "notes": "Canarsie Railroad chartered 8 May 1906, leased to Brooklyn Union Elevated (BRT); partly elevated and electrified (third rail on the elevated part, trolley wire on the surface section south of New Lots Avenue). This is the line's first rapid-transit service. nycsubway.org gives an erroneous '28 December 1906' for BRT service; the widely-supported date is 28 July 1906. [Date chase 2026-06-12] constructionStart=1906 is inferred from the May 1906 charter/acquisition and the July 1906 electrified opening; no source gives an explicit construction-start date for the original steam-to-electric conversion.", "opened": "1906-07-28", "segment": { "fromStopIndex": 13, "toStopIndex": 17 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260607204739/https://en.wikipedia.org/wiki/BMT_Canarsie_Line", "kind": "wikipedia", "quote": "Service first ran on July 28, 1906, from Canarsie Landing to the Broadway Ferry at the foot of Broadway in Williamsburg", "tier": "tertiary", "title": "BMT Canarsie Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Canarsie_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260607204739/https://en.wikipedia.org/wiki/BMT_Canarsie_Line", "kind": "wikipedia", "quote": "was partly elevated, and electrified with third rail on the elevated part and trolley wire on the rest, south of New Lots Avenue.", "tier": "tertiary", "title": "BMT Canarsie Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Canarsie_Line" } ] }, { "confidence": "high", "geometryRef": "nyc-BMT Canarsie Line", "id": "nyc-bmt-canarsie-line-19240630-2", "kind": "extension", "label": { "en": "Subway opens: 14th Street–Eastern Line, Sixth Avenue (Manhattan) → Montrose Avenue (Brooklyn)" }, "notes": "Initial subway section of the Dual Contracts 14th Street–Eastern District (Eastern) Line, running under 14th Street, the East River, and through Williamsburg. Nine stations: Sixth Avenue, Union Square, Third Avenue, First Avenue (Manhattan); Bedford Avenue, Lorimer Street, Graham Avenue, Grand Street, Montrose Avenue (Brooklyn). Initial service: three-car trains every 7.5 minutes. nycsubway.org's '21 September 1924' appears to be an error; en.wikipedia and the Sixth Avenue station article both give 30 June 1924. [Opening-date chase 2026-06-13] June 30, 1924 was the revenue-service opening, not merely ceremonial: the line collected 9,196 fares on its first day of operation.", "opened": "1924-06-30", "segment": { "fromStopIndex": 1, "toStopIndex": 9 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260607204739/https://en.wikipedia.org/wiki/BMT_Canarsie_Line", "kind": "wikipedia", "quote": "On June 30, 1924, the section between Sixth Avenue in Manhattan and Montrose Avenue in Brooklyn opened.", "tier": "tertiary", "title": "BMT Canarsie Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Canarsie_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260311170042/https://en.wikipedia.org/wiki/Sixth_Avenue_station_(BMT_Canarsie_Line)", "kind": "wikipedia", "quote": "The Canarsie Line's Sixth Avenue station opened on June 30, 1924, as the terminal of the 14th Street–Eastern Line, which ran from Sixth Avenue under the East River and through Williamsburg to Montrose and Bushwick Avenues.", "tier": "tertiary", "title": "14th Street/Sixth Avenue station (BMT Canarsie Line) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Sixth_Avenue_station_(BMT_Canarsie_Line)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251024122053/https://www.nytimes.com/1924/07/01/archives/celebrate-opening-of-subway-link-civic-and-city-officials-ride-in.html", "kind": "news", "publisher": "The New York Times", "quote": "[Dated July 1, 1924, reporting on the June 30, 1924 opening; civic and city officials rode in the inaugural ceremony]", "tier": "secondary", "title": "Celebrate Opening of Subway Link", "url": "https://www.nytimes.com/1924/07/01/archives/celebrate-opening-of-subway-link-civic-and-city-officials-ride-in.html", "via": "https://en.wikipedia.org/wiki/BMT_Canarsie_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20210611180447/https://www.newspapers.com/clip/79371552/whole-city-to-celebrate-e-d-subway/", "kind": "news", "publisher": "Times Union", "quote": "[Dated June 29, 1924: advance announcement that line opens the next day, June 30; initial service provided by three-car trains every seven and a half minutes]", "tier": "secondary", "title": "Whole City to Celebrate E. D. Subway Opening Tomorrow", "url": "https://www.newspapers.com/clip/79371552/whole-city-to-celebrate-e-d-subway/", "via": "https://en.wikipedia.org/wiki/BMT_Canarsie_Line" } ], "stationCount": 9 }, { "confidence": "high", "geometryRef": "nyc-BMT Canarsie Line", "id": "nyc-bmt-canarsie-line-19280714-3", "kind": "extension", "label": { "en": "Subway extended & connected to the Canarsie elevated: Montrose Avenue → Broadway Junction (through service to Canarsie/Rockaway Parkway begins)" }, "notes": "Extended east under Wyckoff Avenue then south paralleling the Bay Ridge Branch to a new Broadway Junction station, where it connected to the existing (1906) Canarsie elevated, enabling through service to Rockaway Parkway. New subway stations: Morgan Avenue, Jefferson Street, DeKalb Avenue, Myrtle–Wyckoff Avenues, Halsey Street, Wilson Avenue, Bushwick Avenue–Aberdeen Street, Broadway Junction. nycsubway.org's '14 December 1928' conflicts; en.wikipedia and the Broadway Junction station article give 14 July 1928 (the widely-supported date). The Halsey Street–Cooper Street construction contract was ~$1.345M (Jan 1926). [Opening-date chase 2026-06-13] July 14 carried an official inaugural run before public service, but the service date is the same day (July 14); no gap between ceremonial and revenue service found.", "opened": "1928-07-14", "segment": { "fromStopIndex": 9, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260607204739/https://en.wikipedia.org/wiki/BMT_Canarsie_Line", "kind": "wikipedia", "quote": "On July 14, 1928, the line was extended further east beneath Wyckoff Avenue and then south paralleling the Bay Ridge Branch to a new station at Broadway Junction, above the existing station on the Broadway Elevated (Jamaica Line). At this time, it was connected to the Canarsie Line.", "tier": "tertiary", "title": "BMT Canarsie Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Canarsie_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260511031424/https://en.wikipedia.org/wiki/Broadway_Junction_station", "kind": "wikipedia", "quote": "This station opened on July 14, 1928, as the final section of the 14th Street–Eastern District Line, now part of the Canarsie Line, opened between Montrose Avenue and Broadway Junction.", "tier": "tertiary", "title": "Broadway Junction station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Broadway_Junction_station" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260511031425/https://www.newspapers.com/image/59894184/?terms=subway+opening", "kind": "news", "publisher": "Brooklyn Daily Eagle", "quote": "[Dated July 14, 1928: headline states the line opens 'Today'; first train this afternoon will carry officials and citizens to celebrate]", "tier": "secondary", "title": "Last Link of New 14th St-E.D. Subway To Be Opened Today: First Train This Afternoon Will Carry Officials – Citizens to Celebrate", "url": "https://www.newspapers.com/image/59894184/?terms=subway+opening", "via": "https://en.wikipedia.org/wiki/BMT_Canarsie_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251105084504/https://www.nytimes.com/1928/07/15/archives/celebrate-opening-of-new-b-m-t-line-officials-and-civic-association.html", "kind": "news", "publisher": "The New York Times", "quote": "[Dated July 15, 1928 — next-day coverage of the July 14 opening; officials and civic association members on first train]", "tier": "secondary", "title": "CELEBRATE OPENING OF NEW B. M. T. LINE; Officials and Civic Association Members Fill First Train From Union Square", "url": "https://www.nytimes.com/1928/07/15/archives/celebrate-opening-of-new-b-m-t-line-officials-and-civic-association.html", "via": "https://en.wikipedia.org/wiki/BMT_Canarsie_Line" } ], "stationCount": 8 }, { "confidence": "high", "constructionStart": "1928", "cost": { "basis": "budget", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": false, "value": 3150000, "year": 1928 }, "notes": "Construction contract for the Eighth Avenue station, awarded September 1928 to D.C. Serber, valued at $3.15 million; the contractor went bankrupt (Oct 1930) and a receiver completed the work. Covers this single-station two-block extension only. [Citation chase 2026-06-11] This is the awarded contract amount (a low bid of $3,160,000 was reduced to the $3,150,000 award); because the contractor (D.C. Serber) went bankrupt in Oct 1930 and a receiver completed the work, the actual final outturn cost is not independently documented. The underlying primary newspaper sources (Brooklyn Citizen, NYT 1930) were paywall/bot-blocked and could not be directly verified.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260607204739/https://en.wikipedia.org/wiki/BMT_Canarsie_Line", "kind": "wikipedia", "quote": "At noon on May 30, 1931, a two-block extension to Eighth Avenue in Manhattan was opened, allowing passengers to transfer to the new IND Eighth Avenue Line.", "tier": "tertiary", "title": "BMT Canarsie Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Canarsie_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251006002920/https://en.wikipedia.org/wiki/Eighth_Avenue_station_(BMT_Canarsie_Line)", "kind": "wikipedia", "quote": "The Eighth Avenue station of the Canarsie Line opened on May 30, 1931, and was the last station to open on the line.", "tier": "tertiary", "title": "14th Street/Eighth Avenue station (BMT Canarsie Line) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Eighth_Avenue_station_(BMT_Canarsie_Line)" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20241210071506/https://www.nytimes.com/1928/07/25/archives/subway-bids-submitted-lowest-offer-for-14th-steastern-extension-is.html", "kind": "news", "publisher": "The New York Times", "tier": "tertiary", "title": "Subway Bids Submitted; Lowest Offer for 14th St.-Eastern Extension is $3,160,000.", "url": "https://www.nytimes.com/1928/07/25/archives/subway-bids-submitted-lowest-offer-for-14th-steastern-extension-is.html", "via": "https://en.wikipedia.org/wiki/Eighth_Avenue_station_(BMT_Canarsie_Line)" } ] }, "geometryRef": "nyc-BMT Canarsie Line", "id": "nyc-bmt-canarsie-line-19310530-4", "kind": "extension", "label": { "en": "Subway extended west: Sixth Avenue → Eighth Avenue (14th Street) — final station, transfer to IND Eighth Avenue Line" }, "notes": "Two-block westward extension opened at noon, 30 May 1931, giving the line its present-day route; built to resemble IND Eighth Avenue Line stations for the transfer. Last station to open on the line. nycsubway.org's '13 June 1931' conflicts; en.wikipedia and the Eighth Avenue station article give 30 May 1931 (widely supported). [Date chase 2026-06-12] Eighth Avenue extension contract ($3.15M) awarded by the BOT in September 1928 following Board of Estimate approval in August 1928; excavation confirmed underway by November 1929. [Opening-date chase 2026-06-13] Mayor drove the inaugural train; station opened to revenue service the same day at noon. No ceremonial-vs-public gap.", "opened": "1931-05-30", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260607204739/https://en.wikipedia.org/wiki/BMT_Canarsie_Line", "kind": "wikipedia", "quote": "At noon on May 30, 1931, a two-block extension to Eighth Avenue in Manhattan was opened, allowing passengers to transfer to the new IND Eighth Avenue Line.", "tier": "tertiary", "title": "BMT Canarsie Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Canarsie_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20251006002920/https://en.wikipedia.org/wiki/Eighth_Avenue_station_(BMT_Canarsie_Line)", "kind": "wikipedia", "quote": "The Eighth Avenue station of the Canarsie Line opened on May 30, 1931, and was the last station to open on the line.", "tier": "tertiary", "title": "14th Street/Eighth Avenue station (BMT Canarsie Line) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Eighth_Avenue_station_(BMT_Canarsie_Line)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260527123107/https://en.wikipedia.org/wiki/14th_Street/Eighth_Avenue_station", "kind": "other", "publisher": "Wikipedia", "quote": "The Board of Estimate approved the extension in August 1928, [...] That September, the BOT awarded a $3.15 million contract for the construction of the extension. During the extension's construction, in November 1929, a section of temporary sidewalk collapsed into an excavation for the subway tunnel.", "tier": "secondary", "title": "14th Street/Eighth Avenue station — Wikipedia", "url": "https://en.wikipedia.org/wiki/14th_Street/Eighth_Avenue_station", "via": "https://en.wikipedia.org/wiki/Eighth_Avenue_station_(BMT_Canarsie_Line)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250413040327/https://timesmachine.nytimes.com/timesmachine/1931/05/30/98336745.html", "kind": "news", "publisher": "The New York Times", "quote": "[Dated May 30, 1931, p. 11: Mayor drives inaugural train on the new link — same-day article confirms May 30 opening]", "tier": "secondary", "title": "Mayor Drives Train in New Subway Link", "url": "http://timesmachine.nytimes.com/timesmachine/1931/05/30/98336745.html", "via": "https://en.wikipedia.org/wiki/BMT_Canarsie_Line" } ], "stationCount": 1 }, { "confidence": "medium", "constructionStart": "2003", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "USD", "isEstimate": false, "value": 340000000, "year": 2006 }, "notes": "Communications-based train control (CBTC) project cost $340 million, of which $78 million upgraded track interlockings. Signaling/automation upgrade, not new alignment; full automatic train operation reached in early 2012. Listed as 'renumber' kind because the schema has no 'upgrade' category — this is a signaling modernization, not a route change or new stations. [Citation chase 2026-06-11] The $78M breakdown is contested: the RPA report attributes the $78M to CBTC equipment installation (remaining funds to interlockings, new trainsets, and other improvements), not to interlocking upgrades as stated here; the underlying primary source (a 2010 NY Post article) is a dead, unarchived link. The $340M total is consistent across sources.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260607204739/https://en.wikipedia.org/wiki/BMT_Canarsie_Line", "kind": "wikipedia", "quote": "The project cost $340 million, with $78 million of it used to upgrade track interlockings on the line.", "tier": "tertiary", "title": "BMT Canarsie Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Canarsie_Line" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20241130180208/https://web.archive.org/web/20160304091527/http://library.rpa.org/pdf/RPA-Moving-Forward.pdf", "kind": "other", "publisher": "Regional Plan Association", "quote": "The project cost $340 million, with $78 million to install CBTC equipment and the remaining funds used to upgrade interlockings, purchase new trainsets, and other necessary improvements.", "tier": "secondary", "title": "Moving Forward - Accelerating the Transition to Communications-Based Train Control for New York City's Subways", "url": "https://web.archive.org/web/20160304091527/http://library.rpa.org/pdf/RPA-Moving-Forward.pdf", "via": "https://en.wikipedia.org/wiki/BMT_Canarsie_Line" } ] }, "geometryRef": null, "id": "nyc-bmt-canarsie-line-200601-5", "kind": "renumber", "label": { "en": "CBTC automation installed (signaling modernization, line-wide)" }, "notes": "First U.S. CBTC implementation on a major line; installed in phases 2003–January 2006, system operational ~Feb 2009, full ATO ~early 2012. No new stations or alignment; included for construction-history completeness. [Date chase 2026-06-12] CBTC planning ran 1999–2002; physical installation in pieces 2003 to January 2006, elevated section south of Broadway Junction completed first. [Opening-date chase 2026-06-13] 2006-01 is the CBTC hardware installation-completion date and matches the phase label. Operationally, automated train operation did not go live until February 2009 (Railway Age, Feb 24, 2009), with full ATO by early 2012 — if the phase is reinterpreted as 'automation went live for passengers,' 2009 would be the better date.", "opened": "2006-01", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260607204739/https://en.wikipedia.org/wiki/BMT_Canarsie_Line", "kind": "wikipedia", "quote": "The project cost $340 million, with $78 million of it used to upgrade track interlockings on the line.", "tier": "tertiary", "title": "BMT Canarsie Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Canarsie_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20170520202647/http://www.railwayage.com:80/index.php/communications/mta-l-line-trains-go-to-full-cbtc.html", "kind": "other", "publisher": "Railway Age", "quote": "[Dated February 24, 2009: article confirming L Line trains go to full CBTC operation — article archived, original URL dead]", "tier": "secondary", "title": "MTA L Line trains go to full CBTC", "url": "http://www.railwayage.com/index.php/communications/mta-l-line-trains-go-to-full-cbtc.html", "via": "https://en.wikipedia.org/wiki/BMT_Canarsie_Line" } ] }, { "closed": "2019-04-27", "confidence": "high", "constructionStart": "2019", "cost": { "basis": "budget", "confidence": "high", "nominal": { "currency": "USD", "isEstimate": false, "value": 926000000, "year": 2018 }, "notes": "Project budget of $926 million as of July 2018 (full reconstruction program). A separate figure: the Canarsie Tunnel rehabilitation construction contract was projected at ~$477 million; the line article cites a renovation range of '$800 million to $1 billion'. The $926M budget is the most specific official program figure. [Citation chase 2026-06-11] The $926M figure is confirmed by the MTA Capital Program Oversight Committee report (July 23, 2018), which states \"The new budget is $926M (Includes contingency and risk reserves)\" — an authorized program budget covering tunnel reconstruction plus station improvements at 1st Ave and Bedford Ave, not just the construction contract.", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260609055540/https://en.wikipedia.org/wiki/14th_Street_Tunnel_shutdown", "kind": "wikipedia", "quote": "the shutdown would not be a full-time closure, but a night and weekend closure.", "tier": "tertiary", "title": "14th Street Tunnel shutdown — Wikipedia", "url": "https://en.wikipedia.org/wiki/14th_Street_Tunnel_shutdown" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260609055540/https://en.wikipedia.org/wiki/14th_Street_Tunnel_shutdown", "kind": "wikipedia", "quote": "as of July 2018, the project budget includes $926 million.", "tier": "tertiary", "title": "14th Street Tunnel shutdown — Wikipedia", "url": "https://en.wikipedia.org/wiki/14th_Street_Tunnel_shutdown" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260607204739/https://en.wikipedia.org/wiki/BMT_Canarsie_Line", "kind": "wikipedia", "quote": "renovation costs between $800 million and $1 billion", "tier": "tertiary", "title": "BMT Canarsie Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Canarsie_Line" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20230315051903/http://web.mta.info/mta/news/books/pdf/180723_1400_CPOC.pdf", "kind": "primary", "publisher": "Metropolitan Transportation Authority", "quote": "Recently approved Plan Revision added $12M to the project budget for additional station improvements at 1st Ave. and Bedford Ave. stations. The new budget is $926M.", "tier": "primary", "title": "Capital Program Oversight Committee Meeting, July 23, 2018", "url": "http://web.mta.info/mta/news/books/pdf/180723_1400_CPOC.pdf", "via": "https://en.wikipedia.org/wiki/14th_Street_Tunnel_shutdown" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20250716062043/https://www.nytimes.com/2016/05/05/nyregion/shutdown-or-less-service-mta-weighs-2-options-for-l-train-project.html", "kind": "news", "publisher": "The New York Times", "quote": "The Canarsie tunnel work could cost $800 million to $1 billion, with the federal government covering much of the project, Mr. Prendergast said.", "tier": "secondary", "title": "Shutdown or Less Service? M.T.A. Weighs 2 Options for L Train Project", "url": "https://www.nytimes.com/2016/05/05/nyregion/shutdown-or-less-service-mta-weighs-2-options-for-l-train-project.html", "via": "https://en.wikipedia.org/wiki/BMT_Canarsie_Line" } ] }, "geometryRef": null, "id": "nyc-bmt-canarsie-line-20200426-6", "kind": "reopening", "label": { "en": "14th Street (Canarsie) Tunnel reconstruction — partial closure (Bedford Av → First Av) for Hurricane Sandy repairs, then reopening" }, "notes": "Rehabilitation of the East River tube damaged by Hurricane Sandy (2012). Originally planned as a full ~15-month shutdown; on 3 Jan 2019 Gov. Cuomo changed it to nights-and-weekends partial closures between Bedford Avenue (Brooklyn) and First/Third Avenue (Manhattan). Service reductions ran 27 Apr 2019 – 26 Apr 2020 (full service restored 27 Apr 2020). Cost figures conflict across sources — $477M contract vs $926M program budget vs $800M–$1B estimate — noted in cost.notes. [Date chase 2026-06-12] First construction work (shaft excavation at First Avenue / Bedford Avenue) began July 2017; the April 2019 date marks the start of the night-and-weekend partial-closure repair phase, not first ground disturbance. DNAinfo (Avenue A entrance work, July 2017) is a dead link; an archived copy is cited in Wikipedia. [Opening-date chase 2026-06-13] 2020-04-26 is the tunnel-rehabilitation completion / end-of-partial-closure date; full pre-shutdown service levels were not restored immediately because COVID-19 had the MTA running an essential-service plan.", "opened": "2020-04-26", "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260609055540/https://en.wikipedia.org/wiki/14th_Street_Tunnel_shutdown", "kind": "wikipedia", "quote": "the shutdown would not be a full-time closure, but a night and weekend closure.", "tier": "tertiary", "title": "14th Street Tunnel shutdown — Wikipedia", "url": "https://en.wikipedia.org/wiki/14th_Street_Tunnel_shutdown" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260609055540/https://en.wikipedia.org/wiki/14th_Street_Tunnel_shutdown", "kind": "wikipedia", "quote": "as of July 2018, the project budget includes $926 million.", "tier": "tertiary", "title": "14th Street Tunnel shutdown — Wikipedia", "url": "https://en.wikipedia.org/wiki/14th_Street_Tunnel_shutdown" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260607204739/https://en.wikipedia.org/wiki/BMT_Canarsie_Line", "kind": "wikipedia", "quote": "renovation costs between $800 million and $1 billion", "tier": "tertiary", "title": "BMT Canarsie Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Canarsie_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260613163926/https://www.dnainfo.com/new-york/20171030/midtown/rain-central-park-weather-wind-advisory-nws/", "kind": "news", "publisher": "DNAinfo New York", "quote": "Work on a new subway entrance for L train passengers at Avenue A and 14th Street is now underway, according to signage posted by the MTA at the intersection.", "tier": "secondary", "title": "MTA Begins Work on New L Train Entrance at Avenue A as Bus Stops Relocate", "url": "https://www.dnainfo.com/new-york/20170711/east-village/l-train-new-entrance-avenue-a", "via": "https://en.wikipedia.org/wiki/14th_Street_Tunnel_shutdown" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20210822105330/https://www.governor.ny.gov/news/governor-cuomo-announces-completion-nation-leading-l-project-tunnel-rehabilitation-no-shutdown", "kind": "primary", "publisher": "New York State — Office of Governor Andrew M. Cuomo", "quote": "[Press release dated April 26, 2020: announces completion of the L Project tunnel rehabilitation — archived at web.archive.org/web/20200427110938/]", "tier": "primary", "title": "Governor Cuomo Announces Completion of Nation-leading L Project Tunnel Rehabilitation With No Shutdown", "url": "https://www.governor.ny.gov/news/governor-cuomo-announces-completion-nation-leading-l-project-tunnel-rehabilitation-no-shutdown", "via": "https://en.wikipedia.org/wiki/14th_Street_Tunnel_shutdown" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613163921/https://www.nydailynews.com/2020/04/26/mta-has-finished-repair-work-on-hurricane-sandy-damaged-l-train-tunnel/", "kind": "news", "publisher": "New York Daily News", "quote": "[Dated April 26, 2020: confirms MTA finished repair work on Hurricane Sandy-damaged L train tunnel]", "tier": "secondary", "title": "MTA has finished repair work on Hurricane Sandy-damaged L train tunnel", "url": "https://www.nydailynews.com/new-york/ny-mta-l-train-tunnel-construction-20200426-hgo7ook6ufa75p3pjnwux63yoa-story.html", "via": "https://en.wikipedia.org/wiki/14th_Street_Tunnel_shutdown" } ] } ], "sources": [ { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260607204739/https://en.wikipedia.org/wiki/BMT_Canarsie_Line", "kind": "wikipedia", "quote": "the Brooklyn and Rockaway Beach Railroad opened from the Long Island Rail Road in East New York to Canarsie Landing... The charter was issued December 24, 1863.", "tier": "tertiary", "title": "BMT Canarsie Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/BMT_Canarsie_Line" }, { "accessedAt": "2026-06-09", "archivedUrl": "https://web.archive.org/web/20260609055540/https://en.wikipedia.org/wiki/14th_Street_Tunnel_shutdown", "kind": "wikipedia", "quote": "the shutdown would not be a full-time closure, but a night and weekend closure.", "tier": "tertiary", "title": "14th Street Tunnel shutdown — Wikipedia", "url": "https://en.wikipedia.org/wiki/14th_Street_Tunnel_shutdown" } ] } ], "name": { "en": "New York City" } }, { "bbox": [ 10.5, 59.84, 10.93, 59.99 ], "center": [ 10.74, 59.92 ], "country": "Norway", "defaultZoom": 11, "homeCurrency": "NOK", "id": "oslo", "lines": [ { "cityId": "oslo", "color": "#0073db", "displayNumber": "1", "id": "oslo-line-1", "name": { "en": "Line 1 (Frognerseteren ↔ Bergkrystallen)", "no": "Linje 1 — Holmenkollbanen / Lambertseterbanen" }, "phases": [ { "confidence": "medium", "constructionStart": "1896", "geometryRef": "oslo-1", "id": "oslo-1-holmenkollbanen-1898", "kind": "initial", "label": { "en": "Holmenkollbanen opens: Majorstuen → Holmenkollen (extended to Frognerseteren 1916)" }, "notes": "Opened as a private suburban electric tramway (Holmenkollbanen / forstadsbane), Majorstuen–Besserud, later upgraded to metro standard. No sourced construction cost exists; the prior 600k NOK (1890) figure was unverifiable and premetro, so no cost is recorded. [Date chase 2026-06-12] 1896 corresponds to the founding of the operating company A/S Holmenkolbanen (17 Feb 1896), which was established to build the line; no source directly states a 1896 construction-start year.", "opened": "1898-05-31", "segment": { "fromStopIndex": 16, "toStopIndex": 34 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20251017064357/https://en.wikipedia.org/wiki/Holmenkollen_Line", "kind": "wikipedia", "quote": "The line was opened on 31 May 1898 as a tram line between Majorstuen and Besserud.", "tier": "secondary", "title": "Holmenkollen Line - Wikipedia", "url": "https://en.wikipedia.org/wiki/Holmenkollen_Line" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251112112128/https://no.wikipedia.org/wiki/Holmenkollbanen", "kind": "wikipedia", "title": "Holmenkollbanen — Wikipedia (no) (Majorstuen–Holmenkollen 1898; Frognerseteren 1916)", "url": "https://no.wikipedia.org/wiki/Holmenkollbanen" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20251112164534/https://en.wikipedia.org/wiki/Holmenkolbanen", "kind": "other", "publisher": "Wikipedia (en)", "quote": "The company was founded on 17 February 1896 by H. M. Heyerdahl and Albert Fenger Krog as the leading executives. The goal was to build a light rail suburban tramway — the Holmenkoll Line — from the Holmenkollen neighborhood in northwestern Oslo to the end of the street tramway at Majorstuen. The line opened first to Besserud (at the time called Holmenkolen) on 31 May 1898.", "tier": "secondary", "title": "A/S Holmenkolbanen — Wikipedia", "url": "https://en.wikipedia.org/wiki/Holmenkolbanen", "via": "https://en.wikipedia.org/wiki/Holmenkollen_Line" } ], "stationCount": 18 }, { "confidence": "medium", "constructionStart": "1912", "cost": { "basis": "outturn", "confidence": "low", "nominal": { "currency": "NOK", "isEstimate": true, "value": 14000000, "year": 1928 }, "notes": "Norway's (and the Nordics') first underground railway, opened by King Haakon VII on 27 Jun 1928. Final construction cost ≈14 million kroner (Oslo city archive) against a 1912 single-track estimate of just 2.3 million; the NOK 11.5M figure in English Wikipedia is a financing/loan figure, not the build cost. Construction began 1912, was halted 1914 by litigation, and resumed 1926. Not independently re-verified in the 2026 research pass; retained from prior curation at low confidence. [Citation chase 2026-06-11] The ≈14M kr figure is the actual outturn (money spent at completion in 1928), not an estimate — the Byarkiv source states \"Da tunnelen sto ferdig var det brukt nesten 14 millioner kroner på den.\" It rests on a single, uncited city-archive blog post (no underlying ledger/council-minutes citation), so confidence remains low.", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20240725070218/https://blogg.oslobyarkiv.no/blog/2017/03/15/undergrunnen-mellom-majorstua-og-nationalteateret/", "kind": "primary", "title": "Undergrunnen mellom Majorstua og Nationalteateret — Oslo Byarkiv (≈14M kr)", "url": "https://blogg.oslobyarkiv.no/blog/2017/03/15/undergrunnen-mellom-majorstua-og-nationalteateret/" } ] }, "geometryRef": "oslo-1", "id": "oslo-1-fellestunnelen-vest-1928", "kind": "extension", "label": { "en": "First underground railway: Majorstuen → Nationaltheatret" }, "notes": "[Date chase 2026-06-12] Initial construction (started 1912) halted in October 1914 after about thirty properties were damaged; a settlement was reached in 1925 and construction resumed in 1926, with the western section opening 28 June 1928. [Opening-date chase 2026-06-13] Ceremonial opening by King Haakon VII was 27 June 1928; first day of regular revenue service was 28 June 1928 (Common Tunnel infobox and A/S Holmenkolbanen, both citing Nilsen 1998 p.97).", "opened": "1928-06-27", "segment": { "fromStopIndex": 15, "toStopIndex": 16 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251112102036/https://en.wikipedia.org/wiki/Common_Tunnel", "kind": "wikipedia", "title": "Common Tunnel — Wikipedia (western section opened 1928)", "url": "https://en.wikipedia.org/wiki/Common_Tunnel" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20251112164534/https://en.wikipedia.org/wiki/Holmenkolbanen", "kind": "other", "publisher": "Wikipedia (en)", "quote": "Construction started in 1912, but had to stop in October 1914 after about thirty properties had received massive damage from the construction; some even had to be razed. A settlement was not reached until 1925, and construction started again in 1926, with the line opening on 28 June 1928.", "tier": "secondary", "title": "A/S Holmenkolbanen — Wikipedia", "url": "https://en.wikipedia.org/wiki/Holmenkolbanen", "via": "https://en.wikipedia.org/wiki/Common_Tunnel" } ], "stationCount": 1 }, { "confidence": "low", "constructionStart": "1963", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "NOK", "isEstimate": true, "value": 20100000, "year": 1957 }, "notes": "First line of the purpose-built eastern T-bane, opened 22 May 1966. Built first as a metro-standard tramway (Høyenhall–Bergkrystallen, 1957) for ≈20.1M kroner; the 1963–65 metro conversion (new stations) added a further ≈11M kroner excluding third rail. Denomination years are not stated by the sources; figures are nominal at the time. The 20.1M NOK is the 1957 Lambertseter light-rail construction; the 1966 metro-standard upgrade was a separate ~11M NOK (excl. third rail). Cost contested → confirmed by the verification tiebreaker. [Citation chase 2026-06-11] The 20.1M NOK figure is a retrospective actual construction cost (outturn), sourced to a single offline book (Haldsrud, \"Banen og byen\", 2013, p. 52) quoted verbatim on English Wikipedia; no independent online corroboration is available and the linked Sporveien anniversary brochure is a dead link with no Wayback snapshot.", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260116101049/https://en.wikipedia.org/wiki/Lambertseter_Line", "kind": "wikipedia", "title": "Lambertseter Line — Wikipedia (20.1M tramway; 11M metro conversion)", "url": "https://en.wikipedia.org/wiki/Lambertseter_Line" } ] }, "geometryRef": "oslo-1", "id": "oslo-1-lambertseterbanen-1966", "kind": "extension", "label": { "en": "Lambertseterbanen — first eastern metro: Brynseng → Bergkrystallen" }, "notes": "[Date chase 2026-06-12] Construction of the new metro stations commenced October 1963 (curated date); broader conversion-to-metro infrastructure work began September 1962 per the same Wikipedia article.", "opened": "1966-05-22", "segment": { "fromStopIndex": 0, "toStopIndex": 8 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260116101049/https://en.wikipedia.org/wiki/Lambertseter_Line", "kind": "wikipedia", "quote": "The last trams operated during the night between 17 and 18 May 1966. ... opened as the first part of the Oslo Metro on 22 May 1966 ... Building the new stations commenced in October 1963 and were completed by the end of 1965, with upgrade costs of 11 million kroner, excluding third rail.", "tier": "secondary", "title": "Lambertseter Line - Wikipedia", "url": "https://en.wikipedia.org/wiki/Lambertseter_Line" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251119025449/https://no.wikipedia.org/wiki/Lambertseterbanen", "kind": "wikipedia", "title": "Lambertseterbanen — Wikipedia (no) (opened as T-bane 22 May 1966)", "url": "https://no.wikipedia.org/wiki/Lambertseterbanen" } ], "stationCount": 8 }, { "confidence": "low", "geometryRef": "oslo-1", "id": "oslo-1-fellestunnelen-ost-1966", "kind": "extension", "label": { "en": "Eastern metro tunnel: Brynseng → Grønland → Jernbanetorget" }, "opened": "1966-05-22", "segment": { "fromStopIndex": 8, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260116101049/https://en.wikipedia.org/wiki/Lambertseter_Line", "kind": "wikipedia", "quote": "The last trams operated during the night between 17 and 18 May 1966. ... opened as the first part of the Oslo Metro on 22 May 1966 ... Building the new stations commenced in October 1963 and were completed by the end of 1965, with upgrade costs of 11 million kroner, excluding third rail.", "tier": "secondary", "title": "Lambertseter Line - Wikipedia", "url": "https://en.wikipedia.org/wiki/Lambertseter_Line" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260512160603/https://no.wikipedia.org/wiki/T-banen_i_Oslo", "kind": "wikipedia", "title": "T-banen i Oslo — Wikipedia (no) (eastern lines reached Jernbanetorget 22 May 1966)", "url": "https://no.wikipedia.org/wiki/T-banen_i_Oslo" } ], "stationCount": 5 }, { "confidence": "low", "constructionStart": "1972", "cost": { "confidence": "low", "nominal": { "currency": "NOK", "isEstimate": true, "value": 158000000, "year": 1986 }, "notes": "The connecting tunnel through the new central station closed the last gap between the 1928 western terminus (Nationaltheatret) and the 1966 eastern terminus (Jernbanetorget), allowing through-running (Sognsvann Line through-routed 4 Apr 1993; full western network by 1995). The original build cost of the station + link is not published anywhere accessible; the only hard figure is the ≈158M-kroner bill to repair water-leakage defects (the city sued contractor Selmer in 1986). Used here as an indicative, clearly non-construction proxy. Not independently re-verified in the 2026 research pass; retained from prior curation at low confidence. [Citation chase 2026-06-11] Chase confirmed the 158M NOK is the 1986 repair bill the city sued Selmer for (water-leakage defects at Sentrum/Stortinget), not a construction cost; the sole supporting Wikipedia ref is an offline NTB wire ('Saksøker Selmer', 25 Sep 1986) with no accessible URL, so the underlying primary remains unverifiable.", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251112102036/https://en.wikipedia.org/wiki/Common_Tunnel", "kind": "wikipedia", "title": "Common Tunnel — Wikipedia (Sentrum 1977 → Stortinget 1987; NOK 158M repair; through-running 1993)", "url": "https://en.wikipedia.org/wiki/Common_Tunnel" } ] }, "geometryRef": "oslo-1", "id": "oslo-1-stortinget-1987", "kind": "extension", "label": { "en": "Stortinget opens — eastern & western systems finally joined" }, "notes": "[Date chase 2026-06-12] Station opened as Sentrum on 9 January 1977, closed 1983, then reopened as Stortinget on 7 March 1987, completing the east-west connection. The 1972 construction-start statement is sourced to a 1987 Aftenposten article (offline). [Opening-date chase 2026-06-13] Station first opened as Sentrum on 9 January 1977 (eastern lines only), closed February 1983 due to water leaks, and reopened 7 March 1987 as Stortinget joining the eastern and western systems. Curated 1987-03-07 correctly marks the full through-running opening.", "opened": "1987-03-07", "segment": { "fromStopIndex": 13, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251229154246/https://en.wikipedia.org/wiki/Stortinget_station", "kind": "wikipedia", "title": "Stortinget station — Wikipedia (opened as Sentrum 1977; reopened as Stortinget 7 Mar 1987)", "url": "https://en.wikipedia.org/wiki/Stortinget_station" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260602065606/https://en.wikipedia.org/wiki/Oslo_Metro", "kind": "wikipedia", "tier": "tertiary", "title": "Oslo Metro — Wikipedia", "url": "https://en.wikipedia.org/wiki/Oslo_Metro" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251112164534/https://en.wikipedia.org/wiki/Holmenkolbanen", "kind": "wikipedia", "tier": "tertiary", "title": "Holmenkolbanen — Wikipedia", "url": "https://en.wikipedia.org/wiki/Holmenkolbanen" } ] }, { "cityId": "oslo", "color": "#ec700c", "displayNumber": "2", "id": "oslo-line-2", "name": { "en": "Line 2 (Østerås ↔ Ellingsrudåsen)", "no": "Linje 2 — Røabanen / Furusetbanen" }, "phases": [ { "confidence": "low", "constructionStart": "1911", "geometryRef": "oslo-2", "id": "oslo-2-smestadbanen-1912", "kind": "initial", "label": { "en": "Smestadbanen opens: Majorstuen → Smestad" }, "notes": "[Date chase 2026-06-12] Construction-start year 1911 is implied but not explicitly stated: en.wikipedia Røa Line (citing offline Aspenberg 1995 p.10) gives approval 7 Jul 1911 and completion 7 Nov 1912. No accessible non-Wikipedia source explicitly confirms the 1911 start; DigitaltMuseum primary source returned HTTP 403 and its archived copy lacks a construction-start date. [Opening-date chase 2026-06-13] Norwegian Wikipedia (Røabanen), citing the DigitaltMuseum/Sporveismuseet 'Holmenkollbanen 125 år' primary source, gives the Smestadbanen opening as 17 November 1912 rather than the curated 7 November; year (1912) is unambiguous.", "opened": "1912-11-07", "segment": { "fromStopIndex": 15, "toStopIndex": 17 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251104081318/https://no.wikipedia.org/wiki/R%C3%B8abanen", "kind": "wikipedia", "title": "Røabanen — Wikipedia (no) (Smestadbanen opened 7 Nov 1912)", "url": "https://no.wikipedia.org/wiki/R%C3%B8abanen" } ], "stationCount": 2 }, { "confidence": "low", "geometryRef": "oslo-2", "id": "oslo-2-roabanen-1935", "kind": "extension", "label": { "en": "Røabanen extension: Smestad → Røa" }, "opened": "1935-01-24", "segment": { "fromStopIndex": 17, "toStopIndex": 21 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251104081318/https://no.wikipedia.org/wiki/R%C3%B8abanen", "kind": "wikipedia", "title": "Røabanen — Wikipedia (no) (Røa extension opened 24 Jan 1935)", "url": "https://no.wikipedia.org/wiki/R%C3%B8abanen" } ], "stationCount": 4 }, { "confidence": "low", "geometryRef": "oslo-2", "id": "oslo-2-roabanen-1951", "kind": "extension", "label": { "en": "Røabanen extension: Røa → Lijordet (Grini 1948, Eiksmarka/Lijordet 1951)" }, "opened": "1951-12-03", "segment": { "fromStopIndex": 21, "toStopIndex": 24 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251104081318/https://no.wikipedia.org/wiki/R%C3%B8abanen", "kind": "wikipedia", "title": "Røabanen — Wikipedia (no) (Grini 1948; Eiksmarka/Lijordet 3 Dec 1951)", "url": "https://no.wikipedia.org/wiki/R%C3%B8abanen" } ], "stationCount": 3 }, { "confidence": "low", "geometryRef": "oslo-2", "id": "oslo-2-furusetbanen-1970", "kind": "extension", "label": { "en": "Furusetbanen opens: Hellerud → Haugerud" }, "opened": "1970-11-18", "segment": { "fromStopIndex": 4, "toStopIndex": 7 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260115154545/https://en.wikipedia.org/wiki/Furuset_Line", "kind": "wikipedia", "quote": "The first part of the line, from Hellerud to Haugerud, was opened on 18 November 1970", "tier": "secondary", "title": "Furuset Line — Wikipedia (Hellerud–Haugerud opened 18 Nov 1970)", "url": "https://en.wikipedia.org/wiki/Furuset_Line" } ], "stationCount": 2 }, { "confidence": "low", "geometryRef": "oslo-2", "id": "oslo-2-osterasbanen-1972", "kind": "extension", "label": { "en": "Østeråsbanen extension: Lijordet → Østerås" }, "notes": "[Opening-date chase 2026-06-13] Norwegian Wikipedia gives the Østerås extension as 16 November 1972 vs the curated 15 November; year (1972) is unambiguous.", "opened": "1972-11-15", "segment": { "fromStopIndex": 24, "toStopIndex": 25 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251104081318/https://no.wikipedia.org/wiki/R%C3%B8abanen", "kind": "wikipedia", "title": "Røabanen — Wikipedia (no) (Østerås extension opened Nov 1972)", "url": "https://no.wikipedia.org/wiki/R%C3%B8abanen" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "oslo-2", "id": "oslo-2-furusetbanen-1974", "kind": "extension", "label": { "en": "Furusetbanen extension: Haugerud → Trosterud" }, "opened": "1974-12-15", "segment": { "fromStopIndex": 3, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260115154545/https://en.wikipedia.org/wiki/Furuset_Line", "kind": "wikipedia", "quote": "The line was further extended to Trosterud on 15 December 1974", "tier": "secondary", "title": "Furuset Line — Wikipedia (Haugerud–Trosterud opened 15 Dec 1974)", "url": "https://en.wikipedia.org/wiki/Furuset_Line" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "oslo-2", "id": "oslo-2-furusetbanen-1978", "kind": "extension", "label": { "en": "Furusetbanen extension: Trosterud → Furuset" }, "opened": "1978-02-19", "segment": { "fromStopIndex": 1, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260115154545/https://en.wikipedia.org/wiki/Furuset_Line", "kind": "wikipedia", "quote": "to Furuset on 19 February 1978", "tier": "secondary", "title": "Furuset Line — Wikipedia (Trosterud–Furuset opened 19 Feb 1978)", "url": "https://en.wikipedia.org/wiki/Furuset_Line" } ], "stationCount": 2 }, { "confidence": "low", "cost": { "basis": "outturn", "confidence": "low", "nominal": { "currency": "NOK", "isEstimate": true, "value": 48000000, "year": 1981 }, "notes": "The Furuset → Ellingsrudåsen extension (Ellingsrudåsen is an underground rock-cavern terminus) cost ≈50M kroner at the time; English Wikipedia separately states the whole Furuset Line 'ended at 48 million NOK'. The two figures come from different cited contexts and cannot be reconciled — both are rough nominal values, denomination year unstated. Corrected to NOK 48M per sourced figure (\"the cost…ended at 48 million\"); contested → confirmed by the tiebreaker. [Citation chase 2026-06-11] Source quotes (\"the cost...ended at 48 million\"; \"the line extension cost 50 million...at the time\") indicate an actual final (outturn) cost in nominal 1981 NOK, not an estimate; isEstimate should likely be false. The 48M figure derives from the Furuset Line Wikipedia article (citing Haldsrud 2013, p.148), which should be attached as a source; both 48M and 50M figures trace to offline print sources that cannot be independently verified.", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251226125441/https://en.wikipedia.org/wiki/Ellingsrud%C3%A5sen_station", "kind": "wikipedia", "title": "Ellingsrudåsen station — Wikipedia (opened 8 Nov 1981; ≈50M NOK extension)", "url": "https://en.wikipedia.org/wiki/Ellingsrud%C3%A5sen_station" } ] }, "geometryRef": "oslo-2", "id": "oslo-2-ellingsrudasen-1981", "kind": "extension", "label": { "en": "Furusetbanen extension: Furuset → Ellingsrudåsen" }, "opened": "1981-11-08", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260115154545/https://en.wikipedia.org/wiki/Furuset_Line", "kind": "wikipedia", "quote": "and finally to Ellingsrudåsen on 8 November 1981", "tier": "secondary", "title": "Furuset Line — Wikipedia (Furuset–Ellingsrudåsen opened 8 Nov 1981)", "url": "https://en.wikipedia.org/wiki/Furuset_Line" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "oslo-2", "id": "oslo-2-1966-shared-7", "kind": "extension", "label": { "en": "Shared central section (track opened with line 1)" }, "notes": "Runs over the common central tunnel that opened with line 1 on 1966-05-22; attributed here for map continuity (no separate cost, to avoid double-counting shared infrastructure).", "opened": "1966-05-22", "segment": { "fromStopIndex": 7, "toStopIndex": 12 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260116101049/https://en.wikipedia.org/wiki/Lambertseter_Line", "kind": "wikipedia", "quote": "The last trams operated during the night between 17 and 18 May 1966. ... opened as the first part of the Oslo Metro on 22 May 1966 ... Building the new stations commenced in October 1963 and were completed by the end of 1965, with upgrade costs of 11 million kroner, excluding third rail.", "tier": "secondary", "title": "Lambertseter Line - Wikipedia", "url": "https://en.wikipedia.org/wiki/Lambertseter_Line" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251119025449/https://no.wikipedia.org/wiki/Lambertseterbanen", "kind": "wikipedia", "title": "Lambertseterbanen — Wikipedia (no) (opened as T-bane 22 May 1966)", "url": "https://no.wikipedia.org/wiki/Lambertseterbanen" } ] }, { "confidence": "low", "geometryRef": "oslo-2", "id": "oslo-2-1987-shared-13", "kind": "extension", "label": { "en": "Shared central section (track opened with line 1)" }, "notes": "Runs over the common central tunnel that opened with line 1 on 1987-03-07; attributed here for map continuity (no separate cost, to avoid double-counting shared infrastructure).", "opened": "1987-03-07", "segment": { "fromStopIndex": 12, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251229154246/https://en.wikipedia.org/wiki/Stortinget_station", "kind": "wikipedia", "title": "Stortinget station — Wikipedia (opened as Sentrum 1977; reopened as Stortinget 7 Mar 1987)", "url": "https://en.wikipedia.org/wiki/Stortinget_station" } ] }, { "confidence": "low", "geometryRef": "oslo-2", "id": "oslo-2-1928-shared-14", "kind": "extension", "label": { "en": "Shared central section (track opened with line 1)" }, "notes": "Runs over the common central tunnel that opened with line 1 on 1928-06-27; attributed here for map continuity (no separate cost, to avoid double-counting shared infrastructure). [Opening-date chase 2026-06-13] Day-level conflict for the 1928 western tunnel opening: body text (Nilsen 1998) gives 27 June, while two infoboxes give 28 June; year and month are not in dispute.", "opened": "1928-06-27", "segment": { "fromStopIndex": 14, "toStopIndex": 14 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251112102036/https://en.wikipedia.org/wiki/Common_Tunnel", "kind": "wikipedia", "title": "Common Tunnel — Wikipedia (western section opened 1928)", "url": "https://en.wikipedia.org/wiki/Common_Tunnel" } ] } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260611125149/https://en.wikipedia.org/wiki/Roabanen", "kind": "wikipedia", "tier": "tertiary", "title": "Røa Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Roabanen" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260115154545/https://en.wikipedia.org/wiki/Furuset_Line", "kind": "wikipedia", "tier": "tertiary", "title": "Furuset Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Furuset_Line" } ] }, { "cityId": "oslo", "color": "#a85fa5", "displayNumber": "3", "id": "oslo-line-3", "name": { "en": "Line 3 (Kolsås ↔ Mortensrud)", "no": "Linje 3 — Kolsåsbanen / Østensjøbanen" }, "phases": [ { "confidence": "low", "geometryRef": "oslo-3", "id": "oslo-3-kolsasbanen-1924", "kind": "initial", "label": { "en": "Kolsåsbanen opens: Majorstuen → Bekkestua" }, "opened": "1924-07-01", "segment": { "fromStopIndex": 17, "toStopIndex": 25 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260104004149/https://en.wikipedia.org/wiki/Kols%C3%A5s_Line", "kind": "wikipedia", "quote": "The line to Bekkestua opened on 1 July 1924 and the extension to Haslum on 4 November.", "tier": "secondary", "title": "Kolsås Line - Wikipedia", "url": "https://en.wikipedia.org/wiki/Kols%C3%A5s_Line" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251115003929/https://no.wikipedia.org/wiki/Kols%C3%A5sbanen", "kind": "wikipedia", "title": "Kolsåsbanen — Wikipedia (no) (opened to Bekkestua 1 Jul 1924)", "url": "https://no.wikipedia.org/wiki/Kols%C3%A5sbanen" } ], "stationCount": 8 }, { "confidence": "low", "geometryRef": "oslo-3", "id": "oslo-3-kolsasbanen-1930", "kind": "extension", "label": { "en": "Kolsåsbanen extension: Bekkestua → Kolsås" }, "opened": "1930-01-01", "segment": { "fromStopIndex": 25, "toStopIndex": 32 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260104004149/https://en.wikipedia.org/wiki/Kols%C3%A5s_Line", "kind": "wikipedia", "quote": "The 4.3-kilometer (2.7 mi) extension opened on 1 January 1930.", "tier": "secondary", "title": "Kolsås Line - Wikipedia", "url": "https://en.wikipedia.org/wiki/Kols%C3%A5s_Line" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251115003929/https://no.wikipedia.org/wiki/Kols%C3%A5sbanen", "kind": "wikipedia", "title": "Kolsåsbanen — Wikipedia (no) (extended to Kolsås 1930)", "url": "https://no.wikipedia.org/wiki/Kols%C3%A5sbanen" } ], "stationCount": 7 }, { "confidence": "low", "constructionStart": "1965", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "NOK", "isEstimate": true, "value": 39000000, "year": 1967 }, "notes": "Originally a 1923–26 suburban tramway, converted to full T-bane standard and opened (as the third eastern metro line) on 26 Nov 1967. English Wikipedia gives the Helsfyr–Skullerud upgrade as ≈39M kroner; denomination year not stated. Total Helsfyr–Skullerud (Østensjøbanen) cost; contested → confirmed by the tiebreaker. [Citation chase 2026-06-11] Source wording (\"the total costs ... ended at 39 million\") indicates an actual final (outturn) cost rather than an estimate; the figure ultimately rests on a single offline Norwegian-language book citation (Haldsrud, Banen og byen, 2013, p.118) that could not be independently verified online.", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260108170315/https://en.wikipedia.org/wiki/%C3%98stensj%C3%B8_Line", "kind": "wikipedia", "title": "Østensjø Line — Wikipedia (Helsfyr–Skullerud ≈39M NOK; metro 1967)", "url": "https://en.wikipedia.org/wiki/%C3%98stensj%C3%B8_Line" } ] }, "geometryRef": "oslo-3", "id": "oslo-3-ostensjobanen-1967", "kind": "extension", "label": { "en": "Østensjøbanen converted to metro: Hellerud → Skullerud" }, "notes": "[Date chase 2026-06-12] Construction-start of 1965 remains unsourced; bracketed by the 31 Jan 1964 section approval and 26 Nov 1967 opening, which are consistent with but do not pin down 1965.", "opened": "1967-11-26", "segment": { "fromStopIndex": 1, "toStopIndex": 9 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260108170315/https://en.wikipedia.org/wiki/%C3%98stensj%C3%B8_Line", "kind": "wikipedia", "quote": "The extension from Bøler to Skullerud opened on 26 November 1967.", "tier": "secondary", "title": "Østensjø Line - Wikipedia", "url": "https://en.wikipedia.org/wiki/%C3%98stensj%C3%B8_Line" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260611125428/https://en.wikipedia.org/wiki/Skullerud_(station)", "kind": "wikipedia", "title": "Skullerud (station) — Wikipedia (opened 26 Nov 1967)", "url": "https://en.wikipedia.org/wiki/Skullerud_(station)" } ], "stationCount": 7 }, { "confidence": "low", "constructionStart": "1995", "cost": { "basis": "budget", "confidence": "high", "nominal": { "currency": "NOK", "isEstimate": true, "value": 250000000, "year": 1998 }, "notes": "Mortensrud extension (taken into use 24 Nov 1997, officially opened 4 Jan 1998): ≈215M kroner for the extension plus ≈35M for Mortensrud station, per the station's Wikipedia article. Summed here to ≈250M; denomination year not stated. Mortensrud extension ≈ NOK 250M (NOK 215M excl. the station). [Citation chase 2026-06-11] Both figures are denominated in 1996 kroner per the Oslo Package 2 primary fact sheets (215M for the Skullerud→Mortensrud extension, id=44; 35M for the Mortensrud terminal/station, id=45) — so the denomination year is 1996, not 1998 (the opening year). The figures are Oslopakke 2 project-database costs (execution 1995–1997/1998), i.e. an authorized/budget basis rather than a settled final outturn.", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251222012904/https://en.wikipedia.org/wiki/Mortensrud_station", "kind": "wikipedia", "title": "Mortensrud station — Wikipedia (215M extension + 35M station; opened 1998)", "url": "https://en.wikipedia.org/wiki/Mortensrud_station" }, { "accessedAt": "2026-06-11", "kind": "primary", "publisher": "Statens vegvesen Oslo / Oslo Package 2 (Oslopakke 2)", "quote": "KOSTNAD: 215 mill kr (1996-kr)", "tier": "primary", "title": "Mortensrud - T-baneforlengelse (Oslo Package 2 fact sheet)", "url": "https://web.archive.org/web/20110725164944/http://www.avinet.no/Oslopakke2/database/faktaark_ny.aspx?id=44", "via": "https://en.wikipedia.org/wiki/Mortensrud_station" }, { "accessedAt": "2026-06-11", "kind": "primary", "publisher": "Statens vegvesen Oslo / Oslo Package 2 (Oslopakke 2)", "quote": "KOSTNAD: 35 mill kr (1996-kr)", "tier": "primary", "title": "Mortensrud - ny terminal (Oslo Package 2 fact sheet)", "url": "https://web.archive.org/web/20110725164954/http://www.avinet.no/Oslopakke2/database/faktaark_ny.aspx?id=45", "via": "https://en.wikipedia.org/wiki/Mortensrud_station" } ] }, "geometryRef": "oslo-3", "id": "oslo-3-mortensrud-1998", "kind": "extension", "label": { "en": "Østensjøbanen extension: Skullerud → Mortensrud" }, "notes": "[Date chase 2026-06-12] Construction was originally planned to start in 1992 (completion 1994) but did not begin until 1995, confirming the curated year. Opening date corrected 1998-01-04→1997-11-24 (revenue service vs ceremonial/structure) [Opening-date chase 2026-06-13 — panel-confirmed, corrected w/ sign-off] [Opening-date chase 2026-06-13] Station taken into revenue service 24 Nov 1997; officially opened (with bus terminal) 4 Jan 1998. Revenue-service date precedes the ceremonial opening by six weeks and falls in the prior year.", "opened": "1997-11-24", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251222012904/https://en.wikipedia.org/wiki/Mortensrud_station", "kind": "wikipedia", "title": "Mortensrud station — Wikipedia (in use 24 Nov 1997, official 4 Jan 1998)", "url": "https://en.wikipedia.org/wiki/Mortensrud_station" } ], "stationCount": 1 }, { "confidence": "high", "constructionStart": "2006", "cost": { "basis": "estimate", "confidence": "high", "nominal": { "currency": "NOK", "isEstimate": true, "value": 2900000000, "year": 2012 }, "notes": "After years of decay the Kolsås Line was closed from 1 Jul 2006 and completely rebuilt to metro standard with 13 new stations, reopening in stages and reaching Kolsås on 12 Oct 2014. Total ≈2.9 billion 2012-kroner (Sporveien / NRK), split into program phases of ≈553M (Oslo section), ≈1,180M and ≈1,255M kroner. This phase carries the cost only — its geometry (the original 1924/1930 alignment) is already drawn by the two phases above, so it is not redrawn. Figure is a 2012 total-cost ESTIMATE for the Kolsåsbanen metro-standard rebuild, not a final accounted cost. [Citation chase 2026-06-11] The 2.9bn figure was the 2012 cost framework; Sporveien confirmed at the 12 Oct 2014 reopening that the project was delivered \"within the cost framework of 2.9 billion kroner\" (~kr 230,000 per linear metre over the 12.1 km Sørbyhaugen–Kolsås stretch), so the 2012 estimate closely matched the outturn.", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260611125454/https://www.mynewsdesk.com/no/sporveien/pressreleases/kolsaasbanen-er-ferdigstilt-og-aapnet-for-trafikk-helt-til-kolsaas-1066989", "kind": "news", "title": "Kolsåsbanen ferdigstilt og åpnet helt til Kolsås — Sporveien (2.9bn kr, 13 stations, 12 Oct 2014)", "url": "https://www.mynewsdesk.com/no/sporveien/pressreleases/kolsaasbanen-er-ferdigstilt-og-aapnet-for-trafikk-helt-til-kolsaas-1066989" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251115003929/https://no.wikipedia.org/wiki/Kols%C3%A5sbanen", "kind": "wikipedia", "title": "Kolsåsbanen — Wikipedia (no) (2,9 milliarder 2012-kroner)", "url": "https://no.wikipedia.org/wiki/Kols%C3%A5sbanen" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20260613164139/https://www.sporveien.no/-innstillinger-/404/", "kind": "primary", "publisher": "Sporveien / Oslo T-banedrift AS", "quote": "Det har kostet 2,9 Mrd kroner, ca kr 230 000 pr.lengdemeter å modernisere Kolsåsbanen til dagens Metrostandard.", "tier": "primary", "title": "Kolsåsbanen gjenåpnes for ordinær drift søndag 12.oktober — Sporveien Oslo AS / tbanen.no (archived 25 Dec 2014)", "url": "https://web.archive.org/web/20141225153018/http://www.tbanen.no/ikbViewer/page/inter/omtbanen/artikkel?p_document_id=2497298", "via": "https://no.wikipedia.org/wiki/Kols%C3%A5sbanen" } ] }, "geometryRef": null, "id": "oslo-3-kolsasbanen-rebuild-2014", "kind": "reopening", "label": { "en": "Kolsåsbanen rebuilt to metro standard (Sørbyhaugen → Kolsås)" }, "notes": "[Date chase 2026-06-12] 2006 reflects the 1 July 2006 line closure that began the upgrade programme; per the no.wiki phased table, physical construction on individual Oslo/Baerum segments began September 2008.", "opened": "2014-10-12", "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260104004149/https://en.wikipedia.org/wiki/Kols%C3%A5s_Line", "kind": "wikipedia", "quote": "The final stage was officially reopened on 12 October 2014.", "tier": "secondary", "title": "Kolsås Line - Wikipedia", "url": "https://en.wikipedia.org/wiki/Kols%C3%A5s_Line" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260611125424/https://www.nrk.no/stor-oslo/kolsasbanen-apnes-igjen-1.11980875", "kind": "news", "title": "Kolsåsbanen åpnes igjen — NRK Stor-Oslo (reopened to Kolsås 12 Oct 2014)", "url": "https://www.nrk.no/stor-oslo/kolsasbanen-apnes-igjen-1.11980875" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260613164029/https://no.wikipedia.org/wiki/Kols%C3%A5sbanen", "kind": "other", "publisher": "Wikipedia (Norwegian)", "quote": "Banen ble da stengt helt fra Husebybakken stasjon som ligger mellom Smestad og Montebello...1. juli 2006. I Oslo startet det videre arbeidet for strekningen fram til nye Bjørnsletta stasjon og videre til bygrensen i september 2008.", "tier": "tertiary", "title": "Kolsåsbanen — Wikipedia (no)", "url": "https://no.wikipedia.org/wiki/Kolsåsbanen", "via": "https://en.wikipedia.org/wiki/Kols%C3%A5s_Line" } ], "stationCount": 13 }, { "confidence": "low", "geometryRef": "oslo-3", "id": "oslo-3-1966-shared-9", "kind": "extension", "label": { "en": "Shared central section (track opened with line 1)" }, "notes": "Runs over the common central tunnel that opened with line 1 on 1966-05-22; attributed here for map continuity (no separate cost, to avoid double-counting shared infrastructure).", "opened": "1966-05-22", "segment": { "fromStopIndex": 9, "toStopIndex": 14 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260116101049/https://en.wikipedia.org/wiki/Lambertseter_Line", "kind": "wikipedia", "quote": "The last trams operated during the night between 17 and 18 May 1966. ... opened as the first part of the Oslo Metro on 22 May 1966 ... Building the new stations commenced in October 1963 and were completed by the end of 1965, with upgrade costs of 11 million kroner, excluding third rail.", "tier": "secondary", "title": "Lambertseter Line - Wikipedia", "url": "https://en.wikipedia.org/wiki/Lambertseter_Line" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251119025449/https://no.wikipedia.org/wiki/Lambertseterbanen", "kind": "wikipedia", "title": "Lambertseterbanen — Wikipedia (no) (opened as T-bane 22 May 1966)", "url": "https://no.wikipedia.org/wiki/Lambertseterbanen" } ] }, { "confidence": "low", "geometryRef": "oslo-3", "id": "oslo-3-1987-shared-15", "kind": "extension", "label": { "en": "Shared central section (track opened with line 1)" }, "notes": "Runs over the common central tunnel that opened with line 1 on 1987-03-07; attributed here for map continuity (no separate cost, to avoid double-counting shared infrastructure).", "opened": "1987-03-07", "segment": { "fromStopIndex": 14, "toStopIndex": 17 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251229154246/https://en.wikipedia.org/wiki/Stortinget_station", "kind": "wikipedia", "title": "Stortinget station — Wikipedia (opened as Sentrum 1977; reopened as Stortinget 7 Mar 1987)", "url": "https://en.wikipedia.org/wiki/Stortinget_station" } ] }, { "confidence": "low", "geometryRef": "oslo-3", "id": "oslo-3-1928-shared-16", "kind": "extension", "label": { "en": "Shared central section (track opened with line 1)" }, "notes": "Runs over the common central tunnel that opened with line 1 on 1928-06-27; attributed here for map continuity (no separate cost, to avoid double-counting shared infrastructure).", "opened": "1928-06-27", "segment": { "fromStopIndex": 16, "toStopIndex": 16 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251112102036/https://en.wikipedia.org/wiki/Common_Tunnel", "kind": "wikipedia", "title": "Common Tunnel — Wikipedia (western section opened 1928)", "url": "https://en.wikipedia.org/wiki/Common_Tunnel" } ] } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260104004149/https://en.wikipedia.org/wiki/Kols%C3%A5s_Line", "kind": "wikipedia", "tier": "tertiary", "title": "Kolsås Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Kols%C3%A5s_Line" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260108170315/https://en.wikipedia.org/wiki/%C3%98stensj%C3%B8_Line", "kind": "wikipedia", "tier": "tertiary", "title": "Østensjø Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/%C3%98stensj%C3%B8_Line" } ] }, { "cityId": "oslo", "color": "#004a98", "displayNumber": "4", "id": "oslo-line-4", "name": { "en": "Line 4 (Bergkrystallen ↔ Vestli, via Ring & Løren)", "no": "Linje 4 — Sognsvannsbanen / Ringen / Lørenbanen" }, "phases": [ { "confidence": "low", "constructionStart": "1932", "geometryRef": "oslo-4", "id": "oslo-4-sognsvannsbanen-1934", "kind": "initial", "label": { "en": "Sognsvannsbanen (inner): Majorstuen → Ullevål stadion" }, "notes": "[Date chase 2026-06-12] Construction-start year is split between sources: Norwegian tertiary sources (Lokalhistoriewiki, Skinnelangs) and no.wp support 1932 (labor dispute resolved 15 Dec 1932), while en.wp citing Aspenberg 1995 (p.17, offline) says work recommenced in 1933. Original works ran Jan 1922 to the 1924 dispute, then resumed 1932/1933; line opened 10 Oct 1934. [Opening-date chase 2026-06-13] A municipal inspection tour (kommunal befaring) was held 22 September 1934; this was not a public revenue-service opening. Public opening was 10 October 1934. The whole line (Majorstuen-Sognsvann) opened at once, not in sub-segments.", "opened": "1934-10-10", "segment": { "fromStopIndex": 16, "toStopIndex": 19 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20251010075759/https://en.wikipedia.org/wiki/Sognsvannsbanen", "kind": "wikipedia", "quote": "Work commenced again in 1933 and the line opened on 10 October 1934.", "tier": "secondary", "title": "Sognsvann Line - Wikipedia", "url": "https://en.wikipedia.org/wiki/Sognsvannsbanen" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260218144418/https://no.wikipedia.org/wiki/Sognsvannsbanen", "kind": "wikipedia", "title": "Sognsvannsbanen — Wikipedia (no) (opened 10 Oct 1934)", "url": "https://no.wikipedia.org/wiki/Sognsvannsbanen" } ], "stationCount": 3 }, { "confidence": "high", "constructionStart": "2000", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "NOK", "isEstimate": false, "value": 590000000, "year": 2003 }, "notes": "Stage 1 of the Ring (Ullevål stadion–Nydalen–Storo), opened 20 Aug 2003, cost ≈590M kroner. The whole ring (to Carl Berners plass, 2006) totalled ≈1,348M kroner, financed largely through Oslo Package 2. Cost of the Ring Line first section. [Citation chase 2026-06-11] Per the Oslo Package 2 fact sheet (id=46), the 590M stage-1 figure is stated in fixed 2000-kroner (Ullevål–Storo), while the full-ring 1,348M total is in 2004-kroner; the price-year base for the 590M value should be 2000, not 2003.", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260205042453/https://en.wikipedia.org/wiki/Ring_Line_(Oslo)", "kind": "wikipedia", "title": "Ring Line (Oslo) — Wikipedia (stage 1 ≈590M kr; total ≈1,348M kr)", "url": "https://en.wikipedia.org/wiki/Ring_Line_(Oslo)" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20210308215418/https://web.archive.org/web/20110501173155/http://www.avinet.no/Oslopakke2/database/faktaark_ny.aspx?id=46", "kind": "primary", "publisher": "Oslo Package 2 / Samferdselsetaten Oslo kommune", "quote": "KOSTNAD: 1,348 mill kr (2004-kr) - Ullevål - Storo: 590 mill (2000-kr)", "tier": "secondary", "title": "T-baneringen — Gjennomførte kollektivtiltak i Oslo og Akershus 1990–2006 (Oslo Package 2 fact sheet, id=46)", "url": "https://web.archive.org/web/20110501173155/http://www.avinet.no/Oslopakke2/database/faktaark_ny.aspx?id=46", "via": "https://en.wikipedia.org/wiki/Ring_Line_(Oslo)" } ] }, "geometryRef": "oslo-4", "id": "oslo-4-ringen-2003", "kind": "extension", "label": { "en": "Ring Line stage 1: Ullevål stadion → Storo (via Nydalen)" }, "notes": "[Date chase 2026-06-12] Store norske leksikon and both-language Wikipedias narrow the construction start to June 2000 for stage 1 (Ullevaal stadion to Storo via Nydalen); curated year 2000 confirmed.", "opened": "2003-08-20", "segment": { "fromStopIndex": 19, "toStopIndex": 21 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260205042453/https://en.wikipedia.org/wiki/Ring_Line_(Oslo)", "kind": "wikipedia", "quote": "The first section opened from Ullevål stadion via Nydalen to Storo on 20 August 2003 ... costing NOK 590 million", "tier": "secondary", "title": "Ring Line (Oslo) — Wikipedia (stage 1 opened 20 Aug 2003)", "url": "https://en.wikipedia.org/wiki/Ring_Line_(Oslo)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20140227070324/http://www.aftenposten.no/nyheter/iriks/article1428274.ece", "kind": "news", "publisher": "Aftenposten Aften", "quote": "[Cited in en.wp as the ref for 'Construction started in June'; print article, page 12, 14 March 2000 — dead link online]", "tier": "secondary", "title": "Oslo kommune og staten er blitt enige T-baneringen på vei — Aftenposten Aften, 14 March 2000 (Einar Haakaas, p.12)", "url": "https://www.aftenposten.no/nyheter/iriks/article1428274.ece", "via": "https://en.wikipedia.org/wiki/Ring_Line_(Oslo)" }, { "accessedAt": "2026-06-13", "kind": "primary", "publisher": "Ruter AS (Oslo/Akershus transit authority)", "quote": "Første etappe av T-baneringen åpnes til Nydalen og Storo 20. august.", "tier": "primary", "title": "Tidslinje — Ruter (archived 2009)", "url": "https://web.archive.org/web/20090220144410/http://ruter.no/Miljo-og-kultur/Tidslinje/", "via": "https://en.wikipedia.org/wiki/Ring_Line_(Oslo)" } ], "stationCount": 2 }, { "confidence": "medium", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "NOK", "isEstimate": true, "value": 758000000, "year": 2006 }, "notes": "Stage 2 (Storo–Sinsen–Carl Berners plass) completed the ring on 20 Aug 2006. No isolated stage-2 figure is published; this ≈758M kroner is the difference between the published whole-ring total (≈1,348M) and the ≈590M stage-1 cost. Treat as a derived estimate. (This phase draws the Storo→Sinsen arc; the short Sinsen→Carl Berners closing link is carried on the Grorud spine.) Second Ring Line section; 590M (2003) + 758M (2006) ≈ NOK 1.348B for the whole Ring Line project, matching the combined figure reported. [Citation chase 2026-06-11] No source publishes an isolated stage-2 cost; the 758M figure is derived by subtraction and the two components are in different price-year bases (whole-ring total 1,348M in 2004-kr, stage-1 590M in 2000-kr), so it is an approximation rather than a true nominal cost. The whole-ring total is independently confirmed by the Oslo Package 2 factsheet (1,348M) and Aftenposten's August 2006 completion report (\"1.4 billion kroner\").", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260205042453/https://en.wikipedia.org/wiki/Ring_Line_(Oslo)", "kind": "wikipedia", "title": "Ring Line (Oslo) — Wikipedia (whole ring ≈1,348M kr; completed 2006)", "url": "https://en.wikipedia.org/wiki/Ring_Line_(Oslo)" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20210308215418/https://web.archive.org/web/20110501173155/http://www.avinet.no/Oslopakke2/database/faktaark_ny.aspx?id=46", "kind": "primary", "publisher": "Oslo Package 2 / Avinet", "quote": "1,348 mill kr (2004-kr) - Ullevål - Storo: 590 mill (2000-kr)", "tier": "primary", "title": "T-baneringen — Faktaark, Oslo Package 2 (Oslopakke 2)", "url": "https://web.archive.org/web/20110501173155/http://www.avinet.no/Oslopakke2/database/faktaark_ny.aspx?id=46", "via": "https://en.wikipedia.org/wiki/Ring_Line_(Oslo)" }, { "accessedAt": "2026-06-11", "kind": "news", "publisher": "Aftenposten", "quote": "Ringen har kostet 1,4 milliarder kroner og ble bygget over seks år.", "tier": "secondary", "title": "Nå er ringen sluttet — Aftenposten, 21 August 2006", "url": "https://web.archive.org/web/20110604025630/http://www.aftenposten.no/nyheter/iriks/article1428274.ece", "via": "https://en.wikipedia.org/wiki/Ring_Line_(Oslo)" } ] }, "geometryRef": "oslo-4", "id": "oslo-4-ringen-2006", "kind": "extension", "label": { "en": "Ring Line completed: Storo → Sinsen (ring closed to Carl Berners plass)" }, "notes": "[Opening-date chase 2026-06-13] Day-level variance between sources: Ruter operator timeline (primary) and English Wikipedia state 20 August 2006; Norwegian Wikipedia states 21 August 2006, likely reflecting the Aftenposten day-after newspaper report. Year is unambiguous.", "opened": "2006-08-20", "segment": { "fromStopIndex": 21, "toStopIndex": 22 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260205042453/https://en.wikipedia.org/wiki/Ring_Line_(Oslo)", "kind": "wikipedia", "quote": "On 20 August 2006, the final section opened, from Storo via Sinsen to Carl Berners plass ... the whole project costing NOK 1,348 million", "tier": "secondary", "title": "Ring Line (Oslo) — Wikipedia (ring completed 20 Aug 2006)", "url": "https://en.wikipedia.org/wiki/Ring_Line_(Oslo)" }, { "accessedAt": "2026-06-13", "kind": "primary", "publisher": "Ruter AS (Oslo/Akershus transit authority)", "quote": "20. august åpnes Sinsen T-banestasjon og strekningen Storo - Sinsen - Carl Berners plass. T-baneringen er sluttet.", "tier": "primary", "title": "Tidslinje — Ruter (archived 2009)", "url": "https://web.archive.org/web/20090220144410/http://ruter.no/Miljo-og-kultur/Tidslinje/", "via": "https://en.wikipedia.org/wiki/Ring_Line_(Oslo)" } ], "stationCount": 1 }, { "confidence": "high", "constructionStart": "2013", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "NOK", "isEstimate": false, "value": 1330000000, "year": 2015 }, "notes": "A 1.6 km mostly-underground connector (one new station, Løren, 27 m deep) linking the Ring Line at Sinsen to the Grorud Line at Økern — Oslo's first new metro station in about a decade. Total ≈1.33 billion kroner including ≈150M for Grorud Line station upgrades, funded via Oslo Package 3; built Jun 2013 → opened 3 Apr 2016. Total Lørenbanen project cost; the workflow independently verified only the NOK 357M (2013) groundworks contract (a component), so retained at medium confidence. [Citation chase 2026-06-11] Confirmed by the project owner Sporveien AS (archived 2023-06-06): \"Totalkostnad: 1330 MNOK\" is for Lørenbanen itself; the ~150 MNOK of Grorudbanen station upgrades is an additional cost on top, not included in the 1.33bn figure.", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251010071126/https://lokalhistoriewiki.no/wiki/L%C3%B8renbanen", "kind": "other", "title": "Lørenbanen — lokalhistoriewiki.no (totalt 1,33 milliarder kroner; Oslopakke 3; 2013–2016)", "url": "https://lokalhistoriewiki.no/wiki/L%C3%B8renbanen" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20260613164326/https://www.sporveien.no/-innstillinger-/404/", "kind": "primary", "publisher": "Sporveien AS via Wayback Machine", "quote": "Totalkostnad: 1330 MNOK (dette er for selve Lørenbanen, prosjektet omfatter i tillegg tiltak på Grorudbanen for ca. 150 MNOK)", "tier": "primary", "title": "Lørenbanen — Sporveien AS (archived 2023-06-06)", "url": "https://web.archive.org/web/20230606120734/https://sporveien.com/inter/prosjekter/prosjekt?p_document_id=2639628", "via": "https://lokalhistoriewiki.no/wiki/L%C3%B8renbanen" } ] }, "geometryRef": "oslo-4", "id": "oslo-4-lorenbanen-2016", "kind": "extension", "label": { "en": "Lørenbanen opens: Sinsen → Løren → Økern" }, "notes": "[Date chase 2026-06-12] Operator-primary source (Sporveien T-banen, archived tbane.no, 31 May 2013) pins the exact construction start at 3 June 2013; corroborated by no.wp and Aftenposten. Curated year 2013 confirmed. [Opening-date chase 2026-06-13] The tbane.no archived source supports the construction start (3 June 2013), not the opening date, so it is not attached as an opening-date source.", "opened": "2016-04-03", "segment": { "fromStopIndex": 22, "toStopIndex": 24 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251113033440/https://en.wikipedia.org/wiki/L%C3%B8ren_Line", "kind": "wikipedia", "quote": "The line opened on 3 April 2016.", "tier": "secondary", "title": "Løren Line — Wikipedia (opened 3 Apr 2016)", "url": "https://en.wikipedia.org/wiki/L%C3%B8ren_Line" }, { "accessedAt": "2026-06-12", "kind": "primary", "publisher": "Sporveien T-banen (tbane.no)", "quote": "Fra 3. juni 2013 vil Sporveien, Skanska Norge AS og Railcom arbeide med å bygge ny Lørenbane.", "tier": "primary", "title": "3.juni starter byggingen av Lørenbanen — tbane.no (Sporveien T-banen), 31 May 2013", "url": "https://web.archive.org/web/20130810004555/http://www.tbane.no/aktuelt/2013/5/31/3juni-starter-byggingen-av-loerenbanen.aspx", "via": "https://no.wikipedia.org/wiki/L%C3%B8renbanen" }, { "accessedAt": "2026-06-12", "kind": "news", "publisher": "Aftenposten", "quote": "[Cited in en.wp for construction commencement in June 2013; print article p.11, 14 May 2013 — no URL provided in Wikipedia ref, offline print source]", "tier": "secondary", "title": "Aftenposten, 14 May 2013, p.11 (Heidi Marie Fikke) — Sporveien inngår kontrakt verdt 357 NOK med Skanska", "url": "https://www.aftenposten.no/nyheter/oslo/article1428274.ece", "via": "https://en.wikipedia.org/wiki/L%C3%B8ren_Line" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260205042453/https://en.wikipedia.org/wiki/Ring_Line_(Oslo)", "kind": "wikipedia", "tier": "tertiary", "title": "Ring Line (Oslo) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Ring_Line_(Oslo)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251113033440/https://en.wikipedia.org/wiki/L%C3%B8ren_Line", "kind": "wikipedia", "tier": "tertiary", "title": "Løren Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/L%C3%B8ren_Line" } ] }, { "cityId": "oslo", "color": "#32aa35", "displayNumber": "5", "id": "oslo-line-5", "name": { "en": "Line 5 (Vestli ↔ Sognsvann, via the Grorud Line)", "no": "Linje 5 — Grorudbanen / Sognsvannsbanen" }, "phases": [ { "confidence": "medium", "constructionStart": "1932", "geometryRef": "oslo-5", "id": "oslo-5-sognsvannsbanen-tail-1934", "kind": "initial", "label": { "en": "Sognsvannsbanen (outer): Ullevål stadion → Sognsvann" }, "notes": "[Date chase 2026-06-12] 1932/1933 ambiguity: NO Wikipedia ties 1932 to a labor-dispute resolution (15 Dec 1932) enabling restart; EN Wikipedia (Aspenberg 1995 p.17) says work commenced again in 1933. Line opened 10 October 1934. Underlying books (Aspenberg 1995, Stang 1980) offline. [Opening-date chase 2026-06-13] The 22 Sept 1934 date in NO Wikipedia was a kommunal befaring (municipal inspection), not the public/revenue opening (10 Oct 1934).", "opened": "1934-10-10", "segment": { "fromStopIndex": 36, "toStopIndex": 42 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20251010075759/https://en.wikipedia.org/wiki/Sognsvannsbanen", "kind": "wikipedia", "quote": "Work commenced again in 1933 and the line opened on 10 October 1934.", "tier": "secondary", "title": "Sognsvann Line - Wikipedia", "url": "https://en.wikipedia.org/wiki/Sognsvannsbanen" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251222123841/https://en.wikipedia.org/wiki/Sognsvann_line", "kind": "wikipedia", "title": "Sognsvann Line — Wikipedia (opened 10 Oct 1934, Majorstuen–Sognsvann)", "url": "https://en.wikipedia.org/wiki/Sognsvann_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20251222123841/https://en.wikipedia.org/wiki/Sognsvann_line", "kind": "other", "publisher": "Wikipedia (EN)", "quote": "Work commenced again in 1933 and the line opened on 10 October 1934.", "tier": "secondary", "title": "Sognsvann line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Sognsvann_line", "via": "https://en.wikipedia.org/wiki/Sognsvann_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260613164238/https://no.wikipedia.org/wiki/Sognsvannsbanen", "kind": "other", "publisher": "Wikipedia (NO)", "quote": "Etter at den tidligere nevnte arbeidskonflikten ble løst den 15. desember 1932, kunne arbeidet igjen begynne, og banen sto ferdig den 10. oktober 1934.", "tier": "secondary", "title": "Sognsvannsbanen — Wikipedia (NO)", "url": "https://no.wikipedia.org/wiki/Sognsvannsbanen", "via": "https://en.wikipedia.org/wiki/Sognsvann_Line" } ], "stationCount": 5 }, { "confidence": "low", "constructionStart": "1956", "cost": { "basis": "estimate", "confidence": "low", "nominal": { "currency": "NOK", "isEstimate": true, "value": 221000000, "year": 1954 }, "notes": "The Grorud Line (Tøyen–Grorud, 12 stations, 9.2 km) opened 16 Oct 1966. No per-extension construction cost is published for any of the eastern lines; the only network-level figure is the City Council's 1954 plan, which estimated ≈221M kroner (1954 prices) for the WHOLE four-line eastern metro INCLUDING rolling stock. It is recorded here once, against the Grorud Line, purely as the era's indicative network investment — it is not a Grorud-only cost. Not independently re-verified in the 2026 research pass; retained from prior curation at low confidence.", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20250826004542/https://en.wikipedia.org/wiki/Grorud_Line", "kind": "wikipedia", "title": "Grorud Line — Wikipedia (1954 network estimate ≈221M NOK incl. rolling stock; opened 16 Oct 1966)", "url": "https://en.wikipedia.org/wiki/Grorud_Line" } ] }, "geometryRef": "oslo-5", "id": "oslo-5-grorudbanen-1966", "kind": "extension", "label": { "en": "Grorudbanen opens: Tøyen → Carl Berners plass → Grorud" }, "notes": "[Date chase 2026-06-12] Construction confirmed to have started February 1956 at Rødtvet; first section Tøyen–Grorud opened 16 October 1966. Underlying books (Strandholt 1994, Haldsrud 2013) offline.", "opened": "1966-10-16", "segment": { "fromStopIndex": 4, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20250826004542/https://en.wikipedia.org/wiki/Grorud_Line", "kind": "wikipedia", "quote": "The first part of the Grorud Line, from Tøyen to Grorud, was opened on 16 October 1966.", "tier": "secondary", "title": "Grorud Line — Wikipedia (Tøyen–Grorud opened 16 Oct 1966)", "url": "https://en.wikipedia.org/wiki/Grorud_Line" } ], "stationCount": 11 }, { "confidence": "low", "geometryRef": "oslo-5", "id": "oslo-5-grorudbanen-1974", "kind": "extension", "label": { "en": "Grorudbanen extension: Grorud → Rommen (via Romsås)" }, "notes": "[Opening-date chase 2026-06-13] Romsås Station was passed through but did not open until the 18 Aug 1974 Rommen–Stovner extension.", "opened": "1974-03-03", "segment": { "fromStopIndex": 2, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20250826004542/https://en.wikipedia.org/wiki/Grorud_Line", "kind": "wikipedia", "quote": "The first extension opened on 3 March 1974 from grorud to Rommen.", "tier": "secondary", "title": "Grorud Line — Wikipedia (Grorud–Rommen 1974; Norwegian WP cites 3 May 1974)", "url": "https://en.wikipedia.org/wiki/Grorud_Line" } ], "stationCount": 2 }, { "confidence": "low", "geometryRef": "oslo-5", "id": "oslo-5-grorudbanen-stovner-1974", "kind": "extension", "label": { "en": "Grorudbanen extension: Rommen → Stovner" }, "notes": "[Opening-date chase 2026-06-13] Romsås Station opened on this same date (18 Aug 1974).", "opened": "1974-08-18", "segment": { "fromStopIndex": 1, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20250826004542/https://en.wikipedia.org/wiki/Grorud_Line", "kind": "wikipedia", "quote": "The second extension took place on 18 August, with the tunnel from Rommen to Stovner.", "tier": "secondary", "title": "Grorud Line — Wikipedia (Rommen–Stovner opened 18 Aug 1974)", "url": "https://en.wikipedia.org/wiki/Grorud_Line" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "oslo-5", "id": "oslo-5-grorudbanen-vestli-1975", "kind": "extension", "label": { "en": "Grorudbanen extension: Stovner → Vestli" }, "opened": "1975-12-21", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20250826004542/https://en.wikipedia.org/wiki/Grorud_Line", "kind": "wikipedia", "quote": "The final opening took place on 21 December 1975 when the tunnel past Stovener was extended to Vestli.", "tier": "secondary", "title": "Grorud Line - Wikipedia", "url": "https://en.wikipedia.org/wiki/Grorud_Line" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260103083715/https://en.wikipedia.org/wiki/Vestli_station", "kind": "wikipedia", "title": "Vestli station — Wikipedia (Stovner–Vestli opened 21 Dec 1975)", "url": "https://en.wikipedia.org/wiki/Vestli_station" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "oslo-5", "id": "oslo-5-1966-shared-16", "kind": "extension", "label": { "en": "Shared track: common eastern tunnel (Grønland–Jernbanetorget) (opened with line 1 on 1966-05-22)" }, "notes": "Line 5 (Ringen) runs over track that opened on 1966-05-22; attributed for map continuity (no separate cost, to avoid double-counting shared infrastructure). [Opening-date chase 2026-06-13] EN Common Tunnel article says 23 May 1966 but is contradicted by the Lambertseter Line article and NO Wikipedia, which both give 22 May 1966.", "opened": "1966-05-22", "segment": { "fromStopIndex": 15, "toStopIndex": 17 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260116101049/https://en.wikipedia.org/wiki/Lambertseter_Line", "kind": "wikipedia", "quote": "The last trams operated during the night between 17 and 18 May 1966. ... opened as the first part of the Oslo Metro on 22 May 1966 ... Building the new stations commenced in October 1963 and were completed by the end of 1965, with upgrade costs of 11 million kroner, excluding third rail.", "tier": "secondary", "title": "Lambertseter Line - Wikipedia", "url": "https://en.wikipedia.org/wiki/Lambertseter_Line" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260512160603/https://no.wikipedia.org/wiki/T-banen_i_Oslo", "kind": "wikipedia", "title": "T-banen i Oslo — Wikipedia (no) (eastern lines reached Jernbanetorget 22 May 1966)", "url": "https://no.wikipedia.org/wiki/T-banen_i_Oslo" } ] }, { "confidence": "low", "geometryRef": "oslo-5", "id": "oslo-5-1987-shared-18", "kind": "extension", "label": { "en": "Shared track: Stortinget infill on the common tunnel (opened with line 1 on 1987-03-07)" }, "notes": "Line 5 (Ringen) runs over track that opened on 1987-03-07; attributed for map continuity (no separate cost, to avoid double-counting shared infrastructure). [Opening-date chase 2026-06-13] Station first opened as 'Sentrum' on 9 Jan 1977, closed Feb 1983, then reopened as Stortinget on 7 Mar 1987 — the relevant through-running reopening.", "opened": "1987-03-07", "segment": { "fromStopIndex": 17, "toStopIndex": 19 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251229154246/https://en.wikipedia.org/wiki/Stortinget_station", "kind": "wikipedia", "title": "Stortinget station — Wikipedia (opened as Sentrum 1977; reopened as Stortinget 7 Mar 1987)", "url": "https://en.wikipedia.org/wiki/Stortinget_station" } ] }, { "confidence": "low", "geometryRef": "oslo-5", "id": "oslo-5-1928-shared-19", "kind": "extension", "label": { "en": "Shared track: central tunnel (Majorstuen–Nationaltheatret) (opened with line 1 on 1928-06-27)" }, "notes": "Line 5 (Ringen) runs over track that opened on 1928-06-27; attributed for map continuity (no separate cost, to avoid double-counting shared infrastructure). [Opening-date chase 2026-06-13] Day/month uncertain: EN Common Tunnel has internal conflict (27 June text vs 28 June infobox); NO Holmenkollen/Nationaltheatret sources give 6 June and 26 June. Year 1928 is solid.", "opened": "1928-06-27", "segment": { "fromStopIndex": 19, "toStopIndex": 20 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251112102036/https://en.wikipedia.org/wiki/Common_Tunnel", "kind": "wikipedia", "title": "Common Tunnel — Wikipedia (western section opened 1928)", "url": "https://en.wikipedia.org/wiki/Common_Tunnel" } ] }, { "confidence": "low", "geometryRef": "oslo-5", "id": "oslo-5-1934-shared-21", "kind": "extension", "label": { "en": "Shared track: Sognsvannsbanen (Majorstuen–Ullevål stadion) (opened with line 4 on 1934-10-10)" }, "notes": "Line 5 (Ringen) runs over track that opened on 1934-10-10; attributed for map continuity (no separate cost, to avoid double-counting shared infrastructure).", "opened": "1934-10-10", "segment": { "fromStopIndex": 20, "toStopIndex": 23 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20251010075759/https://en.wikipedia.org/wiki/Sognsvannsbanen", "kind": "wikipedia", "quote": "Work commenced again in 1933 and the line opened on 10 October 1934.", "tier": "secondary", "title": "Sognsvann Line - Wikipedia", "url": "https://en.wikipedia.org/wiki/Sognsvannsbanen" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260218144418/https://no.wikipedia.org/wiki/Sognsvannsbanen", "kind": "wikipedia", "title": "Sognsvannsbanen — Wikipedia (no) (opened 10 Oct 1934)", "url": "https://no.wikipedia.org/wiki/Sognsvannsbanen" } ] }, { "confidence": "low", "geometryRef": "oslo-5", "id": "oslo-5-2003-shared-24", "kind": "extension", "label": { "en": "Shared track: Ring Line (Ullevål–Storo via Nydalen) (opened with line 4 on 2003-08-20)" }, "notes": "Line 5 (Ringen) runs over track that opened on 2003-08-20; attributed for map continuity (no separate cost, to avoid double-counting shared infrastructure).", "opened": "2003-08-20", "segment": { "fromStopIndex": 23, "toStopIndex": 25 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260205042453/https://en.wikipedia.org/wiki/Ring_Line_(Oslo)", "kind": "wikipedia", "quote": "The first section opened from Ullevål stadion via Nydalen to Storo on 20 August 2003 ... costing NOK 590 million", "tier": "secondary", "title": "Ring Line (Oslo) — Wikipedia (stage 1 opened 20 Aug 2003)", "url": "https://en.wikipedia.org/wiki/Ring_Line_(Oslo)" } ] }, { "confidence": "low", "geometryRef": "oslo-5", "id": "oslo-5-2006-shared-26", "kind": "extension", "label": { "en": "Shared track: Ring Line (Storo–Sinsen–Carl Berners) (opened with line 4 on 2006-08-20)" }, "notes": "Line 5 (Ringen) runs over track that opened on 2006-08-20; attributed for map continuity (no separate cost, to avoid double-counting shared infrastructure).", "opened": "2006-08-20", "segment": { "fromStopIndex": 25, "toStopIndex": 28 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260205042453/https://en.wikipedia.org/wiki/Ring_Line_(Oslo)", "kind": "wikipedia", "quote": "On 20 August 2006, the final section opened, from Storo via Sinsen to Carl Berners plass ... the whole project costing NOK 1,348 million", "tier": "secondary", "title": "Ring Line (Oslo) — Wikipedia (ring completed 20 Aug 2006)", "url": "https://en.wikipedia.org/wiki/Ring_Line_(Oslo)" } ] }, { "confidence": "low", "geometryRef": "oslo-5", "id": "oslo-5-1966-shared-28", "kind": "extension", "label": { "en": "Shared track: common eastern tunnel (Grønland–Jernbanetorget) (opened with line 1 on 1966-05-22)" }, "notes": "Line 5 (Ringen) runs over track that opened on 1966-05-22; attributed for map continuity (no separate cost, to avoid double-counting shared infrastructure).", "opened": "1966-05-22", "segment": { "fromStopIndex": 28, "toStopIndex": 30 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260116101049/https://en.wikipedia.org/wiki/Lambertseter_Line", "kind": "wikipedia", "quote": "The last trams operated during the night between 17 and 18 May 1966. ... opened as the first part of the Oslo Metro on 22 May 1966 ... Building the new stations commenced in October 1963 and were completed by the end of 1965, with upgrade costs of 11 million kroner, excluding third rail.", "tier": "secondary", "title": "Lambertseter Line - Wikipedia", "url": "https://en.wikipedia.org/wiki/Lambertseter_Line" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260512160603/https://no.wikipedia.org/wiki/T-banen_i_Oslo", "kind": "wikipedia", "title": "T-banen i Oslo — Wikipedia (no) (eastern lines reached Jernbanetorget 22 May 1966)", "url": "https://no.wikipedia.org/wiki/T-banen_i_Oslo" } ] }, { "confidence": "low", "geometryRef": "oslo-5", "id": "oslo-5-1987-shared-31", "kind": "extension", "label": { "en": "Shared track: Stortinget infill on the common tunnel (opened with line 1 on 1987-03-07)" }, "notes": "Line 5 (Ringen) runs over track that opened on 1987-03-07; attributed for map continuity (no separate cost, to avoid double-counting shared infrastructure).", "opened": "1987-03-07", "segment": { "fromStopIndex": 30, "toStopIndex": 32 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251229154246/https://en.wikipedia.org/wiki/Stortinget_station", "kind": "wikipedia", "title": "Stortinget station — Wikipedia (opened as Sentrum 1977; reopened as Stortinget 7 Mar 1987)", "url": "https://en.wikipedia.org/wiki/Stortinget_station" } ] }, { "confidence": "low", "geometryRef": "oslo-5", "id": "oslo-5-1928-shared-32", "kind": "extension", "label": { "en": "Shared track: central tunnel (Majorstuen–Nationaltheatret) (opened with line 1 on 1928-06-27)" }, "notes": "Line 5 (Ringen) runs over track that opened on 1928-06-27; attributed for map continuity (no separate cost, to avoid double-counting shared infrastructure).", "opened": "1928-06-27", "segment": { "fromStopIndex": 32, "toStopIndex": 33 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251112102036/https://en.wikipedia.org/wiki/Common_Tunnel", "kind": "wikipedia", "title": "Common Tunnel — Wikipedia (western section opened 1928)", "url": "https://en.wikipedia.org/wiki/Common_Tunnel" } ] }, { "confidence": "low", "geometryRef": "oslo-5", "id": "oslo-5-1934-shared-34", "kind": "extension", "label": { "en": "Shared track: Sognsvannsbanen (Majorstuen–Ullevål stadion) (opened with line 4 on 1934-10-10)" }, "notes": "Line 5 (Ringen) runs over track that opened on 1934-10-10; attributed for map continuity (no separate cost, to avoid double-counting shared infrastructure).", "opened": "1934-10-10", "segment": { "fromStopIndex": 33, "toStopIndex": 36 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20251010075759/https://en.wikipedia.org/wiki/Sognsvannsbanen", "kind": "wikipedia", "quote": "Work commenced again in 1933 and the line opened on 10 October 1934.", "tier": "secondary", "title": "Sognsvann Line - Wikipedia", "url": "https://en.wikipedia.org/wiki/Sognsvannsbanen" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260218144418/https://no.wikipedia.org/wiki/Sognsvannsbanen", "kind": "wikipedia", "title": "Sognsvannsbanen — Wikipedia (no) (opened 10 Oct 1934)", "url": "https://no.wikipedia.org/wiki/Sognsvannsbanen" } ] } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20250826004542/https://en.wikipedia.org/wiki/Grorud_Line", "kind": "wikipedia", "tier": "tertiary", "title": "Grorud Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Grorud_Line" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251222123841/https://en.wikipedia.org/wiki/Sognsvann_line", "kind": "wikipedia", "tier": "tertiary", "title": "Sognsvann Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Sognsvann_Line" } ] } ], "name": { "en": "Oslo", "no": "Oslo" } }, { "bbox": [ 4.1, 51.83, 4.6, 52.09 ], "center": [ 4.47, 51.92 ], "country": "Netherlands", "defaultZoom": 10, "homeCurrency": "EUR", "id": "rotterdam", "lines": [ { "cityId": "rotterdam", "color": "#1BC5E9", "displayNumber": "D", "id": "rotterdam-line-D", "name": { "en": "Line D (former Erasmuslijn / Noord-Zuidlijn)" }, "phases": [ { "confidence": "medium", "constructionStart": "1960", "cost": { "basis": "outturn", "confidence": "low", "nominal": { "currency": "NLG", "isEstimate": false, "value": 170000000, "year": 1968 }, "notes": "Final build cost ≈ƒ170M (~€77M) plus ~ƒ20M associated works (nl.wikipedia). The 14 May 1960 first sheet-pile is well sourced (wederopbouwrotterdam.nl); the 14 May 1959 council authorization of ƒ134M was the approved budget, not the outturn. See research.json for full provenance. [Citation chase 2026-06-11] The ƒ170M outturn is supported only by an uncited nl.wikipedia statement (the Erasmuslijn article contains zero ref citations); no primary or secondary source corroborates it. The only independently sourced cost figure is the ƒ134M budget authorized by the city council on 14 May 1959 (wederopbouwrotterdam.nl).", "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260312063205/https://nl.wikipedia.org/wiki/Erasmuslijn", "kind": "wikipedia", "quote": "een bedrag van 170 miljoen gulden (ruim 77 miljoen euro) ... voor twintig miljoen gulden (negen miljoen euro) aan bijkomende werken", "tier": "tertiary", "title": "Erasmuslijn — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/Erasmuslijn" }, { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20251102185153/https://wederopbouwrotterdam.nl/en/articles/rotterdam-builds-metro", "kind": "other", "quote": "On 9 February 1968 the Rotterdam metro officially opened, with as very first passengers Princess Beatrix and Prince Claus.", "tier": "secondary", "title": "Rotterdam builds a metro — Post-war Reconstruction Community Rotterdam", "url": "https://wederopbouwrotterdam.nl/en/articles/rotterdam-builds-metro" } ] }, "geometryRef": "rotterdam-D", "id": "rotterdam-d-1968", "kind": "initial", "label": { "en": "First metro in the Netherlands opens: Centraal Station → Zuidplein" }, "notes": "[Date chase 2026-06-12] Construction-start year 1960 is corroborated by two secondary sources; precise first-work dates differ by source (19 Apr 1960 first excavation per NL Wikipedia photo caption; 14 May 1960 'Construction Day'/first sheetpile per wederopbouwrotterdam.nl). No inline citation attaches directly to the 1960 statement in the NL Wikipedia wikitext. [Opening-date chase 2026-06-13] Royal inaugural ceremony (Princess Beatrix and Prince Claus as first passengers) and public service launch coincided on 9 February 1968; no separate revenue-service date is documented.", "opened": "1968-02-09", "segment": { "fromStopIndex": 9, "toStopIndex": 16 }, "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260312063205/https://nl.wikipedia.org/wiki/Erasmuslijn", "kind": "wikipedia", "quote": "een bedrag van 170 miljoen gulden (ruim 77 miljoen euro) ... voor twintig miljoen gulden (negen miljoen euro) aan bijkomende werken", "tier": "tertiary", "title": "Erasmuslijn — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/Erasmuslijn" }, { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20251102185153/https://wederopbouwrotterdam.nl/en/articles/rotterdam-builds-metro", "kind": "other", "quote": "On 9 February 1968 the Rotterdam metro officially opened, with as very first passengers Princess Beatrix and Prince Claus.", "tier": "secondary", "title": "Rotterdam builds a metro — wederopbouwrotterdam.nl", "url": "https://wederopbouwrotterdam.nl/en/articles/rotterdam-builds-metro" } ], "stationCount": 5 }, { "confidence": "low", "geometryRef": "rotterdam-D", "id": "rotterdam-d-1970", "kind": "extension", "label": { "en": "South extension: Zuidplein → Slinge" }, "opened": "1970-11-25", "segment": { "fromStopIndex": 8, "toStopIndex": 9 }, "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260312063205/https://nl.wikipedia.org/wiki/Erasmuslijn", "kind": "wikipedia", "quote": "op 25 november 1970 naar station Slinge", "tier": "tertiary", "title": "Erasmuslijn — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/Erasmuslijn" } ] }, { "confidence": "low", "geometryRef": "rotterdam-D", "id": "rotterdam-d-1974", "kind": "extension", "label": { "en": "South to Hoogvliet: Slinge → Zalmplaat (via Rhoon, Poortugaal)" }, "opened": "1974-10-25", "segment": { "fromStopIndex": 5, "toStopIndex": 8 }, "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260312063205/https://nl.wikipedia.org/wiki/Erasmuslijn", "kind": "wikipedia", "quote": "op 25 oktober 1974 naar station Zalmplaat in de deelgemeente Hoogvliet", "tier": "tertiary", "title": "Erasmuslijn — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/Erasmuslijn" } ] }, { "confidence": "low", "geometryRef": "rotterdam-D", "id": "rotterdam-d-1985", "kind": "extension", "label": { "en": "South to Spijkenisse: Zalmplaat → De Akkers" }, "opened": "1985-04-25", "segment": { "fromStopIndex": 0, "toStopIndex": 5 }, "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260312063205/https://nl.wikipedia.org/wiki/Erasmuslijn", "kind": "wikipedia", "quote": "op 25 april 1985 naar station De Akkers in de gemeente Spijkenisse", "tier": "tertiary", "title": "Erasmuslijn — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/Erasmuslijn" }, { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20251125025841/https://en.wikipedia.org/wiki/De_Akkers_metro_station", "kind": "wikipedia", "quote": "opened on 25 April 1985 as a terminus of the North-South Line", "tier": "tertiary", "title": "De Akkers metro station — Wikipedia", "url": "https://en.wikipedia.org/wiki/De_Akkers_metro_station" } ], "stationCount": 3 } ], "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260312063205/https://nl.wikipedia.org/wiki/Erasmuslijn", "kind": "wikipedia", "title": "Erasmuslijn — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/Erasmuslijn" }, { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260501212325/https://en.wikipedia.org/wiki/Rotterdam_Metro", "kind": "wikipedia", "title": "Rotterdam Metro — Wikipedia", "url": "https://en.wikipedia.org/wiki/Rotterdam_Metro" } ] }, { "cityId": "rotterdam", "color": "#00AA50", "displayNumber": "A", "id": "rotterdam-line-A", "name": { "en": "Line A (former Oost-Westlijn / Calandlijn)" }, "phases": [ { "confidence": "medium", "geometryRef": "rotterdam-A", "id": "rotterdam-a-1982", "kind": "initial", "label": { "en": "East–West Line opens (shared trunk): Capelsebrug → Coolhaven" }, "notes": "[Opening-date chase 2026-06-13] NL Lijn A infobox shows an uncited '10 mei 1982' inconsistent with all body-text sources (6 May 1982); treated as likely error.", "opened": "1982-05-06", "segment": { "fromStopIndex": 7, "toStopIndex": 16 }, "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20251211225859/https://en.wikipedia.org/wiki/Rotterdam_Metro_line_A", "kind": "wikipedia", "quote": "On 6 May 1982, the second metro line in Rotterdam was opened between Capelsebrug and Coolhaven, then called the East–West Line", "tier": "secondary", "title": "Rotterdam Metro line A — Wikipedia", "url": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_A" }, { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260501212325/https://en.wikipedia.org/wiki/Rotterdam_Metro", "kind": "wikipedia", "quote": "In 1982 a second line was opened, the Oost – Westlijn (lit. 'East – West line'), running between Capelsebrug and Coolhaven stations.", "tier": "secondary", "title": "Rotterdam Metro — Wikipedia", "url": "https://en.wikipedia.org/wiki/Rotterdam_Metro" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251119122041/https://nl.wikipedia.org/wiki/Calandlijn", "kind": "other", "publisher": "Wikipedia (Dutch)", "quote": "Op 6 mei 1982 werd uiteindelijk het eerste deel van de lijn in gebruik genomen tussen de stations Coolhaven en Capelsebrug.", "tier": "secondary", "title": "Calandlijn — Wikipedia (Dutch)", "url": "https://nl.wikipedia.org/wiki/Calandlijn", "via": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_A" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260121230636/https://nl.wikipedia.org/wiki/Lijn_A_(metro_van_Rotterdam)", "kind": "other", "publisher": "Wikipedia (Dutch)", "quote": "Op 6 mei 1982 werd de tweede metrolijn van Rotterdam geopend tussen Capelsebrug en Coolhaven, toen Oost-Westlijn genaamd.", "tier": "secondary", "title": "Lijn A (metro van Rotterdam) — Wikipedia (Dutch)", "url": "https://nl.wikipedia.org/wiki/Lijn_A_(metro_van_Rotterdam)", "via": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_A" } ] }, { "confidence": "medium", "geometryRef": "rotterdam-A", "id": "rotterdam-a-1983", "kind": "extension", "label": { "en": "Northeast branch: Capelsebrug → Binnenhof (Ommoord). Day disputed (27 vs 28 May 1983); year firm." }, "opened": "1983-05-27", "segment": { "fromStopIndex": 0, "toStopIndex": 7 }, "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20251211225859/https://en.wikipedia.org/wiki/Rotterdam_Metro_line_A", "kind": "wikipedia", "quote": "On 27 May 1983, the line was extended as a light rail to its current terminus Binnenhof", "tier": "secondary", "title": "Rotterdam Metro line A — Wikipedia", "url": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_A" }, { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260212043551/https://en.wikipedia.org/wiki/Binnenhof%5Fmetro%5Fstation", "kind": "wikipedia", "quote": "This station was opened on 28 May 1983 when the East-West Line or Calandlijn was extended from its previous terminus Capelsebrug.", "tier": "secondary", "title": "Binnenhof metro station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Binnenhof_metro_station" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251119122041/https://nl.wikipedia.org/wiki/Calandlijn", "kind": "other", "publisher": "Wikipedia (Dutch)", "quote": "Op 27 mei 1983 werd de sneltram naar Ommoord opgeleverd. … Op 27 mei 1983 volgde de verlenging naar station Binnenhof in de wijk Ommoord.", "tier": "secondary", "title": "Calandlijn — Wikipedia (Dutch)", "url": "https://nl.wikipedia.org/wiki/Calandlijn", "via": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_A" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260121230636/https://nl.wikipedia.org/wiki/Lijn_A_(metro_van_Rotterdam)", "kind": "other", "publisher": "Wikipedia (Dutch)", "quote": "Op 27 mei 1983 werd de lijn als sneltram doorgetrokken tot het huidige eindpunt Binnenhof in de wijk Ommoord.", "tier": "secondary", "title": "Lijn A (metro van Rotterdam) — Wikipedia (Dutch)", "url": "https://nl.wikipedia.org/wiki/Lijn_A_(metro_van_Rotterdam)", "via": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_A" } ] }, { "confidence": "medium", "geometryRef": "rotterdam-A", "id": "rotterdam-a-1986", "kind": "extension", "label": { "en": "West extension: Coolhaven → Marconiplein" }, "opened": "1986-04-25", "segment": { "fromStopIndex": 16, "toStopIndex": 17 }, "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20251211225859/https://en.wikipedia.org/wiki/Rotterdam_Metro_line_A", "kind": "wikipedia", "quote": "On 25 April 1986, the line was extended westward to Marconiplein station.", "tier": "secondary", "title": "Rotterdam Metro line A — Wikipedia", "url": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_A" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251119122041/https://nl.wikipedia.org/wiki/Calandlijn", "kind": "other", "publisher": "Wikipedia (Dutch)", "quote": "De Calandlijn kreeg op 25 april 1986 een ondergrondse verlenging van de Coolhaven naar het Marconiplein.", "tier": "secondary", "title": "Calandlijn — Wikipedia (Dutch)", "url": "https://nl.wikipedia.org/wiki/Calandlijn", "via": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_A" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260121230636/https://nl.wikipedia.org/wiki/Lijn_A_(metro_van_Rotterdam)", "kind": "other", "publisher": "Wikipedia (Dutch)", "quote": "Op 25 april 1986 werd de lijn in westelijke richting verlengd naar station Marconiplein.", "tier": "secondary", "title": "Lijn A (metro van Rotterdam) — Wikipedia (Dutch)", "url": "https://nl.wikipedia.org/wiki/Lijn_A_(metro_van_Rotterdam)", "via": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_A" } ] }, { "confidence": "medium", "geometryRef": "rotterdam-A", "id": "rotterdam-a-2002", "kind": "extension", "label": { "en": "West via Beneluxlijn: Marconiplein → Schiedam Centrum" }, "opened": "2002-11-04", "segment": { "fromStopIndex": 17, "toStopIndex": 19 }, "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20251211225859/https://en.wikipedia.org/wiki/Rotterdam_Metro_line_A", "kind": "wikipedia", "quote": "a westward extension from Marconiplein followed on 4 November 2002, connecting via Schiedam and Pernis to the new Tussenwater station", "tier": "secondary", "title": "Rotterdam Metro line A — Wikipedia", "url": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_A" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251119122041/https://nl.wikipedia.org/wiki/Calandlijn", "kind": "other", "publisher": "Wikipedia (Dutch)", "quote": "Sinds 4 november 2002 is de Calandlijn in het westen verlengd vanaf het Marconiplein via Schiedam, de Beneluxtunnel en Pernis naar Hoogvliet.", "tier": "secondary", "title": "Calandlijn — Wikipedia (Dutch)", "url": "https://nl.wikipedia.org/wiki/Calandlijn", "via": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_A" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260211120535/https://nl.wikipedia.org/wiki/Beneluxlijn", "kind": "other", "publisher": "Wikipedia (Dutch)", "quote": "Sinds de opening op 4 november 2002 maakt het traject deel uit van de Calandlijn.", "tier": "secondary", "title": "Beneluxlijn — Wikipedia (Dutch)", "url": "https://nl.wikipedia.org/wiki/Beneluxlijn", "via": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_A" } ] } ], "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20251211225859/https://en.wikipedia.org/wiki/Rotterdam_Metro_line_A", "kind": "wikipedia", "title": "Rotterdam Metro line A — Wikipedia", "url": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_A" } ] }, { "cityId": "rotterdam", "color": "#EF1F1F", "displayNumber": "C", "id": "rotterdam-line-C", "name": { "en": "Line C (former Calandlijn red branch)" }, "phases": [ { "confidence": "medium", "constructionStart": "1973", "geometryRef": "rotterdam-C", "id": "rotterdam-c-1982", "kind": "initial", "label": { "en": "East–West Line opens (shared trunk): Coolhaven → Capelsebrug" }, "notes": "[Date chase 2026-06-12] Construction-start year (1973) is supported by the Calandlijn article's narrative, which explicitly separates 1972 preparatory works from 1973 actual construction. The statement carries no inline external citation; confidence rests on Wikipedia editorial narrative. [Opening-date chase 2026-06-13] Opening day uncertain at day granularity: Calandlijn 6 mei, Coolhaven station 10 mei, Capelsebrug station 27 mei 1982. Year firm.", "opened": "1982-05-06", "segment": { "fromStopIndex": 13, "toStopIndex": 22 }, "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20251119122041/https://nl.wikipedia.org/wiki/Calandlijn", "kind": "wikipedia", "quote": "Op 6 mei 1982 werd uiteindelijk het eerste deel van de lijn in gebruik genomen tussen de stations Coolhaven en Capelsebrug.", "tier": "tertiary", "title": "Calandlijn — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/Calandlijn" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251205062958/https://nl.wikipedia.org/wiki/Coolhaven_(metrostation)", "kind": "other", "publisher": "Wikipedia (NL)", "quote": "Het station werd geopend op 10 mei 1982", "tier": "tertiary", "title": "Coolhaven (metrostation) — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/Coolhaven_(metrostation)", "via": "https://nl.wikipedia.org/wiki/Calandlijn" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250713030603/https://nl.wikipedia.org/wiki/Capelsebrug_(metrostation)", "kind": "other", "publisher": "Wikipedia (NL)", "quote": "Opening: 27 mei 1982", "tier": "tertiary", "title": "Capelsebrug (metrostation) — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/Capelsebrug_(metrostation)", "via": "https://nl.wikipedia.org/wiki/Calandlijn" } ] }, { "confidence": "medium", "geometryRef": "rotterdam-C", "id": "rotterdam-c-1986", "kind": "extension", "label": { "en": "West extension: Coolhaven → Marconiplein" }, "opened": "1986-04-25", "segment": { "fromStopIndex": 12, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20251119122041/https://nl.wikipedia.org/wiki/Calandlijn", "kind": "wikipedia", "quote": "De Calandlijn kreeg op 25 april 1986 een ondergrondse verlenging van de Coolhaven naar het Marconiplein.", "tier": "tertiary", "title": "Calandlijn — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/Calandlijn" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260110154038/https://nl.wikipedia.org/wiki/Marconiplein_(metrostation)", "kind": "other", "publisher": "Wikipedia (NL)", "quote": "Het metrostation Marconiplein werd geopend op 25 april 1986", "tier": "tertiary", "title": "Marconiplein (metrostation) — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/Marconiplein_(metrostation)", "via": "https://nl.wikipedia.org/wiki/Calandlijn" } ] }, { "confidence": "medium", "geometryRef": "rotterdam-C", "id": "rotterdam-c-1994", "kind": "extension", "label": { "en": "Northeast viaduct branch: Capelsebrug → De Terp (Capelle a/d IJssel). Day disputed (26 vs 29 May 1994); year firm." }, "opened": "1994-05-29", "segment": { "fromStopIndex": 22, "toStopIndex": 25 }, "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20251119122041/https://nl.wikipedia.org/wiki/Calandlijn", "kind": "wikipedia", "quote": "Sinds 29 mei 1994 is er een aftakking op een viaduct van de Capelsebrug naar Capelle aan den IJssel.", "tier": "tertiary", "title": "Calandlijn — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/Calandlijn" }, { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260124154805/https://en.wikipedia.org/wiki/De_Terp_metro_station", "kind": "wikipedia", "quote": "The station was opened on 26 May 1994 as part of the extension of the East-West Line or Caland Line from Capelsebrug station.", "tier": "tertiary", "title": "De Terp metro station — Wikipedia", "url": "https://en.wikipedia.org/wiki/De_Terp_metro_station" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260312122204/https://nl.wikipedia.org/wiki/De_Terp_(metrostation)", "kind": "other", "publisher": "Wikipedia (NL)", "quote": "Station De Terp werd geopend op 26 mei 1994.", "tier": "tertiary", "title": "De Terp (metrostation) — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/De_Terp_(metrostation)", "via": "https://nl.wikipedia.org/wiki/Calandlijn" } ], "stationCount": 3 }, { "confidence": "medium", "constructionStart": "1996", "cost": { "basis": "estimate", "confidence": "low", "nominal": { "currency": "EUR", "isEstimate": true, "value": 724000000, "year": 2002 }, "notes": "Beneluxlijn project estimated €724M (national government funded 95%); the actual outturn was reported ~€60M lower (~€664M). The precise €724M figure was flagged by adversarial verification (estimate vs outturn conflict) — marked estimate. See research.json.", "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260211120535/https://nl.wikipedia.org/wiki/Beneluxlijn", "kind": "wikipedia", "quote": "In datzelfde jaar begonnen de voorbereidende werkzaamheden, een jaar later startte de daadwerkelijke bouw van de lijn.", "tier": "tertiary", "title": "Beneluxlijn — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/Beneluxlijn" } ] }, "geometryRef": "rotterdam-C", "id": "rotterdam-c-2002", "kind": "extension", "label": { "en": "Beneluxlijn opens: Marconiplein → Schiedam → Spijkenisse / De Akkers" }, "notes": "[Date chase 2026-06-12] 1996 construction start derived from Beneluxlijn article: planning/preparatory works in 1995, actual construction 'a year later' (1996). No inline external citation backs the statement; rests on Wikipedia editorial narrative. The Beneluxlijn source is already attached to this phase in the curated file.", "opened": "2002-11-04", "segment": { "fromStopIndex": 0, "toStopIndex": 12 }, "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20251119122041/https://nl.wikipedia.org/wiki/Calandlijn", "kind": "wikipedia", "quote": "Sinds 4 november 2002 is de Calandlijn in het westen verlengd vanaf het Marconiplein via Schiedam, de Beneluxtunnel en Pernis naar Hoogvliet, en rijdt deze over de Erasmuslijn door naar Spijkenisse.", "tier": "tertiary", "title": "Calandlijn — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/Calandlijn" }, { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260211120535/https://nl.wikipedia.org/wiki/Beneluxlijn", "kind": "wikipedia", "quote": "In datzelfde jaar begonnen de voorbereidende werkzaamheden, een jaar later startte de daadwerkelijke bouw van de lijn.", "tier": "tertiary", "title": "Beneluxlijn — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/Beneluxlijn" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260501212325/https://en.wikipedia.org/wiki/Rotterdam_Metro", "kind": "other", "publisher": "Wikipedia (EN)", "quote": "On 4 November 2002 an extension through the city of Schiedam towards Spijkenisse was opened.", "tier": "tertiary", "title": "Rotterdam Metro — Wikipedia (EN)", "url": "https://en.wikipedia.org/wiki/Rotterdam_Metro", "via": "https://nl.wikipedia.org/wiki/Calandlijn" } ], "stationCount": 6 } ], "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20251119122041/https://nl.wikipedia.org/wiki/Calandlijn", "kind": "wikipedia", "title": "Calandlijn — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/Calandlijn" }, { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260203003745/https://nl.wikipedia.org/wiki/Lijn_C_(metro_van_Rotterdam)", "kind": "wikipedia", "title": "Lijn C (metro van Rotterdam) — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/Lijn_C_(metro_van_Rotterdam)" } ] }, { "cityId": "rotterdam", "color": "#FFD301", "displayNumber": "B", "id": "rotterdam-line-B", "name": { "en": "Line B (former Calandlijn; longest metro line in the Benelux)" }, "phases": [ { "confidence": "medium", "geometryRef": "rotterdam-B", "id": "rotterdam-b-1982", "kind": "initial", "label": { "en": "East–West Line opens (shared trunk): Capelsebrug → Coolhaven" }, "opened": "1982-05-06", "segment": { "fromStopIndex": 10, "toStopIndex": 19 }, "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260129181651/https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B", "kind": "wikipedia", "quote": "Opened 6 May 1982; 44 years ago (1982-05-06) (Capelsebrug to Coolhaven)", "tier": "tertiary", "title": "Rotterdam Metro line B — Wikipedia", "url": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251211225859/https://en.wikipedia.org/wiki/Rotterdam_Metro_line_A", "kind": "other", "publisher": "Wikipedia (en)", "quote": "On 6 May 1982, the second metro line in Rotterdam was opened between Capelsebrug and Coolhaven.", "tier": "tertiary", "title": "Rotterdam Metro line A — Wikipedia", "url": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_A", "via": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251119122041/https://nl.wikipedia.org/wiki/Calandlijn", "kind": "other", "publisher": "Wikipedia (nl)", "quote": "Op 6 mei 1982 werd uiteindelijk het eerste deel van de lijn in gebruik genomen tussen de stations Coolhaven en Capelsebrug.", "tier": "tertiary", "title": "Calandlijn — Wikipedia (nl)", "url": "https://nl.wikipedia.org/wiki/Calandlijn", "via": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B" } ] }, { "confidence": "medium", "geometryRef": "rotterdam-B", "id": "rotterdam-b-1984", "kind": "extension", "label": { "en": "Northeast branch: Capelsebrug → De Tochten (Zevenkamp)" }, "opened": "1984-04-24", "segment": { "fromStopIndex": 1, "toStopIndex": 10 }, "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260129181651/https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B", "kind": "wikipedia", "quote": "On 24 April 1984, the East–West Line...was expanded with a branch from Graskruid to De Tochten in the Zevenkamp district.", "tier": "tertiary", "title": "Rotterdam Metro line B — Wikipedia", "url": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251119122041/https://nl.wikipedia.org/wiki/Calandlijn", "kind": "other", "publisher": "Wikipedia (nl)", "quote": "Een aftakking van de sneltram naar Zevenkamp werd op 24 april 1984 in gebruik genomen.", "tier": "tertiary", "title": "Calandlijn — Wikipedia (nl)", "url": "https://nl.wikipedia.org/wiki/Calandlijn", "via": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B" } ] }, { "confidence": "medium", "geometryRef": "rotterdam-B", "id": "rotterdam-b-1986", "kind": "extension", "label": { "en": "West extension: Coolhaven → Marconiplein" }, "opened": "1986-04-25", "segment": { "fromStopIndex": 19, "toStopIndex": 20 }, "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260129181651/https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B", "kind": "wikipedia", "quote": "On 25 April 1986, the line was extended westward to Marconiplein.", "tier": "tertiary", "title": "Rotterdam Metro line B — Wikipedia", "url": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251119122041/https://nl.wikipedia.org/wiki/Calandlijn", "kind": "other", "publisher": "Wikipedia (nl)", "quote": "De Calandlijn kreeg op 25 april 1986 een ondergrondse verlenging van de Coolhaven naar het Marconiplein.", "tier": "tertiary", "title": "Calandlijn — Wikipedia (nl)", "url": "https://nl.wikipedia.org/wiki/Calandlijn", "via": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260312012016/https://nl.wikipedia.org/wiki/Lijn_B_(metro_van_Rotterdam)", "kind": "other", "publisher": "Wikipedia (nl)", "quote": "25 april 1986: Coolhaven - Marconiplein", "tier": "tertiary", "title": "Lijn B (metro van Rotterdam) — Wikipedia (nl)", "url": "https://nl.wikipedia.org/wiki/Lijn_B_(metro_van_Rotterdam)", "via": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B" } ] }, { "confidence": "medium", "geometryRef": "rotterdam-B", "id": "rotterdam-b-2002", "kind": "extension", "label": { "en": "Beneluxlijn west: Marconiplein → Schiedam Centrum" }, "opened": "2002-11-04", "segment": { "fromStopIndex": 20, "toStopIndex": 22 }, "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260129181651/https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B", "kind": "wikipedia", "quote": "a westward extension from Marconiplein followed on 4 November 2002, connecting via Schiedam and Pernis to the new Tussenwater station", "tier": "tertiary", "title": "Rotterdam Metro line B — Wikipedia", "url": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260312012016/https://nl.wikipedia.org/wiki/Lijn_B_(metro_van_Rotterdam)", "kind": "other", "publisher": "Wikipedia (nl)", "quote": "4 november 2002: Marconiplein - Schiedam Centrum", "tier": "tertiary", "title": "Lijn B (metro van Rotterdam) — Wikipedia (nl)", "url": "https://nl.wikipedia.org/wiki/Lijn_B_(metro_van_Rotterdam)", "via": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B" } ] }, { "confidence": "medium", "geometryRef": "rotterdam-B", "id": "rotterdam-b-2005", "kind": "extension", "label": { "en": "Northeast terminus: De Tochten → Nesselande" }, "opened": "2005-08-29", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260129181651/https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B", "kind": "wikipedia", "quote": "Since 29 August 2005, when the line was extended by one station from De Tochten to Nesselande...", "tier": "tertiary", "title": "Rotterdam Metro line B — Wikipedia", "url": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260312012016/https://nl.wikipedia.org/wiki/Lijn_B_(metro_van_Rotterdam)", "kind": "other", "publisher": "Wikipedia (nl)", "quote": "29 augustus 2005: De Tochten - Nesselande", "tier": "tertiary", "title": "Lijn B (metro van Rotterdam) — Wikipedia (nl)", "url": "https://nl.wikipedia.org/wiki/Lijn_B_(metro_van_Rotterdam)", "via": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B" } ], "stationCount": 1 }, { "confidence": "high", "constructionStart": "2017", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "EUR", "isEstimate": false, "value": 462000000, "year": 2019 }, "notes": "Hoekse Lijn rail-to-metro conversion (Schiedam–Hoek van Holland). Initial estimate €370M; final €462M, an overrun of >€90M (polluted soil, asbestos). Firm figure (Railway PRO + Wikipedia). [Citation chase 2026-06-11] The €462M figure is the actual final (outturn) cost reported at the September 2019 inauguration, not a forecast. Only one strong source (Railway PRO) states the full €370M→€462M breakdown; the Wikipedia statement is uncited and confirms only the ~€90M overrun, so corroboration is partial.", "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20240329180709/https://www.railwaypro.com/wp/rotterdam-opens-the-last-extension-of-line-b/", "kind": "news", "quote": "The initial costs for the conversion project were estimated at EUR 370 million... Thus, the costs have increased by more than EUR 90 million to a total value of EUR 462 million.", "tier": "secondary", "title": "Rotterdam Line B metro extension inaugurated — Railway PRO", "url": "https://www.railwaypro.com/wp/rotterdam-opens-the-last-extension-of-line-b/" }, { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260129181651/https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B", "kind": "wikipedia", "quote": "Construction costs also exceeded the budget by 90 million euros.", "tier": "tertiary", "title": "Rotterdam Metro line B — Wikipedia", "url": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B" } ] }, "geometryRef": "rotterdam-B", "id": "rotterdam-b-2019", "kind": "extension", "label": { "en": "Hoekse Lijn metro conversion: Schiedam Centrum → Hoek van Holland Haven" }, "notes": "[Date chase 2026-06-12] Dutch Wikipedia (Hoekse Lijn) states conversion began April 2017 ('Bij de start van de verbouwing in april 2017'); railway service ended 31 March 2017 per Urban Transport Magazine, confirming the 2017 construction-start year. [Opening-date chase 2026-06-13] 28 Sep 2019 was a free 'open day' on a partial route (Schiedam Nieuwland–Hoek van Holland Haven); first scheduled revenue service ran 30 Sep 2019 at ~05:30. This was the line's successful reopening after five failed attempts.", "opened": "2019-09-30", "segment": { "fromStopIndex": 22, "toStopIndex": 30 }, "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260129181651/https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B", "kind": "wikipedia", "quote": "Construction costs also exceeded the budget by 90 million euros.", "tier": "tertiary", "title": "Rotterdam Metro line B — Wikipedia", "url": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B" }, { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260207011719/https://www.urban-transport-magazine.com/en/railway-becomes-metro-rotterdams-hoek-van-holland-line/", "kind": "news", "title": "Railway becomes metro: Rotterdam's Hoek van Holland line — Urban Transport Magazine", "url": "https://www.urban-transport-magazine.com/en/railway-becomes-metro-rotterdams-hoek-van-holland-line/" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260311140836/https://nl.wikipedia.org/wiki/Hoekse_Lijn", "kind": "other", "publisher": "Wikipedia", "quote": "Bij de start van de verbouwing in april 2017 werd uitgegaan van een heropening na vijf maanden.", "tier": "secondary", "title": "Hoekse Lijn — Wikipedia (nl)", "url": "https://nl.wikipedia.org/wiki/Hoekse_Lijn", "via": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B" } ] }, { "confidence": "high", "geometryRef": "rotterdam-B", "id": "rotterdam-b-2023", "kind": "extension", "label": { "en": "Metro aan Zee: Hoek van Holland Haven → Hoek van Holland Strand" }, "opened": "2023-03-31", "segment": { "fromStopIndex": 30, "toStopIndex": 31 }, "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260129181651/https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B", "kind": "wikipedia", "quote": "Metro aan Zee is the name for the final part of the extension of Line B...It was opened on 31 March 2023.", "tier": "tertiary", "title": "Rotterdam Metro line B — Wikipedia", "url": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B" }, { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20240329180709/https://www.railwaypro.com/wp/rotterdam-opens-the-last-extension-of-line-b/", "kind": "news", "quote": "the latest extension (the 1.2 km stretch to Hoek van Holland Strand) entering service on March 31, 2023", "tier": "secondary", "title": "Rotterdam Line B metro extension inaugurated — Railway PRO", "url": "https://www.railwaypro.com/wp/rotterdam-opens-the-last-extension-of-line-b/" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260312012016/https://nl.wikipedia.org/wiki/Lijn_B_(metro_van_Rotterdam)", "kind": "other", "publisher": "Wikipedia (nl)", "quote": "31 maart 2023: Hoek van Holland Haven - Hoek van Holland Strand [...] Op 31 maart 2023 werd die in gebruik genomen.", "tier": "tertiary", "title": "Lijn B (metro van Rotterdam) — Wikipedia (nl)", "url": "https://nl.wikipedia.org/wiki/Lijn_B_(metro_van_Rotterdam)", "via": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260311140836/https://nl.wikipedia.org/wiki/Hoekse_Lijn", "kind": "other", "publisher": "Wikipedia (nl)", "quote": "Hoek van Holland Haven - Hoek van Holland Strand: 31 maart 2023 [...] In 2023 is de metrolijn volledig opengesteld, van station Schiedam Centrum tot Hoek van Holland Strand.", "tier": "secondary", "title": "Hoekse Lijn — Wikipedia (nl)", "url": "https://nl.wikipedia.org/wiki/Hoekse_Lijn", "via": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260129181651/https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B", "kind": "wikipedia", "title": "Rotterdam Metro line B — Wikipedia", "url": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_B" } ] }, { "cityId": "rotterdam", "color": "#1A389A", "displayNumber": "E", "id": "rotterdam-line-E", "name": { "en": "Line E (RandstadRail, to Den Haag Centraal)" }, "phases": [ { "confidence": "medium", "geometryRef": "rotterdam-E", "id": "rotterdam-e-2006", "kind": "initial", "label": { "en": "RandstadRail opens (Hofpleinlijn conversion): Den Haag Centraal → Rotterdam (temp. Hofplein terminus)" }, "notes": "[Opening-date chase 2026-06-13] Partial-then-full: Hofplein-Nootdorp segment opened 10 Sept 2006; full route to Den Haag Centraal (the curated date) opened 11 Nov 2006.", "opened": "2006-11-11", "segment": { "fromStopIndex": 0, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260529095525/https://nl.wikipedia.org/wiki/Lijn_E_(metro_van_Rotterdam)", "kind": "wikipedia", "quote": "11 november 2006: Den Haag Centraal - Nootdorp", "tier": "tertiary", "title": "Lijn E (metro van Rotterdam) — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/Lijn_E_(metro_van_Rotterdam)" }, { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260521101856/https://en.wikipedia.org/wiki/RandstadRail", "kind": "wikipedia", "quote": "In November 2006, the line was extended to The Hague.", "tier": "tertiary", "title": "RandstadRail — Wikipedia", "url": "https://en.wikipedia.org/wiki/RandstadRail" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260528154807/https://nl.wikipedia.org/wiki/RandstadRail", "kind": "other", "publisher": "Wikipedia (NL)", "quote": "Op 11 november ging metrolijn E rijden op het traject Rotterdam Hofplein - Den Haag Centraal.", "tier": "tertiary", "title": "RandstadRail — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/RandstadRail", "via": "https://nl.wikipedia.org/wiki/Lijn_E_(metro_van_Rotterdam)" } ] }, { "confidence": "medium", "constructionStart": "2003", "geometryRef": "rotterdam-E", "id": "rotterdam-e-2010", "kind": "extension", "label": { "en": "Statenwegtracé bored tunnel: Melanchthonweg → Rotterdam Centraal (via new Blijdorp); replaces Hofplein terminus" }, "notes": "[Date chase 2026-06-12] Construction-start year (2003) for the Statenwegtracé bored tunnel rests on the Dutch Wikipedia Statenwegtracé article, which states it without an inline citation; the underlying RET and RandstadRail.nl primary sources are dead/offline. Chronologically consistent with TBM completion of the two tubes in 2007 and 2008. [Opening-date chase 2026-06-13] First (single) tunnel bore opened 17 Aug 2010; the second tunnel tube followed 22 Aug 2011. The cited RET press release URL is now a dead link.", "opened": "2010-08-17", "segment": { "fromStopIndex": 13, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260113112035/https://nl.wikipedia.org/wiki/Statenwegtrac%C3%A9", "kind": "wikipedia", "quote": "Uiteindelijk is de bouw van deze tunnel in 2003 begonnen met de inzet van één tunnelboormachine. ... per 17 augustus 2010 de verbinding, inclusief het nieuwe station metrostation Blijdorp in gebruik genomen ... De tweede tunnelbuis volgde een jaar later, op 22 augustus 2011.", "tier": "tertiary", "title": "Statenwegtracé — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/Statenwegtrac%C3%A9" }, { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20250911012136/https://en.wikipedia.org/wiki/Rotterdam_Metro_line_E", "kind": "wikipedia", "quote": "On 17 August 2010, however, a new tunnel opened, which connected the metro station at Rotterdam Centraal ... via a new tunnel and new Blijdorp station with the existing tracks.", "tier": "tertiary", "title": "Rotterdam Metro line E — Wikipedia", "url": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_E" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20111002214842/http://www.ret.nl/over-ret/nieuws-en-pers/opening-metrolijn-e-randstad-rail.aspx", "kind": "primary", "publisher": "RET (Rotterdamse Elektrische Tram)", "quote": "Metrolijn E sluit aan op Rotterdam Centraal (RET, 16 juli 2010) [cited in Statenwegtracé article as footnote for 17 August 2010 opening]", "tier": "primary", "title": "Metrolijn E sluit aan op Rotterdam Centraal — RET persbericht (16 juli 2010)", "url": "http://www.ret.nl/over-ret/nieuws-en-pers/opening-metrolijn-e-randstad-rail.aspx", "via": "https://nl.wikipedia.org/wiki/Statenwegtrac%C3%A9" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "rotterdam-E", "id": "rotterdam-e-2011", "kind": "extension", "label": { "en": "South into the metro core: Rotterdam Centraal → Slinge (through-running with Line D)" }, "opened": "2011-12-11", "segment": { "fromStopIndex": 15, "toStopIndex": 22 }, "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260529095525/https://nl.wikipedia.org/wiki/Lijn_E_(metro_van_Rotterdam)", "kind": "wikipedia", "quote": "11 december 2011: Rotterdam Centraal - Slinge", "tier": "tertiary", "title": "Lijn E (metro van Rotterdam) — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/Lijn_E_(metro_van_Rotterdam)" }, { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20250911012136/https://en.wikipedia.org/wiki/Rotterdam_Metro_line_E", "kind": "wikipedia", "quote": "Since the completion of this project in December 2011, all trains coming from Den Haag Centraal terminate at Slinge.", "tier": "tertiary", "title": "Rotterdam Metro line E — Wikipedia", "url": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_E" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260528154807/https://nl.wikipedia.org/wiki/RandstadRail", "kind": "other", "publisher": "Wikipedia (NL)", "quote": "Sinds 11 december 2011 rijden de metro's vanuit Den Haag over het tracé van metrolijn D door naar metrostation Slinge.", "tier": "tertiary", "title": "RandstadRail — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/RandstadRail", "via": "https://nl.wikipedia.org/wiki/Lijn_E_(metro_van_Rotterdam)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260524172125/https://nl.wikipedia.org/wiki/Rotterdamse_metro", "kind": "other", "publisher": "Wikipedia (NL)", "quote": "Op 11 december 2011 werd de lijn verlengd tot metrostation Slinge.", "tier": "tertiary", "title": "Rotterdamse metro — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/Rotterdamse_metro", "via": "https://nl.wikipedia.org/wiki/Lijn_E_(metro_van_Rotterdam)" } ] } ], "sources": [ { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20250911012136/https://en.wikipedia.org/wiki/Rotterdam_Metro_line_E", "kind": "wikipedia", "title": "Rotterdam Metro line E — Wikipedia", "url": "https://en.wikipedia.org/wiki/Rotterdam_Metro_line_E" }, { "accessedAt": "2026-06-04", "archivedUrl": "https://web.archive.org/web/20260529095525/https://nl.wikipedia.org/wiki/Lijn_E_(metro_van_Rotterdam)", "kind": "wikipedia", "title": "Lijn E (metro van Rotterdam) — Wikipedia (NL)", "url": "https://nl.wikipedia.org/wiki/Lijn_E_(metro_van_Rotterdam)" } ] } ], "name": { "en": "Rotterdam", "nl": "Rotterdam" } }, { "bbox": [ 17.78, 59.22, 18.16, 59.43 ], "center": [ 18.06, 59.33 ], "country": "Sweden", "defaultZoom": 10, "homeCurrency": "SEK", "id": "stockholm", "lines": [ { "cityId": "stockholm", "color": "#4e9d45", "displayNumber": "18", "id": "stockholm-line-18", "name": { "en": "Green Line 18 (Hässelby strand ↔ Farsta strand)", "sv": "Gröna linjen 18" }, "phases": [ { "confidence": "medium", "constructionStart": "1944", "geometryRef": "stockholm-18", "id": "stockholm-green-1950", "kind": "initial", "label": { "en": "Stockholm's first metro: Slussen → Hökarängen" }, "notes": "Stockholm’s first true metro section (Slussen–Hökarängen) opened 1 Oct 1950, partly converting tram line 18 and reusing the 1933 Södertunneln tram tunnel under Södermalm. No per-section metro construction cost is published (archival only: Stockholms stadsarkiv / SL annual reports); the ≈4.5M kr (1933) Södertunneln figure is the premetro tram tunnel, not the 1950 metro, so no cost is recorded here. [Date chase 2026-06-12] Construction-start year: chased sources (en Stockholm Metro; sv Stockholms tunnelbana, citing Larsson 1977) consistently give 1944 as the formal start of Stockholm metro construction, the project this first phase represents. No source supports the curated 1945. Larsson 1977 (Yngve Larsson) is the print primary citation behind the 1944 date; not accessible online. [Corrected 2026-06-12 after date chase] Construction start corrected 1945→1944: formal metro construction began 1944 per EN+SV Wikipedia (citing Larsson 1977); no source supports 1945. Panel-confirmed.", "opened": "1950-10-01", "segment": { "fromStopIndex": 22, "toStopIndex": 32 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260311142027/https://en.wikipedia.org/wiki/Green_line_(Stockholm_Metro)", "kind": "wikipedia", "quote": "On Sunday October 1, 1950, the line opened between Slussen and Hökarängen, including the rebuilt tram tracks through the Södertunneln and over the Skanstullsbron.", "tier": "secondary", "title": "Green line (Stockholm metro) - Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_line_(Stockholm_metro)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260509225406/https://sparvagsmuseet.se/historien-om-tunnelbanan/", "kind": "other", "title": "Historien om tunnelbanan — Spårvägsmuseet (Slussen–Hökarängen invigd 1 okt 1950)", "url": "https://sparvagsmuseet.se/historien-om-tunnelbanan/" } ], "stationCount": 10 }, { "confidence": "low", "geometryRef": "stockholm-18", "id": "stockholm-green-vallingby-1952", "kind": "extension", "label": { "en": "Western line opens (detached): Hötorget → Vällingby" }, "opened": "1952-10-26", "segment": { "fromStopIndex": 3, "toStopIndex": 19 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260311142027/https://en.wikipedia.org/wiki/Green_line_(Stockholm_Metro)", "kind": "wikipedia", "quote": "On Sunday October 26, 1952, a detached section of line from Hötorget to Vällingby was opened, including the former tram tracks over the Tranebergsbron and on to Islandstorget.", "tier": "secondary", "title": "Green line (Stockholm metro) — Wikipedia (Hötorget–Vällingby opened 26 Oct 1952)", "url": "https://en.wikipedia.org/wiki/Green_line_(Stockholm_metro)" } ], "stationCount": 15 }, { "confidence": "low", "geometryRef": "stockholm-18", "id": "stockholm-green-hasselbygard-1956", "kind": "extension", "label": { "en": "West extension: Vällingby → Hässelby gård" }, "opened": "1956-11-01", "segment": { "fromStopIndex": 1, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260311142027/https://en.wikipedia.org/wiki/Green_line_(Stockholm_Metro)", "kind": "wikipedia", "quote": "On Thursday November 1, 1956, the line was extended from Vällingby to Hässelby gård.", "tier": "secondary", "title": "Green line (Stockholm metro) - Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_line_(Stockholm_metro)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20250927225213/https://sv.wikipedia.org/wiki/H%C3%A4sselby_strand_(tunnelbanestation)", "kind": "wikipedia", "title": "Hässelby strand (tunnelbanestation) — Wikipedia (sv) (Vällingby–Hässelby gård 1956)", "url": "https://sv.wikipedia.org/wiki/H%C3%A4sselby_strand_(tunnelbanestation)" } ], "stationCount": 2 }, { "confidence": "low", "constructionStart": "1953", "geometryRef": "stockholm-18", "id": "stockholm-green-sammanbindning-1957", "kind": "extension", "label": { "en": "Central link joins west + south: Hötorget → Slussen (T-Centralen, Gamla stan)" }, "notes": "[Date chase 2026-06-12] No explicit construction-start date found for the central link in any chased source. Circumstantial evidence: a 13 December 1952 flood during tunneling at Norrström (sv Stockholms tunnelbana) shows work was underway by late 1952, hinting the curated 1953 start may be slightly late, but this is not a stated start date.", "opened": "1957-11-24", "segment": { "fromStopIndex": 19, "toStopIndex": 22 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260311142027/https://en.wikipedia.org/wiki/Green_line_(Stockholm_Metro)", "kind": "wikipedia", "quote": "On Sunday November 24, 1957, Hotorget was linked to Slussen across central Stockholm, connecting the two previously disconnected sections.", "tier": "secondary", "title": "Green line (Stockholm metro) - Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_line_(Stockholm_metro)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260218175858/https://sv.wikipedia.org/wiki/Gamla_stan_(tunnelbanestation)", "kind": "wikipedia", "title": "Gamla stan (tunnelbanestation) — Wikipedia (sv) (Sammanbindningsbanan opened 24 Nov 1957)", "url": "https://sv.wikipedia.org/wiki/Gamla_stan_(tunnelbanestation)" } ], "stationCount": 2 }, { "confidence": "low", "geometryRef": "stockholm-18", "id": "stockholm-green-hasselbystrand-1958", "kind": "extension", "label": { "en": "West terminus reached: Hässelby gård → Hässelby strand" }, "notes": "[Opening-date chase 2026-06-13] Public revenue service to Hässelby strand began Wednesday 19 November 1958 at 05:00; the 18 November 1958 date reflects the ceremonial VIP inaugural train ('invigningståg', 320 invited guests). For consistency with the Farsta phase (curated 1958-11-19, the revenue date) consider aligning the revenue-service date to 1958-11-19.", "opened": "1958-11-18", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260311142027/https://en.wikipedia.org/wiki/Green_line_(Stockholm_Metro)", "kind": "wikipedia", "quote": "On Tuesday November 18, 1958, the line was extended from Hökarängen to Farsta.", "tier": "secondary", "title": "Green line (Stockholm metro) - Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_line_(Stockholm_metro)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20250927225213/https://sv.wikipedia.org/wiki/H%C3%A4sselby_strand_(tunnelbanestation)", "kind": "wikipedia", "title": "Hässelby strand (tunnelbanestation) — Wikipedia (sv) (terminus opened 18 Nov 1958)", "url": "https://sv.wikipedia.org/wiki/H%C3%A4sselby_strand_(tunnelbanestation)" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "stockholm-18", "id": "stockholm-green-farsta-1958", "kind": "extension", "label": { "en": "South extension: Hökarängen → Farsta" }, "notes": "[Opening-date chase 2026-06-13] Curated 1958-11-19 correctly reflects public revenue service; the 18 November date on English Wikipedia is the ceremonial VIP inaugural run.", "opened": "1958-11-19", "segment": { "fromStopIndex": 32, "toStopIndex": 33 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260311142027/https://en.wikipedia.org/wiki/Green_line_(Stockholm_Metro)", "kind": "wikipedia", "quote": "On Tuesday November 18, 1958, the line was extended from Hässelby gård to Hässelby strand.", "tier": "secondary", "title": "Green line (Stockholm metro) - Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_line_(Stockholm_metro)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251229224231/https://sv.wikipedia.org/wiki/Farsta_(tunnelbanestation)", "kind": "wikipedia", "title": "Farsta (tunnelbanestation) — Wikipedia (sv) (Hökarängen–Farsta 1958)", "url": "https://sv.wikipedia.org/wiki/Farsta_(tunnelbanestation)" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "stockholm-18", "id": "stockholm-green-farstastrand-1971", "kind": "extension", "label": { "en": "South terminus: Farsta → Farsta strand" }, "opened": "1971-08-29", "segment": { "fromStopIndex": 33, "toStopIndex": 34 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260311142027/https://en.wikipedia.org/wiki/Green_line_(Stockholm_Metro)", "kind": "wikipedia", "quote": "On Sunday August 29, 1971, the line was extended from Farsta to Farsta strand.", "tier": "secondary", "title": "Green line (Stockholm metro) - Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_line_(Stockholm_metro)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20250927225119/https://sv.wikipedia.org/wiki/Farsta_strand_(tunnelbanestation)", "kind": "wikipedia", "title": "Farsta strand (tunnelbanestation) — Wikipedia (sv) (Farsta–Farsta strand 29 Aug 1971)", "url": "https://sv.wikipedia.org/wiki/Farsta_strand_(tunnelbanestation)" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260311142027/https://en.wikipedia.org/wiki/Green_line_(Stockholm_Metro)", "kind": "wikipedia", "tier": "tertiary", "title": "Green line (Stockholm metro) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_line_(Stockholm_metro)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251230044632/https://sv.wikipedia.org/wiki/Gr%C3%B6na_linjen_(Stockholms_tunnelbana)", "kind": "wikipedia", "tier": "tertiary", "title": "Gröna linjen (Stockholms tunnelbana) — Wikipedia (sv)", "url": "https://sv.wikipedia.org/wiki/Gr%C3%B6na_linjen_(Stockholms_tunnelbana)" } ] }, { "cityId": "stockholm", "color": "#4e9d45", "displayNumber": "19", "id": "stockholm-line-19", "name": { "en": "Green Line 19 (Hässelby strand ↔ Hagsätra)", "sv": "Gröna linjen 19" }, "phases": [ { "confidence": "medium", "geometryRef": "stockholm-19", "id": "stockholm-green-hagsatra-1951", "kind": "extension", "label": { "en": "Hagsätra branch: Gullmarsplan → Högdalen (1951–54)" }, "opened": "1951-09-09", "segment": { "from": [ 18.0808, 59.2983 ], "to": [ 18.044, 59.265 ] }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260311142027/https://en.wikipedia.org/wiki/Green_line_(Stockholm_Metro)", "kind": "wikipedia", "quote": "On Sunday September 9, 1951, the branch from Gullmarsplan to Stureby opened, largely using the rebuilt route of tram route 19.", "tier": "secondary", "title": "Green line (Stockholm metro) - Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_line_(Stockholm_metro)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251230044632/https://sv.wikipedia.org/wiki/Gr%C3%B6na_linjen_(Stockholms_tunnelbana)", "kind": "wikipedia", "title": "Gröna linjen — Wikipedia (sv) (Gullmarsplan–Stureby 1951, –Högdalen 1954)", "url": "https://sv.wikipedia.org/wiki/Gr%C3%B6na_linjen_(Stockholms_tunnelbana)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20251230044632/https://sv.wikipedia.org/wiki/Gr%C3%B6na_linjen_(Stockholms_tunnelbana)", "kind": "other", "publisher": "Wikipedia (Swedish)", "quote": "9 september 1951", "tier": "secondary", "title": "Gröna linjen (Stockholms tunnelbana) — Wikipedia (sv)", "url": "https://sv.wikipedia.org/wiki/Gröna_linjen_(Stockholms_tunnelbana)", "via": "https://en.wikipedia.org/wiki/Green_line_(Stockholm_Metro)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613164426/https://www.urbanrail.net/eu/se/stockholm/stockhlm.htm", "kind": "other", "publisher": "urbanrail.net (Robert Schwandl)", "quote": "09 Sept 1951: Gullmarsplan - Stureby Green Line (South)", "tier": "tertiary", "title": "Stockholm — urbanrail.net", "url": "http://www.urbanrail.net/eu/se/stockholm/stockhlm.htm", "via": "https://en.wikipedia.org/wiki/Hags%C3%A4tra_metro_station" } ], "stationCount": 6 }, { "confidence": "medium", "geometryRef": "stockholm-19", "id": "stockholm-green-hagsatra-1960", "kind": "extension", "label": { "en": "Hagsätra branch completed: Högdalen → Hagsätra (via Rågsved)" }, "notes": "[Opening-date chase 2026-06-13] Swedish Hagsatra station article confirms the 1 Dec 1960 opening was revenue service: the inaugural train (premiartag) departed Hagsatra at 15:38 — first revenue train, not a separate ceremonial run.", "opened": "1960-12-01", "segment": { "from": [ 18.044, 59.265 ], "to": [ 18.0122, 59.2622 ] }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20251216121453/https://en.wikipedia.org/wiki/Hags%C3%A4tra_metro_station", "kind": "wikipedia", "quote": "was inaugurated on 1 December 1960 when one-station extension from Rågsved was completed", "tier": "secondary", "title": "Hagsätra metro station - Wikipedia", "url": "https://en.wikipedia.org/wiki/Hags%C3%A4tra_metro_station" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20250927225037/https://sv.wikipedia.org/wiki/Hags%C3%A4tra_(tunnelbanestation)", "kind": "wikipedia", "title": "Hagsätra (tunnelbanestation) — Wikipedia (sv) (Rågsved–Hagsätra 1 Dec 1960)", "url": "https://sv.wikipedia.org/wiki/Hags%C3%A4tra_(tunnelbanestation)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613164426/https://www.urbanrail.net/eu/se/stockholm/stockhlm.htm", "kind": "other", "publisher": "urbanrail.net (Robert Schwandl)", "quote": "01 Dec 1960: Rögsvéd - Hagsätra Green Line", "tier": "tertiary", "title": "Stockholm — urbanrail.net", "url": "http://www.urbanrail.net/eu/se/stockholm/stockhlm.htm", "via": "https://en.wikipedia.org/wiki/Hags%C3%A4tra_metro_station" } ], "stationCount": 2 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20250927225037/https://sv.wikipedia.org/wiki/Hags%C3%A4tra_(tunnelbanestation)", "kind": "wikipedia", "tier": "tertiary", "title": "Hagsätra (tunnelbanestation) — Wikipedia (sv)", "url": "https://sv.wikipedia.org/wiki/Hags%C3%A4tra_(tunnelbanestation)" } ] }, { "cityId": "stockholm", "color": "#4e9d45", "displayNumber": "17", "id": "stockholm-line-17", "name": { "en": "Green Line 17 (Hässelby strand ↔ Skarpnäck)", "sv": "Gröna linjen 17" }, "phases": [ { "confidence": "low", "geometryRef": "stockholm-17", "id": "stockholm-green-bagarmossen-1958", "kind": "extension", "label": { "en": "Bagarmossen branch: Gullmarsplan → Bagarmossen" }, "notes": "[Opening-date chase 2026-06-13] Ceremonial inauguration was 18 Nov 1958 (invited-guests invigningstag); revenue service to Bagarmossen opened the following morning, 19 Nov 1958 at 05:00.", "opened": "1958-11-18", "segment": { "from": [ 18.0808, 59.2983 ], "to": [ 18.1314, 59.2761 ] }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260311142027/https://en.wikipedia.org/wiki/Green_line_(Stockholm_Metro)", "kind": "wikipedia", "quote": "November 18 - Three extensions: Hammarbyhöjden to Bagarmossen, Hökarängen to Farsta, and Hässelby gård to Hässelby strand.", "tier": "secondary", "title": "Green line (Stockholm metro) – Wikipedia", "url": "https://en.wikipedia.org/wiki/Green_line_(Stockholm_metro)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251210115914/https://sv.wikipedia.org/wiki/Bagarmossen_(tunnelbanestation)", "kind": "wikipedia", "title": "Bagarmossen (tunnelbanestation) — Wikipedia (sv) (Skärmarbrink–Bagarmossen corridor 1958)", "url": "https://sv.wikipedia.org/wiki/Bagarmossen_(tunnelbanestation)" } ], "stationCount": 4 }, { "confidence": "low", "constructionStart": "1990", "geometryRef": "stockholm-17", "id": "stockholm-green-skarpnack-1994", "kind": "extension", "label": { "en": "Skarpnäck extension: Bagarmossen → Skarpnäck (system's 100th station)" }, "notes": "[Date chase 2026-06-12] Primary source (BK-Dagen 1992 paper, Stockholms gatukontor/SL): Skanska/Stabilator appointed contractor autumn 1989; structural works ran to autumn 1992; permanent reinforcement of Skarpnäck station began before Christmas 1990. Best-supported construction-start year is 1990 (contractor appointment autumn 1989 suggests blasting may have begun late 1989/early 1990). The chased PDF has via=\"\" and supportsDate=\"no\", so it is not attached as an accepted source despite being the contradicting primary evidence. [Corrected 2026-06-12 after date chase] Construction start corrected 1991→1990: BK-Dagen 1992 engineering conference paper (Stockholms gatukontor/SL) shows Skarpnäck station works underway before Christmas 1990. Panel-confirmed.", "opened": "1994-08-15", "segment": { "from": [ 18.1314, 59.2761 ], "to": [ 18.1333, 59.2668 ] }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20251210115914/https://sv.wikipedia.org/wiki/Bagarmossen_(tunnelbanestation)", "kind": "wikipedia", "quote": "Stationen var ändstation för linje 17 fram till 8 juli 1994 ... 15 augusti 1994 ... förlängningen av tunnelbanan till Skarpnäck", "tier": "secondary", "title": "Bagarmossen (tunnelbanestation) – Wikipedia", "url": "https://sv.wikipedia.org/wiki/Bagarmossen_(tunnelbanestation)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260203192456/https://sv.wikipedia.org/wiki/Skarpn%C3%A4ck_(tunnelbanestation)", "kind": "wikipedia", "title": "Skarpnäck (tunnelbanestation) — Wikipedia (sv) (Bagarmossen–Skarpnäck opened 15 Aug 1994)", "url": "https://sv.wikipedia.org/wiki/Skarpn%C3%A4ck_(tunnelbanestation)" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260203192456/https://sv.wikipedia.org/wiki/Skarpn%C3%A4ck_(tunnelbanestation)", "kind": "wikipedia", "tier": "tertiary", "title": "Skarpnäck (tunnelbanestation) — Wikipedia (sv)", "url": "https://sv.wikipedia.org/wiki/Skarpn%C3%A4ck_(tunnelbanestation)" } ] }, { "cityId": "stockholm", "color": "#d4202a", "displayNumber": "13", "id": "stockholm-line-13", "name": { "en": "Red Line 13 (Norsborg ↔ Ropsten)", "sv": "Röda linjen 13" }, "phases": [ { "confidence": "low", "geometryRef": "stockholm-13", "id": "stockholm-red-1964", "kind": "initial", "label": { "en": "Red line opens: T-Centralen → Örnsberg (central trunk + SW)" }, "opened": "1964-04-05", "segment": { "fromStopIndex": 11, "toStopIndex": 19 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20251224191619/https://en.wikipedia.org/wiki/Line_13_(Stockholm_metro)", "kind": "wikipedia", "quote": "\"Örnsberg–T-Centralen–Fruängen\" section opened on \"Sunday April 5, 1964\"", "tier": "secondary", "title": "Red line (Stockholm Metro) – Wikipedia", "url": "https://en.wikipedia.org/wiki/Line_13_(Stockholm_metro)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260101091700/https://en.wikipedia.org/wiki/Red_line_(Stockholm_metro)", "kind": "wikipedia", "title": "Red line (Stockholm Metro) — Wikipedia (opened 5 Apr 1964 to Fruängen/Örnsberg)", "url": "https://en.wikipedia.org/wiki/Red_line_(Stockholm_Metro)" } ], "stationCount": 8 }, { "confidence": "low", "geometryRef": "stockholm-13", "id": "stockholm-red-ostermalm-1965", "kind": "extension", "label": { "en": "NE: T-Centralen → Östermalmstorg; SW: Örnsberg → Sätra" }, "opened": "1965-05-16", "segment": { "fromStopIndex": 8, "toStopIndex": 11 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20251224191619/https://en.wikipedia.org/wiki/Line_13_(Stockholm_metro)", "kind": "wikipedia", "quote": "Two extensions: \"T-Centralen–Östermalmstorg\" and \"Örnsberg–Sätra\" both opened Sunday [May 16, 1965]", "tier": "secondary", "title": "Red line (Stockholm Metro) – Wikipedia", "url": "https://en.wikipedia.org/wiki/Line_13_(Stockholm_metro)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260101091700/https://en.wikipedia.org/wiki/Red_line_(Stockholm_metro)", "kind": "wikipedia", "title": "Red line (Stockholm Metro) — Wikipedia (Östermalmstorg & Sätra opened 16 May 1965)", "url": "https://en.wikipedia.org/wiki/Red_line_(Stockholm_Metro)" } ], "stationCount": 4 }, { "confidence": "low", "geometryRef": "stockholm-13", "id": "stockholm-red-ropsten-1967", "kind": "extension", "label": { "en": "NE terminus: Östermalmstorg → Ropsten" }, "opened": "1967-09-02", "segment": { "fromStopIndex": 19, "toStopIndex": 23 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20251224191619/https://en.wikipedia.org/wiki/Line_13_(Stockholm_metro)", "kind": "wikipedia", "quote": "September 2, 1967: \"Östermalmstorg–Ropsten\" opened Saturday (northern branch).", "tier": "secondary", "title": "Red line (Stockholm Metro) – Wikipedia", "url": "https://en.wikipedia.org/wiki/Line_13_(Stockholm_metro)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260101091700/https://en.wikipedia.org/wiki/Red_line_(Stockholm_metro)", "kind": "wikipedia", "title": "Red line (Stockholm Metro) — Wikipedia (Östermalmstorg–Ropsten 2 Sep 1967)", "url": "https://en.wikipedia.org/wiki/Red_line_(Stockholm_Metro)" } ], "stationCount": 3 }, { "confidence": "medium", "geometryRef": "stockholm-13", "id": "stockholm-red-varberg-1967", "kind": "extension", "label": { "en": "SW: Sätra → Vårberg (Skärholmen 1967)" }, "notes": "[Opening-date chase 2026-06-13] Partial-then-full corridor: Sätra–Skärholmen opened 1967-03-01; Skärholmen–Vårberg (completing the Sätra->Vårberg segment) opened 1967-12-02. Curated date is the Vårberg terminus opening.", "opened": "1967-12-02", "segment": { "fromStopIndex": 6, "toStopIndex": 8 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20251224191619/https://en.wikipedia.org/wiki/Line_13_(Stockholm_metro)", "kind": "wikipedia", "quote": "December 2, 1967: \"Skärholmen-Vårberg\" opened Saturday.", "tier": "secondary", "title": "Red line (Stockholm Metro) – Wikipedia", "url": "https://en.wikipedia.org/wiki/Line_13_(Stockholm_metro)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260101091700/https://en.wikipedia.org/wiki/Red_line_(Stockholm_metro)", "kind": "wikipedia", "title": "Red line (Stockholm Metro) — Wikipedia (Skärholmen 1 Mar 1967, Vårberg 2 Dec 1967)", "url": "https://en.wikipedia.org/wiki/Red_line_(Stockholm_Metro)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613164420/https://en.wikipedia.org/wiki/Sk%C3%A4rholmen_metro_station", "kind": "other", "publisher": "Wikipedia", "quote": "The station opened on 1 March 1967 as the southern terminus of an extension from Sätra", "tier": "secondary", "title": "Skärholmen metro station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Skärholmen_metro_station", "via": "https://en.wikipedia.org/wiki/Line_13_(Stockholm_metro)" } ], "stationCount": 2 }, { "confidence": "low", "geometryRef": "stockholm-13", "id": "stockholm-red-fittja-1972", "kind": "extension", "label": { "en": "SW: Vårberg → Fittja" }, "opened": "1972-10-01", "segment": { "fromStopIndex": 3, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20251224191619/https://en.wikipedia.org/wiki/Line_13_(Stockholm_metro)", "kind": "wikipedia", "quote": "October 1, 1972: \"Vårberg–Fittja\" opened Sunday.", "tier": "secondary", "title": "Red line (Stockholm Metro) – Wikipedia", "url": "https://en.wikipedia.org/wiki/Line_13_(Stockholm_metro)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260101091700/https://en.wikipedia.org/wiki/Red_line_(Stockholm_metro)", "kind": "wikipedia", "title": "Red line (Stockholm Metro) — Wikipedia (Vårberg–Fittja 1 Oct 1972)", "url": "https://en.wikipedia.org/wiki/Red_line_(Stockholm_Metro)" } ], "stationCount": 3 }, { "confidence": "low", "geometryRef": "stockholm-13", "id": "stockholm-red-norsborg-1975", "kind": "extension", "label": { "en": "SW terminus (Botkyrkabanan): Fittja → Norsborg" }, "opened": "1975-01-12", "segment": { "fromStopIndex": 0, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20250927225119/https://sv.wikipedia.org/wiki/Norsborg_(tunnelbanestation)", "kind": "wikipedia", "quote": "Stationen togs i bruk den 12 januari 1975 när sträckan Fittja–Norsborg invigdes.", "tier": "secondary", "title": "Norsborg (tunnelbanestation) — Wikipedia (sv) (Fittja–Norsborg 12 Jan 1975)", "url": "https://sv.wikipedia.org/wiki/Norsborg_(tunnelbanestation)" } ], "stationCount": 3 }, { "confidence": "low", "geometryRef": null, "id": "stockholm-red-renumber-2004", "kind": "renumber", "label": { "en": "Renumbering: line 23 (Norsborg – Ropsten) becomes line 13" }, "notes": "Service renumbering only — no new track or stations; the line’s route was unchanged. Reflects SL’s metro line-number scheme. [Opening-date chase 2026-06-13] Renumbering year is approximate ('omkring 2004'); no exact date or primary (operator) source located.", "opened": "2004", "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260116133256/https://sv.wikipedia.org/wiki/R%C3%B6da_linjen_(Stockholms_tunnelbana)", "kind": "wikipedia", "quote": "Linjen mellan Norsborg och Ropsten och omvänt hette tidigare linje 23, men bytte till nummer 13 omkring 2004", "tier": "secondary", "title": "Röda linjen (Stockholms tunnelbana) – Wikipedia", "url": "https://sv.wikipedia.org/wiki/R%C3%B6da_linjen_(Stockholms_tunnelbana)" } ] } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260101091700/https://en.wikipedia.org/wiki/Red_line_(Stockholm_metro)", "kind": "wikipedia", "tier": "tertiary", "title": "Red line (Stockholm Metro) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Red_line_(Stockholm_Metro)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260116133256/https://sv.wikipedia.org/wiki/R%C3%B6da_linjen_(Stockholms_tunnelbana)", "kind": "wikipedia", "tier": "tertiary", "title": "Röda linjen (Stockholms tunnelbana) — Wikipedia (sv)", "url": "https://sv.wikipedia.org/wiki/R%C3%B6da_linjen_(Stockholms_tunnelbana)" } ] }, { "cityId": "stockholm", "color": "#d4202a", "displayNumber": "14", "id": "stockholm-line-14", "name": { "en": "Red Line 14 (Fruängen ↔ Mörby centrum)", "sv": "Röda linjen 14" }, "phases": [ { "confidence": "high", "geometryRef": "stockholm-14", "id": "stockholm-red-fruangen-1964", "kind": "initial", "label": { "en": "Red line opens: Fruängen → Liljeholmen (SW branch)" }, "opened": "1964-04-05", "segment": { "fromStopIndex": 0, "toStopIndex": 5 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260101091700/https://en.wikipedia.org/wiki/Red_line_(Stockholm_metro)", "kind": "wikipedia", "quote": "April 5, 1964: \"Örnsberg–T-Centralen–Fruängen\" section opened, establishing the foundational southwest-to-center connection.", "tier": "secondary", "title": "Red line (Stockholm metro) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Red_line_(Stockholm_metro)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260101091700/https://en.wikipedia.org/wiki/Red_line_(Stockholm_metro)", "kind": "wikipedia", "title": "Red line (Stockholm Metro) — Wikipedia (T-Centralen–Fruängen opened 5 Apr 1964)", "url": "https://en.wikipedia.org/wiki/Red_line_(Stockholm_Metro)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613164426/https://www.urbanrail.net/eu/se/stockholm/stockhlm.htm", "kind": "other", "publisher": "UrbanRail.Net (Robert Schwandl)", "quote": "05 Apr 1964: T-Centralen - Fruängen Red Line [and] Liljeholmen - Örnsberg Red Line", "tier": "secondary", "title": "Stockholm — UrbanRail.Net", "url": "http://www.urbanrail.net/eu/se/stockholm/stockhlm.htm", "via": "https://en.wikipedia.org/wiki/Red_line_(Stockholm_Metro)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613164325/https://sparvagsmuseet.se/historien-om-tunnelbanan/", "kind": "primary", "publisher": "Spårvägsmuseet (Stockholm Transport Museum)", "quote": "April 5, 1964: First section inaugurated; \"en efterlängtad händelse för många söderortsbor\"", "tier": "primary", "title": "Historien om tunnelbanan — Spårvägsmuseet", "url": "https://sparvagsmuseet.se/historien-om-tunnelbanan/", "via": "https://en.wikipedia.org/wiki/Red_line_(Stockholm_Metro)" } ], "stationCount": 5 }, { "confidence": "medium", "geometryRef": "stockholm-14", "id": "stockholm-red-tekniska-1973", "kind": "extension", "label": { "en": "NE (Täbybanan stage 1): Östermalmstorg → Tekniska högskolan" }, "opened": "1973-09-30", "segment": { "fromStopIndex": 11, "toStopIndex": 14 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260108063944/https://en.wikipedia.org/wiki/Tekniska_h%C3%B6gskolan_metro_station", "kind": "wikipedia", "quote": "The station was opened on 30 September 1973 as the northern terminus of the extension from Östermalmstorg metro station.", "tier": "secondary", "title": "Tekniska högskolan metro station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Tekniska_h%C3%B6gskolan_metro_station" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260111112653/https://sv.wikipedia.org/wiki/Tekniska_h%C3%B6gskolan_(tunnelbanestation)", "kind": "wikipedia", "title": "Tekniska högskolan (tunnelbanestation) — Wikipedia (sv) (opened 30 Sep 1973)", "url": "https://sv.wikipedia.org/wiki/Tekniska_h%C3%B6gskolan_(tunnelbanestation)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613164426/https://www.urbanrail.net/eu/se/stockholm/stockhlm.htm", "kind": "other", "publisher": "UrbanRail.Net (Robert Schwandl)", "quote": "30 Sept 1973: Östermalmstorg - Tekniska Högskolan Red Line", "tier": "secondary", "title": "Stockholm — UrbanRail.Net", "url": "http://www.urbanrail.net/eu/se/stockholm/stockhlm.htm", "via": "https://en.wikipedia.org/wiki/Tekniska_h%C3%B6gskolan_metro_station" } ], "stationCount": 2 }, { "confidence": "medium", "geometryRef": "stockholm-14", "id": "stockholm-red-universitetet-1975", "kind": "extension", "label": { "en": "NE: Tekniska högskolan → Universitetet" }, "opened": "1975-01-12", "segment": { "fromStopIndex": 14, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260108063944/https://en.wikipedia.org/wiki/Tekniska_h%C3%B6gskolan_metro_station", "kind": "wikipedia", "quote": "On 12 January 1975, the line was extended further north to Universitetet.", "tier": "secondary", "title": "Tekniska högskolan metro station — Wikipedia", "url": "https://en.wikipedia.org/wiki/Tekniska_h%C3%B6gskolan_metro_station" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260101091700/https://en.wikipedia.org/wiki/Red_line_(Stockholm_metro)", "kind": "wikipedia", "title": "Red line (Stockholm Metro) — Wikipedia (Tekniska högskolan–Universitetet 12 Jan 1975)", "url": "https://en.wikipedia.org/wiki/Red_line_(Stockholm_Metro)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613164426/https://www.urbanrail.net/eu/se/stockholm/stockhlm.htm", "kind": "other", "publisher": "UrbanRail.Net (Robert Schwandl)", "quote": "12 Jan 1975: Tekniska Högskolan - Universitetet Red Line", "tier": "secondary", "title": "Stockholm — UrbanRail.Net", "url": "http://www.urbanrail.net/eu/se/stockholm/stockhlm.htm", "via": "https://en.wikipedia.org/wiki/Tekniska_h%C3%B6gskolan_metro_station" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "stockholm-14", "id": "stockholm-red-morby-1978", "kind": "extension", "label": { "en": "NE terminus: Universitetet → Mörby centrum" }, "opened": "1978-01-29", "segment": { "fromStopIndex": 15, "toStopIndex": 18 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260613164535/https://en.wikipedia.org/wiki/M%C3%B6rby_centrum_metro_station", "kind": "wikipedia", "quote": "The station was inaugurated on 29 January 1978 as the northern terminus of the extension from Universitetet.", "tier": "secondary", "title": "Mörby centrum metro station — Wikipedia", "url": "https://en.wikipedia.org/wiki/M%C3%B6rby_centrum_metro_station" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260509225406/https://sparvagsmuseet.se/historien-om-tunnelbanan/", "kind": "other", "title": "Historien om tunnelbanan — Spårvägsmuseet (Mörby centrum opened 29 Jan 1978)", "url": "https://sparvagsmuseet.se/historien-om-tunnelbanan/" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613164426/https://www.urbanrail.net/eu/se/stockholm/stockhlm.htm", "kind": "other", "publisher": "UrbanRail.Net (Robert Schwandl)", "quote": "29 Jan 1978: Universitetet - Mörby Centrum Red Line", "tier": "secondary", "title": "Stockholm — UrbanRail.Net", "url": "http://www.urbanrail.net/eu/se/stockholm/stockhlm.htm", "via": "https://en.wikipedia.org/wiki/M%C3%B6rby_centrum_metro_station" } ], "stationCount": 3 }, { "confidence": "low", "geometryRef": null, "id": "stockholm-red-renumber-2001", "kind": "renumber", "label": { "en": "Renumbering: line 24 (Fruängen – Mörby centrum) becomes line 14" }, "notes": "Service renumbering only — no new track or stations; the line’s route was unchanged. Reflects SL’s metro line-number scheme. [Opening-date chase 2026-06-13] Administrative renumbering (line 24 → 14), not a revenue-service opening. Only Wikipedia attests it, with the qualifier 'around 2001' and no inline citation; year is approximate. Spårvägsmuseet and UrbanRail.Net do not mention the number change.", "opened": "2001", "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260101091700/https://en.wikipedia.org/wiki/Red_line_(Stockholm_metro)", "kind": "wikipedia", "quote": "originally numbered line 24, but was renumbered 14 around 2001", "tier": "secondary", "title": "Red line (Stockholm metro) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Red_line_(Stockholm_metro)" } ] }, { "confidence": "high", "geometryRef": "stockholm-14", "id": "stockholm-14-1964-shared-6", "kind": "extension", "label": { "en": "Shared section (track opened with line 13)" }, "notes": "Runs over track that opened with line 13 on 1964-04-05; attributed here for map continuity (no separate cost, to avoid double-counting shared infrastructure).", "opened": "1964-04-05", "segment": { "fromStopIndex": 5, "toStopIndex": 11 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20251224191619/https://en.wikipedia.org/wiki/Line_13_(Stockholm_metro)", "kind": "wikipedia", "quote": "\"Örnsberg–T-Centralen–Fruängen\" section opened on \"Sunday April 5, 1964\"", "tier": "secondary", "title": "Red line (Stockholm Metro) – Wikipedia", "url": "https://en.wikipedia.org/wiki/Line_13_(Stockholm_metro)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260101091700/https://en.wikipedia.org/wiki/Red_line_(Stockholm_metro)", "kind": "wikipedia", "title": "Red line (Stockholm Metro) — Wikipedia (opened 5 Apr 1964 to Fruängen/Örnsberg)", "url": "https://en.wikipedia.org/wiki/Red_line_(Stockholm_Metro)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613164426/https://www.urbanrail.net/eu/se/stockholm/stockhlm.htm", "kind": "other", "publisher": "UrbanRail.Net (Robert Schwandl)", "quote": "05 Apr 1964: T-Centralen - Fruängen Red Line [and] Liljeholmen - Örnsberg Red Line", "tier": "secondary", "title": "Stockholm — UrbanRail.Net", "url": "http://www.urbanrail.net/eu/se/stockholm/stockhlm.htm", "via": "https://en.wikipedia.org/wiki/Red_line_(Stockholm_Metro)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613164325/https://sparvagsmuseet.se/historien-om-tunnelbanan/", "kind": "primary", "publisher": "Spårvägsmuseet (Stockholm Transport Museum)", "quote": "April 5, 1964: First section inaugurated; \"en efterlängtad händelse för många söderortsbor\"", "tier": "primary", "title": "Historien om tunnelbanan — Spårvägsmuseet", "url": "https://sparvagsmuseet.se/historien-om-tunnelbanan/", "via": "https://en.wikipedia.org/wiki/Red_line_(Stockholm_Metro)" } ] } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260101091700/https://en.wikipedia.org/wiki/Red_line_(Stockholm_metro)", "kind": "wikipedia", "tier": "tertiary", "title": "Red line (Stockholm Metro) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Red_line_(Stockholm_Metro)" } ] }, { "cityId": "stockholm", "color": "#0094cd", "displayNumber": "10", "id": "stockholm-line-10", "name": { "en": "Blue Line 10 (Kungsträdgården ↔ Hjulsta)", "sv": "Blå linjen 10" }, "phases": [ { "confidence": "medium", "constructionStart": "1966", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "SEK", "isEstimate": true, "value": 1400000000, "year": 1975 }, "notes": "Figure is the total cost of the ENTIRE Blue line (lines 10 + 11 combined), ≈ 1.4 billion kr in 1975 prices — not line-10- or phase-specific. Recorded once on line 10’s trunk phase to avoid double-counting; line 11 carries no cost. No per-stage figure is published. [Citation chase 2026-06-11] The 1.4 billion SEK (1975 prices) figure explicitly EXCLUDES land acquisition costs (\"exklusive markförvärvskostnader\") and is sourced ultimately from the book \"Stockholms tunnelbanor 1975\" — quoted on a rail-enthusiast forum (postvagnen.com) and restated on Wikipedia; the phrasing indicates a reported total cost rather than a pre-construction estimate.", "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260101071329/https://sv.wikipedia.org/wiki/Bl%C3%A5_linjen_(Stockholms_tunnelbana)", "kind": "wikipedia", "title": "Blå linjen (Stockholms tunnelbana) — Wikipedia (sv) (≈1,4 mdr kr, 1975)", "url": "https://sv.wikipedia.org/wiki/Bl%C3%A5_linjen_(Stockholms_tunnelbana)" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20260613164536/https://www.postvagnen.com/", "kind": "other", "publisher": "postvagnen.com (rail enthusiast forum)", "quote": "Enligt boken \"Stockholms tunnelbanor 1975\" var kostnaden för den Blå linjen i 1975 års prisnivå cirka 1,4 miljarder kr exklusive markförvärvskostnader.", "tier": "secondary", "title": "Postvagnen forum — inlägg #558780 (archived 2015-09-24)", "url": "https://web.archive.org/web/20150924080523/http://www.postvagnen.com/forum/index.php?id=558780", "via": "https://sv.wikipedia.org/wiki/Bl%C3%A5_linjen_(Stockholms_tunnelbana)" } ] }, "geometryRef": "stockholm-10", "id": "stockholm-blue-trunk-1975", "kind": "initial", "label": { "en": "Blue line opens: Västra skogen → T-Centralen (trunk)" }, "notes": "[Date chase 2026-06-12] SV Blue Line article corroborates the 2 September 1966 groundbreaking ('Det första spadtaget togs den 2 september 1966'), though neither EN nor SV attaches an inline citation to this specific claim.", "opened": "1975-08-31", "segment": { "fromStopIndex": 8, "toStopIndex": 12 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260312180408/https://en.wikipedia.org/wiki/Blue_line_(Stockholm_Metro)", "kind": "wikipedia", "quote": "Groundbreaking occurred on 2 September 1966 and the line was opened nine years later on 31 August 1975, between T-Centralen and Hjulsta via Hallonbergen.", "tier": "tertiary", "title": "Blue line (Stockholm Metro) — Wikipedia (T-Centralen–Hjulsta opened 31 Aug 1975)", "url": "https://en.wikipedia.org/wiki/Blue_line_(Stockholm_Metro)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260312180408/https://en.wikipedia.org/wiki/Blue_line_(Stockholm_Metro)", "kind": "other", "publisher": "Wikipedia (EN)", "quote": "T-Centralen–Hallonbergen–Hjulsta: Sunday 31 August 1975", "tier": "tertiary", "title": "Blue line (Stockholm Metro) — Opening dates table", "url": "https://en.wikipedia.org/wiki/Blue_line_(Stockholm_Metro)#Opening_dates", "via": "https://en.wikipedia.org/wiki/Blue_line_(Stockholm_Metro)" } ], "stationCount": 4 }, { "confidence": "medium", "constructionStart": "1966", "geometryRef": "stockholm-10", "id": "stockholm-blue-hjulsta-1975", "kind": "extension", "label": { "en": "Blue line NW spur: Hjulsta → Rinkeby" }, "notes": "[Date chase 2026-06-12] Construction start (1966) is not singled out for the Hjulsta spur separately; it derives from the trunk-line groundbreaking of 2 September 1966 shared across the original Blue Line build. [Opening-date chase 2026-06-13] The 'NW spur Hjulsta→Rinkeby' label is slightly misleading: Rinkeby lay on the original 1975 Hallonbergen–Hjulsta route, so this segment opened simultaneously with the trunk on 31 Aug 1975, not as a later spur.", "opened": "1975-08-31", "segment": { "fromStopIndex": 0, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251225200538/https://en.wikipedia.org/wiki/Hjulsta_metro_station", "kind": "wikipedia", "quote": "The station was opened on 31 August 1975 as the northern terminus of the first stretch of the Blue Line from T-Centralen.", "tier": "tertiary", "title": "Hjulsta metro station — Wikipedia (opened 31 Aug 1975)", "url": "https://en.wikipedia.org/wiki/Hjulsta_metro_station" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260312180408/https://en.wikipedia.org/wiki/Blue_line_(Stockholm_Metro)", "kind": "other", "publisher": "Wikipedia (English)", "quote": "Groundbreaking occurred on 2 September 1966 and the line was opened nine years later on 31 August 1975, between T-Centralen and Hjulsta via Hallonbergen.", "tier": "secondary", "title": "Blue line (Stockholm Metro) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Blue_line_(Stockholm_Metro)", "via": "https://en.wikipedia.org/wiki/Blue_line_(Stockholm_Metro)" } ], "stationCount": 2 }, { "confidence": "medium", "geometryRef": "stockholm-10", "id": "stockholm-blue-kungstradgarden-1977", "kind": "extension", "label": { "en": "SE extension: T-Centralen → Kungsträdgården" }, "opened": "1977-10-30", "segment": { "fromStopIndex": 12, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251031131836/https://en.wikipedia.org/wiki/Kungstr%C3%A4dg%C3%A5rden_metro_station", "kind": "wikipedia", "quote": "It is the end station of line 10 and line 11, and was opened on 30 October 1977, as the 91st station and part of the one-station extension from T-Centralen.", "tier": "tertiary", "title": "Kungsträdgården metro station — Wikipedia (opened 30 Oct 1977)", "url": "https://en.wikipedia.org/wiki/Kungstr%C3%A4dg%C3%A5rden_metro_station" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260312180408/https://en.wikipedia.org/wiki/Blue_line_(Stockholm_Metro)", "kind": "other", "publisher": "Wikipedia (EN)", "quote": "T-Centralen–Kungsträdgården: Sunday 30 October 1977", "tier": "tertiary", "title": "Blue line (Stockholm Metro) — Opening dates table", "url": "https://en.wikipedia.org/wiki/Blue_line_(Stockholm_Metro)#Opening_dates", "via": "https://en.wikipedia.org/wiki/Blue_line_(Stockholm_Metro)" } ], "stationCount": 1 }, { "confidence": "medium", "constructionStart": "1980", "geometryRef": "stockholm-10", "id": "stockholm-blue-vastraskogen-1985", "kind": "extension", "label": { "en": "Line 10 rerouted via Sundbyberg: Rinkeby → Västra skogen" }, "notes": "[Date chase 2026-06-12] No Wikipedia source confirms the 1980 construction start; a primary source (SL / Spårvägar i Stockholm historical records) would be needed to substantiate it. [Opening-date chase 2026-06-13] SV wiki names the eastern endpoint 'Rissne' while EN names it 'Rinkeby'; these are adjacent stations on the same section opened together, so the year/date is consistent.", "opened": "1985-08-19", "segment": { "fromStopIndex": 2, "toStopIndex": 8 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260312180408/https://en.wikipedia.org/wiki/Blue_line_(Stockholm_Metro)", "kind": "wikipedia", "quote": "The next section opened, on 19 August 1985, was between Västra skogen and Rinkeby via Sundbybergs centrum. At that time, line 10 was diverted over this section, and no more passenger trains operated on the Hallonbergen–Rinkeby section.", "tier": "tertiary", "title": "Blue line (Stockholm Metro) - Wikipedia", "url": "https://en.wikipedia.org/wiki/Blue_line_(Stockholm_Metro)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260101071329/https://sv.wikipedia.org/wiki/Bl%C3%A5_linjen_(Stockholms_tunnelbana)", "kind": "wikipedia", "title": "Blå linjen (Stockholms tunnelbana) — Wikipedia (sv) (Västra skogen–Rissne, line 10 rerouted 19 Aug 1985)", "url": "https://sv.wikipedia.org/wiki/Bl%C3%A5_linjen_(Stockholms_tunnelbana)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260312180408/https://en.wikipedia.org/wiki/Blue_line_(Stockholm_Metro)", "kind": "other", "publisher": "Wikipedia (EN)", "quote": "Västra skogen–Sundbybergs centrum–Rinkeby: Monday 19 August 1985", "tier": "tertiary", "title": "Blue line (Stockholm Metro) — Opening dates table", "url": "https://en.wikipedia.org/wiki/Blue_line_(Stockholm_Metro)#Opening_dates", "via": "https://en.wikipedia.org/wiki/Blue_line_(Stockholm_Metro)" } ], "stationCount": 5 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260312180408/https://en.wikipedia.org/wiki/Blue_line_(Stockholm_Metro)", "kind": "wikipedia", "tier": "tertiary", "title": "Blue line (Stockholm Metro) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Blue_line_(Stockholm_Metro)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260101071329/https://sv.wikipedia.org/wiki/Bl%C3%A5_linjen_(Stockholms_tunnelbana)", "kind": "wikipedia", "tier": "tertiary", "title": "Blå linjen (Stockholms tunnelbana) — Wikipedia (sv)", "url": "https://sv.wikipedia.org/wiki/Bl%C3%A5_linjen_(Stockholms_tunnelbana)" } ] }, { "cityId": "stockholm", "color": "#0094cd", "displayNumber": "11", "id": "stockholm-line-11", "name": { "en": "Blue Line 11 (Kungsträdgården ↔ Akalla)", "sv": "Blå linjen 11" }, "phases": [ { "confidence": "low", "constructionStart": "1966", "geometryRef": "stockholm-11", "id": "stockholm-blue-hallonbergen-1975", "kind": "initial", "label": { "en": "Blue line 1975 route: Västra skogen → Hallonbergen" }, "notes": "[Date chase 2026-06-12] Groundbreaking precisely dated 2 September 1966 by both EN and SV Wikipedia; the 1966-1975 span matches the articles' 'nine years later' framing. No inline refs attached to the groundbreaking sentence, so no further primary/news sources were chasable.", "opened": "1975-08-31", "segment": { "fromStopIndex": 3, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260312180408/https://en.wikipedia.org/wiki/Blue_line_(Stockholm_Metro)", "kind": "wikipedia", "quote": "Groundbreaking occurred on 2 September 1966 and the line was opened nine years later on 31 August 1975, between T-Centralen and Hjulsta via Hallonbergen.", "tier": "secondary", "title": "Blue line (Stockholm Metro) - Wikipedia", "url": "https://en.wikipedia.org/wiki/Blue_line_(Stockholm_Metro)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260101071329/https://sv.wikipedia.org/wiki/Bl%C3%A5_linjen_(Stockholms_tunnelbana)", "kind": "wikipedia", "title": "Blå linjen (Stockholms tunnelbana) — Wikipedia (sv) (1975 opening via Hallonbergen)", "url": "https://sv.wikipedia.org/wiki/Bl%C3%A5_linjen_(Stockholms_tunnelbana)" } ], "stationCount": 3 }, { "confidence": "low", "geometryRef": "stockholm-11", "id": "stockholm-blue-akalla-1977", "kind": "extension", "label": { "en": "NW terminus: Hallonbergen → Akalla (via Kista)" }, "opened": "1977-06-05", "segment": { "fromStopIndex": 0, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-06-05", "archivedUrl": "https://web.archive.org/web/20260312180408/https://en.wikipedia.org/wiki/Blue_line_(Stockholm_Metro)", "kind": "wikipedia", "quote": "On 5 June 1977, the branch from Hallonbergen to Akalla opened.", "tier": "secondary", "title": "Blue line (Stockholm Metro) - Wikipedia", "url": "https://en.wikipedia.org/wiki/Blue_line_(Stockholm_Metro)" }, { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20251224064144/https://en.wikipedia.org/wiki/Akalla_metro_station", "kind": "wikipedia", "title": "Akalla metro station — Wikipedia (Hallonbergen–Akalla opened 5 Jun 1977)", "url": "https://en.wikipedia.org/wiki/Akalla_metro_station" } ], "stationCount": 3 } ], "sources": [ { "accessedAt": "2026-06-02", "archivedUrl": "https://web.archive.org/web/20260312180408/https://en.wikipedia.org/wiki/Blue_line_(Stockholm_Metro)", "kind": "wikipedia", "tier": "tertiary", "title": "Blue line (Stockholm Metro) — Wikipedia", "url": "https://en.wikipedia.org/wiki/Blue_line_(Stockholm_Metro)" } ] } ], "name": { "en": "Stockholm", "sv": "Stockholm" } }, { "bbox": [ 139.58, 35.55, 139.95, 35.83 ], "center": [ 139.7671, 35.6812 ], "country": "Japan", "defaultZoom": 11, "homeCurrency": "JPY", "id": "tokyo", "lines": [ { "cityId": "tokyo", "color": "#FF9500", "displayNumber": "G", "id": "tokyo-line-g", "name": { "en": "Ginza Line" }, "phases": [ { "confidence": "high", "constructionStart": "1925", "cost": { "basis": "outturn", "confidence": "low", "nominal": { "currency": "JPY", "isEstimate": false, "value": 42130000, "year": 1934 }, "notes": "This ¥42.13 million figure is the TOTAL construction cost of the ENTIRE Tokyo Underground Railway line Asakusa–Shimbashi (all 1927–1934 stages combined), NOT this Asakusa–Ueno segment alone. Construction began 27 Sep 1925; initial funding was ¥6.2 million raised toward a ¥35 million initial requirement (per EN Wikipedia / oldtokyo). Promoter Noritsugu Hayakawa originally estimated ~¥20 million was needed. [Citation chase 2026-06-11] The ¥42.13M total rests solely on JA Wikipedia citing the 1960 Teito book 東京地下鉄道丸ノ内線建設史 (上巻, pp.15–17), whose page content could not be read directly (interactive ebook viewer, effectively offline); no independent or primary source in the chase corroborates the figure. For scope: this covers the Tokyo Underground Railway's Asakusa–Shimbashi stretch; the Tokyo Rapid Railway's Shibuya–Shimbashi portion added ~¥21.26M, totaling ~¥63.39M for the complete present-day Ginza Line.", "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260331234412/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "kind": "wikipedia", "quote": "浅草駅 - 上野駅間：1927年12月30日開業（2.2 km）。東京地下鉄道が建設した浅草駅 - 新橋駅間の建設費用は、総額4,213万円であった。", "tier": "tertiary", "title": "東京メトロ銀座線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ銀座線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260519222108/https://metroarchive.jp/content/ginza.html/", "kind": "primary", "quote": "1927（昭和2）年12月30日 東洋初の地下鉄となる浅草〜上野間2.2kmが営業を開始", "tier": "primary", "title": "銀座線の歴史 — メトロアーカイブアルバム (Tokyo Metro)", "url": "https://metroarchive.jp/content/ginza.html/" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260328203648/https://en.wikipedia.org/wiki/Tokyo_Metro_Ginza_Line", "kind": "wikipedia", "quote": "Construction began on September 27, 1925 ... The portion between Ueno and Asakusa was completed on December 30, 1927.", "tier": "tertiary", "title": "Tokyo Metro Ginza Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Tokyo_Metro_Ginza_Line" } ] }, "geometryRef": "tokyo-G", "id": "tokyo-g-19271230", "kind": "initial", "label": { "en": "Initial section opens: Asakusa → Ueno (Tokyo Underground Railway — Asia's first subway)" }, "notes": "[Date chase 2026-06-12] Precise construction-start date is 1925-09-27 (groundbreaking for Asakusa–Ueno). Japan Times 2017 90th-anniversary article (cited in EN Wikipedia) is paywalled and could not be verified, but is not needed. [Opening-date chase 2026-06-13] Ceremonial opening and VIP/stakeholder test ride were held Dec 29, 1927; public revenue service began Dec 30, 1927 (the curated date).", "opened": "1927-12-30", "segment": { "fromStopIndex": 0, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260331234412/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "kind": "wikipedia", "quote": "浅草駅 - 上野駅間：1927年12月30日開業（2.2 km）。東京地下鉄道が建設した浅草駅 - 新橋駅間の建設費用は、総額4,213万円であった。", "tier": "tertiary", "title": "東京メトロ銀座線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ銀座線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260519222108/https://metroarchive.jp/content/ginza.html/", "kind": "primary", "quote": "1927（昭和2）年12月30日 東洋初の地下鉄となる浅草〜上野間2.2kmが営業を開始", "tier": "primary", "title": "銀座線の歴史 — メトロアーカイブアルバム (Tokyo Metro)", "url": "https://metroarchive.jp/content/ginza.html/" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260328203648/https://en.wikipedia.org/wiki/Tokyo_Metro_Ginza_Line", "kind": "wikipedia", "quote": "Construction began on September 27, 1925 ... The portion between Ueno and Asakusa was completed on December 30, 1927.", "tier": "tertiary", "title": "Tokyo Metro Ginza Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Tokyo_Metro_Ginza_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260331234412/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "kind": "other", "publisher": "Wikimedia Foundation", "quote": "12月29日：浅草駅 - 上野駅間の開通式および関係者による試乗。12月30日：浅草駅 - 上野駅間（2.2 km）開業", "tier": "tertiary", "title": "東京メトロ銀座線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "via": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A" } ], "stationCount": 2 }, { "confidence": "high", "geometryRef": "tokyo-G", "id": "tokyo-g-19300101", "kind": "extension", "label": { "en": "Extension: Ueno → Manseibashi (temporary terminus)" }, "opened": "1930-01-01", "segment": { "fromStopIndex": 3, "toStopIndex": 5 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260331234412/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "kind": "wikipedia", "quote": "1930年1月1日：上野 - 万世橋駅間開業（1.7 km）", "tier": "tertiary", "title": "東京メトロ銀座線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ銀座線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260328203648/https://en.wikipedia.org/wiki/Tokyo_Metro_Ginza_Line", "kind": "wikipedia", "quote": "On January 1, 1930, the subway was extended by 1.7 km to a temporary station at Manseibashi", "tier": "tertiary", "title": "Tokyo Metro Ginza Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Tokyo_Metro_Ginza_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260331234412/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "kind": "other", "publisher": "Wikimedia Foundation", "quote": "1930年（昭和5年）1月1日：上野駅 - 万世橋駅間（1.7 km）開業", "tier": "tertiary", "title": "東京メトロ銀座線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "via": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A" } ], "stationCount": 1 }, { "closed": "1931-11-21", "confidence": "high", "geometryRef": "tokyo-G", "id": "tokyo-g-19311121", "kind": "extension", "label": { "en": "Extension: Manseibashi → Kanda (Manseibashi temporary station closed)" }, "opened": "1931-11-21", "segment": { "fromStopIndex": 5, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260331234412/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "kind": "wikipedia", "quote": "1931年11月21日：万世橋 - 神田間開業（0.5 km）、万世橋駅廃止", "tier": "tertiary", "title": "東京メトロ銀座線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ銀座線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260328203648/https://en.wikipedia.org/wiki/Tokyo_Metro_Ginza_Line", "kind": "wikipedia", "quote": "the subway reached Kanda, 500 meters further south down the line ... Manseibashi ... was abandoned", "tier": "tertiary", "title": "Tokyo Metro Ginza Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Tokyo_Metro_Ginza_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260331234412/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "kind": "other", "publisher": "Wikimedia Foundation", "quote": "11月21日：万世橋駅 - 神田駅間（0.5 km）開業。万世橋駅は廃止", "tier": "tertiary", "title": "東京メトロ銀座線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "via": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A" } ], "stationCount": 1 }, { "confidence": "high", "geometryRef": "tokyo-G", "id": "tokyo-g-19320429", "kind": "extension", "label": { "en": "Extension: Kanda → Mitsukoshimae" }, "opened": "1932-04-29", "segment": { "fromStopIndex": 6, "toStopIndex": 7 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260331234412/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "kind": "wikipedia", "quote": "1932年4月29日：神田 - 三越前間開業（0.7 km）", "tier": "tertiary", "title": "東京メトロ銀座線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ銀座線" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260331234412/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "kind": "other", "publisher": "Wikimedia Foundation", "quote": "4月29日：神田 - 三越前間（0.7 km）開業", "tier": "tertiary", "title": "東京メトロ銀座線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "via": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A" } ], "stationCount": 1 }, { "confidence": "high", "geometryRef": "tokyo-G", "id": "tokyo-g-19321224", "kind": "extension", "label": { "en": "Extension: Mitsukoshimae → Kyobashi" }, "opened": "1932-12-24", "segment": { "fromStopIndex": 7, "toStopIndex": 9 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260331234412/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "kind": "wikipedia", "quote": "1932年12月24日：三越前 - 京橋間開業（1.3 km）", "tier": "tertiary", "title": "東京メトロ銀座線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ銀座線" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260331234412/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "kind": "other", "publisher": "Wikimedia Foundation", "quote": "12月24日：三越前 - 京橋間（1.3 km）開業", "tier": "tertiary", "title": "東京メトロ銀座線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "via": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A" } ], "stationCount": 1 }, { "confidence": "high", "geometryRef": "tokyo-G", "id": "tokyo-g-19340303", "kind": "extension", "label": { "en": "Extension: Kyobashi → Ginza" }, "opened": "1934-03-03", "segment": { "fromStopIndex": 9, "toStopIndex": 10 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260331234412/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "kind": "wikipedia", "quote": "1934年3月3日：京橋 - 銀座間開業（0.7 km）", "tier": "tertiary", "title": "東京メトロ銀座線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ銀座線" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260331234412/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "kind": "other", "publisher": "Wikimedia Foundation", "quote": "3月3日：京橋駅 - 銀座駅間（0.7 km）開業", "tier": "tertiary", "title": "東京メトロ銀座線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "via": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A" } ], "stationCount": 1 }, { "confidence": "high", "geometryRef": "tokyo-G", "id": "tokyo-g-19340621", "kind": "extension", "label": { "en": "Extension: Ginza → Shimbashi (Tokyo Underground Railway reaches its original planned terminus)" }, "opened": "1934-06-21", "segment": { "fromStopIndex": 10, "toStopIndex": 11 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260331234412/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "kind": "wikipedia", "quote": "1934年6月21日：銀座 - 新橋間開業（0.9 km）", "tier": "tertiary", "title": "東京メトロ銀座線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ銀座線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260328203648/https://en.wikipedia.org/wiki/Tokyo_Metro_Ginza_Line", "kind": "wikipedia", "quote": "the line finally reached its originally planned terminus of Shinbashi on June 21, 1934.", "tier": "tertiary", "title": "Tokyo Metro Ginza Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Tokyo_Metro_Ginza_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260331234412/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "kind": "other", "publisher": "Wikimedia Foundation", "quote": "6月21日：銀座駅 - 新橋駅間（0.9 km）開業", "tier": "tertiary", "title": "東京メトロ銀座線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "via": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A" } ], "stationCount": 1 }, { "confidence": "high", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "JPY", "isEstimate": false, "value": 21260000, "year": 1939 }, "notes": "This ¥21.26 million figure is the TOTAL construction cost of the ENTIRE Tokyo Rapid Railway line Shibuya–Shimbashi (all 1938–1939 stages combined), NOT this Aoyama-rokuchome–Toranomon segment alone. The Tokyo Rapid Railway (predecessor tied to today's Tokyu Corp.) built this western half; it later merged with Tokyo Underground Railway into the Teito Rapid Transit Authority (TRTA/Eidan) in July 1941. [Citation chase 2026-06-11] Basis: this is an actual final (outturn) total construction cost, sourced to the TRTA's 1960 retrospective \"丸ノ内線建設史（上巻）\" via JA Wikipedia; the cited primary volume is offline and could not be directly verified online.", "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260331234412/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "kind": "wikipedia", "quote": "1938年11月18日：青山六丁目（現・表参道）- 虎ノ門間開業（4.4 km）。東京高速鉄道が建設した渋谷駅 - 新橋駅間の建設費用は、総額2,126万円であった。", "tier": "tertiary", "title": "東京メトロ銀座線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ銀座線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260328203648/https://en.wikipedia.org/wiki/Tokyo_Metro_Ginza_Line", "kind": "wikipedia", "quote": "In 1938, a company tied to the predecessor of today's Tokyu Corporation, began service between Aoyama-rokuchome and Toranomon", "tier": "tertiary", "title": "Tokyo Metro Ginza Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Tokyo_Metro_Ginza_Line" } ] }, "geometryRef": "tokyo-G", "id": "tokyo-g-19381118", "kind": "extension", "label": { "en": "Tokyo Rapid Railway opens: Aoyama-rokuchome (now Omote-sando) → Toranomon" }, "notes": "[Opening-date chase 2026-06-13] Section opened operating as single-track parallel (単線並列運転) initially.", "opened": "1938-11-18", "segment": { "fromStopIndex": 11, "toStopIndex": 12 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260331234412/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "kind": "wikipedia", "quote": "1938年11月18日：青山六丁目（現・表参道）- 虎ノ門間開業（4.4 km）。東京高速鉄道が建設した渋谷駅 - 新橋駅間の建設費用は、総額2,126万円であった。", "tier": "tertiary", "title": "東京メトロ銀座線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ銀座線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260328203648/https://en.wikipedia.org/wiki/Tokyo_Metro_Ginza_Line", "kind": "wikipedia", "quote": "In 1938, a company tied to the predecessor of today's Tokyu Corporation, began service between Aoyama-rokuchome and Toranomon", "tier": "tertiary", "title": "Tokyo Metro Ginza Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Tokyo_Metro_Ginza_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260331234412/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "kind": "other", "publisher": "Wikimedia Foundation", "quote": "11月18日：青山六丁目駅（現・表参道駅） - 虎ノ門駅間（4.4 km）開業。単線並列運転", "tier": "tertiary", "title": "東京メトロ銀座線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "via": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A" } ], "stationCount": 7 }, { "confidence": "high", "geometryRef": "tokyo-G", "id": "tokyo-g-19381220", "kind": "extension", "label": { "en": "Tokyo Rapid Railway extension: Shibuya → Aoyama-rokuchome" }, "opened": "1938-12-20", "segment": { "fromStopIndex": 12, "toStopIndex": 18 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260331234412/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "kind": "wikipedia", "quote": "1938年12月20日：渋谷 - 青山六丁目間開業（1.1 km）", "tier": "tertiary", "title": "東京メトロ銀座線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ銀座線" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260331234412/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "kind": "other", "publisher": "Wikimedia Foundation", "quote": "12月20日：渋谷駅 - 青山六丁目駅間（1.1 km）開業。赤坂見附駅 - 虎ノ門駅間は単線運転", "tier": "tertiary", "title": "東京メトロ銀座線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "via": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A" } ], "stationCount": 1 }, { "confidence": "high", "geometryRef": "tokyo-G", "id": "tokyo-g-19390115", "kind": "extension", "label": { "en": "Tokyo Rapid Railway extension: Toranomon → Shimbashi (links to Tokyo Underground Railway at Shimbashi)" }, "notes": "[Opening-date chase 2026-06-13] Tokyo Rapid Railway's Shimbashi station opened separate from (west of) the existing Tokyo Underground Railway Shimbashi; the two merged at through-service start on 1939-09-16.", "opened": "1939-01-15", "segment": { "fromStopIndex": 11, "toStopIndex": 12 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260331234412/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "kind": "wikipedia", "quote": "1939年1月15日：虎ノ門 - 新橋間開業（0.7 km）", "tier": "tertiary", "title": "東京メトロ銀座線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ銀座線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260328203648/https://en.wikipedia.org/wiki/Tokyo_Metro_Ginza_Line", "kind": "wikipedia", "quote": "later extended to Shimbashi in 1939", "tier": "tertiary", "title": "Tokyo Metro Ginza Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Tokyo_Metro_Ginza_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260331234412/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "kind": "other", "publisher": "Wikimedia Foundation", "quote": "1月15日：虎ノ門駅 - 新橋駅間（0.7 km）開業", "tier": "tertiary", "title": "東京メトロ銀座線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "via": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A" } ], "stationCount": 1 }, { "confidence": "high", "geometryRef": null, "id": "tokyo-g-19390916", "kind": "extension", "label": { "en": "Through-service begins: Tokyo Underground Railway + Tokyo Rapid Railway operate as one line (Asakusa ↔ Shibuya)" }, "notes": "Through-service milestone — the unified Ginza Line; both halves were already built (1934/1939), so this is not a new track opening.", "opened": "1939-09-16", "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260331234412/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "kind": "wikipedia", "quote": "1939年9月16日：相互直通運転開始", "tier": "tertiary", "title": "東京メトロ銀座線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ銀座線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260519222108/https://metroarchive.jp/content/ginza.html/", "kind": "primary", "quote": "1939（昭和14）年9月16日 浅草〜渋谷間直通運転開始", "tier": "primary", "title": "銀座線の歴史 — メトロアーカイブアルバム (Tokyo Metro)", "url": "https://metroarchive.jp/content/ginza.html/" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260331234412/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "kind": "other", "publisher": "Wikimedia Foundation", "quote": "1939年（昭和14年）9月16日から、東京地下鉄道との相互乗り入れ運転が開始", "tier": "tertiary", "title": "東京メトロ銀座線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "via": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A" } ] } ], "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260331234412/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E9%8A%80%E5%BA%A7%E7%B7%9A", "kind": "wikipedia", "quote": "浅草駅 - 上野駅間：1927年12月30日開業（2.2 km）。東京地下鉄道が建設した浅草駅 - 新橋駅間の建設費用は、総額4,213万円であった。", "tier": "tertiary", "title": "東京メトロ銀座線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ銀座線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260519222108/https://metroarchive.jp/content/ginza.html/", "kind": "primary", "quote": "1927（昭和2）年12月30日 東洋初の地下鉄となる浅草〜上野間2.2kmが営業を開始", "tier": "primary", "title": "銀座線の歴史 — メトロアーカイブアルバム (Tokyo Metro)", "url": "https://metroarchive.jp/content/ginza.html/" } ] }, { "cityId": "tokyo", "color": "#F62E36", "displayNumber": "M", "id": "tokyo-line-m", "name": { "en": "Marunouchi Line" }, "phases": [ { "confidence": "medium", "constructionStart": "1951", "geometryRef": "tokyo-M", "id": "tokyo-m-19540120", "kind": "initial", "label": { "en": "Stage 1 opens: Ikebukuro → Ochanomizu (initial section)" }, "notes": "[Date chase 2026-06-12] Construction start 1951 has month-level precision per JA Wikipedia: groundbreaking ceremony 1951-03-30, actual construction start 1951-04-20 (Ikebukuro–Kanda section), citing the official corporate history 帝都高速度交通営団史 (Tokyo Metro 2004, p.569, offline).", "opened": "1954-01-20", "segment": { "fromStopIndex": 19, "toStopIndex": 23 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260428162403/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E4%B8%B8%E3%83%8E%E5%86%85%E7%B7%9A", "kind": "wikipedia", "quote": "1954年1月20日：池袋（仮駅）～御茶ノ水間 (6.4 km) 開業", "tier": "tertiary", "title": "東京メトロ丸ノ内線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ丸ノ内線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260611125620/https://metroarchive.jp/content/marunouchi.html/", "kind": "primary", "quote": "1951（昭和26）年4月、工事に着工 … 1954年1月20日 池袋～御茶ノ水 6.4km", "tier": "primary", "title": "丸ノ内線の歴史 — メトロアーカイブアルバム (Tokyo Metro)", "url": "https://metroarchive.jp/content/marunouchi.html/" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260530011319/https://en.wikipedia.org/wiki/Marunouchi_Line", "kind": "wikipedia", "quote": "between Ikebukuro and Ochanomizu on January 20, 1954", "tier": "tertiary", "title": "Marunouchi Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Marunouchi_Line" } ], "stationCount": 5 }, { "confidence": "medium", "geometryRef": "tokyo-M", "id": "tokyo-m-19560320", "kind": "extension", "label": { "en": "Extension: Ochanomizu → Awajichō" }, "opened": "1956-03-20", "segment": { "fromStopIndex": 18, "toStopIndex": 19 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260428162403/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E4%B8%B8%E3%83%8E%E5%86%85%E7%B7%9A", "kind": "wikipedia", "quote": "1956年3月20日：御茶ノ水～淡路町間 (0.8 km) 開業", "tier": "tertiary", "title": "東京メトロ丸ノ内線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ丸ノ内線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260611125620/https://metroarchive.jp/content/marunouchi.html/", "kind": "primary", "quote": "1956年3月20日 御茶ノ水～淡路町 0.8km", "tier": "primary", "title": "丸ノ内線の歴史 — メトロアーカイブアルバム (Tokyo Metro)", "url": "https://metroarchive.jp/content/marunouchi.html/" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "tokyo-M", "id": "tokyo-m-19560720", "kind": "extension", "label": { "en": "Extension: Awajichō → Tokyo" }, "opened": "1956-07-20", "segment": { "fromStopIndex": 16, "toStopIndex": 18 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260428162403/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E4%B8%B8%E3%83%8E%E5%86%85%E7%B7%9A", "kind": "wikipedia", "quote": "1956年7月20日：淡路町～東京間 (1.4 km) 開業", "tier": "tertiary", "title": "東京メトロ丸ノ内線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ丸ノ内線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260611125620/https://metroarchive.jp/content/marunouchi.html/", "kind": "primary", "quote": "1956年7月20日 淡路町～東京 1.5km", "tier": "primary", "title": "丸ノ内線の歴史 — メトロアーカイブアルバム (Tokyo Metro)", "url": "https://metroarchive.jp/content/marunouchi.html/" } ], "stationCount": 2 }, { "confidence": "medium", "geometryRef": "tokyo-M", "id": "tokyo-m-19571215", "kind": "extension", "label": { "en": "Extension: Tokyo → Nishi-Ginza (now Ginza)" }, "opened": "1957-12-15", "segment": { "fromStopIndex": 15, "toStopIndex": 16 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260428162403/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E4%B8%B8%E3%83%8E%E5%86%85%E7%B7%9A", "kind": "wikipedia", "quote": "1957年12月15日：東京～西銀座（銀座）間 (1.1 km) 開業", "tier": "tertiary", "title": "東京メトロ丸ノ内線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ丸ノ内線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260611125620/https://metroarchive.jp/content/marunouchi.html/", "kind": "primary", "quote": "1957年12月15日 東京～西銀座（現：銀座） 1.1km", "tier": "primary", "title": "丸ノ内線の歴史 — メトロアーカイブアルバム (Tokyo Metro)", "url": "https://metroarchive.jp/content/marunouchi.html/" } ], "stationCount": 2 }, { "confidence": "medium", "geometryRef": "tokyo-M", "id": "tokyo-m-19581015", "kind": "extension", "label": { "en": "Extension: Nishi-Ginza (Ginza) → Kasumigaseki" }, "opened": "1958-10-15", "segment": { "fromStopIndex": 14, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260611125620/https://metroarchive.jp/content/marunouchi.html/", "kind": "primary", "quote": "1958年10月15日 西銀座～霞ケ関 1.0km", "tier": "primary", "title": "丸ノ内線の歴史 — メトロアーカイブアルバム (Tokyo Metro)", "url": "https://metroarchive.jp/content/marunouchi.html/" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260428162403/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E4%B8%B8%E3%83%8E%E5%86%85%E7%B7%9A", "kind": "wikipedia", "quote": "1958年10月15日：銀座～霞ケ関間 (1.1 km) 開業", "tier": "tertiary", "title": "東京メトロ丸ノ内線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ丸ノ内線" } ], "stationCount": 2 }, { "confidence": "medium", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "JPY", "isEstimate": false, "value": 27805000000, "year": 1959 }, "notes": "Total cost of the Marunouchi MAIN LINE (Ikebukuro–Shinjuku, 16.6 km) — not this segment alone: ¥27,805,000,000 (¥278億500万円), of which civil-engineering works ¥15,069,226,000 (¥150億6922万6000円). [Citation chase 2026-06-11] The ¥27,805,000,000 (278億500万円) main-line total is sourced to the official 1960 construction-history book 丸ノ内線建設史（上巻）p.33; the Japanese Wikipedia citation qualifies it as 「予定含む」 (including some planned amounts), so it is a near-final outturn rather than a fully audited figure. The combined Marunouchi + Ogikubo (荻窪線, ¥201億) total of ¥479億 reported by metroarchive is a different, broader scope.", "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260428162403/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E4%B8%B8%E3%83%8E%E5%86%85%E7%B7%9A", "kind": "wikipedia", "quote": "1959年3月15日：霞ケ関～新宿（仮駅）間 (5.8 km) 開業", "tier": "tertiary", "title": "東京メトロ丸ノ内線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ丸ノ内線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260611125620/https://metroarchive.jp/content/marunouchi.html/", "kind": "primary", "quote": "総工事費は479億円（丸ノ内線・荻窪線合計）", "tier": "primary", "title": "丸ノ内線の歴史 — メトロアーカイブアルバム (Tokyo Metro)", "url": "https://metroarchive.jp/content/marunouchi.html/" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20260303040153/https://metroarchive.jp/content/ebook_marunouchi.html/", "kind": "primary", "publisher": "帝都高速度交通営団 / 公益財団法人メトロ文化財団", "quote": "以来8年の歳月と278億円の巨費を要して、1959(昭和34)年に池袋～新宿間16.6kmが開通しました。", "tier": "primary", "title": "東京地下鉄道丸ノ内線建設史（上巻）— メトロアーカイブ電子書籍 (帝都高速度交通営団, 1960)", "url": "https://metroarchive.jp/content/ebook_marunouchi.html/", "via": "https://ja.wikipedia.org/wiki/東京メトロ丸ノ内線" } ] }, "geometryRef": "tokyo-M", "id": "tokyo-m-19590315", "kind": "extension", "label": { "en": "Extension: Kasumigaseki → Shinjuku (main line Ikebukuro–Shinjuku completed)" }, "opened": "1959-03-15", "segment": { "fromStopIndex": 7, "toStopIndex": 14 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260428162403/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E4%B8%B8%E3%83%8E%E5%86%85%E7%B7%9A", "kind": "wikipedia", "quote": "1959年3月15日：霞ケ関～新宿（仮駅）間 (5.8 km) 開業", "tier": "tertiary", "title": "東京メトロ丸ノ内線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ丸ノ内線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260611125620/https://metroarchive.jp/content/marunouchi.html/", "kind": "primary", "quote": "総工事費は479億円（丸ノ内線・荻窪線合計）", "tier": "primary", "title": "丸ノ内線の歴史 — メトロアーカイブアルバム (Tokyo Metro)", "url": "https://metroarchive.jp/content/marunouchi.html/" } ], "stationCount": 4 }, { "confidence": "medium", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "JPY", "isEstimate": false, "value": 20130500000, "year": 1962 }, "notes": "Total cost of the OGIKUBO LINE + branch (Shinjuku–Ogikubo main + Nakano-sakaue–Hōnanchō branch) — covers all 1961–62 western openings, not this segment alone: ¥20,130,500,000 (¥201億3050万円), of which civil-works ¥10,941,468,000 (¥109億4146万8000円). [Citation chase 2026-06-11] Figure traces to the 1967 official construction-history book 東京地下鉄道荻窪線建設史 (pp.14・93), making it a post-completion actual outturn with a full breakdown (civil ¥10,941,468,000, electrical ¥1,401,905,000, rolling stock ¥4,633,322,000, other ¥3,153,805,000); the primary source's metroarchive.jp landing page corroborates the rounded 201億円 total.", "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260428162403/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E4%B8%B8%E3%83%8E%E5%86%85%E7%B7%9A", "kind": "wikipedia", "quote": "1961年2月8日：荻窪線の新宿 - 新中野間 (3.0 km)・中野坂上 - 中野富士見町間 (1.9 km) 開業", "tier": "tertiary", "title": "東京メトロ丸ノ内線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ丸ノ内線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260611125741/https://ja.wikipedia.org/wiki/%E4%B8%AD%E9%87%8E%E5%9D%82%E4%B8%8A%E9%A7%85", "kind": "wikipedia", "quote": "1961年2月8日、荻窪線（新宿駅 - 新中野駅間）・分岐線（中野坂上駅 - 中野富士見町駅間）の開業", "tier": "tertiary", "title": "中野坂上駅 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/中野坂上駅" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20260210063808/https://metroarchive.jp/content/ebook_ogikubo.html/", "kind": "primary", "publisher": "Metro Cultural Foundation (メトロ文化財団) / 帝都高速度交通営団 (original author)", "quote": "営団地下鉄（現：東京メトロ）は201億円という巨費を投じて新宿から延伸する荻窪線を建設しました。", "tier": "primary", "title": "東京地下鉄道荻窪線建設史 (1967) — Metro Archive digitized edition, landing page", "url": "https://metroarchive.jp/content/ebook_ogikubo.html/", "via": "https://ja.wikipedia.org/wiki/東京メトロ丸ノ内線" } ] }, "geometryRef": "tokyo-M", "id": "tokyo-m-19610208", "kind": "extension", "label": { "en": "Stage opens: Shinjuku → Shin-nakano AND branch Nakano-sakaue → Nakano-fujimichō (Ogikubo Line opens)" }, "opened": "1961-02-08", "segment": { "fromStopIndex": 4, "toStopIndex": 7 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260428162403/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E4%B8%B8%E3%83%8E%E5%86%85%E7%B7%9A", "kind": "wikipedia", "quote": "1961年2月8日：荻窪線の新宿 - 新中野間 (3.0 km)・中野坂上 - 中野富士見町間 (1.9 km) 開業", "tier": "tertiary", "title": "東京メトロ丸ノ内線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ丸ノ内線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260611125741/https://ja.wikipedia.org/wiki/%E4%B8%AD%E9%87%8E%E5%9D%82%E4%B8%8A%E9%A7%85", "kind": "wikipedia", "quote": "1961年2月8日、荻窪線（新宿駅 - 新中野駅間）・分岐線（中野坂上駅 - 中野富士見町駅間）の開業", "tier": "tertiary", "title": "中野坂上駅 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/中野坂上駅" } ], "stationCount": 4 }, { "confidence": "medium", "geometryRef": "tokyo-M", "id": "tokyo-m-19611101", "kind": "extension", "label": { "en": "Extension: Shin-nakano → Minami-Asagaya (Ogikubo Line)" }, "opened": "1961-11-01", "segment": { "fromStopIndex": 1, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260428162403/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E4%B8%B8%E3%83%8E%E5%86%85%E7%B7%9A", "kind": "wikipedia", "quote": "1961年11月1日：新中野～南阿佐ケ谷間 (3.1 km) 開業", "tier": "tertiary", "title": "東京メトロ丸ノ内線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ丸ノ内線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260530011319/https://en.wikipedia.org/wiki/Marunouchi_Line", "kind": "wikipedia", "quote": "Shin-Nakano to Minami-Asagaya on November 1, 1961", "tier": "tertiary", "title": "Marunouchi Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Marunouchi_Line" } ], "stationCount": 2 }, { "confidence": "medium", "geometryRef": "tokyo-M", "id": "tokyo-m-19620123", "kind": "extension", "label": { "en": "Extension: Minami-Asagaya → Ogikubo (Ogikubo Line Shinjuku–Ogikubo complete)" }, "opened": "1962-01-23", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260428162403/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E4%B8%B8%E3%83%8E%E5%86%85%E7%B7%9A", "kind": "wikipedia", "quote": "1962年1月23日：南阿佐ケ谷～荻窪間 (1.5 km) 開業、新宿～荻窪間が全通", "tier": "tertiary", "title": "東京メトロ丸ノ内線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ丸ノ内線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260611125620/https://metroarchive.jp/content/marunouchi.html/", "kind": "primary", "quote": "1962年1月23日 南阿佐ケ谷～荻窪 1.5km", "tier": "primary", "title": "丸ノ内線の歴史 — メトロアーカイブアルバム (Tokyo Metro)", "url": "https://metroarchive.jp/content/marunouchi.html/" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "tokyo-M#2", "id": "tokyo-m-19620323", "kind": "extension", "label": { "en": "Extension: Nakano-fujimichō → Hōnanchō (branch complete; whole Ogikubo Line opened)" }, "notes": "Hōnanchō branch completion — the branch is a separate spine not in the main-line geometry, so not drawn here.", "opened": "1962-03-23", "segment": { "fromStopIndex": 2, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260428162403/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E4%B8%B8%E3%83%8E%E5%86%85%E7%B7%9A", "kind": "wikipedia", "quote": "1962年3月23日：中野富士見町～方南町間 (1.3 km) 開業、荻窪線全線開通", "tier": "tertiary", "title": "東京メトロ丸ノ内線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ丸ノ内線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260117143250/https://ja.wikipedia.org/wiki/%E6%96%B9%E5%8D%97%E7%94%BA%E9%A7%85", "kind": "wikipedia", "quote": "方南町駅は1962年3月23日、中野富士見町駅からの延伸により開業", "tier": "tertiary", "title": "方南町駅 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/方南町駅" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": null, "id": "tokyo-m-19720401", "kind": "renumber", "label": { "en": "Renaming: Ogikubo Line (Shinjuku–Ogikubo + branch) unified under the Marunouchi Line name" }, "notes": "Renaming/unification only — no new track.", "opened": "1972-04-01", "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260428162403/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E4%B8%B8%E3%83%8E%E5%86%85%E7%B7%9A", "kind": "wikipedia", "quote": "1972年（昭和47年）4月1日：荻窪線を丸ノ内線に名称統一", "tier": "tertiary", "title": "東京メトロ丸ノ内線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ丸ノ内線" } ] }, { "confidence": "medium", "geometryRef": "tokyo-M", "id": "tokyo-m-19960528", "kind": "extension", "label": { "en": "New infill station opens: Nishi-Shinjuku (between Shinjuku and Nakano-sakaue)" }, "opened": "1996-05-28", "segment": { "fromStopIndex": 6, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260428162403/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E4%B8%B8%E3%83%8E%E5%86%85%E7%B7%9A", "kind": "wikipedia", "quote": "1996年（平成8年）5月28日：西新宿駅開業", "tier": "tertiary", "title": "東京メトロ丸ノ内線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ丸ノ内線" } ], "stationCount": 1 }, { "confidence": "high", "geometryRef": null, "id": "tokyo-m-20190705", "kind": "extension", "label": { "en": "Hōnanchō branch upgraded: 6-car through service Ikebukuro ↔ Hōnanchō begins" }, "notes": "Operational upgrade (6-car through service) — no new track. [Opening-date chase 2026-06-13] Ceremonial commemorative run with the new 2000-series train occurred 2019-07-04; regular 6-car through revenue service Ikebukuro–Honancho began 2019-07-05 (the curated public-service date).", "opened": "2019-07-05", "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260428162403/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E4%B8%B8%E3%83%8E%E5%86%85%E7%B7%9A", "kind": "wikipedia", "quote": "2019年（平成31年・令和元年）7月5日：方南町駅のホーム6両化完成に伴い、6両編成での池袋駅 - 方南町駅間の直通運転開始", "tier": "tertiary", "title": "東京メトロ丸ノ内線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ丸ノ内線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20250720125737/https://travel.watch.impress.co.jp/docs/news/1194399.html", "kind": "news", "quote": "丸ノ内線 池袋駅～方南町駅間で6両編成の直通運転開始", "tier": "secondary", "title": "東京メトロ、丸ノ内線 池袋駅～方南町駅間で6両編成の直通運転開始 — トラベル Watch", "url": "https://travel.watch.impress.co.jp/docs/news/1194399.html" } ] }, { "confidence": "medium", "geometryRef": "tokyo-M#2", "id": "tokyo-m-1961-honancho-branch", "kind": "extension", "label": { "en": "Ogikubo Line branch opens: Nakano-sakaue → Nakano-fujimichō (Hōnanchō branch begins)" }, "notes": "The Hōnanchō (Ogikubo Line) branch stub Nakano-sakaue→Nakano-fujimichō, opened with the 1961 Ogikubo Line stage; drawn on the branch sub-spine tokyo-M#2.", "opened": "1961-02-08", "segment": { "fromStopIndex": 0, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260428162403/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E4%B8%B8%E3%83%8E%E5%86%85%E7%B7%9A", "kind": "wikipedia", "quote": "1961年2月8日：荻窪線の新宿 - 新中野間 (3.0 km)・中野坂上 - 中野富士見町間 (1.9 km) 開業", "tier": "tertiary", "title": "東京メトロ丸ノ内線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ丸ノ内線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260611125741/https://ja.wikipedia.org/wiki/%E4%B8%AD%E9%87%8E%E5%9D%82%E4%B8%8A%E9%A7%85", "kind": "wikipedia", "quote": "1961年2月8日、荻窪線（新宿駅 - 新中野駅間）・分岐線（中野坂上駅 - 中野富士見町駅間）の開業", "tier": "tertiary", "title": "中野坂上駅 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/中野坂上駅" } ] } ], "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260428162403/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E4%B8%B8%E3%83%8E%E5%86%85%E7%B7%9A", "kind": "wikipedia", "quote": "1954年1月20日：池袋（仮駅）～御茶ノ水間 (6.4 km) 開業", "tier": "tertiary", "title": "東京メトロ丸ノ内線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ丸ノ内線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260611125620/https://metroarchive.jp/content/marunouchi.html/", "kind": "primary", "quote": "1951（昭和26）年4月、工事に着工 … 1954年1月20日 池袋～御茶ノ水 6.4km", "tier": "primary", "title": "丸ノ内線の歴史 — メトロアーカイブアルバム (Tokyo Metro)", "url": "https://metroarchive.jp/content/marunouchi.html/" } ] }, { "cityId": "tokyo", "color": "#B5B5AC", "displayNumber": "H", "id": "tokyo-line-h", "name": { "en": "Hibiya Line" }, "phases": [ { "confidence": "medium", "constructionStart": "1959", "geometryRef": "tokyo-H", "id": "tokyo-h-19610328", "kind": "initial", "label": { "en": "Stage 1 opens: Minami-Senju → Naka-okachimachi (initial section)" }, "notes": "[Date chase 2026-06-12] Construction-start day/month available: 1 May 1959 (metroarchive.jp and JA Wikipedia, latter citing 東京地下鉄道日比谷線建設史 p.27).", "opened": "1961-03-28", "segment": { "fromStopIndex": 16, "toStopIndex": 20 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260611125743/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%97%A5%E6%AF%94%E8%B0%B7%E7%B7%9A", "kind": "wikipedia", "quote": "1961年3月28日：南千住～仲御徒町間が開業", "tier": "tertiary", "title": "東京メトロ日比谷線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%97%A5%E6%AF%94%E8%B0%B7%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20251213221315/https://metroarchive.jp/content/hibiya.html/", "kind": "primary", "quote": "1959年5月1日 建設工事に着手 … 1961年3月28日 南千住～仲御徒町（3.7 km）", "tier": "primary", "title": "日比谷線の歴史 — メトロアーカイブアルバム", "url": "https://metroarchive.jp/content/hibiya.html/" } ], "stationCount": 3 }, { "confidence": "medium", "geometryRef": "tokyo-H", "id": "tokyo-h-19620531", "kind": "extension", "label": { "en": "Extension opens: Kita-Senju → Minami-Senju (north) and Naka-okachimachi → Ningyōchō (centre); Tobu Skytree Line through-service begins" }, "opened": "1962-05-31", "segment": { "fromStopIndex": 13, "toStopIndex": 21 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20251213221315/https://metroarchive.jp/content/hibiya.html/", "kind": "primary", "quote": "1962年5月31日 北千住～南千住（2.1 km）／仲御徒町～人形町（2.5 km）", "tier": "primary", "title": "日比谷線開通年表 — メトロアーカイブアルバム", "url": "https://metroarchive.jp/content/hibiya.html/" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260611125743/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%97%A5%E6%AF%94%E8%B0%B7%E7%B7%9A", "kind": "wikipedia", "quote": "1962年5月31日：北千住～南千住、仲御徒町～人形町間が開業。東武直通開始", "tier": "tertiary", "title": "東京メトロ日比谷線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%97%A5%E6%AF%94%E8%B0%B7%E7%B7%9A" } ], "stationCount": 4 }, { "confidence": "medium", "geometryRef": "tokyo-H", "id": "tokyo-h-19630228", "kind": "extension", "label": { "en": "Extension opens: Ningyōchō → Higashi-ginza" }, "opened": "1963-02-28", "segment": { "fromStopIndex": 9, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20251213221315/https://metroarchive.jp/content/hibiya.html/", "kind": "primary", "quote": "1963年2月28日 人形町～東銀座（3.0 km）", "tier": "primary", "title": "日比谷線開通年表 — メトロアーカイブアルバム", "url": "https://metroarchive.jp/content/hibiya.html/" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260611125743/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%97%A5%E6%AF%94%E8%B0%B7%E7%B7%9A", "kind": "wikipedia", "quote": "1963年2月28日：人形町～東銀座間が開業", "tier": "tertiary", "title": "東京メトロ日比谷線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%97%A5%E6%AF%94%E8%B0%B7%E7%B7%9A" } ], "stationCount": 2 }, { "confidence": "medium", "geometryRef": "tokyo-H", "id": "tokyo-h-19640325", "kind": "extension", "label": { "en": "Extension opens: Kasumigaseki → Ebisu (southern section)" }, "opened": "1964-03-25", "segment": { "fromStopIndex": 1, "toStopIndex": 9 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20251213221315/https://metroarchive.jp/content/hibiya.html/", "kind": "primary", "quote": "1964年3月25日 霞ケ関～恵比寿（6.0 km）", "tier": "primary", "title": "日比谷線開通年表 — メトロアーカイブアルバム", "url": "https://metroarchive.jp/content/hibiya.html/" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260611125743/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%97%A5%E6%AF%94%E8%B0%B7%E7%B7%9A", "kind": "wikipedia", "quote": "1964年3月25日：霞ケ関～恵比寿間が開業", "tier": "tertiary", "title": "東京メトロ日比谷線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%97%A5%E6%AF%94%E8%B0%B7%E7%B7%9A" } ], "stationCount": 6 }, { "confidence": "medium", "geometryRef": "tokyo-H", "id": "tokyo-h-19640722", "kind": "extension", "label": { "en": "Extension opens: Ebisu → Naka-meguro" }, "opened": "1964-07-22", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20251213221315/https://metroarchive.jp/content/hibiya.html/", "kind": "primary", "quote": "1964年7月22日 恵比寿～中目黒（1.0 km）", "tier": "primary", "title": "日比谷線開通年表 — メトロアーカイブアルバム", "url": "https://metroarchive.jp/content/hibiya.html/" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260611125743/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%97%A5%E6%AF%94%E8%B0%B7%E7%B7%9A", "kind": "wikipedia", "quote": "1964年7月22日：恵比寿～中目黒間が開業", "tier": "tertiary", "title": "東京メトロ日比谷線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%97%A5%E6%AF%94%E8%B0%B7%E7%B7%9A" } ], "stationCount": 1 }, { "confidence": "medium", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "JPY", "isEstimate": false, "value": 63560000000, "year": 1966 }, "notes": "Figure is the total construction cost of the ENTIRE 20.3 km Hibiya Line (all stages combined), not this final segment alone — recorded as ¥63.56 billion (635億6,000万円) as of June 1966. Sources note final cost ran to nearly double the original budget ('当初の予算より2倍近くかかり'). [Citation chase 2026-06-11] Confirmed: the Wikipedia 「建設費用」 section states the figure exactly as 635億6,000万円 (as of June 1966), citing the primary construction-history book 東京地下鉄道日比谷線建設史 (1969) pp.14·171–175, and the metroarchive.jp primary source corroborates with a rounded 636億円. This is the final actual (outturn) cost of the whole line, which overran the original budget by nearly 2x.", "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20251213221315/https://metroarchive.jp/content/hibiya.html/", "kind": "primary", "quote": "1964年8月29日 東銀座～霞ケ関（2.0 km）全線開通 … 当初の予算より2倍近くかかり … 全線建設費636億円", "tier": "primary", "title": "日比谷線開通年表 — メトロアーカイブアルバム", "url": "https://metroarchive.jp/content/hibiya.html/" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260611125743/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%97%A5%E6%AF%94%E8%B0%B7%E7%B7%9A", "kind": "wikipedia", "quote": "1964年8月29日：東銀座～霞ケ関間が開業し全線開通。東急東横線直通開始", "tier": "tertiary", "title": "東京メトロ日比谷線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%97%A5%E6%AF%94%E8%B0%B7%E7%B7%9A" } ] }, "geometryRef": "tokyo-H", "id": "tokyo-h-19640829", "kind": "extension", "label": { "en": "Final section opens: Higashi-ginza → Kasumigaseki (whole line complete); Tokyu Toyoko Line through-service begins" }, "opened": "1964-08-29", "segment": { "fromStopIndex": 6, "toStopIndex": 9 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20251213221315/https://metroarchive.jp/content/hibiya.html/", "kind": "primary", "quote": "1964年8月29日 東銀座～霞ケ関（2.0 km）全線開通 … 当初の予算より2倍近くかかり … 全線建設費636億円", "tier": "primary", "title": "日比谷線開通年表 — メトロアーカイブアルバム", "url": "https://metroarchive.jp/content/hibiya.html/" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260611125743/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%97%A5%E6%AF%94%E8%B0%B7%E7%B7%9A", "kind": "wikipedia", "quote": "1964年8月29日：東銀座～霞ケ関間が開業し全線開通。東急東横線直通開始", "tier": "tertiary", "title": "東京メトロ日比谷線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%97%A5%E6%AF%94%E8%B0%B7%E7%B7%9A" } ], "stationCount": 2 }, { "confidence": "high", "constructionStart": "2016", "cost": { "basis": "estimate", "confidence": "medium", "nominal": { "currency": "JPY", "isEstimate": true, "value": 36000000000, "year": 2020 }, "notes": "Approximately ¥36 billion (約360億円) total project cost for the Toranomon Hills station infill works; project led by UR (Urban Renaissance Agency). Construction work commenced 2016-02-08. [Citation chase 2026-06-11] The ¥36bn figure is a projection (見込む) reported by the trade paper Nikkan Kensetsu Kogyo Shimbun (2020-06-03, archived) and echoed by Japanese Wikipedia; the Tokyo Metro primary press release does not state a cost. It covers the total UR-led station works spanning the 2020 provisional and 2023 full openings.", "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260307081702/https://www.tokyometro.jp/news/2020/207736.html", "kind": "primary", "quote": "2020年6月6日（土）日比谷線虎ノ門ヒルズ駅 開業", "tier": "primary", "title": "2020年6月6日（土）日比谷線虎ノ門ヒルズ駅 開業 — 東京メトロ", "url": "https://www.tokyometro.jp/news/2020/207736.html" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20251127071158/https://ja.wikipedia.org/wiki/%E8%99%8E%E3%83%8E%E9%96%80%E3%83%92%E3%83%AB%E3%82%BA%E9%A7%85", "kind": "wikipedia", "quote": "2016年（平成28年）2月8日：当駅の工事に着手 … 2020年（令和2年）6月6日：暫定開業 … 2023年（令和5年）7月15日：本開業", "tier": "tertiary", "title": "虎ノ門ヒルズ駅 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E8%99%8E%E3%83%8E%E9%96%80%E3%83%92%E3%83%AB%E3%82%BA%E9%A7%85" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20251105040901/https://response.jp/article/2020/06/06/335344.html", "kind": "news", "quote": "全線開通から56年ぶりの新駅「虎ノ門ヒルズ」が開業する", "tier": "secondary", "title": "東京メトロ「虎ノ門ヒルズ」駅開業---日比谷線 95年の歴史を振り返る — Response.jp", "url": "https://response.jp/article/2020/06/06/335344.html" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20210501070312/https://www.decn.co.jp/?p=114143", "kind": "news", "publisher": "日刊建設工業新聞 (Nikkan Kensetsu Kogyo Shimbun)", "quote": "総工費は約３６０億円を見込んでいる。", "tier": "secondary", "title": "都市機構、東京メトロ／日比谷線・虎ノ門ヒルズ駅公開／56年ぶり新駅、6月6日開業", "url": "https://www.decn.co.jp/?p=114143", "via": "https://ja.wikipedia.org/wiki/%E8%99%8E%E3%83%8E%E9%96%80%E3%83%92%E3%83%AB%E3%82%BA%E9%A7%85" } ] }, "geometryRef": "tokyo-H", "id": "tokyo-h-20200606", "kind": "extension", "label": { "en": "New infill station opens: Toranomon Hills (H06), between Kamiyachō and Kasumigaseki (provisional opening)" }, "notes": "[Date chase 2026-06-12] Construction-start exact date: 8 February 2016 (Tokyo Metro/UR press release pr20160208, cited via JA Wikipedia). PDF returned HTTP 403/paywall at chase time but the Wikipedia citation (date+title 工事着手) is unambiguous. [Opening-date chase 2026-06-13] Toranomon Hills station 2020-06-06 was a provisional opening (暫定開業); full/permanent opening (本開業) followed on 2023-07-15 with the station tower's completion. 2020-06-06 is the correct first public revenue-service date and the curated label already notes it as provisional.", "opened": "2020-06-06", "segment": { "fromStopIndex": 4, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260307081702/https://www.tokyometro.jp/news/2020/207736.html", "kind": "primary", "quote": "2020年6月6日（土）日比谷線虎ノ門ヒルズ駅 開業", "tier": "primary", "title": "2020年6月6日（土）日比谷線虎ノ門ヒルズ駅 開業 — 東京メトロ", "url": "https://www.tokyometro.jp/news/2020/207736.html" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20251127071158/https://ja.wikipedia.org/wiki/%E8%99%8E%E3%83%8E%E9%96%80%E3%83%92%E3%83%AB%E3%82%BA%E9%A7%85", "kind": "wikipedia", "quote": "2016年（平成28年）2月8日：当駅の工事に着手 … 2020年（令和2年）6月6日：暫定開業 … 2023年（令和5年）7月15日：本開業", "tier": "tertiary", "title": "虎ノ門ヒルズ駅 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E8%99%8E%E3%83%8E%E9%96%80%E3%83%92%E3%83%AB%E3%82%BA%E9%A7%85" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20251105040901/https://response.jp/article/2020/06/06/335344.html", "kind": "news", "quote": "全線開通から56年ぶりの新駅「虎ノ門ヒルズ」が開業する", "tier": "secondary", "title": "東京メトロ「虎ノ門ヒルズ」駅開業---日比谷線 95年の歴史を振り返る — Response.jp", "url": "https://response.jp/article/2020/06/06/335344.html" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20251103204118/https://www.tokyometro.jp/news/images_h/metroNews20160208_g06.pdf", "kind": "primary", "publisher": "都市再生機構／東京地下鉄", "quote": "工事着手について (press release dated 2016-02-08, cited as ref name=\"pr20160208\" in Wikipedia, confirming construction commencement on that date)", "tier": "primary", "title": "東京メトロ日比谷線虎ノ門新駅（仮称）整備にかかる工事着手について", "url": "https://www.tokyometro.jp/news/images_h/metroNews20160208_g06.pdf", "via": "https://ja.wikipedia.org/wiki/%E8%99%8E%E3%83%8E%E9%96%80%E3%83%92%E3%83%AB%E3%82%BA%E9%A7%85" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260611125743/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%97%A5%E6%AF%94%E8%B0%B7%E7%B7%9A", "kind": "wikipedia", "quote": "1961年3月28日：南千住～仲御徒町間が開業", "tier": "tertiary", "title": "東京メトロ日比谷線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%97%A5%E6%AF%94%E8%B0%B7%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20251213221315/https://metroarchive.jp/content/hibiya.html/", "kind": "primary", "quote": "1959年5月1日 建設工事に着手 … 1961年3月28日 南千住～仲御徒町（3.7 km）", "tier": "primary", "title": "日比谷線の歴史 — メトロアーカイブアルバム", "url": "https://metroarchive.jp/content/hibiya.html/" } ] }, { "cityId": "tokyo", "color": "#009BBF", "displayNumber": "T", "id": "tokyo-line-t", "name": { "en": "Tozai Line" }, "phases": [ { "confidence": "medium", "constructionStart": "1962", "geometryRef": "tokyo-T", "id": "tokyo-t-19641223", "kind": "initial", "label": { "en": "Stage 1 opens: Takadanobaba → Kudanshita (initial Line 5 section)" }, "notes": "[Date chase 2026-06-12] Official construction history (東京地下鉄道東西線建設史 p.76) and the Tokyo Metro Archive both date the construction start to October 1962 (Wikipedia gives the precise date 1962-10-19) for the Takadanobaba–Kudanshita section. [Opening-date chase 2026-06-13] Tokyo Metro official archive (metroarchive.jp) confirms 1964-12-23 as the revenue-service opening of the Takadanobaba–Kudanshita 4.8 km section; the curated quote from that source had only captured the 1962 construction start.", "opened": "1964-12-23", "segment": { "fromStopIndex": 2, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260329061155/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9D%B1%E8%A5%BF%E7%B7%9A", "kind": "wikipedia", "quote": "高田馬場 - 九段下間 (4.8 km) 開業", "tier": "tertiary", "title": "東京メトロ東西線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9D%B1%E8%A5%BF%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260314075808/https://metroarchive.jp/content/touzai.html/", "kind": "primary", "quote": "1962（昭和37）年10月、営団は国鉄中央線との相互直通路線（5号線）高田馬場～九段下間の4.8㎞の工事に着手", "tier": "primary", "title": "東西線の歴史 — メトロアーカイブアルバム (Tokyo Metro archive)", "url": "https://metroarchive.jp/content/touzai.html/" } ], "stationCount": 5 }, { "confidence": "medium", "geometryRef": "tokyo-T", "id": "tokyo-t-19660316", "kind": "extension", "label": { "en": "Stage 2 opens: Nakano → Takadanobaba (3.9 km) and Kudanshita → Takebashi (1.0 km)" }, "notes": "[Opening-date chase 2026-06-13] Tokyo Metro official archive confirms 1966-03-16 for both simultaneous sub-segments (Nakano–Takadanobaba 3.9 km and Kudanshita–Takebashi 1.0 km).", "opened": "1966-03-16", "segment": { "fromStopIndex": 0, "toStopIndex": 7 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260329061155/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9D%B1%E8%A5%BF%E7%B7%9A", "kind": "wikipedia", "quote": "中野 - 高田馬場間 (3.9 km)・九段下 - 竹橋間 (1.0 km) 開業", "tier": "tertiary", "title": "東京メトロ東西線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9D%B1%E8%A5%BF%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260314075808/https://metroarchive.jp/content/touzai.html/", "kind": "primary", "quote": "1966年3月16日 | 中野～高田馬場 | 3.9km / 九段下～竹橋 | 1.0km", "tier": "primary", "title": "東西線の歴史 — メトロアーカイブアルバム (Tokyo Metro archive)", "url": "https://metroarchive.jp/content/touzai.html/" } ], "stationCount": 3 }, { "confidence": "medium", "geometryRef": "tokyo-T", "id": "tokyo-t-19661001", "kind": "extension", "label": { "en": "Stage 3 opens: Takebashi → Ōtemachi (1.0 km)" }, "notes": "[Opening-date chase 2026-06-13] Tokyo Metro official archive confirms 1966-10-01 for the Takebashi–Otemachi 1.0 km section.", "opened": "1966-10-01", "segment": { "fromStopIndex": 7, "toStopIndex": 8 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260329061155/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9D%B1%E8%A5%BF%E7%B7%9A", "kind": "wikipedia", "quote": "竹橋 - 大手町間 (1.0 km) 開業", "tier": "tertiary", "title": "東京メトロ東西線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9D%B1%E8%A5%BF%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260314075808/https://metroarchive.jp/content/touzai.html/", "kind": "primary", "quote": "1966年10月1日 | 竹橋～大手町 | 1.0km", "tier": "primary", "title": "東西線の歴史 — メトロアーカイブアルバム (Tokyo Metro archive)", "url": "https://metroarchive.jp/content/touzai.html/" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "tokyo-T", "id": "tokyo-t-19670914", "kind": "extension", "label": { "en": "Stage 4 opens: Ōtemachi → Tōyōchō (5.1 km)" }, "notes": "[Opening-date chase 2026-06-13] Three independent sources (Tokyo Metro official archive, JA + EN Wikipedia) agree on 1967-09-14 for the Otemachi–Toyocho 5.1 km section.", "opened": "1967-09-14", "segment": { "fromStopIndex": 8, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260329061155/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9D%B1%E8%A5%BF%E7%B7%9A", "kind": "wikipedia", "quote": "大手町 - 東陽町間 (5.1 km) 開業", "tier": "tertiary", "title": "東京メトロ東西線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9D%B1%E8%A5%BF%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260613164557/https://en.wikipedia.org/wiki/T%C5%8Dzai_Line_(Tokyo)", "kind": "wikipedia", "quote": "September 14, 1967: Ōtemachi to Tōyōchō opens", "tier": "tertiary", "title": "Tōzai Line (Tokyo) — Wikipedia", "url": "https://en.wikipedia.org/wiki/T%C5%8Dzai_Line_(Tokyo)" } ], "stationCount": 5 }, { "confidence": "medium", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "JPY", "isEstimate": false, "value": 113650000000, "year": 1971 }, "notes": "Figure is for the ENTIRE Tōzai Line (Nakano–Nishi-Funabashi, all stages combined), not this segment alone: total ¥113.65 billion as of July 1971, comprising ¥73.5bn civil works, ¥7.0bn electrical, ¥14.5bn rolling stock (per JA Wikipedia citing construction record). [Citation chase 2026-06-11] The ultimate source is the official construction-history book 東京地下鉄道東西線建設史 (p.18, 帝都高速度交通営団, 1978), but it is only available as a JS-rendered scanned ebook at metroarchive.jp and could not be directly verified; the figure rests on the single secondary JA Wikipedia citation. The full breakdown is ¥73.55bn civil, ¥7.06bn electrical, ¥14.52bn rolling stock, ¥18.53bn other.", "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260329061155/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9D%B1%E8%A5%BF%E7%B7%9A", "kind": "wikipedia", "quote": "東陽町 - 西船橋間 (15.0 km) 開業（全線開業）", "tier": "tertiary", "title": "東京メトロ東西線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9D%B1%E8%A5%BF%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260329061155/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9D%B1%E8%A5%BF%E7%B7%9A", "kind": "wikipedia", "quote": "総額は1,136億5,000万円である（1971年7月時点）。土木関係費735億円、電気関係費70億円、車両関係費145億円", "tier": "tertiary", "title": "東京メトロ東西線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9D%B1%E8%A5%BF%E7%B7%9A" } ] }, "geometryRef": "tokyo-T", "id": "tokyo-t-19690329", "kind": "extension", "label": { "en": "Stage 5 opens: Tōyōchō → Nishi-Funabashi (15.0 km) — full line complete" }, "notes": "[Opening-date chase 2026-06-13] Tokyo Metro official archive confirms 1969-03-29 for the final Toyocho–Nishi-Funabashi 15.0 km section completing the line; Rapid service also began this date.", "opened": "1969-03-29", "segment": { "fromStopIndex": 13, "toStopIndex": 22 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260329061155/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9D%B1%E8%A5%BF%E7%B7%9A", "kind": "wikipedia", "quote": "東陽町 - 西船橋間 (15.0 km) 開業（全線開業）", "tier": "tertiary", "title": "東京メトロ東西線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9D%B1%E8%A5%BF%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260329061155/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9D%B1%E8%A5%BF%E7%B7%9A", "kind": "wikipedia", "quote": "総額は1,136億5,000万円である（1971年7月時点）。土木関係費735億円、電気関係費70億円、車両関係費145億円", "tier": "tertiary", "title": "東京メトロ東西線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9D%B1%E8%A5%BF%E7%B7%9A" } ], "stationCount": 6 }, { "confidence": "medium", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "JPY", "isEstimate": false, "value": 1289000000, "year": 1979 }, "notes": "Construction cost of Nishi-Kasai Station alone: ¥1,289 million (¥1.289 billion), per JA Wikipedia. Infill station added to existing track to distribute passenger load. [Citation chase 2026-06-11] Figure is an actual (outturn) cost for Nishi-Kasai Station alone, broken down by JA Wikipedia into civil engineering ¥633.761M, building works ¥414.59M, and electrical works ¥240.649M (sum ¥1,289M). The underlying primary citation (Jitsugyo no Nihon Sha pamphlet history, 2014, ISBN 9784408110608, p.122) is print-only and could not be independently verified online.", "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260425184206/https://ja.wikipedia.org/wiki/%E8%A5%BF%E8%91%9B%E8%A5%BF%E9%A7%85", "kind": "wikipedia", "quote": "1979年（昭和54年）10月1日：開業", "tier": "tertiary", "title": "西葛西駅 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E8%A5%BF%E8%91%9B%E8%A5%BF%E9%A7%85" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260425184206/https://ja.wikipedia.org/wiki/%E8%A5%BF%E8%91%9B%E8%A5%BF%E9%A7%85", "kind": "wikipedia", "quote": "駅の建設に要した費用は、総額12億8,900万円である", "tier": "tertiary", "title": "西葛西駅 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E8%A5%BF%E8%91%9B%E8%A5%BF%E9%A7%85" } ] }, "geometryRef": "tokyo-T", "id": "tokyo-t-19791001", "kind": "extension", "label": { "en": "Infill station opens: Nishi-Kasai (between Minami-Sunamachi and Kasai)" }, "opened": "1979-10-01", "segment": { "fromStopIndex": 15, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260425184206/https://ja.wikipedia.org/wiki/%E8%A5%BF%E8%91%9B%E8%A5%BF%E9%A7%85", "kind": "wikipedia", "quote": "1979年（昭和54年）10月1日：開業", "tier": "tertiary", "title": "西葛西駅 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E8%A5%BF%E8%91%9B%E8%A5%BF%E9%A7%85" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260425184206/https://ja.wikipedia.org/wiki/%E8%A5%BF%E8%91%9B%E8%A5%BF%E9%A7%85", "kind": "wikipedia", "quote": "駅の建設に要した費用は、総額12億8,900万円である", "tier": "tertiary", "title": "西葛西駅 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E8%A5%BF%E8%91%9B%E8%A5%BF%E9%A7%85" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "tokyo-T", "id": "tokyo-t-19810327", "kind": "extension", "label": { "en": "Infill station opens: Minami-Gyōtoku (between Urayasu and Gyōtoku)" }, "opened": "1981-03-27", "segment": { "fromStopIndex": 18, "toStopIndex": 18 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260425184201/https://ja.wikipedia.org/wiki/%E5%8D%97%E8%A1%8C%E5%BE%B3%E9%A7%85", "kind": "wikipedia", "quote": "1981年（昭和56年）3月27日：開業", "tier": "tertiary", "title": "南行徳駅 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E5%8D%97%E8%A1%8C%E5%BE%B3%E9%A7%85" } ], "stationCount": 1 }, { "confidence": "medium", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "JPY", "isEstimate": false, "value": 5660000000, "year": 2000 }, "notes": "Total construction cost of Myōden Station: ¥5,660 million (¥5.66 billion), per JA Wikipedia. First new Tōzai Line station in 19 years; built at the former Shimo-Myōden signal/depot junction site. [Citation chase 2026-06-11] Figure (総工費 / total construction cost) is sourced via JA Wikipedia to 帝都高速度交通営団史 p.241 (Tokyo Metro, 2004), a print-only institutional history that could not be independently verified online; treat as a final out-turn cost backed by a single accessible secondary source.", "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20251231171927/https://ja.wikipedia.org/wiki/%E5%A6%99%E5%85%B8%E9%A7%85", "kind": "wikipedia", "quote": "2000年（平成12年）1月22日：開業。総工費56億6,000万円", "tier": "tertiary", "title": "妙典駅 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E5%A6%99%E5%85%B8%E9%A7%85" } ] }, "geometryRef": "tokyo-T", "id": "tokyo-t-20000122", "kind": "extension", "label": { "en": "Infill station opens: Myōden (between Gyōtoku and Baraki-Nakayama)" }, "opened": "2000-01-22", "segment": { "fromStopIndex": 20, "toStopIndex": 20 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20251231171927/https://ja.wikipedia.org/wiki/%E5%A6%99%E5%85%B8%E9%A7%85", "kind": "wikipedia", "quote": "2000年（平成12年）1月22日：開業。総工費56億6,000万円", "tier": "tertiary", "title": "妙典駅 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E5%A6%99%E5%85%B8%E9%A7%85" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260329061155/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9D%B1%E8%A5%BF%E7%B7%9A", "kind": "wikipedia", "quote": "高田馬場 - 九段下間 (4.8 km) 開業", "tier": "tertiary", "title": "東京メトロ東西線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9D%B1%E8%A5%BF%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260314075808/https://metroarchive.jp/content/touzai.html/", "kind": "primary", "quote": "1962（昭和37）年10月、営団は国鉄中央線との相互直通路線（5号線）高田馬場～九段下間の4.8㎞の工事に着手", "tier": "primary", "title": "東西線の歴史 — メトロアーカイブアルバム (Tokyo Metro archive)", "url": "https://metroarchive.jp/content/touzai.html/" } ] }, { "cityId": "tokyo", "color": "#00BB85", "displayNumber": "C", "id": "tokyo-line-c", "name": { "en": "Chiyoda Line" }, "phases": [ { "confidence": "low", "constructionStart": "1966", "geometryRef": "tokyo-C", "id": "tokyo-c-19691220", "kind": "initial", "label": { "en": "Stage 1 opens: Kita-Senju → Ōtemachi (initial section, 9.9 km)" }, "notes": "[Date chase 2026-06-12] Construction began July 30, 1966 on the Kita-Senju–Otemachi section (千代田線建設史 p.39, via EN+JA Wikipedia). Primary source archive metroarchive.jp is image-only and currently dead-link, so confirmation rests on the two Wikipedia citations of it.", "opened": "1969-12-20", "segment": { "fromStopIndex": 9, "toStopIndex": 16 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260331234201/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%83%E4%BB%A3%E7%94%B0%E7%B7%9A", "kind": "wikipedia", "quote": "北千住 - 大手町間 (9.9 km) 開業", "tier": "tertiary", "title": "東京メトロ千代田線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ千代田線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260513201551/https://en.wikipedia.org/wiki/Chiyoda_Line", "kind": "wikipedia", "quote": "The first stretch was opened on December 20, 1969 between Kita-Senju and Ōtemachi.", "tier": "tertiary", "title": "Chiyoda Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Chiyoda_Line" } ] }, { "confidence": "low", "geometryRef": "tokyo-C", "id": "tokyo-c-19710320", "kind": "extension", "label": { "en": "Stage 2 opens: Ōtemachi → Kasumigaseki (2.2 km)" }, "notes": "[Opening-date chase 2026-06-13] JA source specifies the Ōtemachi–Kasumigaseki section entered service at 1pm (午後1時) on the opening day.", "opened": "1971-03-20", "segment": { "fromStopIndex": 6, "toStopIndex": 9 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260331234201/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%83%E4%BB%A3%E7%94%B0%E7%B7%9A", "kind": "wikipedia", "quote": "午後1時に大手町 - 靂ヶ関間 (2.2 km) 開業", "tier": "tertiary", "title": "東京メトロ千代田線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ千代田線" } ] }, { "confidence": "low", "geometryRef": "tokyo-C", "id": "tokyo-c-19710420", "kind": "extension", "label": { "en": "Stage 3 opens: Ayase → Kita-Senju (2.6 km; through-service with JNR/JR Joban Line begins)" }, "notes": "[Opening-date chase 2026-06-13] Through-running (相互直通運転) with the JNR Joban Line to Abiko began simultaneously with this opening.", "opened": "1971-04-20", "segment": { "fromStopIndex": 16, "toStopIndex": 17 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260331234201/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%83%E4%BB%A3%E7%94%B0%E7%B7%9A", "kind": "wikipedia", "quote": "綥瀬 - 北千住間 (2.6 km) 開業", "tier": "tertiary", "title": "東京メトロ千代田線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ千代田線" } ] }, { "confidence": "low", "geometryRef": "tokyo-C", "id": "tokyo-c-19721020", "kind": "extension", "label": { "en": "Stage 4 opens: Kasumigaseki → Yoyogi-Kōen (6.2 km)" }, "notes": "[Opening-date chase 2026-06-13] EN Wikipedia says 'almost completed by October 10, 1972', but the JA chronology citing the primary source (pp.198-199) clearly states October 20 (10月20日); the curated 1972-10-20 stands.", "opened": "1972-10-20", "segment": { "fromStopIndex": 0, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260331234201/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%83%E4%BB%A3%E7%94%B0%E7%B7%9A", "kind": "wikipedia", "quote": "靂ヶ関 - 代々木公園間 (6.2 km) 開業", "tier": "tertiary", "title": "東京メトロ千代田線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ千代田線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260513201551/https://en.wikipedia.org/wiki/Chiyoda_Line", "kind": "wikipedia", "quote": "The line was almost completed by October 10, 1972 when it reached Yoyogi-Kōen.", "tier": "tertiary", "title": "Chiyoda Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Chiyoda_Line" } ] }, { "confidence": "low", "constructionStart": "1972", "geometryRef": "tokyo-C", "id": "tokyo-c-19780331", "kind": "extension", "label": { "en": "Stage 5 opens: Yoyogi-Kōen → Yoyogi-Uehara (1.0 km; full line complete, through-service with Odakyu begins)" }, "notes": "[Date chase 2026-06-12] Construction of the final Yoyogi-Koen–Yoyogi-Uehara section began November 29, 1972; start was delayed by the related Odakyu Line continuous grade-separation plan (千代田線建設史 p.48, via JA Wikipedia). English Wikipedia is silent on this section's construction start. Primary archive metroarchive.jp is image-only / dead-link. [Opening-date chase 2026-06-13] Through-running with the Odakyu Odawara Line to Hon-Atsugi began simultaneously with full-line completion.", "opened": "1978-03-31", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260331234201/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%83%E4%BB%A3%E7%94%B0%E7%B7%9A", "kind": "wikipedia", "quote": "代々木公園 - 代々木上原間 (1.0 km) 開業、全線完成", "tier": "tertiary", "title": "東京メトロ千代田線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ千代田線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260513201551/https://en.wikipedia.org/wiki/Chiyoda_Line", "kind": "wikipedia", "quote": "the 1 km (0.62 mi) section to Yoyogi-Uehara was not completed until March 31, 1978.", "tier": "tertiary", "title": "Chiyoda Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Chiyoda_Line" } ] }, { "confidence": "low", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "JPY", "isEstimate": false, "value": 852100000, "year": 1979 }, "notes": "Total construction cost of the Ayase–Kita-Ayase branch (8億5,210万円 = ¥852.1 million). Year inferred from the 1979 opening; JA Wikipedia does not state an explicit price-level year. Covers this branch only, not the main line. [Citation chase 2026-06-11] Figure is an actual outturn cost, sourced via JA Wikipedia to the official construction history 「東京地下鉄道千代田線建設史」 pp.1083–1087 (帝都高速度交通営団, 1983); those specific pages are not digitized online, so the primary figure remains unverified at source though the secondary quote matches verbatim.", "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260331234201/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%83%E4%BB%A3%E7%94%B0%E7%B7%9A", "kind": "wikipedia", "quote": "綥瀬 - 北綥瀬間に要した建設費用は総額8億5,210万円である", "tier": "tertiary", "title": "東京メトロ千代田線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ千代田線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260513201551/https://en.wikipedia.org/wiki/Chiyoda_Line", "kind": "wikipedia", "quote": "The branch line to Kita-Ayase was opened on December 20, 1979.", "tier": "tertiary", "title": "Chiyoda Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Chiyoda_Line" } ] }, "geometryRef": "tokyo-C", "id": "tokyo-c-19791220", "kind": "extension", "label": { "en": "Kita-Ayase branch opens: Ayase → Kita-Ayase (2.1 km; former depot access line converted for passenger service)" }, "notes": "[Opening-date chase 2026-06-13] This was a conversion of the existing depot access track (回送線/車庫線) to passenger service; opening date 1979-12-20 corroborated by both EN and JA chronology even though the curated JA quote cites cost rather than the date.", "opened": "1979-12-20", "segment": { "fromStopIndex": 1, "toStopIndex": 17 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260331234201/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%83%E4%BB%A3%E7%94%B0%E7%B7%9A", "kind": "wikipedia", "quote": "綥瀬 - 北綥瀬間に要した建設費用は総額8億5,210万円である", "tier": "tertiary", "title": "東京メトロ千代田線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ千代田線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260513201551/https://en.wikipedia.org/wiki/Chiyoda_Line", "kind": "wikipedia", "quote": "The branch line to Kita-Ayase was opened on December 20, 1979.", "tier": "tertiary", "title": "Chiyoda Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Chiyoda_Line" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260331234201/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%83%E4%BB%A3%E7%94%B0%E7%B7%9A", "kind": "wikipedia", "quote": "北千住 - 大手町間 (9.9 km) 開業", "tier": "tertiary", "title": "東京メトロ千代田線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ千代田線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260513201551/https://en.wikipedia.org/wiki/Chiyoda_Line", "kind": "wikipedia", "quote": "The first stretch was opened on December 20, 1969 between Kita-Senju and Ōtemachi.", "tier": "tertiary", "title": "Chiyoda Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Chiyoda_Line" } ] }, { "cityId": "tokyo", "color": "#C1A470", "displayNumber": "Y", "id": "tokyo-line-y", "name": { "en": "Yurakucho Line" }, "phases": [ { "confidence": "medium", "constructionStart": "1970", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "JPY", "isEstimate": false, "value": 492000000000, "year": 1988 }, "notes": "This figure (¥4,920億 / 492 billion yen) is the TOTAL construction cost of the ENTIRE Wakōshi–Shin-kiba line, NOT this 1974 segment alone. Breakdown per JA Wikipedia: civil engineering ¥2,961.5億; electrical ¥448.3億; rolling stock ¥658.6億; other ¥851.6億. Price-year approximated as line-completion year (1988); JA source does not state a single explicit price-level year. [Citation chase 2026-06-11] Figure confirmed by JA Wikipedia's 建設費用 section, which cites the official TRTA construction history (東京地下鉄道有楽町線建設史, 1996) pp.1214–1219; this retrospective itemized total indicates a final actual (outturn) cost rather than an estimate or budget. The primary source itself (metroarchive.jp ebook viewer) is JS-rendered and could not be independently verified.", "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260605083424/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9C%89%E6%A5%BD%E7%94%BA%E7%B7%9A", "kind": "wikipedia", "quote": "1974年（昭和49年）10月30日：池袋 - 銀座一丁目間開業。開業当初の同区間の運賃は80円。7000系5両編成で運行された。", "tier": "tertiary", "title": "東京メトロ有楽町線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ有楽町線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260611125921/https://en.wikipedia.org/wiki/Yurakucho_Line_(Tokyo_Metro)", "kind": "wikipedia", "quote": "The initial section began construction in 1970 and opened for revenue service on 30 October 1974 as the Yūrakuchō Line.", "tier": "tertiary", "title": "Yūrakuchō Line — Wikipedia (EN)", "url": "https://en.wikipedia.org/wiki/Yurakucho_Line_(Tokyo_Metro)" } ] }, "geometryRef": "tokyo-Y", "id": "tokyo-y-19741030", "kind": "initial", "label": { "en": "Stage 1 opens: Ikebukuro → Ginza-itchome (initial section)" }, "notes": "[Date chase 2026-06-12] Official Tokyo Metro digital archive (東京地下鉄道有楽町線建設史) confirms civil-engineering work on the first-phase Ikebukuro–Akashi-cho (Shintomicho) section began August 1970; JA Wikipedia cites p.58 with exact date 1970-08-19.", "opened": "1974-10-30", "segment": { "fromStopIndex": 8, "toStopIndex": 18 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260605083424/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9C%89%E6%A5%BD%E7%94%BA%E7%B7%9A", "kind": "wikipedia", "quote": "1974年（昭和49年）10月30日：池袋 - 銀座一丁目間開業。開業当初の同区間の運賃は80円。7000系5両編成で運行された。", "tier": "tertiary", "title": "東京メトロ有楽町線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ有楽町線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260611125921/https://en.wikipedia.org/wiki/Yurakucho_Line_(Tokyo_Metro)", "kind": "wikipedia", "quote": "The initial section began construction in 1970 and opened for revenue service on 30 October 1974 as the Yūrakuchō Line.", "tier": "tertiary", "title": "Yūrakuchō Line — Wikipedia (EN)", "url": "https://en.wikipedia.org/wiki/Yurakucho_Line_(Tokyo_Metro)" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260226202217/https://metroarchive.jp/content/ebook_yurakucho.html/", "kind": "primary", "publisher": "Tokyo Metro (metroarchive.jp)", "quote": "工事は1970（昭和45）年8月、有楽町線の第1期工事区間となる池袋～明石町（新富町）間の土木工事に着手し", "tier": "primary", "title": "東京地下鉄道有楽町線建設史 (Yurakucho Line Construction History) — Metro Archive", "url": "https://metroarchive.jp/content/ebook_yurakucho.html/", "via": "https://en.wikipedia.org/wiki/Y%C5%ABrakuch%C5%8D_Line_(Tokyo_Metro)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260317145719/https://metroarchive.jp/content/yurakucho.html/", "kind": "primary", "publisher": "公益財団法人メトロ文化財団 (Metro Culture Foundation)", "quote": "1974（昭和49）年10月30日 池袋～銀座一丁目10.2キロの区間を開業しました", "tier": "primary", "title": "有楽町線の歴史 — メトロアーカイブアルバム (Metro Archive Album)", "url": "https://metroarchive.jp/content/yurakucho.html/", "via": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9C%89%E6%A5%BD%E7%94%BA%E7%B7%9A" } ], "stationCount": 6 }, { "confidence": "medium", "geometryRef": "tokyo-Y", "id": "tokyo-y-19800327", "kind": "extension", "label": { "en": "Stage 2 opens: Ginza-itchome → Shintomichō (extension)" }, "opened": "1980-03-27", "segment": { "fromStopIndex": 18, "toStopIndex": 19 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260605083424/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9C%89%E6%A5%BD%E7%94%BA%E7%B7%9A", "kind": "wikipedia", "quote": "1980年（昭和55年）3月27日：銀座一丁目 - 新富町間開業", "tier": "tertiary", "title": "東京メトロ有楽町線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ有楽町線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260611125921/https://en.wikipedia.org/wiki/Yurakucho_Line_(Tokyo_Metro)", "kind": "wikipedia", "quote": "On 27 March 1980, the second section between Ginza-itchōme and Shintomichō section opened.", "tier": "tertiary", "title": "Yūrakuchō Line — Wikipedia (EN)", "url": "https://en.wikipedia.org/wiki/Yurakucho_Line_(Tokyo_Metro)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260317145719/https://metroarchive.jp/content/yurakucho.html/", "kind": "primary", "publisher": "公益財団法人メトロ文化財団 (Metro Culture Foundation)", "quote": "1980（昭和55）年3月27日 銀座一丁目～新富町0.7キロの区間を開業しました", "tier": "primary", "title": "有楽町線の歴史 — メトロアーカイブアルバム (Metro Archive Album)", "url": "https://metroarchive.jp/content/yurakucho.html/", "via": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9C%89%E6%A5%BD%E7%94%BA%E7%B7%9A" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "tokyo-Y", "id": "tokyo-y-19830624", "kind": "extension", "label": { "en": "Stage 3 opens: Eidan-narimasu → Ikebukuro (northwest extension)" }, "notes": "[Opening-date chase 2026-06-13] 10-car operation began as a trial run on 1983-06-17, one week before revenue opening on 1983-06-24; the curated date is the revenue-service opening.", "opened": "1983-06-24", "segment": { "fromStopIndex": 1, "toStopIndex": 8 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260605083424/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9C%89%E6%A5%BD%E7%94%BA%E7%B7%9A", "kind": "wikipedia", "quote": "1983年（昭和58年）6月24日：営団成增（現・地下鉄成增） - 池袋間開業", "tier": "tertiary", "title": "東京メトロ有楽町線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ有楽町線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260611125921/https://en.wikipedia.org/wiki/Yurakucho_Line_(Tokyo_Metro)", "kind": "wikipedia", "quote": "The third section between Eidan-narimasu (now Chikatetsu-narimasu) and Ikebukuro opened on 24 June 1983.", "tier": "tertiary", "title": "Yūrakuchō Line — Wikipedia (EN)", "url": "https://en.wikipedia.org/wiki/Yurakucho_Line_(Tokyo_Metro)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260317145719/https://metroarchive.jp/content/yurakucho.html/", "kind": "primary", "publisher": "公益財団法人メトロ文化財団 (Metro Culture Foundation)", "quote": "1983（昭和58）年6月24日 営団成増（現・地下鉄成増）～池袋9.3キロの区間を開業しました", "tier": "primary", "title": "有楽町線の歴史 — メトロアーカイブアルバム (Metro Archive Album)", "url": "https://metroarchive.jp/content/yurakucho.html/", "via": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9C%89%E6%A5%BD%E7%94%BA%E7%B7%9A" } ], "stationCount": 5 }, { "confidence": "medium", "geometryRef": "tokyo-Y", "id": "tokyo-y-19870825", "kind": "extension", "label": { "en": "Stage 4 opens: Wakōshi → Eidan-narimasu (through service with Tōbu Tōjō Line begins)" }, "opened": "1987-08-25", "segment": { "fromStopIndex": 0, "toStopIndex": 8 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260605083424/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9C%89%E6%A5%BD%E7%94%BA%E7%B7%9A", "kind": "wikipedia", "quote": "1987年（昭和62年）8月25日：和光市 - 営団成增（現・地下鉄成增）間開業。東武東上線との相互乗り入れ開始", "tier": "tertiary", "title": "東京メトロ有楽町線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ有楽町線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260611125921/https://en.wikipedia.org/wiki/Yurakucho_Line_(Tokyo_Metro)", "kind": "wikipedia", "quote": "The northwestern extension to Wakōshi opened on 25 August 1987, allowing through service with the Tōbu Tōjō Line.", "tier": "tertiary", "title": "Yūrakuchō Line — Wikipedia (EN)", "url": "https://en.wikipedia.org/wiki/Yurakucho_Line_(Tokyo_Metro)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260317145719/https://metroarchive.jp/content/yurakucho.html/", "kind": "primary", "publisher": "公益財団法人メトロ文化財団 (Metro Culture Foundation)", "quote": "1987（昭和62）年8月25日 和光市～営団成増（現・地下鉄成増）2.2キロの区間を開業しました", "tier": "primary", "title": "有楽町線の歴史 — メトロアーカイブアルバム (Metro Archive Album)", "url": "https://metroarchive.jp/content/yurakucho.html/", "via": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9C%89%E6%A5%BD%E7%94%BA%E7%B7%9A" } ], "stationCount": 2 }, { "confidence": "medium", "geometryRef": "tokyo-Y", "id": "tokyo-y-19880608", "kind": "extension", "label": { "en": "Stage 5 opens: Shintomichō → Shin-kiba (full line completed; adds Tsukishima, Toyosu, Tatsumi)" }, "notes": "[Opening-date chase 2026-06-13] Same-day Kotsu Shimbun (交通新聞) front-page report dated 1988-06-08 corroborates the full-line opening; offline newspaper source, not web-archivable.", "opened": "1988-06-08", "segment": { "fromStopIndex": 19, "toStopIndex": 23 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260605083424/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9C%89%E6%A5%BD%E7%94%BA%E7%B7%9A", "kind": "wikipedia", "quote": "1988年（昭和63年）6月8日：新富町 - 新木場間開業、全線開業", "tier": "tertiary", "title": "東京メトロ有楽町線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ有楽町線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260611125921/https://en.wikipedia.org/wiki/Yurakucho_Line_(Tokyo_Metro)", "kind": "wikipedia", "quote": "The final section from Shintomichō to Shin-kiba opened on 8 June 1988, completing the current line.", "tier": "tertiary", "title": "Yūrakuchō Line — Wikipedia (EN)", "url": "https://en.wikipedia.org/wiki/Yurakucho_Line_(Tokyo_Metro)" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260317145719/https://metroarchive.jp/content/yurakucho.html/", "kind": "primary", "publisher": "公益財団法人メトロ文化財団 (Metro Culture Foundation)", "quote": "1988（昭和63）年6月8日、和光市～新木場間28.3キロ全線が開業しました", "tier": "primary", "title": "有楽町線の歴史 — メトロアーカイブアルバム (Metro Archive Album)", "url": "https://metroarchive.jp/content/yurakucho.html/", "via": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9C%89%E6%A5%BD%E7%94%BA%E7%B7%9A" } ], "stationCount": 3 } ], "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260605083424/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E6%9C%89%E6%A5%BD%E7%94%BA%E7%B7%9A", "kind": "wikipedia", "quote": "1974年（昭和49年）10月30日：池袋 - 銀座一丁目間開業。開業当初の同区間の運賃は80円。7000系5両編成で運行された。", "tier": "tertiary", "title": "東京メトロ有楽町線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ有楽町線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260611125921/https://en.wikipedia.org/wiki/Yurakucho_Line_(Tokyo_Metro)", "kind": "wikipedia", "quote": "The initial section began construction in 1970 and opened for revenue service on 30 October 1974 as the Yūrakuchō Line.", "tier": "tertiary", "title": "Yūrakuchō Line — Wikipedia (EN)", "url": "https://en.wikipedia.org/wiki/Yurakucho_Line_(Tokyo_Metro)" } ] }, { "cityId": "tokyo", "color": "#8F76D6", "displayNumber": "Z", "id": "tokyo-line-z", "name": { "en": "Hanzomon Line" }, "phases": [ { "confidence": "medium", "constructionStart": "1973", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "JPY", "isEstimate": false, "value": 254500000000, "year": 1990 }, "notes": "Figure of 2,545 億円 (254.5 billion yen) covers the ENTIRE Shibuya–Suitengūmae section (10.8 km), NOT this segment alone. It is the cumulative outturn cost of construction running from March 1973 to the November 1990 Suitengūmae opening (17+ years); cost inflated by the oil shock. This single figure spans the 1978, 1979, 1982, 1989 and 1990 phases. Construction works on the line began March 1973.", "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260407010134/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%8A%E8%94%B5%E9%96%80%E7%B7%9A", "kind": "wikipedia", "quote": "1978年8月1日 渋谷～青山一丁目間 (2.7 km) 開業", "tier": "tertiary", "title": "東京メトロ半蔵門線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%8A%E8%94%B5%E9%96%80%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260519123057/https://metroarchive.jp/content/ebook_hanzomon.html/", "kind": "primary", "quote": "渋谷～水天宮前区間（10.8キロ）は、1973年3月の工事着手から1990年11月の全線開業まで17年余りの歳月と、2,545億円にのぼる巨額の費用を要しました。", "tier": "primary", "title": "半蔵門線建設史（渋谷～水天宮前）— メトロアーカイブアルバム (Tokyo Metro archive)", "url": "https://metroarchive.jp/content/ebook_hanzomon.html/" } ] }, "geometryRef": "tokyo-Z", "id": "tokyo-z-19780801", "kind": "initial", "label": { "en": "Stage 1 opens: Shibuya → Aoyama-itchōme (initial section, through-service with Tōkyū)" }, "notes": "[Date chase 2026-06-12] Wikipedia specifies the groundbreaking for the Shibuya-Aoyama-itchome segment (the segment opened in this 1978 phase) as 1973-06-04, with the Aoyama-itchome-Nagatacho segment begun 1973-03-01. [Opening-date chase 2026-06-13] Stage 1 opened as revenue service with simultaneous Tōkyū New-Tamagawa/Den-en-toshi through-running; primary Metro archive confirms month (Aug 1978).", "opened": "1978-08-01", "segment": { "fromStopIndex": 0, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260407010134/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%8A%E8%94%B5%E9%96%80%E7%B7%9A", "kind": "wikipedia", "quote": "1978年8月1日 渋谷～青山一丁目間 (2.7 km) 開業", "tier": "tertiary", "title": "東京メトロ半蔵門線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%8A%E8%94%B5%E9%96%80%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260519123057/https://metroarchive.jp/content/ebook_hanzomon.html/", "kind": "primary", "quote": "渋谷～水天宮前区間（10.8キロ）は、1973年3月の工事着手から1990年11月の全線開業まで17年余りの歳月と、2,545億円にのぼる巨額の費用を要しました。", "tier": "primary", "title": "半蔵門線建設史（渋谷～水天宮前）— メトロアーカイブアルバム (Tokyo Metro archive)", "url": "https://metroarchive.jp/content/ebook_hanzomon.html/" } ], "stationCount": 2 }, { "confidence": "medium", "geometryRef": "tokyo-Z", "id": "tokyo-z-19790921", "kind": "extension", "label": { "en": "Extension: Aoyama-itchōme → Nagatachō (opened single-track)" }, "notes": "[Opening-date chase 2026-06-13] Opened single-track (単線開業) — reduced-capacity but full revenue service from this date, not a ceremonial opening.", "opened": "1979-09-21", "segment": { "fromStopIndex": 2, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260407010134/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%8A%E8%94%B5%E9%96%80%E7%B7%9A", "kind": "wikipedia", "quote": "1979年9月21日 青山一丁目～永田町間 (1.4km) 単線開業", "tier": "tertiary", "title": "東京メトロ半蔵門線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%8A%E8%94%B5%E9%96%80%E7%B7%9A" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "tokyo-Z", "id": "tokyo-z-19821209", "kind": "extension", "label": { "en": "Extension: Nagatachō → Hanzōmon" }, "opened": "1982-12-09", "segment": { "fromStopIndex": 3, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260407010134/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%8A%E8%94%B5%E9%96%80%E7%B7%9A", "kind": "wikipedia", "quote": "1982年12月9日 永田町～半蔵門間 (1.0km) 開業", "tier": "tertiary", "title": "東京メトロ半蔵門線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%8A%E8%94%B5%E9%96%80%E7%B7%9A" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "tokyo-Z", "id": "tokyo-z-19890126", "kind": "extension", "label": { "en": "Extension: Hanzōmon → Mitsukoshimae (around the Imperial Palace)" }, "notes": "[Opening-date chase 2026-06-13] Same-day 交通新聞 (1989-01-26) headline confirms revenue opening; noted as the first railway extension opened in the Heisei era.", "opened": "1989-01-26", "segment": { "fromStopIndex": 4, "toStopIndex": 8 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260407010134/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%8A%E8%94%B5%E9%96%80%E7%B7%9A", "kind": "wikipedia", "quote": "1989年1月26日 半蔵門 - 三越前間 (4.4 km) 開業", "tier": "tertiary", "title": "東京メトロ半蔵門線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%8A%E8%94%B5%E9%96%80%E7%B7%9A" } ], "stationCount": 4 }, { "confidence": "medium", "geometryRef": "tokyo-Z", "id": "tokyo-z-19901128", "kind": "extension", "label": { "en": "Extension: Mitsukoshimae → Suitengūmae" }, "notes": "[Opening-date chase 2026-06-13] Completed the Shibuya–Suitengūmae section (全通); same-day 交通新聞 confirms revenue opening.", "opened": "1990-11-28", "segment": { "fromStopIndex": 8, "toStopIndex": 9 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260407010134/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%8A%E8%94%B5%E9%96%80%E7%B7%9A", "kind": "wikipedia", "quote": "1990年11月28日 三越前～水天宮前間 (1.3km) 開業", "tier": "tertiary", "title": "東京メトロ半蔵門線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%8A%E8%94%B5%E9%96%80%E7%B7%9A" } ], "stationCount": 1 }, { "confidence": "medium", "constructionStart": "1993", "geometryRef": "tokyo-Z", "id": "tokyo-z-20030319", "kind": "extension", "label": { "en": "Extension: Suitengūmae → Oshiage (through-service with Tōbu)" }, "notes": "[Date chase 2026-06-12] Wikipedia gives the precise construction-start date of 1993-12-06 for the Suitengumae-Oshiage extension; the Tokyo Metro archive corroborates December 1993. [Opening-date chase 2026-06-13] Last new section opened by the Eidan (営団); primary archive also confirms Dec-1993 construction start, consistent with curated constructionStart 1993.", "opened": "2003-03-19", "segment": { "fromStopIndex": 9, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260407010134/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%8A%E8%94%B5%E9%96%80%E7%B7%9A", "kind": "wikipedia", "quote": "2003年3月19日 水天宮前 - 押上間 (6.0 km) 開業", "tier": "tertiary", "title": "東京メトロ半蔵門線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%8A%E8%94%B5%E9%96%80%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260427054508/https://metroarchive.jp/content/ebook_hanzomon_oshiage.html/", "kind": "primary", "quote": "1993年（平成5年）6月に第1種鉄道事業免許を営団が取得し、同年12月には工事が着手され、2003年（平成15年）3月19日開業に至りました。", "tier": "primary", "title": "半蔵門線建設史（水天宮前～押上）— メトロアーカイブアルバム (Tokyo Metro archive)", "url": "https://metroarchive.jp/content/ebook_hanzomon_oshiage.html/" } ], "stationCount": 4 } ], "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260407010134/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%8A%E8%94%B5%E9%96%80%E7%B7%9A", "kind": "wikipedia", "quote": "1978年8月1日 渋谷～青山一丁目間 (2.7 km) 開業", "tier": "tertiary", "title": "東京メトロ半蔵門線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%8A%E8%94%B5%E9%96%80%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260519123057/https://metroarchive.jp/content/ebook_hanzomon.html/", "kind": "primary", "quote": "渋谷～水天宮前区間（10.8キロ）は、1973年3月の工事着手から1990年11月の全線開業まで17年余りの歳月と、2,545億円にのぼる巨額の費用を要しました。", "tier": "primary", "title": "半蔵門線建設史（渋谷～水天宮前）— メトロアーカイブアルバム (Tokyo Metro archive)", "url": "https://metroarchive.jp/content/ebook_hanzomon.html/" } ] }, { "cityId": "tokyo", "color": "#00AC9B", "displayNumber": "N", "id": "tokyo-line-n", "name": { "en": "Namboku Line" }, "phases": [ { "confidence": "medium", "constructionStart": "1986", "geometryRef": "tokyo-N", "id": "tokyo-n-19911129", "kind": "initial", "label": { "en": "Stage 1 opens: Komagome → Akabane-Iwabuchi (6.3 km)" }, "notes": "[Date chase 2026-06-12] Construction approved 1986-01-21 and commenced 1986-02-01 (Komagome-Iwabuchi-cho section), per operator's official construction history 東京地下鉄道南北線建設史 p.19 and 鉄道ジャーナル通巻414号 p.144 (cited via JA Wikipedia).", "opened": "1991-11-29", "segment": { "fromStopIndex": 0, "toStopIndex": 5 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260329061202/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%97%E5%8C%97%E7%B7%9A", "kind": "wikipedia", "quote": "駒込 - 赤羽岩淵間 (6.3 km) 開業", "tier": "tertiary", "title": "東京メトロ南北線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%97%E5%8C%97%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20251218080706/https://en.wikipedia.org/wiki/Tokyo_Metro_Namboku_Line", "kind": "wikipedia", "quote": "The first segment from Komagome to Akabane-Iwabuchi opened on 29 November 1991.", "tier": "tertiary", "title": "Tokyo Metro Namboku Line — Wikipedia (EN)", "url": "https://en.wikipedia.org/wiki/Tokyo_Metro_Namboku_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260317153446/https://metroarchive.jp/content/ebook_nanboku.html/", "kind": "primary", "publisher": "帝都高速度交通営団 (Teito Rapid Transit Authority)", "quote": "1986（昭和61）年2月より工事に着手しました (Construction work began in February 1986 [Showa 61])", "tier": "primary", "title": "東京地下鉄道南北線建設史 (Tokyo Metro Namboku Line Construction History)", "url": "https://metroarchive.jp/content/ebook_nanboku.html/", "via": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%97%E5%8C%97%E7%B7%9A" } ], "stationCount": 6 }, { "confidence": "low", "geometryRef": "tokyo-N", "id": "tokyo-n-19960326", "kind": "extension", "label": { "en": "Stage 2 opens: Yotsuya → Komagome (7.1 km)" }, "opened": "1996-03-26", "segment": { "fromStopIndex": 5, "toStopIndex": 11 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260329061202/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%97%E5%8C%97%E7%B7%9A", "kind": "wikipedia", "quote": "四ツ谷 - 駒込間 (7.1 km) 開業", "tier": "tertiary", "title": "東京メトロ南北線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%97%E5%8C%97%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20251218080706/https://en.wikipedia.org/wiki/Tokyo_Metro_Namboku_Line", "kind": "wikipedia", "quote": "Upon its extension to Yotsuya in March 1996, the formations were extended to six cars.", "tier": "tertiary", "title": "Tokyo Metro Namboku Line — Wikipedia (EN)", "url": "https://en.wikipedia.org/wiki/Tokyo_Metro_Namboku_Line" } ], "stationCount": 6 }, { "confidence": "medium", "geometryRef": "tokyo-N", "id": "tokyo-n-19970930", "kind": "extension", "label": { "en": "Stage 3 opens: Tameike-Sannō → Yotsuya (2.2 km)" }, "opened": "1997-09-30", "segment": { "fromStopIndex": 11, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260329061202/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%97%E5%8C%97%E7%B7%9A", "kind": "wikipedia", "quote": "溜池山王 - 四ツ谷間 (2.2 km) 開業", "tier": "tertiary", "title": "東京メトロ南北線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%97%E5%8C%97%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20251218080706/https://en.wikipedia.org/wiki/Tokyo_Metro_Namboku_Line", "kind": "wikipedia", "quote": "the extension to Tameike-Sannō completed in September 1997", "tier": "tertiary", "title": "Tokyo Metro Namboku Line — Wikipedia (EN)", "url": "https://en.wikipedia.org/wiki/Tokyo_Metro_Namboku_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20010105173300/http://www.tokyometro.go.jp:80/news/97-17.html", "kind": "primary", "publisher": "帝都高速度交通営団 (Tokyo Metro predecessor)", "quote": "平成9年9月30日（火）南北線四ツ谷・溜池山王間 銀座線溜池山王駅が開業いたします (The Namboku Line Yotsuya–Tameike-Sanno section and Ginza Line Tameike-Sanno station will open on Tuesday, September 30, Heisei 9 [1997])", "tier": "primary", "title": "人にやさしい、より便利な地下鉄を目指して 平成9年9月30日（火）南北線四ツ谷・溜池山王間 銀座線溜池山王駅が開業いたします — 営団地下鉄 press release", "url": "http://www.tokyometro.go.jp/news/97-17.html", "via": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%97%E5%8C%97%E7%B7%9A" } ], "stationCount": 2 }, { "confidence": "medium", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "JPY", "isEstimate": false, "value": 596389000000, "year": 2000 }, "notes": "Final outturn for the ENTIRE original Namboku Line (Meguro–Akabane-Iwabuchi, 19 stations), NOT this 5.7 km segment alone. Total ¥596.389 billion includes construction interest but EXCLUDES consumption tax. Breakdown per JA sources: land acquisition ¥38.367bn, civil works ¥332.024bn, rolling stock ¥32.984bn, other ¥193.014bn. Price-year tagged as 2000 (full-line completion); the figure is a cumulative final amount spanning the 1986–2000 build, not a single price-year deflated value. [Citation chase 2026-06-11] Value 「最終的な金額」 (final amount) per 帝都高速度交通営団史 p.521 (Tokyo Metro, Dec 2004); the verifiable confirmation is via JA Wikipedia only, as the cited primary book is offline. A companion source (南北線建設史 p.42) gives ¥560.4bn as of end-March 2001, reflecting an earlier cutoff and partial estimates, not a contradiction.", "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260329061202/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%97%E5%8C%97%E7%B7%9A", "kind": "wikipedia", "quote": "本路線の建設費用は総額5,963冄8,900万円である", "tier": "tertiary", "title": "東京メトロ南北線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%97%E5%8C%97%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20251218080706/https://en.wikipedia.org/wiki/Tokyo_Metro_Namboku_Line", "kind": "wikipedia", "quote": "the last stretch from Tameike-Sanno to Meguro completed on September 26, 2000, when through service to the Tokyu Meguro Line started.", "tier": "tertiary", "title": "Tokyo Metro Namboku Line — Wikipedia (EN)", "url": "https://en.wikipedia.org/wiki/Tokyo_Metro_Namboku_Line" } ] }, "geometryRef": "tokyo-N", "id": "tokyo-n-20000926", "kind": "extension", "label": { "en": "Stage 4 (final) opens: Meguro → Tameike-Sannō (5.7 km) — full line complete, through service with Tokyu Meguro Line begins" }, "notes": "[Opening-date chase 2026-06-13] Sep 22–25 timetable preview ran the new segment as non-revenue 回送 (deadhead) trains; public revenue opening was Sep 26 (full line complete, through service with Tokyu Meguro Line began).", "opened": "2000-09-26", "segment": { "fromStopIndex": 13, "toStopIndex": 17 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260329061202/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%97%E5%8C%97%E7%B7%9A", "kind": "wikipedia", "quote": "本路線の建設費用は総額5,963冄8,900万円である", "tier": "tertiary", "title": "東京メトロ南北線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%97%E5%8C%97%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20251218080706/https://en.wikipedia.org/wiki/Tokyo_Metro_Namboku_Line", "kind": "wikipedia", "quote": "the last stretch from Tameike-Sanno to Meguro completed on September 26, 2000, when through service to the Tokyu Meguro Line started.", "tier": "tertiary", "title": "Tokyo Metro Namboku Line — Wikipedia (EN)", "url": "https://en.wikipedia.org/wiki/Tokyo_Metro_Namboku_Line" }, { "accessedAt": "2026-06-13", "kind": "primary", "publisher": "帝都高速度交通営団／東京急行電鉄／東京都交通局 (Tokyo Metro predecessor joint press release)", "quote": "平成12年9月26日 営団南北線 溜池山王・目黒間、都営三田線 三田・目黒間開業 東急目黒線との相互直通運転開始 (September 26, Heisei 12 [2000]: Namboku Line Tameike-Sanno–Meguro and Toei Mita Line Mita–Meguro open; mutual through-service with Tokyu Meguro Line begins)", "tier": "primary", "title": "平成12年9月26日 営団南北線 溜池山王・目黒間、都営三田線 三田・目黒間開業 東急目黒線との相互直通運転開始 開業区間の運賃及び相互直通運転に伴う運行形態を決定 — 帝都高速度交通営団 press release", "url": "http://www.tokyometro.go.jp/news/2000-s02.html", "via": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%97%E5%8C%97%E7%B7%9A" } ], "stationCount": 5 } ], "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260329061202/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%97%E5%8C%97%E7%B7%9A", "kind": "wikipedia", "quote": "駒込 - 赤羽岩淵間 (6.3 km) 開業", "tier": "tertiary", "title": "東京メトロ南北線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%8D%97%E5%8C%97%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20251218080706/https://en.wikipedia.org/wiki/Tokyo_Metro_Namboku_Line", "kind": "wikipedia", "quote": "The first segment from Komagome to Akabane-Iwabuchi opened on 29 November 1991.", "tier": "tertiary", "title": "Tokyo Metro Namboku Line — Wikipedia (EN)", "url": "https://en.wikipedia.org/wiki/Tokyo_Metro_Namboku_Line" } ] }, { "cityId": "tokyo", "color": "#9C5E31", "displayNumber": "F", "id": "tokyo-line-f", "name": { "en": "Fukutoshin Line" }, "phases": [ { "confidence": "medium", "constructionStart": "1977", "geometryRef": "tokyo-F", "id": "tokyo-f-19941207", "kind": "initial", "label": { "en": "Stage 1 opens: Kotake-Mukaihara → (Shin-Sen) Ikebukuro, as the Yurakucho New Line (quadruple-tracked, separate tracks parallel to Yurakucho Line)" }, "notes": "[Date chase 2026-06-12] Operator-published primary sources corroborate 1977: 東京地下鉄道有楽町線建設史 (Yurakucho Line Construction History, p.67) cited for the 1977-04-08 start of the shared section, and pp.1075–1078 plus 帝都高速度交通営団史 pp.195–196 for the September 1977 approval/commencement. The two JA-Wikipedia statements differ on the within-year date (April 8 timeline vs September prose) but agree on year 1977. [Opening-date chase 2026-06-13] Segment opened as the 'Yurakucho New Line' (有楽町線新線); intermediate Senkawa and Kanamecho platforms were bypassed (passed without stopping) at this opening.", "opened": "1994-12-07", "segment": { "fromStopIndex": 5, "toStopIndex": 8 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260606211746/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%89%AF%E9%83%BD%E5%BF%83%E7%B7%9A", "kind": "wikipedia", "quote": "1994年（平成6年）12月7日：小竹向原 - 池袋（新線池袋）間を有楽町線の複々線（有楽町線新線）として開業", "tier": "tertiary", "title": "東京メトロ副都心線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ副都心線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260606211746/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%89%AF%E9%83%BD%E5%BF%83%E7%B7%9A", "kind": "wikipedia", "quote": "1977年（昭和52年）9月に小竹向原 - 池袋間を複々線とする工事計画変更認可を受け、同区間の建設工事に着手した", "tier": "tertiary", "title": "東京メトロ副都心線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ副都心線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260307214043/https://en.wikipedia.org/wiki/Tokyo_Metro_Fukutoshin_Line", "kind": "wikipedia", "quote": "A 3.2 km segment from Kotake-Mukaihara to Ikebukuro opened on 7 December 1994 operating as the Yūrakuchō New Line with no intermediate stops.", "tier": "tertiary", "title": "Tokyo Metro Fukutoshin Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Tokyo_Metro_Fukutoshin_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260226202217/https://metroarchive.jp/content/ebook_yurakucho.html/", "kind": "primary", "publisher": "帝都高速度交通営団 (Teito Rapid Transit Authority)", "quote": "Cited as: 東京地下鉄道有楽町線建設史、p.67「小竹一工区 - 西池袋三工区」— referenced for the 1977年4月8日 construction start of the shared Kotake-Mukaihara–Shin-Ikebukuro section.", "tier": "primary", "title": "東京地下鉄道有楽町線建設史 (Tokyo Metro Yurakucho Line Construction History), p.67 「小竹一工区 - 西池袋三工区」", "url": "https://metroarchive.jp/content/ebook_yurakucho.html/", "via": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%89%AF%E9%83%BD%E5%BF%83%E7%B7%9A" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260226202217/https://metroarchive.jp/content/ebook_yurakucho.html/", "kind": "primary", "publisher": "帝都高速度交通営団 (Teito Rapid Transit Authority)", "quote": "Cited as: 東京地下鉄道有楽町線建設史、pp.1075–1078 — referenced for the September 1977 construction approval and commencement statement.", "tier": "primary", "title": "東京地下鉄道有楽町線建設史 (Tokyo Metro Yurakucho Line Construction History), pp.1075–1078", "url": "https://metroarchive.jp/content/ebook_yurakucho.html/", "via": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%89%AF%E9%83%BD%E5%BF%83%E7%B7%9A" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260226202217/https://metroarchive.jp/content/ebook_yurakucho.html/", "kind": "primary", "publisher": "東京地下鉄 (Tokyo Metro)", "quote": "Cited as: 帝都高速度交通営団史、pp.195–196 — co-cited with Yurakucho-Const1075 for the September 1977 construction commencement of the Kotake-Mukaihara–Ikebukuro section.", "tier": "primary", "title": "帝都高速度交通営団史 (History of the Teito Rapid Transit Authority), pp.195–196", "url": "https://metroarchive.jp/content/ebook_yurakucho.html/", "via": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%89%AF%E9%83%BD%E5%BF%83%E7%B7%9A" } ], "stationCount": 2 }, { "confidence": "high", "constructionStart": "2001", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "JPY", "isEstimate": false, "value": 240400000000, "year": 2008 }, "notes": "Total construction cost of the Ikebukuro–Shibuya section only, excluding consumption tax (¥240.4 billion). Breakdown: civil works ¥177,351,443,000; electrical ¥24,826,629,000; rolling stock ¥17,080,658,000; other ¥21,141,270,000. Does NOT cover the 1994 Kotake-Mukaihara–Ikebukuro section.", "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260606211746/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%89%AF%E9%83%BD%E5%BF%83%E7%B7%9A", "kind": "wikipedia", "quote": "本路線のうち池袋 - 渋谷間の建設に要した建設費用は総額2,404億円（消費税除く）である", "tier": "tertiary", "title": "東京メトロ副都心線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ副都心線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260606211746/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%89%AF%E9%83%BD%E5%BF%83%E7%B7%9A", "kind": "wikipedia", "quote": "2008年6月14日：副都心線 池袋駅 - 渋谷間が開業", "tier": "tertiary", "title": "東京メトロ副都心線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ副都心線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260606211746/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%89%AF%E9%83%BD%E5%BF%83%E7%B7%9A", "kind": "wikipedia", "quote": "2001年6月15日に同区間の建設が開始された", "tier": "tertiary", "title": "東京メトロ副都心線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ副都心線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260307214043/https://en.wikipedia.org/wiki/Tokyo_Metro_Fukutoshin_Line", "kind": "wikipedia", "quote": "The central section opened on 14 June 2008. This segment connected the districts of Shinjuku and Shibuya via Zōshigaya, Shinjuku-sanchōme, and Meiji-Jingūmae and officially completed the line.", "tier": "tertiary", "title": "Tokyo Metro Fukutoshin Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Tokyo_Metro_Fukutoshin_Line" } ] }, "geometryRef": "tokyo-F", "id": "tokyo-f-20080614", "kind": "extension", "label": { "en": "Stage 2 opens: Ikebukuro → Shibuya — line becomes the Fukutoshin Line in full (via Zoshigaya, Nishi-waseda, Higashi-shinjuku, Shinjuku-sanchome, Kitasando, Meiji-jingumae); bypassed Senkawa & Kanamecho stops also brought into service" }, "notes": "[Date chase 2026-06-12] Operator-published primary source 東京地下鉄道副都心線建設史 (Fukutoshin Line Construction History, Tokyo Metro, 2009, pp.22–31 prose and pp.31·34 timeline) corroborates the 2001-06-15 construction start of the Ikebukuro–Shibuya section. English Wikipedia carries no construction-start year for this phase. [Opening-date chase 2026-06-13] A dedication/departure ceremony was held June 13, 2008 at Shinjuku-sanchome; this was ceremonial. Revenue (public) service began June 14, 2008.", "opened": "2008-06-14", "segment": { "fromStopIndex": 8, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260606211746/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%89%AF%E9%83%BD%E5%BF%83%E7%B7%9A", "kind": "wikipedia", "quote": "本路線のうち池袋 - 渋谷間の建設に要した建設費用は総額2,404億円（消費税除く）である", "tier": "tertiary", "title": "東京メトロ副都心線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ副都心線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260606211746/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%89%AF%E9%83%BD%E5%BF%83%E7%B7%9A", "kind": "wikipedia", "quote": "2008年6月14日：副都心線 池袋駅 - 渋谷間が開業", "tier": "tertiary", "title": "東京メトロ副都心線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ副都心線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260606211746/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%89%AF%E9%83%BD%E5%BF%83%E7%B7%9A", "kind": "wikipedia", "quote": "2001年6月15日に同区間の建設が開始された", "tier": "tertiary", "title": "東京メトロ副都心線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ副都心線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260307214043/https://en.wikipedia.org/wiki/Tokyo_Metro_Fukutoshin_Line", "kind": "wikipedia", "quote": "The central section opened on 14 June 2008. This segment connected the districts of Shinjuku and Shibuya via Zōshigaya, Shinjuku-sanchōme, and Meiji-Jingūmae and officially completed the line.", "tier": "tertiary", "title": "Tokyo Metro Fukutoshin Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Tokyo_Metro_Fukutoshin_Line" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260317160341/https://metroarchive.jp/content/ebook_fukutoshin.html/", "kind": "primary", "publisher": "東京地下鉄 (Tokyo Metro)", "quote": "Cited as: 東京地下鉄道副都心線建設史、pp.22–31 (for 2001年6月15日 construction start prose) and pp.31·34 (for 2001年6月15日 timeline entry 建設工事に着手). Published 2009-03-31 by Tokyo Metro.", "tier": "primary", "title": "東京地下鉄道副都心線建設史 (Tokyo Metro Fukutoshin Line Construction History), pp.22–31 and pp.31·34", "url": "https://metroarchive.jp/content/ebook_fukutoshin.html/", "via": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%89%AF%E9%83%BD%E5%BF%83%E7%B7%9A" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20250214081620/https://www.tokyometro.jp/news/2008/2008-17.html", "kind": "primary", "publisher": "東京地下鉄 (Tokyo Metro)", "quote": "平成20年6月14日（土）副都心線開業 [cited in JA Wikipedia as ref 'pr20080327' for the June 14, 2008 opening; press release title includes '平成20年6月14日（土）副都心線開業']", "tier": "primary", "title": "副都心線・有楽町線のダイヤが決定！ (Fukutoshin Line and Yurakucho Line timetables decided) — Tokyo Metro press release, 27 March 2008", "url": "http://www.tokyometro.jp/news/2008/2008-17.html", "via": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%89%AF%E9%83%BD%E5%BF%83%E7%B7%9A" } ], "stationCount": 7 }, { "confidence": "high", "geometryRef": null, "id": "tokyo-f-20130316", "kind": "extension", "label": { "en": "Through-service connection: Shibuya terminus linked to Tokyu Toyoko Line / Yokohama Minatomirai Line (no new Metro stations; reciprocal through-running to Motomachi-Chukagai begins)" }, "notes": "Through-running connection to Tōkyū/Minatomirai — no new Metro track. [Opening-date chase 2026-06-13] This phase is a through-service timetable revision (ダイヤ改正) commencing reciprocal through-running with the Tokyu Toyoko / Yokohama Minatomirai Line, not the opening of new Tokyo Metro stations.", "opened": "2013-03-16", "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260606211746/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%89%AF%E9%83%BD%E5%BF%83%E7%B7%9A", "kind": "wikipedia", "quote": "ダイヤ改正により、東急東横線・横浜高速鉄道みなとみらい線との相互直通運転開始", "tier": "tertiary", "title": "東京メトロ副都心線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ副都心線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260307214043/https://en.wikipedia.org/wiki/Tokyo_Metro_Fukutoshin_Line", "kind": "wikipedia", "quote": "From 16 March 2013, the Tōkyū Tōyoko Line moved to share the line's Shibuya terminus, enabling through services to Motomachi-Chūkagai in Yokohama via the Minatomirai Line.", "tier": "tertiary", "title": "Tokyo Metro Fukutoshin Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Tokyo_Metro_Fukutoshin_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260613164526/https://www.mm21railway.co.jp/info/news/uploads/20130122press.pdf", "kind": "primary", "publisher": "横浜高速鉄道株式会社 (Yokohama High Speed Railway Co., Ltd.)", "quote": "平成25年3月16日(土)に予定している東京メトロ副都心線、東武東上線、西武有楽町線・池袋線との相互直通運転開始に合わせて、みなとみらい線のダイヤ改正を実施します。", "tier": "primary", "title": "横浜高速鉄道 記者発表資料 (Yokohama Minatomirai Railway press release), 2013-01-22", "url": "https://www.mm21railway.co.jp/info/news/uploads/20130122press.pdf", "via": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%89%AF%E9%83%BD%E5%BF%83%E7%B7%9A" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20210830235410/https://www.tokyu.co.jp/file/120724-1.pdf", "kind": "primary", "publisher": "東京急行電鉄 (Tokyu Corporation)", "quote": "[Title of press release as cited in JA Wikipedia: '東急東横線と東京メトロ副都心線 相互直通運転の開始日が2013年3月16日に決定!'; URL returns 404 at original location but is archived]", "tier": "primary", "title": "東急東横線と東京メトロ副都心線 相互直通運転の開始日が2013年3月16日に決定！ — Tokyu press release, 2012-07-24", "url": "https://www.tokyu.co.jp/file/120724-1.pdf", "via": "https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%89%AF%E9%83%BD%E5%BF%83%E7%B7%9A" } ] } ], "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260606211746/https://ja.wikipedia.org/wiki/%E6%9D%B1%E4%BA%AC%E3%83%A1%E3%83%88%E3%83%AD%E5%89%AF%E9%83%BD%E5%BF%83%E7%B7%9A", "kind": "wikipedia", "quote": "1994年（平成6年）12月7日：小竹向原 - 池袋（新線池袋）間を有楽町線の複々線（有楽町線新線）として開業", "tier": "tertiary", "title": "東京メトロ副都心線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/東京メトロ副都心線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260307214043/https://en.wikipedia.org/wiki/Tokyo_Metro_Fukutoshin_Line", "kind": "wikipedia", "quote": "A 3.2 km segment from Kotake-Mukaihara to Ikebukuro opened on 7 December 1994 operating as the Yūrakuchō New Line with no intermediate stops.", "tier": "tertiary", "title": "Tokyo Metro Fukutoshin Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Tokyo_Metro_Fukutoshin_Line" } ] }, { "cityId": "tokyo", "color": "#E85298", "displayNumber": "A", "id": "tokyo-line-a", "name": { "en": "Toei Asakusa Line" }, "phases": [ { "confidence": "medium", "constructionStart": "1958", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "JPY", "isEstimate": false, "value": 82255690000, "year": 1968 }, "notes": "Figure is the total construction cost of the ENTIRE Asakusa Line (Line 1, Oshiage–Nishi-Magome), NOT this opening segment alone. ¥82,255,690,000 (822億5,569万円); main breakdown: track ¥55.34bn, land/rights ¥9.24bn, overhead/interest ¥8.24bn, rolling stock ¥3.33bn. JA Wikipedia gives no explicit price-level year; tagged 1968 as the full-line completion year (cost is cumulative). Construction of Line 1 began 27 Aug 1958 (the 1956 date in EN Wikipedia refers to the 1956 urban-transport council recommendation, not groundbreaking). [Citation chase 2026-06-11] Cost is an outturn (actual final) figure: it is reported with a full cost breakdown in the Tokyo Metropolitan Bureau of Transportation's 1971 construction-history book \"都営地下鉄建設史-1号線-\" (p. 243), cited via JA Wikipedia; that primary source is offline and was not directly verified, and the 1968 price-year remains an unsourced editorial inference.", "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260401001050/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A", "kind": "wikipedia", "quote": "8月27日：地下鉄1号線最初の建設工事を開始 ... 都営1号線として押上駅-浅草橋駅間(3.2 km)開業", "tier": "tertiary", "title": "都営地下鉄浅草線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260513201644/https://en.wikipedia.org/wiki/Toei_Asakusa_Line", "kind": "wikipedia", "quote": "the initial 3.2 km (2.0 mi) segment between Oshiage and Asakusabashi opened on 4 December 1960", "tier": "tertiary", "title": "Toei Asakusa Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_Asakusa_Line" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260401001050/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A", "kind": "wikipedia", "quote": "本路線の建設費用は822億5,569万円である。主な内訳は、線路費が553億4,195万円、用地買収・権利設定費用が92億4,443万円", "tier": "tertiary", "title": "都営地下鉄浅草線 — Wikipedia (JA) (cost)", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%b6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20260613164700/https://ndlsearch.ndl.go.jp/books/R100000002-I000000817699", "kind": "primary", "publisher": "東京都交通局 (Tokyo Metropolitan Bureau of Transportation)", "tier": "primary", "title": "都営地下鉄建設史-1号線- (Toei Subway Construction History – Line 1)", "url": "https://ndlsearch.ndl.go.jp/books/R100000002-I000000817699", "via": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A" } ] }, "geometryRef": "tokyo-A", "id": "tokyo-a-19601204", "kind": "initial", "label": { "en": "Stage 1 opens: Oshiage → Asakusabashi (Line 1 initial section, through service with Keisei begins)" }, "notes": "[Date chase 2026-06-12] EN Wikipedia lists an uncited '27 August 1956' construction start that conflicts with the official 1958 date; 1956 was the year of the Urban Transport Council Answer No.1 planning report, not groundbreaking. Toei operator history confirms 1958 license acquisition (prerequisite to construction) and 1960 opening.", "opened": "1960-12-04", "segment": { "fromStopIndex": 14, "toStopIndex": 18 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260401001050/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A", "kind": "wikipedia", "quote": "8月27日：地下鉄1号線最初の建設工事を開始 ... 都営1号線として押上駅-浅草橋駅間(3.2 km)開業", "tier": "tertiary", "title": "都営地下鉄浅草線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260513201644/https://en.wikipedia.org/wiki/Toei_Asakusa_Line", "kind": "wikipedia", "quote": "the initial 3.2 km (2.0 mi) segment between Oshiage and Asakusabashi opened on 4 December 1960", "tier": "tertiary", "title": "Toei Asakusa Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_Asakusa_Line" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260401001050/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A", "kind": "wikipedia", "quote": "本路線の建設費用は822億5,569万円である。主な内訳は、線路費が553億4,195万円、用地買収・権利設定費用が92億4,443万円", "tier": "tertiary", "title": "都営地下鉄浅草線 — Wikipedia (JA) (cost)", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%b6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260412085637/https://www.kotsu.metro.tokyo.jp/about/ayumi/subway.html", "kind": "primary", "publisher": "Tokyo Metropolitan Bureau of Transportation (Toei)", "quote": "1958年3月1日：1号線（現・浅草線）の免許を取得 … 1960年12月4日：1号線「押上」～「浅草橋」開業、京成線と相互直通運転を開始", "tier": "primary", "title": "交通局のあゆみ（地下鉄）— Tokyo Metropolitan Bureau of Transportation", "url": "https://www.kotsu.metro.tokyo.jp/about/ayumi/subway.html", "via": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A" } ], "stationCount": 6 }, { "confidence": "medium", "geometryRef": "tokyo-A", "id": "tokyo-a-19620531", "kind": "extension", "label": { "en": "Extension: Asakusabashi → Higashi-Nihombashi (opened as provisional single-track)" }, "notes": "[Opening-date chase 2026-06-13] Opened as provisional single-track (暫定開業) following a ground-subsidence accident; revenue service nonetheless began 1962-05-31.", "opened": "1962-05-31", "segment": { "fromStopIndex": 13, "toStopIndex": 14 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260401001050/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A", "kind": "wikipedia", "quote": "1962年5月31日：浅草橋駅-東日本橋駅間(0.6 km)開業", "tier": "tertiary", "title": "都営地下鉄浅草線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%b6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260513201644/https://en.wikipedia.org/wiki/Toei_Asakusa_Line", "kind": "wikipedia", "quote": "The line was extended to Higashi Nihonbashi in May 1962", "tier": "tertiary", "title": "Toei Asakusa Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_Asakusa_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260412085637/https://www.kotsu.metro.tokyo.jp/about/ayumi/subway.html", "kind": "primary", "publisher": "Tokyo Metropolitan Bureau of Transportation", "quote": "1962年05月31日：1号線「浅草橋」～「東日本橋」開業", "tier": "primary", "title": "交通局のあゆみ（地下鉄）— Tokyo Metropolitan Bureau of Transportation", "url": "https://www.kotsu.metro.tokyo.jp/about/ayumi/subway.html", "via": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "tokyo-A", "id": "tokyo-a-19620930", "kind": "extension", "label": { "en": "Extension: Higashi-Nihombashi → Ningyōchō" }, "notes": "[Opening-date chase 2026-06-13] Same day the Asakusabashi–Higashi-Nihombashi section was upgraded to full double-track.", "opened": "1962-09-30", "segment": { "fromStopIndex": 12, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260401001050/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A", "kind": "wikipedia", "quote": "1962年9月30日：東日本橋駅-人形町駅間(0.7 km)開業", "tier": "tertiary", "title": "都営地下鉄浅草線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%b6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260513201644/https://en.wikipedia.org/wiki/Toei_Asakusa_Line", "kind": "wikipedia", "quote": "to Ningyocho in September", "tier": "tertiary", "title": "Toei Asakusa Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_Asakusa_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260412085637/https://www.kotsu.metro.tokyo.jp/about/ayumi/subway.html", "kind": "primary", "publisher": "Tokyo Metropolitan Bureau of Transportation", "quote": "1962年09月30日：1号線「東日本橋」～「人形町」開業", "tier": "primary", "title": "交通局のあゆみ（地下鉄）— Tokyo Metropolitan Bureau of Transportation", "url": "https://www.kotsu.metro.tokyo.jp/about/ayumi/subway.html", "via": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "tokyo-A", "id": "tokyo-a-19630228", "kind": "extension", "label": { "en": "Extension: Ningyōchō → Higashi-Ginza" }, "notes": "[Opening-date chase 2026-06-13] After opening, trains reversed at the Shiodome signal box ~0.9 km beyond Higashi-Ginza, which had no turnback facility.", "opened": "1963-02-28", "segment": { "fromStopIndex": 9, "toStopIndex": 12 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260401001050/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A", "kind": "wikipedia", "quote": "1963年2月28日：人形町駅-東銀座駅間(2.4 km)開業", "tier": "tertiary", "title": "都営地下鉄浅草線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%b6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260513201644/https://en.wikipedia.org/wiki/Toei_Asakusa_Line", "kind": "wikipedia", "quote": "to Higashi Ginza in February 1963", "tier": "tertiary", "title": "Toei Asakusa Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_Asakusa_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260412085637/https://www.kotsu.metro.tokyo.jp/about/ayumi/subway.html", "kind": "primary", "publisher": "Tokyo Metropolitan Bureau of Transportation", "quote": "1963年02月28日：1号線「人形町」～「東銀座」開業", "tier": "primary", "title": "交通局のあゆみ（地下鉄）— Tokyo Metropolitan Bureau of Transportation", "url": "https://www.kotsu.metro.tokyo.jp/about/ayumi/subway.html", "via": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A" } ], "stationCount": 2 }, { "confidence": "medium", "geometryRef": "tokyo-A", "id": "tokyo-a-19631212", "kind": "extension", "label": { "en": "Extension: Higashi-Ginza → Shimbashi" }, "notes": "[Opening-date chase 2026-06-13] On this date the former Shiodome signal box turnback point was upgraded to a full station (Shimbashi).", "opened": "1963-12-12", "segment": { "fromStopIndex": 8, "toStopIndex": 9 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260401001050/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A", "kind": "wikipedia", "quote": "1963年12月12日：東銀座駅-新橋駅間(0.9 km)開業", "tier": "tertiary", "title": "都営地下鉄浅草線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%b6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260513201644/https://en.wikipedia.org/wiki/Toei_Asakusa_Line", "kind": "wikipedia", "quote": "to Shimbashi in December", "tier": "tertiary", "title": "Toei Asakusa Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_Asakusa_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260412085637/https://www.kotsu.metro.tokyo.jp/about/ayumi/subway.html", "kind": "primary", "publisher": "Tokyo Metropolitan Bureau of Transportation", "quote": "1963年12月12日：1号線「東銀座」～「新橋」開業", "tier": "primary", "title": "交通局のあゆみ（地下鉄）— Tokyo Metropolitan Bureau of Transportation", "url": "https://www.kotsu.metro.tokyo.jp/about/ayumi/subway.html", "via": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "tokyo-A", "id": "tokyo-a-19641001", "kind": "extension", "label": { "en": "Extension: Shimbashi → Daimon (opened as provisional single-track)" }, "notes": "[Opening-date chase 2026-06-13] Opened as provisional single-track 9 days before the Tokyo Olympics; about half of trains turned back at Shimbashi. Full double-track restored 1968-06-15.", "opened": "1964-10-01", "segment": { "fromStopIndex": 7, "toStopIndex": 8 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260401001050/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A", "kind": "wikipedia", "quote": "1964年10月1日：新橋駅-大門駅間(1.1 km)開業", "tier": "tertiary", "title": "都営地下鉄浅草線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%b6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260513201644/https://en.wikipedia.org/wiki/Toei_Asakusa_Line", "kind": "wikipedia", "quote": "to Daimon in October 1964", "tier": "tertiary", "title": "Toei Asakusa Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_Asakusa_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260412085637/https://www.kotsu.metro.tokyo.jp/about/ayumi/subway.html", "kind": "primary", "publisher": "Tokyo Metropolitan Bureau of Transportation", "quote": "1964年10月01日：1号線「新橋」～「大門」開業", "tier": "primary", "title": "交通局のあゆみ（地下鉄）— Tokyo Metropolitan Bureau of Transportation", "url": "https://www.kotsu.metro.tokyo.jp/about/ayumi/subway.html", "via": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A" } ], "stationCount": 1 }, { "confidence": "medium", "geometryRef": "tokyo-A", "id": "tokyo-a-19680621", "kind": "extension", "label": { "en": "Extension: Daimon → Sengakuji (through service with Keikyū / Keihin Kyuko begins)" }, "notes": "[Opening-date chase 2026-06-13] Opening ceremony (開通式) held 1968-06-20 per a Yomiuri Shimbun article; revenue service began 1968-06-21. Through service with Keikyū began the same day.", "opened": "1968-06-21", "segment": { "fromStopIndex": 5, "toStopIndex": 7 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260401001050/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A", "kind": "wikipedia", "quote": "1968年6月21日：大門駅-泉岳寺駅間(2.6 km)開業、京浜急行との相互直通運転開始", "tier": "tertiary", "title": "都営地下鉄浅草線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%b6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260513201644/https://en.wikipedia.org/wiki/Toei_Asakusa_Line", "kind": "wikipedia", "quote": "Daimon to Sengakuji (Through service with Keikyū begins) ... June 1968", "tier": "tertiary", "title": "Toei Asakusa Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_Asakusa_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260412085637/https://www.kotsu.metro.tokyo.jp/about/ayumi/subway.html", "kind": "primary", "publisher": "Tokyo Metropolitan Bureau of Transportation", "quote": "1968年06月21日：1号線「大門」～「泉岳寺」開業、京浜急行線と相互直通運転を開始", "tier": "primary", "title": "交通局のあゆみ（地下鉄）— Tokyo Metropolitan Bureau of Transportation", "url": "https://www.kotsu.metro.tokyo.jp/about/ayumi/subway.html", "via": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A" } ], "stationCount": 2 }, { "confidence": "medium", "geometryRef": "tokyo-A", "id": "tokyo-a-19681115", "kind": "extension", "label": { "en": "Final extension: Sengakuji → Nishi-Magome (full line completed)" }, "opened": "1968-11-15", "segment": { "fromStopIndex": 0, "toStopIndex": 5 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260401001050/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A", "kind": "wikipedia", "quote": "1968年11月15日：泉岳寺駅-西馬込駅間(6.9 km)開業。全線開通", "tier": "tertiary", "title": "都営地下鉄浅草線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%b6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260513201644/https://en.wikipedia.org/wiki/Toei_Asakusa_Line", "kind": "wikipedia", "quote": "Sengakuji to Nishi-Magome ... 15 November 1968", "tier": "tertiary", "title": "Toei Asakusa Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_Asakusa_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260412085637/https://www.kotsu.metro.tokyo.jp/about/ayumi/subway.html", "kind": "primary", "publisher": "Tokyo Metropolitan Bureau of Transportation", "quote": "1968年11月15日：1号線「泉岳寺」～「西馬込」開業", "tier": "primary", "title": "交通局のあゆみ（地下鉄）— Tokyo Metropolitan Bureau of Transportation", "url": "https://www.kotsu.metro.tokyo.jp/about/ayumi/subway.html", "via": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A" } ], "stationCount": 5 }, { "confidence": "low", "geometryRef": null, "id": "tokyo-a-19780701", "kind": "renumber", "label": { "en": "Renamed: Line 1 → Toei Asakusa Line (line naming, no new track)" }, "notes": "Line renaming (Toei Line 1 → Asakusa Line) — no new track. [Opening-date chase 2026-06-13] Administrative renaming only (都営1号線 → 都営浅草線); no new track or stations opened on this date.", "opened": "1978-07-01", "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260401001050/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A", "kind": "wikipedia", "quote": "1978年7月1日：都営1号線から都営浅草線に改称", "tier": "tertiary", "title": "都営地下鉄浅草線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%b6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260513201644/https://en.wikipedia.org/wiki/Toei_Asakusa_Line", "kind": "wikipedia", "quote": "The line was named Asakusa Line on 1 July 1978", "tier": "tertiary", "title": "Toei Asakusa Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_Asakusa_Line" } ] } ], "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260401001050/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A", "kind": "wikipedia", "quote": "8月27日：地下鉄1号線最初の建設工事を開始 ... 都営1号線として押上駅-浅草橋駅間(3.2 km)開業", "tier": "tertiary", "title": "都営地下鉄浅草線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%B5%85%E8%8D%89%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260513201644/https://en.wikipedia.org/wiki/Toei_Asakusa_Line", "kind": "wikipedia", "quote": "the initial 3.2 km (2.0 mi) segment between Oshiage and Asakusabashi opened on 4 December 1960", "tier": "tertiary", "title": "Toei Asakusa Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_Asakusa_Line" } ] }, { "cityId": "tokyo", "color": "#0079C2", "displayNumber": "I", "id": "tokyo-line-i", "name": { "en": "Toei Mita Line" }, "phases": [ { "confidence": "low", "constructionStart": "1965", "geometryRef": "tokyo-I", "id": "tokyo-i-19681227", "kind": "initial", "label": { "en": "Stage 1 opens: Sugamo → Shimura (now Takashimadaira) (as Toei Line 6)" }, "notes": "[Date chase 2026-06-12] Japanese Wikipedia chronology gives a precise construction-start date of 11 December 1965 ('都営6号線建設工事開始'), confirming the curated 1965 year. The entry carries no inline citation in the wikitext.", "opened": "1968-12-27", "segment": { "fromStopIndex": 6, "toStopIndex": 12 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260504133820/https://en.wikipedia.org/wiki/Toei_Mita_Line", "kind": "wikipedia", "quote": "The first segment of the line opened on 27 December 1968, between Sugamo and Takashimadaira (10.4 km).", "tier": "tertiary", "title": "Toei Mita Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_Mita_Line" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260512085054/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E4%B8%89%E7%94%B0%E7%B7%9A", "kind": "wikipedia", "quote": "1968年（昭和43年）12月27日に都営6号線として巣鴨 - 志村（現・高島平）間 (10.4 km) が開業", "tier": "tertiary", "title": "都営地下鉄三田線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E4%B8%89%E7%94%B0%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260203001850/https://ja.wikipedia.org/wiki/%E8%A5%BF%E5%8F%B0%E9%A7%85", "kind": "wikipedia", "quote": "西台駅（Nishi-dai Station）opened on December 27, 1968 as part of the opening of the Bureau of Transportation's Line 6", "tier": "tertiary", "title": "西台駅 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E8%A5%BF%E5%8F%B0%E9%A7%85" } ], "stationCount": 11 }, { "confidence": "low", "geometryRef": "tokyo-I", "id": "tokyo-i-19720630", "kind": "extension", "label": { "en": "Extension opens: Hibiya → Sugamo" }, "opened": "1972-06-30", "segment": { "fromStopIndex": 12, "toStopIndex": 19 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260504133820/https://en.wikipedia.org/wiki/Toei_Mita_Line", "kind": "wikipedia", "quote": "The line was extended a further 7.3 km south to Hibiya on 30 June 1972.", "tier": "tertiary", "title": "Toei Mita Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_Mita_Line" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260512085054/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E4%B8%89%E7%94%B0%E7%B7%9A", "kind": "wikipedia", "quote": "1972年（昭和47年）6月30日：日比谷駅 - 巣鴨間 (7.3 km)", "tier": "tertiary", "title": "都営地下鉄三田線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E4%B8%89%E7%94%B0%E7%B7%9A" } ], "stationCount": 7 }, { "confidence": "low", "geometryRef": "tokyo-I", "id": "tokyo-i-19731127", "kind": "extension", "label": { "en": "Extension opens: Mita → Hibiya" }, "opened": "1973-11-27", "segment": { "fromStopIndex": 19, "toStopIndex": 23 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260504133820/https://en.wikipedia.org/wiki/Toei_Mita_Line", "kind": "wikipedia", "quote": "The line was extended 3.3 km further south to Mita on 27 November 1973.", "tier": "tertiary", "title": "Toei Mita Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_Mita_Line" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260512085054/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E4%B8%89%E7%94%B0%E7%B7%9A", "kind": "wikipedia", "quote": "1973年（昭和48年）11月27日：三田駅 - 日比谷間 (3.3 km)", "tier": "tertiary", "title": "都営地下鉄三田線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%b6%E5%9c%B0%E4%B8%8B%E9%89%84%E4%B8%89%E7%94%B0%E7%B7%9A" } ], "stationCount": 4 }, { "confidence": "low", "geometryRef": "tokyo-I", "id": "tokyo-i-19760506", "kind": "extension", "label": { "en": "Northern extension opens: Takashimadaira → Nishi-Takashimadaira" }, "notes": "[Opening-date chase 2026-06-13] Minor distance discrepancy across sources: EN Wikipedia 1.3 km vs JA Wikipedia 1.5 km; opening date is unaffected.", "opened": "1976-05-06", "segment": { "fromStopIndex": 2, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260504133820/https://en.wikipedia.org/wiki/Toei_Mita_Line", "kind": "wikipedia", "quote": "The northern 1.3 km extension was completed on 6 May 1976.", "tier": "tertiary", "title": "Toei Mita Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_Mita_Line" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20251126003510/https://ja.wikipedia.org/wiki/%E6%96%B0%E9%AB%98%E5%B3%B6%E5%B9%B3%E9%A7%85", "kind": "wikipedia", "quote": "新高島平駅 (Shin-Takashimadaira Station) opened on May 6, 1976 as an extension of Line 6", "tier": "tertiary", "title": "新高島平駅 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E6%96%B0%E9%AB%98%E5%B3%B6%E5%B9%B3%E9%A7%85" } ], "stationCount": 2 }, { "confidence": "low", "geometryRef": "tokyo-I", "id": "tokyo-i-19780701", "kind": "renumber", "label": { "en": "Renamed: Toei Line 6 → Toei Mita Line" }, "notes": "[Opening-date chase 2026-06-13] Phase is a rename event, not a revenue-service opening; date confirmed by primary Toei source.", "opened": "1978-07-01", "segment": { "fromStopIndex": 0, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260512085054/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E4%B8%89%E7%94%B0%E7%B7%9A", "kind": "wikipedia", "quote": "1978年7月1日：都営6号線を三田線に改称", "tier": "tertiary", "title": "都営地下鉄三田線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E4%B8%89%E7%94%B0%E7%B7%9A" } ] }, { "confidence": "medium", "constructionStart": "1992", "geometryRef": "tokyo-I", "id": "tokyo-i-20000926", "kind": "extension", "label": { "en": "Southern extension opens: Meguro → Mita (with through-service to Tokyu Meguro Line)" }, "notes": "[Date chase 2026-06-12] Construction start of 17 July 1992 for the Mita–Seishōkō-mae (now Shirokane-Takanawa) southern extension is given twice on Japanese Wikipedia (chronology + dedicated 建設経緯 section), both citing the Tokyo Metropolitan Bureau of Transportation 90th-anniversary history (東京都交通局90年史, offline primary). Confirms the curated 1992 year. [Opening-date chase 2026-06-13] Chase clarified a timeline trap: a timetable change and one-person operation began 2000-09-22, but the Mita–Meguro segment was explicitly non-revenue (非営業扱い) until the official public opening on 2000-09-26 — the curated date is the revenue date, not the earlier one.", "opened": "2000-09-26", "segment": { "fromStopIndex": 1, "toStopIndex": 23 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260504133820/https://en.wikipedia.org/wiki/Toei_Mita_Line", "kind": "wikipedia", "quote": "On 26 September 2000, the final 4 km segment from Mita to Meguro opened, and through service to the Meguro Line of Tokyu began at the same time.", "tier": "tertiary", "title": "Toei Mita Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_Mita_Line" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20251220000406/https://ja.wikipedia.org/wiki/%E7%99%BD%E9%87%91%E9%AB%98%E8%BC%AA%E9%A7%85", "kind": "wikipedia", "quote": "2000年9月26日に三田駅～目黒駅間（4.0 km）が開業し、全線が開業した。この同じ日に、東急目黒線と相互直通運転を開始した", "tier": "tertiary", "title": "白金高輪駅 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E7%99%BD%E9%87%91%E9%AB%98%E8%BC%AA%E9%A7%85" }, { "accessedAt": "2026-06-12", "archivedUrl": "https://web.archive.org/web/20260512085054/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E4%B8%89%E7%94%B0%E7%B7%9A", "kind": "other", "publisher": "Wikipedia (Japanese)", "quote": "* [[1992年]]（平成4年）[[7月17日]]：三田 - 清正公前間の建設工事に着手。 … 各種手続きを経た、[[1992年]]（平成4年）[[7月17日]]に延伸区間の建設工事に着手した。", "tier": "secondary", "title": "都営地下鉄三田線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E4%B8%89%E7%94%B0%E7%B7%9A", "via": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E4%B8%89%E7%94%B0%E7%B7%9A" } ], "stationCount": 3 } ], "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260504133820/https://en.wikipedia.org/wiki/Toei_Mita_Line", "kind": "wikipedia", "quote": "The first segment of the line opened on 27 December 1968, between Sugamo and Takashimadaira (10.4 km).", "tier": "tertiary", "title": "Toei Mita Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_Mita_Line" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260512085054/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E4%B8%89%E7%94%B0%E7%B7%9A", "kind": "wikipedia", "quote": "1968年（昭和43年）12月27日に都営6号線として巣鴨 - 志村（現・高島平）間 (10.4 km) が開業", "tier": "tertiary", "title": "都営地下鉄三田線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E4%B8%89%E7%94%B0%E7%B7%9A" } ] }, { "cityId": "tokyo", "color": "#6CBB5A", "displayNumber": "S", "id": "tokyo-line-s", "name": { "en": "Toei Shinjuku Line" }, "phases": [ { "confidence": "low", "constructionStart": "1971", "geometryRef": "tokyo-S", "id": "tokyo-s-19781221", "kind": "initial", "label": { "en": "Stage 1 opens: Iwamotochō → Higashi-ōjima (initial section)" }, "notes": "[Date chase 2026-06-12] Construction-start corroborated as specifically 1 May 1971 (森下・住吉 area) by both JA and EN Wikipedia. Caveat: only Wikipedia sources available; JA entry has no inline ref and the EN passage sits in an {{Unreferenced section}}; no non-Wikipedia primary/news source was accessible online for the construction-start fact. [Opening-date chase 2026-06-13] Revenue-service opening corroborated by contemporaneous 交通新聞 (Kotsu Shimbun) report dated 1978-12-20 cited in JA Wikipedia wikitext.", "opened": "1978-12-21", "segment": { "fromStopIndex": 5, "toStopIndex": 13 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260610140525/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%96%B0%E5%AE%BF%E7%B7%9A", "kind": "wikipedia", "quote": "岩本町 - 東大島間 (6.8 km) 開業", "tier": "tertiary", "title": "都営地下鉄新宿線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%96%B0%E5%AE%BF%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260513201659/https://en.wikipedia.org/wiki/Toei_Shinjuku_Line", "kind": "wikipedia", "quote": "December 21, 1978: Iwamotochō–Higashi-ōjima section opened (7 stations added)", "tier": "tertiary", "title": "Toei Shinjuku Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_Shinjuku_Line" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260610140525/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%96%B0%E5%AE%BF%E7%B7%9A", "kind": "wikipedia", "quote": "森下・住吉付近で最初の建設工事に着手", "tier": "tertiary", "title": "都営地下鉄新宿線 — Wikipedia (JA), construction start", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%96%B0%E5%AE%BF%E7%B7%9A" } ], "stationCount": 7 }, { "confidence": "low", "geometryRef": "tokyo-S", "id": "tokyo-s-19800316", "kind": "extension", "label": { "en": "Stage 2 opens: Shinjuku → Iwamotochō (Keiō through-service begins)" }, "opened": "1980-03-16", "segment": { "fromStopIndex": 13, "toStopIndex": 19 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260610140525/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%96%B0%E5%AE%BF%E7%B7%9A", "kind": "wikipedia", "quote": "新宿 - 岩本町間 (7.3 km) 開業", "tier": "tertiary", "title": "都営地下鉄新宿線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%96%B0%E5%AE%BF%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260610140525/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%96%B0%E5%AE%BF%E7%B7%9A", "kind": "wikipedia", "quote": "京王帝都電鉄（現：京王電鉄）と、1978年10月31日に供用を開始していた京王新線を経由し相互直通運転開始", "tier": "tertiary", "title": "都営地下鉄新宿線 — Wikipedia (JA), through service", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%96%B0%E5%AE%BF%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260513201659/https://en.wikipedia.org/wiki/Toei_Shinjuku_Line", "kind": "wikipedia", "quote": "March 16, 1980: Shinjuku–Iwamotochō section opened; through service to Keiō lines began (3 stations added)", "tier": "tertiary", "title": "Toei Shinjuku Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_Shinjuku_Line" } ], "stationCount": 3 }, { "confidence": "low", "geometryRef": "tokyo-S", "id": "tokyo-s-19831223", "kind": "extension", "label": { "en": "Stage 3 opens: Higashi-ōjima → Funabori" }, "opened": "1983-12-23", "segment": { "fromStopIndex": 4, "toStopIndex": 5 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260610140525/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%96%B0%E5%AE%BF%E7%B7%9A", "kind": "wikipedia", "quote": "東大島 - 船堀間 (1.7 km) 開業", "tier": "tertiary", "title": "都営地下鉄新宿線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%96%B0%E5%AE%BF%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260513201659/https://en.wikipedia.org/wiki/Toei_Shinjuku_Line", "kind": "wikipedia", "quote": "December 23, 1983: Higashi-ōjima–Funabori section opened (2 stations added)", "tier": "tertiary", "title": "Toei Shinjuku Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_Shinjuku_Line" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": "tokyo-S", "id": "tokyo-s-19860914", "kind": "extension", "label": { "en": "Stage 4 opens: Funabori → Shinozaki" }, "opened": "1986-09-14", "segment": { "fromStopIndex": 1, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260610140525/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%96%B0%E5%AE%BF%E7%B7%9A", "kind": "wikipedia", "quote": "船堀 - 篠崎間 (4.9 km) 開業", "tier": "tertiary", "title": "都営地下鉄新宿線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%96%B0%E5%AE%BF%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260513201659/https://en.wikipedia.org/wiki/Toei_Shinjuku_Line", "kind": "wikipedia", "quote": "September 14, 1986: Funabori–Shinozaki section opened (2 stations added)", "tier": "tertiary", "title": "Toei Shinjuku Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_Shinjuku_Line" } ], "stationCount": 3 }, { "confidence": "low", "geometryRef": "tokyo-S", "id": "tokyo-s-19890319", "kind": "extension", "label": { "en": "Stage 5 opens: Shinozaki → Motoyawata (line fully through, temporary terminus)" }, "notes": "[Opening-date chase 2026-06-13] This opening completed the line through to Motoyawata, but Motoyawata opened as a TEMPORARY station only; the permanent station is the subsequent 1991-09-01 phase.", "opened": "1989-03-19", "segment": { "fromStopIndex": 0, "toStopIndex": 1 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260610140525/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%96%B0%E5%AE%BF%E7%B7%9A", "kind": "wikipedia", "quote": "篠崎 - 本八幡間 (2.8 km) 開業（全線開通）", "tier": "tertiary", "title": "都営地下鉄新宿線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%96%B0%E5%AE%BF%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260513201659/https://en.wikipedia.org/wiki/Toei_Shinjuku_Line", "kind": "wikipedia", "quote": "March 19, 1989: Shinozaki–Motoyawata section opened (1 station added)", "tier": "tertiary", "title": "Toei Shinjuku Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_Shinjuku_Line" } ], "stationCount": 1 }, { "confidence": "low", "geometryRef": null, "id": "tokyo-s-19910901", "kind": "reopening", "label": { "en": "Motoyawata permanent (underground) terminus station opens, replacing temporary terminus" }, "notes": "Permanent Motoyawata terminus replacing the 1989 temporary one — already drawn; not a new opening. [Opening-date chase 2026-06-13] Motoyawata permanent underground station opened 1991-09-01, replacing the 1989 temporary terminus; Keiō through-service was extended to Motoyawata at the same time. Distinct revenue-service milestone, correctly modeled as a separate phase.", "opened": "1991-09-01", "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260610140525/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%96%B0%E5%AE%BF%E7%B7%9A", "kind": "wikipedia", "quote": "本八幡駅（本設駅）開業", "tier": "tertiary", "title": "都営地下鉄新宿線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%96%B0%E5%AE%BF%E7%B7%9A" } ] } ], "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260610140525/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%96%B0%E5%AE%BF%E7%B7%9A", "kind": "wikipedia", "quote": "岩本町 - 東大島間 (6.8 km) 開業", "tier": "tertiary", "title": "都営地下鉄新宿線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E6%96%B0%E5%AE%BF%E7%B7%9A" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260513201659/https://en.wikipedia.org/wiki/Toei_Shinjuku_Line", "kind": "wikipedia", "quote": "December 21, 1978: Iwamotochō–Higashi-ōjima section opened (7 stations added)", "tier": "tertiary", "title": "Toei Shinjuku Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_Shinjuku_Line" } ] }, { "cityId": "tokyo", "color": "#B6007A", "displayNumber": "E", "id": "tokyo-line-e", "name": { "en": "Toei Oedo Line" }, "phases": [ { "confidence": "medium", "constructionStart": "1986", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "JPY", "isEstimate": false, "value": 399100000000, "year": 2000 }, "notes": "Figure is the final construction cost of the ENTIRE radial section (放射部, Hikarigaoka–Tochomae, opened in stages 1991–1997), NOT this 1991 segment alone: ¥399.1 billion. The loop section (環状部) cost a further ¥958.3 billion, for a whole-line total of ¥1,357.4 billion (¥1.3574 trillion). These are nominal final-outturn yen accumulated over the build (price-level ~2000, not inflation-adjusted to a single base year, which JA Wikipedia does not state). Whole line was originally budgeted at ~¥682.6 billion. [Citation chase 2026-06-11] The ¥399.1B radial-section figure traces solely to an offline 2015 book (大江戸線建設物語, Seizando-Shoten, pp. 20-21) and could not be independently verified online; the only retrievable official primary source (Tokyo Metropolitan Bureau of Transportation post-project evaluation PDF) confirms only the loop section at ¥988.6 billion in FY1999 prices.", "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260509092531/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E5%A4%A7%E6%B1%9F%E6%88%B8%E7%B7%9A", "kind": "wikipedia", "quote": "1991年（平成3年）12月10日：都営12号線として光が丘駅 - 練馬駅間が開業。建設開始は1986年6月1日。", "tier": "tertiary", "title": "都営地下鉄大江戸線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/都営地下鉄大江戸線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260509092531/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E5%A4%A7%E6%B1%9F%E6%88%B8%E7%B7%9A", "kind": "wikipedia", "quote": "放射部で3,991億円、環状部で9,583億円、全線では1儓6,574億円（記2了4キロあたり放射部286億円、環状部323億円）", "tier": "tertiary", "title": "都営地下鉄大江戸線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/都営地下鉄大江戸線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260410233702/https://en.wikipedia.org/wiki/Toei_%C5%8Cedo_Line", "kind": "wikipedia", "quote": "the first segment from Hikarigaoka to Nerima began operations on 10 December 1991 ... Construction began on June 1, 1986", "tier": "tertiary", "title": "Toei Ōedo Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_%C5%8Cedo_Line" }, { "accessedAt": "2026-06-11", "archivedUrl": "https://web.archive.org/web/20211019132858/https://web.archive.org/web/20060517042836/http://www.kotsu.metro.tokyo.jp/news/pdf/sub_t_20060324a_01.pdf", "kind": "primary", "publisher": "Tokyo Metropolitan Bureau of Transportation (東京都交通局)", "quote": "総事業費 9,886 億円 … 想定値(免許申請時) 6,826 億円（昭和 62 年度単価）… 実績値 9,886 億円（平成 11 年度単価）", "tier": "primary", "title": "都営12号線（大江戸線）環状部事業の評価（総括表） [Post-project evaluation summary: Toei Line 12 (Oedo Line) loop-section project]", "url": "https://web.archive.org/web/20060517042836/http://www.kotsu.metro.tokyo.jp/news/pdf/sub_t_20060324a_01.pdf", "via": "https://en.wikipedia.org/wiki/Toei_%C5%8Cedo_Line" } ] }, "geometryRef": "tokyo-E", "id": "tokyo-e-19911210", "kind": "initial", "label": { "en": "Stage 1 opens: Hikarigaoka → Nerima (radial branch, as Toei Line 12)" }, "notes": "[Date chase 2026-06-12] Construction start 1986-06-01 (Hikarigaoka-Nerima) confirmed by JA Wikipedia citing primary operator history 大江戸線放射部建設史 p.5; corroborated by EN Wikipedia. Year 1986 supported.", "opened": "1991-12-10", "segment": { "fromStopIndex": 0, "toStopIndex": 2 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260509092531/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E5%A4%A7%E6%B1%9F%E6%88%B8%E7%B7%9A", "kind": "wikipedia", "quote": "1991年（平成3年）12月10日：都営12号線として光が丘駅 - 練馬駅間が開業。建設開始は1986年6月1日。", "tier": "tertiary", "title": "都営地下鉄大江戸線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/都営地下鉄大江戸線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260509092531/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E5%A4%A7%E6%B1%9F%E6%88%B8%E7%B7%9A", "kind": "wikipedia", "quote": "放射部で3,991億円、環状部で9,583億円、全線では1儓6,574億円（記2了4キロあたり放射部286億円、環状部323億円）", "tier": "tertiary", "title": "都営地下鉄大江戸線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/都営地下鉄大江戸線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260410233702/https://en.wikipedia.org/wiki/Toei_%C5%8Cedo_Line", "kind": "wikipedia", "quote": "the first segment from Hikarigaoka to Nerima began operations on 10 December 1991 ... Construction began on June 1, 1986", "tier": "tertiary", "title": "Toei Ōedo Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_%C5%8Cedo_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260412085637/https://www.kotsu.metro.tokyo.jp/about/ayumi/subway.html", "kind": "primary", "publisher": "Tokyo Metropolitan Bureau of Transportation (Toei)", "quote": "1991年12月10日 — 12号線（現・大江戸線）「練馬」～「光が丘」開業", "tier": "primary", "title": "交通局のあゆみ 都営地下鉄 — Tokyo Metropolitan Bureau of Transportation", "url": "https://www.kotsu.metro.tokyo.jp/about/ayumi/subway.html", "via": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E5%A4%A7%E6%B1%9F%E6%88%B8%E7%B7%9A" } ], "stationCount": 4 }, { "confidence": "medium", "constructionStart": "1990", "geometryRef": "tokyo-E", "id": "tokyo-e-19971219", "kind": "extension", "label": { "en": "Stage 2 opens: Nerima → Shinjuku (radial branch extension)" }, "notes": "[Date chase 2026-06-12] Construction start 1990-08-01 (Nerima-Shinjuku) confirmed by JA Wikipedia citing 大江戸線放射部建設史 p.5. EN Wikipedia records only the opening, not the construction start. Year 1990 supported.", "opened": "1997-12-19", "segment": { "fromStopIndex": 2, "toStopIndex": 10 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260509092531/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E5%A4%A7%E6%B1%9F%E6%88%B8%E7%B7%9A", "kind": "wikipedia", "quote": "1997年（平成9年）12月19日：練馬駅 - 新宿駅間が開業。建設開始は1990年8月1日。", "tier": "tertiary", "title": "都営地下鉄大江戸線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/都営地下鉄大江戸線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260410233702/https://en.wikipedia.org/wiki/Toei_%C5%8Cedo_Line", "kind": "wikipedia", "quote": "The line was extended from Nerima to Shinjuku on 19 December 1997", "tier": "tertiary", "title": "Toei Ōedo Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_%C5%8Cedo_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260412085637/https://www.kotsu.metro.tokyo.jp/about/ayumi/subway.html", "kind": "primary", "publisher": "Tokyo Metropolitan Bureau of Transportation (Toei)", "quote": "1997年12月19日 — 12号線「新宿」～「練馬」開業", "tier": "primary", "title": "交通局のあゆみ 都営地下鉄 — Tokyo Metropolitan Bureau of Transportation", "url": "https://www.kotsu.metro.tokyo.jp/about/ayumi/subway.html", "via": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E5%A4%A7%E6%B1%9F%E6%88%B8%E7%B7%9A" } ], "stationCount": 8 }, { "confidence": "medium", "constructionStart": "1992", "geometryRef": "tokyo-E", "id": "tokyo-e-20000420", "kind": "extension", "label": { "en": "Stage 3 opens: Shinjuku → Kokuritsu-Kyōgijō (loop section, advance opening)" }, "notes": "[Date chase 2026-06-12] Loop section (環状部) construction start 1992-02-01 confirmed by JA Wikipedia citing 大江戸線放射部建設史 p.5. This advance loop opening shares the same construction start as the full-loop phase. Year 1992 supported. [Opening-date chase 2026-06-13] Sources show the line was renamed from Toei Line 12 to Toei Oedo Line on this same date (2000-04-20, Stage 3), not at the 2000-12-12 full-line opening as the Stage 4 label implies.", "opened": "2000-04-20", "segment": { "fromStopIndex": 10, "toStopIndex": 12 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260509092531/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E5%A4%A7%E6%B1%9F%E6%88%B8%E7%B7%9A", "kind": "wikipedia", "quote": "2000年（平成12年）4月20日：新宿駅 - 国立競技場駅間が開業。環状部の建設開始は1992年2月1日。", "tier": "tertiary", "title": "都営地下鉄大江戸線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/都営地下鉄大江戸線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20251112165840/https://ja.wikipedia.org/wiki/%E5%9B%BD%E7%AB%8B%E7%AB%B6%E6%8A%80%E5%A0%B4%E9%A7%85", "kind": "wikipedia", "quote": "2000年4月20日：大江戸線の新宿駅 - 当駅間の延伸により開業。（代々木駅E-26・国立競技場駅E-25）", "tier": "tertiary", "title": "国立競技場駅 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/国立競技場駅" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260412085637/https://www.kotsu.metro.tokyo.jp/about/ayumi/subway.html", "kind": "primary", "publisher": "Tokyo Metropolitan Bureau of Transportation (Toei)", "quote": "2000年4月20日 — 「12号線」を「大江戸線」に名称変更、大江戸線「新宿」～「国立競技場」開業", "tier": "primary", "title": "交通局のあゆみ 都営地下鉄 — Tokyo Metropolitan Bureau of Transportation", "url": "https://www.kotsu.metro.tokyo.jp/about/ayumi/subway.html", "via": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E5%A4%A7%E6%B1%9F%E6%88%B8%E7%B7%9A" } ], "stationCount": 2 }, { "confidence": "medium", "constructionStart": "1992", "cost": { "basis": "outturn", "confidence": "medium", "nominal": { "currency": "JPY", "isEstimate": false, "value": 958300000000, "year": 2000 }, "notes": "Figure is the final construction cost of the ENTIRE loop section (環状部): ¥958.3 billion; whole-line total (radial + loop) = ¥1,357.4 billion (¥1.3574 trillion), making it the most expensive Tokyo subway line per km (~¥32.3 billion/km on the loop). Nominal final-outturn yen accumulated over the 1992–2000 build; JA Wikipedia does not state a single deflated base year. The 24 new stations are E-24 down to E-01 plus Tochomae linkage; Shiodome existed only as a signal point (信号所) at this opening and is counted in the 2002 phase, not here. [Citation chase 2026-06-11] The loop-section construction cost ¥9,583億円 is confirmed by JA Wikipedia citing the 2015 official monograph 「大江戸線建設物語」 (pp. 20–21, supervised by Tokyo Metropolitan Bureau of Transportation); note that a separate 2006 Toei post-project evaluation gives an \"official\" loop cost of ¥988.6 billion, a ~3% higher figure likely reflecting a broader (total-project) accounting scope.", "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260509092531/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E5%A4%A7%E6%B1%9F%E6%88%B8%E7%B7%9A", "kind": "wikipedia", "quote": "全線開業日が平成12年12月12日で、本路線が12号線であることに因む", "tier": "tertiary", "title": "都営地下鉄大江戸線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/都営地下鉄大江戸線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260410233702/https://en.wikipedia.org/wiki/Toei_%C5%8Cedo_Line", "kind": "wikipedia", "quote": "The full line began operation on 12 December 2000. ... renamed ... by Governor Shintaro Ishihara", "tier": "tertiary", "title": "Toei Ōedo Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_%C5%8Cedo_Line" } ] }, "geometryRef": "tokyo-E", "id": "tokyo-e-20001212", "kind": "extension", "label": { "en": "Stage 4: Full line opens — Kokuritsu-Kyōgijō → Tochomae loop completed; line renamed from Toei Line 12 to Toei Ōedo Line" }, "notes": "[Date chase 2026-06-12] Full-loop completion; loop section (環状部) construction start 1992-02-01 confirmed by JA Wikipedia citing 大江戸線放射部建設史 p.5 (same start as the 2000-04-20 advance opening). Year 1992 supported. [Opening-date chase 2026-06-13] Date deliberately chosen as 12/12 to match Line 12. Shiodome was not opened on this date; it operated as a signal point with all trains passing through until 2002-11-02.", "opened": "2000-12-12", "segment": { "fromStopIndex": 9, "toStopIndex": 36 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260509092531/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E5%A4%A7%E6%B1%9F%E6%88%B8%E7%B7%9A", "kind": "wikipedia", "quote": "全線開業日が平成12年12月12日で、本路線が12号線であることに因む", "tier": "tertiary", "title": "都営地下鉄大江戸線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/都営地下鉄大江戸線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260410233702/https://en.wikipedia.org/wiki/Toei_%C5%8Cedo_Line", "kind": "wikipedia", "quote": "The full line began operation on 12 December 2000. ... renamed ... by Governor Shintaro Ishihara", "tier": "tertiary", "title": "Toei Ōedo Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_%C5%8Cedo_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260412085637/https://www.kotsu.metro.tokyo.jp/about/ayumi/subway.html", "kind": "primary", "publisher": "Tokyo Metropolitan Bureau of Transportation (Toei)", "quote": "2000年12月12日 — 大江戸線「国立競技場」～「大門」～「都庁前」開業", "tier": "primary", "title": "交通局のあゆみ 都営地下鉄 — Tokyo Metropolitan Bureau of Transportation", "url": "https://www.kotsu.metro.tokyo.jp/about/ayumi/subway.html", "via": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E5%A4%A7%E6%B1%9F%E6%88%B8%E7%B7%9A" } ], "stationCount": 24 }, { "confidence": "medium", "geometryRef": "tokyo-E", "id": "tokyo-e-20021102", "kind": "extension", "label": { "en": "Shiodome Station opens (infill station on already-open loop section; former signal point converted to station)" }, "notes": "[Opening-date chase 2026-06-13] Shiodome had operated as a through signal point ('汐留信号所〈2代〉') since the 2000-12-12 full-line opening; converted to a full revenue station on 2002-11-02 to connect with the Yurikamome line.", "opened": "2002-11-02", "segment": { "fromStopIndex": 12, "toStopIndex": 18 }, "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260509092531/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E5%A4%A7%E6%B1%9F%E6%88%B8%E7%B7%9A", "kind": "wikipedia", "quote": "汐留信号所（2代）を駅に変更して汐留駅開業 ... 2002年11月2日", "tier": "tertiary", "title": "都営地下鉄大江戸線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/都営地下鉄大江戸線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260410233702/https://en.wikipedia.org/wiki/Toei_%C5%8Cedo_Line", "kind": "wikipedia", "quote": "An additional station (Shiodome Station) was opened on 2 November 2002 to connect to the Yurikamome guideway transit line.", "tier": "tertiary", "title": "Toei Ōedo Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_%C5%8Cedo_Line" }, { "accessedAt": "2026-06-13", "archivedUrl": "https://web.archive.org/web/20260412085637/https://www.kotsu.metro.tokyo.jp/about/ayumi/subway.html", "kind": "primary", "publisher": "Tokyo Metropolitan Bureau of Transportation (Toei)", "quote": "2002年11月02日 — 大江戸線汐留駅開業", "tier": "primary", "title": "交通局のあゆみ 都営地下鉄 — Tokyo Metropolitan Bureau of Transportation", "url": "https://www.kotsu.metro.tokyo.jp/about/ayumi/subway.html", "via": "https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E5%A4%A7%E6%B1%9F%E6%88%B8%E7%B7%9A" } ], "stationCount": 1 } ], "sources": [ { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260509092531/https://ja.wikipedia.org/wiki/%E9%83%BD%E5%96%B6%E5%9C%B0%E4%B8%8B%E9%89%84%E5%A4%A7%E6%B1%9F%E6%88%B8%E7%B7%9A", "kind": "wikipedia", "quote": "1991年（平成3年）12月10日：都営12号線として光が丘駅 - 練馬駅間が開業。建設開始は1986年6月1日。", "tier": "tertiary", "title": "都営地下鉄大江戸線 — Wikipedia (JA)", "url": "https://ja.wikipedia.org/wiki/都営地下鉄大江戸線" }, { "accessedAt": "2026-06-08", "archivedUrl": "https://web.archive.org/web/20260410233702/https://en.wikipedia.org/wiki/Toei_%C5%8Cedo_Line", "kind": "wikipedia", "quote": "the first segment from Hikarigaoka to Nerima began operations on 10 December 1991 ... Construction began on June 1, 1986", "tier": "tertiary", "title": "Toei Ōedo Line — Wikipedia", "url": "https://en.wikipedia.org/wiki/Toei_%C5%8Cedo_Line" } ] } ], "name": { "en": "Tokyo", "ja": "東京" } }, { "bbox": [ 20.87, 52.11, 21.1, 52.31 ], "center": [ 21, 52.23 ], "country": "Poland", "defaultZoom": 11, "homeCurrency": "PLN", "id": "warsaw", "lines": [ { "cityId": "warsaw", "color": "#0057B8", "displayNumber": "M1", "id": "warsaw-line-M1", "name": { "en": "Line M1 (Kabaty ↔ Młociny)", "pl": "I linia metra" }, "phases": [ { "confidence": "high", "constructionStart": "1983", "geometryRef": "warsaw-M1", "id": "warsaw-m1-1995-kabaty-politechnika", "kind": "initial", "label": { "en": "Stage I: Kabaty → Politechnika (initial section)" }, "notes": "First 11.5 km / 11 stations (Kabaty, Natolin, Imielin, Stokłosy, Ursynów, Służew, Wilanowska, Wierzbno, Racławicka, Pole Mokotowskie, Politechnika). Public passenger service began 7 Apr 1995. Physical construction dated to 15 Apr 1983 (first steel sheet-pile driven at Ursynów) — the true physical-works start, not a contract/ceremony.", "opened": "1995-04-07", "segment": { "fromStopIndex": 10, "toStopIndex": 20 }, "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (PL)", "quote": "7 kwietnia 1995 o godz. 12.00 na stacji Wilanowska miało miejsce uroczyste uruchomienie pierwszego odcinka", "tier": "tertiary", "title": "Linia M1 metra w Warszawie — Wikipedia (PL)", "url": "https://pl.wikipedia.org/wiki/Linia_M1_metra_w_Warszawie" }, { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (PL)", "quote": "za początek inwestycji uznaje się 15 kwietnia 1983, kiedy to nastąpiło wbicie na Ursynowie pierwszego stalowego pala ścianki berlińskiej.", "tier": "tertiary", "title": "Linia M1 metra w Warszawie — Wikipedia (PL) (physical construction start)", "url": "https://pl.wikipedia.org/wiki/Linia_M1_metra_w_Warszawie" }, { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "the first section of line M1 — eleven stations between Kabaty and Politechnika — opened on 7 April 1995.", "tier": "tertiary", "title": "Warsaw Metro — Wikipedia (EN)", "url": "https://en.wikipedia.org/wiki/Warsaw_Metro" } ], "stationCount": 11 }, { "confidence": "high", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "PLN", "isEstimate": false, "value": 215000000, "year": 1998 }, "notes": "Construction cost of the Centrum extension: station 120M zł + connecting tunnels 95M zł = 215M zł. Figures in post-1995-redenomination (new) złoty.", "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (PL)", "quote": "Koszt budowy stacji wyniósł 120 mln złotych, natomiast tuneli 95 mln złotych.", "tier": "tertiary", "title": "Linia M1 metra w Warszawie — Wikipedia (PL)", "url": "https://pl.wikipedia.org/wiki/Linia_M1_metra_w_Warszawie" } ] }, "geometryRef": "warsaw-M1", "id": "warsaw-m1-1998-centrum", "kind": "extension", "label": { "en": "Stage II: Politechnika → Centrum" }, "notes": "Added station Centrum (A12).", "opened": "1998-05-26", "segment": { "fromStopIndex": 9, "toStopIndex": 10 }, "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (PL)", "quote": "26 maja 1998 uruchomiono stację Centrum", "tier": "tertiary", "title": "Linia M1 metra w Warszawie — Wikipedia (PL)", "url": "https://pl.wikipedia.org/wiki/Linia_M1_metra_w_Warszawie" } ], "stationCount": 1 }, { "confidence": "high", "cost": { "basis": "estimate", "confidence": "high", "nominal": { "currency": "PLN", "isEstimate": true, "value": 400000000, "year": 2001 }, "notes": "PL Wikipedia gives 'około 400 mln złotych' (approximately 400M zł) for the two-station Centrum→Ratusz investment — an approximate total, so recorded as an estimate. This cost was contested during verification and settled by the Opus tiebreaker (still confirmed).", "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (PL)", "quote": "Łączny koszt inwestycji wyniósł około 400 mln złotych.", "tier": "tertiary", "title": "Linia M1 metra w Warszawie — Wikipedia (PL)", "url": "https://pl.wikipedia.org/wiki/Linia_M1_metra_w_Warszawie" } ] }, "geometryRef": "warsaw-M1", "id": "warsaw-m1-2001-swietokrzyska-ratusz", "kind": "extension", "label": { "en": "Stage III: Centrum → Ratusz (Świętokrzyska, Ratusz)" }, "notes": "Added Świętokrzyska (A13) and Ratusz (A14, later renamed Ratusz Arsenał).", "opened": "2001-05-11", "segment": { "fromStopIndex": 7, "toStopIndex": 9 }, "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (PL)", "quote": "11 maja 2001 oddano do użytku stacje Świętokrzyska i Ratusz", "tier": "tertiary", "title": "Linia M1 metra w Warszawie — Wikipedia (PL)", "url": "https://pl.wikipedia.org/wiki/Linia_M1_metra_w_Warszawie" } ], "stationCount": 2 }, { "confidence": "high", "geometryRef": "warsaw-M1", "id": "warsaw-m1-2003-dworzec-gdanski", "kind": "extension", "label": { "en": "Stage IV: Ratusz → Dworzec Gdański" }, "notes": "Added station Dworzec Gdański (A15), entered service 20 Dec 2003.", "opened": "2003-12-20", "segment": { "fromStopIndex": 6, "toStopIndex": 7 }, "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (PL)", "quote": "20 grudnia 2003 miało miejsce uroczyste otwarcie tej stacji", "tier": "tertiary", "title": "Linia M1 metra w Warszawie — Wikipedia (PL)", "url": "https://pl.wikipedia.org/wiki/Linia_M1_metra_w_Warszawie" } ], "stationCount": 1 }, { "confidence": "high", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "PLN", "isEstimate": true, "value": 92000000, "year": 2005 }, "notes": "Recorded as an estimate/upper-bound because the sourced 92M zł figure BUNDLES the metro station, turnback/siding tracks AND the rebuilt ul. Słowackiego including tram tracks — it is not a pure-metro cost, so it overstates metro-attributable spend. Kept for coverage with this caveat; no separate metro-only figure was found.", "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (PL)", "quote": "Koszt budowy stacji i torów odstawczych oraz nowej ul. Słowackiego wraz z torami tramwajowymi wyniósł 92 mln złotych", "tier": "tertiary", "title": "Linia M1 metra w Warszawie — Wikipedia (PL)", "url": "https://pl.wikipedia.org/wiki/Linia_M1_metra_w_Warszawie" } ] }, "geometryRef": "warsaw-M1", "id": "warsaw-m1-2005-plac-wilsona", "kind": "extension", "label": { "en": "Stage V: Dworzec Gdański → Plac Wilsona" }, "notes": "Added station Plac Wilsona (A16); brought into passenger service 8 Apr 2005.", "opened": "2005-04-08", "segment": { "fromStopIndex": 5, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (PL)", "quote": "8 kwietnia 2005 o godzinie 5.08 stacja Plac Wilsona została włączona do ruchu pasażerskiego", "tier": "tertiary", "title": "Linia M1 metra w Warszawie — Wikipedia (PL)", "url": "https://pl.wikipedia.org/wiki/Linia_M1_metra_w_Warszawie" } ], "stationCount": 1 }, { "confidence": "high", "geometryRef": "warsaw-M1", "id": "warsaw-m1-2006-marymont", "kind": "extension", "label": { "en": "Stage VI: Plac Wilsona → Marymont" }, "notes": "Added station Marymont (A17; the PL Wikipedia station-code text reads 'A19 Marymont', a minor source inconsistency).", "opened": "2006-12-29", "segment": { "fromStopIndex": 4, "toStopIndex": 5 }, "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (PL)", "quote": "29 grudnia 2006 uruchomiono stację A19 Marymont", "tier": "tertiary", "title": "Linia M1 metra w Warszawie — Wikipedia (PL)", "url": "https://pl.wikipedia.org/wiki/Linia_M1_metra_w_Warszawie" } ], "stationCount": 1 }, { "confidence": "high", "geometryRef": "warsaw-M1", "id": "warsaw-m1-2008-slodowiec", "kind": "extension", "label": { "en": "Stage VII: Marymont → Słodowiec" }, "notes": "Added station Słodowiec (A18); first passenger train 23 Apr 2008. Originally planned to open with Marymont but delayed over a year — a distinct staged opening from the final Bielany section (25 Oct 2008).", "opened": "2008-04-23", "segment": { "fromStopIndex": 3, "toStopIndex": 4 }, "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (PL)", "quote": "23 kwietnia 2008 otwarto stację Słodowiec i o godz. 10.25 wjechał na nią pierwszy pociąg z pasażerami.", "tier": "tertiary", "title": "Linia M1 metra w Warszawie — Wikipedia (PL)", "url": "https://pl.wikipedia.org/wiki/Linia_M1_metra_w_Warszawie" } ], "stationCount": 1 }, { "confidence": "high", "geometryRef": "warsaw-M1", "id": "warsaw-m1-2008-mlociny", "kind": "extension", "label": { "en": "Stage VIII: Słodowiec → Młociny (Stare Bielany, Wawrzyszew, Młociny) — line complete" }, "notes": "Final three stations Stare Bielany, Wawrzyszew and Młociny opened, completing the 21-station M1 line after 25 years of construction.", "opened": "2008-10-25", "segment": { "fromStopIndex": 0, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (PL)", "quote": "25 października 2008, po 25 latach budowy, zakończono prace nad I linią metra w Warszawie i uruchomiono jej trzy ostatnie stacje – Stare Bielany, Wawrzyszew i Młociny", "tier": "tertiary", "title": "Linia M1 metra w Warszawie — Wikipedia (PL)", "url": "https://pl.wikipedia.org/wiki/Linia_M1_metra_w_Warszawie" } ], "stationCount": 3 } ], "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (PL)", "tier": "tertiary", "title": "Linia M1 metra w Warszawie — Wikipedia (PL)", "url": "https://pl.wikipedia.org/wiki/Linia_M1_metra_w_Warszawie" }, { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "tier": "tertiary", "title": "Warsaw Metro — Wikipedia (EN)", "url": "https://en.wikipedia.org/wiki/Warsaw_Metro" } ] }, { "cityId": "warsaw", "color": "#C8102E", "displayNumber": "M2", "id": "warsaw-line-M2", "name": { "en": "Line M2 (east–west)", "pl": "II linia metra" }, "phases": [ { "confidence": "high", "constructionStart": "2010", "cost": { "basis": "outturn", "confidence": "high", "nominal": { "currency": "PLN", "isEstimate": false, "value": 4170000000, "year": 2015 }, "notes": "Final construction outturn of the central section: 4.17 bln zł, of which 2.77 bln zł was co-financed by the EU Cohesion Fund (Infrastructure & Environment programme). Total project cost including rolling stock was 5.98 bln zł (rolling stock excluded here to keep infrastructure-only comparability).", "sources": [ { "accessedAt": "2026-07-14", "kind": "other", "publisher": "Otwarta Warszawa", "quote": "Koszt inwestycji wyniósł 4,17 mld zł, z czego 2,77 mld zł finansowane było przez Unię Europejską w ramach Funduszu Spójności – Programu Infrastruktura i Środowisko. Całkowity koszt projektu z zakupem taboru wyniósł 5,98 mld zł", "tier": "secondary", "title": "Linia M2 metra w Warszawie — Otwarta Warszawa", "url": "https://otwartawarszawa.pl/przewodnik/linia-m2-metra-w-warszawie" } ] }, "geometryRef": "warsaw-M2", "id": "warsaw-m2-2015-central", "kind": "initial", "label": { "en": "Central section: Rondo Daszyńskiego → Dworzec Wileński (initial M2 line)" }, "notes": "Central section ~6.1 km, 7 stations (Rondo Daszyńskiego, Rondo ONZ, Świętokrzyska [M1 interchange], Nowy Świat-Uniwersytet, Centrum Nauki Kopernik, Stadion Narodowy, Dworzec Wileński). Physical preparatory works began 16 Aug 2010. Date note: some English/aggregator sources cite 4 Mar 2015, but that was a ceremonial/technical handover — 8 Mar 2015 is the public revenue-service opening.", "opened": "2015-03-08", "segment": { "fromStopIndex": 6, "toStopIndex": 12 }, "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (PL)", "quote": "8 marca 2015 o godz. 9:30 centralny odcinek II linii metra został uruchomiony", "tier": "tertiary", "title": "Linia M2 metra w Warszawie — Wikipedia (PL)", "url": "https://pl.wikipedia.org/wiki/Linia_M2_metra_w_Warszawie" }, { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (PL)", "quote": "16 sierpnia 2010 w rejonie stacji Rondo Daszyńskiego rozpoczęto prace przygotowawcze", "tier": "tertiary", "title": "Linia M2 metra w Warszawie — Wikipedia (PL) (preparatory works)", "url": "https://pl.wikipedia.org/wiki/Linia_M2_metra_w_Warszawie" }, { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "quote": "The initial segment of M2, measuring 6.3 kilometres ... with seven stations, connected Rondo Daszyńskiego to Dworzec Wileński and included the Świętokrzyska interchange station with M1.", "tier": "tertiary", "title": "M2 (Warsaw) — Wikipedia (EN)", "url": "https://en.wikipedia.org/wiki/M2_(Warsaw)" } ], "stationCount": 7 }, { "confidence": "high", "constructionStart": "2016", "cost": { "basis": "budget", "confidence": "high", "nominal": { "currency": "PLN", "isEstimate": false, "value": 1066741484, "year": 2016 }, "notes": "Construction CONTRACT value (gross) awarded to Astaldi S.p.A. for the eastern section: 1 066 741 483,79 zł brutto. This is the contract/authorized value, not a separately reported final outturn — hence basis 'budget'. Price level ~2016 (contract signing).", "sources": [ { "accessedAt": "2026-07-14", "kind": "primary", "publisher": "ZTM Warszawa", "quote": "Astaldi S.p.A. ... wartość kontraktu 1 066 741 483,79 zł brutto; stacje Szwedzka (C16), Targówek (C17), Trocka (C18)", "tier": "primary", "title": "Druga linia metra – odcinek wschodni (Praga-Północ i Targówek) — ZTM Warszawa", "url": "https://www.ztm.waw.pl/inwestycje/druga-linia-metra-odcinek-wschodni-praga-polnoc-i-targowek/" } ] }, "geometryRef": "warsaw-M2", "id": "warsaw-m2-2019-trocka", "kind": "extension", "label": { "en": "Eastern extension (\"3+3\"): Dworzec Wileński → Trocka" }, "notes": "Added Szwedzka (C16), Targówek Mieszkaniowy (C17), Trocka (C18). Contract signed 11 Mar 2016; site handover late March 2016; TBM tunnelling from ~2017.", "opened": "2019-09-15", "segment": { "fromStopIndex": 3, "toStopIndex": 6 }, "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (PL)", "quote": "Otwarcie odcinka wschodniego (do stacji Trocka) nastąpiło 15 września 2019", "tier": "tertiary", "title": "Linia M2 metra w Warszawie — Wikipedia (PL)", "url": "https://pl.wikipedia.org/wiki/Linia_M2_metra_w_Warszawie" } ], "stationCount": 3 }, { "confidence": "high", "cost": { "basis": "budget", "confidence": "high", "nominal": { "currency": "PLN", "isEstimate": false, "value": 1147999590, "year": 2016 }, "notes": "Construction CONTRACT value (gross) awarded to Gülermak for the western section: 1 147 999 590,00 zł brutto. Contract/authorized value, not a separately reported final outturn — basis 'budget'. Price level ~2016 (contract signing).", "sources": [ { "accessedAt": "2026-07-14", "kind": "primary", "publisher": "Miasto Stołeczne Warszawa", "quote": "Wykonawcą odcinka zachodniego jest ... turecka firma Gülermak ... kwota kontraktu wynosi 1.147.999.590,00 zł brutto ... Umowę ... podpisano 29 września 2016 roku", "tier": "primary", "title": "Umowa na budowę zachodniego odcinka metra podpisana — Miasto Warszawa", "url": "https://um.warszawa.pl/-/umowa-na-budowe-zachodniego-odcinka-metra-podpisana" } ] }, "geometryRef": "warsaw-M2", "id": "warsaw-m2-2020-ksiecia-janusza", "kind": "extension", "label": { "en": "Western extension (\"3+3\"): Rondo Daszyńskiego → Księcia Janusza" }, "notes": "Added Płocka (C08), Młynów (C07), Księcia Janusza (C06), ~3.4 km. Contract signed 29 Sept 2016 (38-month term). constructionStart omitted: only contract/permit dates are documented, not a cleanly-dated physical-works start.", "opened": "2020-04-04", "segment": { "fromStopIndex": 12, "toStopIndex": 15 }, "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (PL)", "quote": "Odcinek zachodni został uruchomiony 4 kwietnia 2020 roku ... trzy stacje: C6 Księcia Janusza, C7 Młynów, C8 Płocka", "tier": "tertiary", "title": "Linia M2 metra w Warszawie — Wikipedia (PL)", "url": "https://pl.wikipedia.org/wiki/Linia_M2_metra_w_Warszawie" } ], "stationCount": 3 }, { "confidence": "high", "cost": { "basis": "budget", "confidence": "high", "nominal": { "currency": "PLN", "isEstimate": true, "value": 959000000, "year": 2018 }, "notes": "Reported investment value of the Wola–Bemowo section as 'over 959 mln zł' (~70% EU-financed) — an approximate value ('>959 mln'), hence isEstimate=true and basis 'budget'. Price level ~2018 (contract signing).", "sources": [ { "accessedAt": "2026-07-14", "kind": "primary", "publisher": "ZTM Warszawa", "quote": "dwie stacje ... Ulrychów i Bemowo ... wartość inwestycji przekracza 959 mln zł, z czego blisko 70% finansowane jest ze środków UE; umowę podpisano 15 listopada 2018", "tier": "primary", "title": "Druga linia metra – odcinek zachodni (Bemowo) — ZTM Warszawa", "url": "https://www.ztm.waw.pl/inwestycje/druga-linia-metra-odcinek-zachodni-bemowo-wraz-z-zapleczem-technicznym/" } ] }, "geometryRef": "warsaw-M2", "id": "warsaw-m2-2022-bemowo", "kind": "extension", "label": { "en": "Western extension (\"3+5\"): Księcia Janusza → Bemowo" }, "notes": "Added Ulrychów (C05) and Bemowo (C04), ~2.5 km. Contract signed 15 Nov 2018 (Gülermak + Astaldi consortium). Physical construction started 2019 (not precisely dated), so constructionStart omitted.", "opened": "2022-06-30", "segment": { "fromStopIndex": 15, "toStopIndex": 17 }, "sources": [ { "accessedAt": "2026-07-14", "kind": "primary", "publisher": "Miasto Stołeczne Warszawa", "quote": "30 czerwca 2022 miało miejsce oddanie do użytku stacji: Ulrychów i Bemowo", "tier": "primary", "title": "Coraz bliżej uruchomienia odcinka II linii metra na Bemowie — Miasto Warszawa", "url": "https://um.warszawa.pl/-/coraz-blizej-uruchomienia-odcinka-ii-linii-metra-na-bemowie" } ], "stationCount": 2 }, { "confidence": "high", "cost": { "basis": "budget", "confidence": "high", "nominal": { "currency": "PLN", "isEstimate": false, "value": 1397895000, "year": 2019 }, "notes": "Construction CONTRACT value for the eastern-northern extension: 1 397 895 000 zł (Astaldi + Gülermak consortium). Contract/authorized value, not a separately reported final outturn — basis 'budget'. Price level ~2019 (contract).", "sources": [ { "accessedAt": "2026-07-14", "kind": "primary", "publisher": "ZTM Warszawa", "quote": "wartość kontraktu 1 397 895 000 zł ... konsorcjum Astaldi i Gülermak ... 36 miesięcy; stacje C19 Zacisze, C20 Kondratowicza, C21 Bródno", "tier": "primary", "title": "Druga linia metra – odcinek wschodni (Bródno) — ZTM Warszawa", "url": "https://www.ztm.waw.pl/inwestycje/druga-linia-metra-odcinek-wschodni-2/" } ] }, "geometryRef": "warsaw-M2", "id": "warsaw-m2-2022-brodno", "kind": "extension", "label": { "en": "Eastern extension (\"3+5\"): Trocka → Bródno" }, "notes": "Added Zacisze (C19), Kondratowicza (C20), Bródno (C21). Astaldi + Gülermak consortium, 36-month term; TBM tunnelling began ~May 2020. constructionStart omitted as the physical-works start is not cleanly dated in sources.", "opened": "2022-09-28", "segment": { "fromStopIndex": 0, "toStopIndex": 3 }, "sources": [ { "accessedAt": "2026-07-14", "kind": "news", "publisher": "muratorplus.pl", "quote": "Trzy stacje – Zacisze, Kondratowicza i Bródno – zostały otwarte 28 września 2022", "tier": "secondary", "title": "II linia metra na Bródno otwarta 28 września 2022! — muratorplus.pl", "url": "https://www.muratorplus.pl/inwestycje/inwestycje-publiczne/ii-linia-metra-otwarcie-bemowo-pociagi-juz-jezdza-metro-na-bemowo-i-brodno-aa-tMhs-7aav-FEmE.html" } ], "stationCount": 3 } ], "sources": [ { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (PL)", "tier": "tertiary", "title": "Linia M2 metra w Warszawie — Wikipedia (PL)", "url": "https://pl.wikipedia.org/wiki/Linia_M2_metra_w_Warszawie" }, { "accessedAt": "2026-07-14", "kind": "wikipedia", "publisher": "Wikipedia (EN)", "tier": "tertiary", "title": "M2 (Warsaw) — Wikipedia (EN)", "url": "https://en.wikipedia.org/wiki/M2_(Warsaw)" } ] } ], "name": { "en": "Warsaw", "pl": "Warszawa" } } ] }