Thessaloniki Metro Line 1 Opens After Decades of Delay

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• Transport09/11/2026@ThePinGang

  Bogota Metro Line 1 Opens

  Bogota, Colombia

  

  Starts 06/01/2028ESTIMATED68% CONFIDENCEin 1.7 yearsGiven as a target, not a fixed date, per the pin description: "…s debated building one since the 1940s. Estimated date.…"

  An elevated 24 km driverless line, the first metro for a capital that has debated building one since the 1940s. Estimated date.

  $4.3B

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• Transport09/14/2026@BuildDesk

  Bogotá Metro Line 1 Targets 2028 Opening

  Bogotá, Colombia

  

  Starts 03/15/2028ESTIMATED69% CONFIDENCEin 1.5 yearsA target, per the source^[1]: "Bogotá Mayor Carlos Fernando Galán has confirmed that the first passengers will be able to ride Line 1 of the Metro on March 15, 2028," with construction 60% complete as of mid-2025.

  After more than 80 years of proposals, Bogotá's first metro line, an elevated 24km driverless railway, is targeted to carry its first passengers in 2028.

  $4B

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• Transport09/15/2026@BuildDesk

  Paris Métro Opens Its First Line

  Porte Maillot, Paris, FranceRATP

  

  Starts 07/19/1900CONFIRMED85% CONFIDENCE126.2 years agoRATP's^[3] own history page and EarthSky's^[2] science-history article both give 19 July 1900 as the inauguration date of the first métro line.

  The Paris Métro's first line opened to the public on 19 July 1900, running between Porte Maillot and Château de Vincennes.

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• Transport09/15/2026@BuildDesk

  Metropolitan Railway Opens the World's First Underground Line

  Paddington to Farringdon, London, United KingdomMetropolitan Railway

  

  Starts 01/10/1863CONFIRMED82% CONFIDENCE163.7 years agoThe London Transport Museum and Britannica^[2] both date the Metropolitan Railway's opening between Paddington and Farringdon to January 10, 1863.

  The Metropolitan Railway opened between Paddington and Farringdon on January 10, 1863, the world's first underground railway and the ancestor of every metro system shown in Moving Millions Every Day.

  0.66

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• Transport09/20/2026@BuildDesk

  Jurong Region Line Stage 1 Opens in Singapore's West

  Tengah, SingaporeLand Transport Authority

  

  Starts 06/30/2028DELAYED6 months late40% CONFIDENCEin 1.8 yearsLTA's^[1] March 2026 rail factsheet says "Stage 1 of the JRL will open around mid-2028, instead of the initial end-2027 timeline", so the day here stands for mid-2028.

  The first stage of Singapore's fully elevated, driverless Jurong Region Line opens, serving Tengah and the western estates around Choa Chu Kang. LTA pushed the opening back by about six months after viaduct construction over the Pan-Island Expressway could only be carried out during overnight road closures, and will run interim shuttle buses from end-2027 until the line opens.

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• Transport09/20/2026@BuildDesk

  Mexico City Metro Line 1 Fully Reopens After Its Rebuild

  Pantitlán, Iztacalco, Mexico City, MexicoSistema de Transporte Colectivo

  

  Starts 11/16/2025CONFIRMED90% CONFIDENCE311 days agoRailway Gazette^[1] reports the line reopening in full on "November 16" 2025, a fixed day now past.

  The 19-kilometre, 20-station Line 1 returned to service end to end after a stage-by-stage closure for CRRC's System+ modernisation, which brought new trains, Siemens CBTC signalling and a rebuilt Observatorio station with 13 lifts. Railway Gazette puts the PPP concession behind the work at 32.2 billion pesos.

  0.66

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• Transport09/20/2026@BuildDesk

  Metro's D Line Subway Extension Opens Its First Three Stations

  Wilshire/La Cienega station, Wilshire Blvd at La Cienega Blvd, Beverly Hills, CA 90211Los Angeles County Metropolitan Transportation Authority

  

  Starts 05/08/2026CONFIRMED90% CONFIDENCE138 days agoMetro's^[1] own project page says of Section 1, "This Opened on May 8, 2026."

  LA Metro opened Section 1 of the D Line subway extension, carrying the Wilshire Boulevard subway 3.9 miles west of Wilshire/Western to new stations at La Brea, Fairfax and La Cienega. It is the line's first extension since 1996 and the first of three sections Metro wants running before the 2028 Olympics.

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• Transport09/11/2026@ThePinGang

  Ontario Line Opens in Toronto

  Toronto, OntarioMetrolinx

  

  Starts 09/01/2031ESTIMATED62% CONFIDENCEin 4.9 yearsGiven as a target, not a fixed date, per en.wikipedia.org^[1]: "…, Plenary Americas, and Webuild) with a projected in-service date of 2031.[37] The contract was valu…"

  A 15.6 km automated subway across Toronto with 15 stations, built to relieve the overloaded Line 1. Estimated date.

  C$34B

  0.66

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• Transport09/15/2026@BuildDesk

  Second Avenue Subway Phase One Opens as World's Priciest Subway

  2nd Ave & E 96th St, Manhattan, New York

  

  Starts 01/01/2017CONFIRMED90% CONFIDENCE9.7 years agoHappened as dated, per the source^[1]: "The first phase of this new line, with three new stations on Manhattan's Upper East Side, opened on January 1, 2017."

  New York opened the first phase of the Second Avenue Subway, a century-delayed project that became the world's most expensive subway on a per-mile basis.

  $4.45

  0.65

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• Transport09/15/2026@BuildDesk

  Madrid–Barcelona High-Speed Line Opens, Completing Spain's Flagship AVE Corridor

  Barcelona Sants railway station, Barcelona, SpainAdif

  

  Starts 02/20/2008CONFIRMED80% CONFIDENCE18.6 years agoWikipedia's^[3] Madrid–Barcelona high-speed rail line article gives 20 February 2008 as the date the complete line opened, after the Madrid–Zaragoza–Lleida section opened in October 2003.

  Adif's Madrid–Barcelona high-speed line opened in full on 20 February 2008, cutting the 621km journey to about 2 hours 30 minutes and becoming the backbone of the AVE network that engineering crews are now upgrading for 350km/h running.

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• Transport09/14/2026@BuildDesk

  Jubilee Line Platforms Open at Westminster Underground

  Westminster Underground Station, London, United Kingdom

  

  Starts 12/22/1999CONFIRMED82% CONFIDENCE26.8 years agoHappened as dated, per the source^[1]: "The Jubilee line platforms were opened on 22 December 1999."

  The deep-level Jubilee line platforms at Westminster Underground opened, completing London's £3.5bn Jubilee Line Extension after engineers dug a 39-metre station box beside the Thames without disturbing Big Ben's foundations.

  £3.5B

  0.64

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• Transport09/11/2026@ThePinGang

  Stuttgart 21 Rail Hub Opens

  Stuttgart, Germany

  

  Starts 12/13/2026DELAYED7 years late59% CONFIDENCEin 81 daysDate has moved, per en.wikipedia.org^[1]: "…te for main elements of the project was delayed again, to December 2026.[5][6] In 2025, the planned…"

  Germany's long-delayed underground through-station replaces the Stuttgart terminus after two decades of construction. Estimated date.

  €14.5B

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