Grand Paris Express Line 15 South Opens

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• Transport09/15/2026@BuildDesk

  Grand Paris Express Line 15 South Pushed to Autumn 2027

  Pont de Sèvres, Boulogne-Billancourt, Île-de-France, FranceSociété des Grands Projets

  

  Starts 09/30/2027DELAYED7 years late56% CONFIDENCEin 1.0 yearsGiven as scheduled, per the source^[1]: "In autumn 2027, the South Line 15 should be up and running between Pont de Sevres and Noisy-Champs."

  The first section of Line 15, the 76km ring at the heart of the Grand Paris Express, has slipped repeatedly and is now expected to open between Pont de Sevres and Noisy-Champs in autumn 2027.

  $45B

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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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• Transport09/11/2026@ThePinGang

  Grand Paris Express Line 17 Complete

  Le Bourget, France

  Starts 06/01/2030ESTIMATED66% CONFIDENCEin 3.7 yearsGiven as a target, not a fixed date, per the pin description: "…e Airport and the Parc des Expositions. Estimated date.…"

  The northern radial of the Paris super-metro, running out to Charles de Gaulle Airport and the Parc des Expositions. Estimated date.

  0.70

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• Transport09/20/2026@BuildDesk

  CDG Express Starts Running From Gare de l'Est to Roissy

  Gare de l'Est, 10th arrondissement, Paris, FranceSNCF

  

  Starts 03/28/2027DELAYED20.5 years late63% CONFIDENCEin 186 daysThe project's own history page says "When it enters service on 28 March 2027, the CDG Express^[1][2] will realise a vision first imagined more than 30 years ago".

  The 32 km non-stop link will run every 15 minutes from 5am to midnight between Gare de l'Est and Charles de Gaulle Airport, a 20-minute trip, operated by Hello Paris, a Keolis and RATP Dev joint venture. The infrastructure company, owned in equal shares by Groupe ADP, SNCF Reseau and Banque des Territoires, says it financed the entire project without public subsidies, and CAF France of Alsace supplied the trainsets.

  0.70

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• Transport09/20/2026@BuildDesk

  GTX-B Express Line Opens Between Incheon and Namyangju

  Seoul Station, Jung-gu, SeoulKorea National Railway

  

  Starts 12/31/2030ESTIMATED50% CONFIDENCEin 4.3 yearsThe Korea Herald's^[1] report on the 7 March 2024 groundbreaking gives a target opening year of "2030", so the pin sits at the end of that year.

  The 82 km GTX-B runs from Incheon National University Station in Songdo through Yeouido, Yongsan, Seoul Station and Cheongnyangni to Maseok in Namyangju, serving 14 stations and cutting the Songdo to central Seoul trip to about 30 minutes. Construction began on 7 March 2024.

  ₩6.8T

  0.67

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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

  0.67

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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.

  0.66

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• Transport09/15/2026@BuildDesk

  Elizabeth Line's Tottenham Court Road Station Opens

  Tottenham Court Road Elizabeth Line Station, London, UKTransport for London

  

  Starts 05/24/2022CONFIRMED90% CONFIDENCE4.3 years agoConfirmed against contemporary reporting on the central section's opening. Happened as dated, per the source^[1]: "The Elizabeth line opened on Tuesday 24 May 2022".

  London's £18.9BN Elizabeth Line opens through central London, bringing its new Tottenham Court Road station into service after years of Crossrail tunnelling and delay.

  £18.9B

  0.66

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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.

  0.66

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• Transport09/20/2026@BuildDesk

  São Paulo's Line 17-Gold Monorail Opens to Congonhas Airport

  Morumbi, São Paulo, BrazilSão Paulo Metro

  

  Starts 03/31/2026CONFIRMED90% CONFIDENCE176 days agoThe report states that "the initial 6.7 km section of monorail Line 17-Gold in São Paulo was inaugurated on March 31, no less than 12 years behind its original planned opening date".^[1]

  The 6.7 km first section links Congonhas Airport with Morumbi on suburban rail Line 9 through seven stations, twelve years behind the 2014 World Cup deadline it was first built for. Trains initially run only between 10.00 and 15.00 at headways of seven to fourteen minutes, with full service expected from October 2026.

  R$6B

  0.66

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• Transport09/20/2026@BuildDesk

  MARTA Opens the Rapid A-Line, Its First Bus Rapid Transit Route

  Summerhill, Atlanta, GA 30312Metropolitan Atlanta Rapid Transit Authority

  

  Starts 04/18/2026CONFIRMED90% CONFIDENCE158 days agoMARTA's own project page states that "The first phase of service began April 18, 2026," with construction to be completed and final revenue service to begin in Fall 2026.^[1]

  MARTA started service on the Rapid A-Line, a five-mile route with 14 new stations linking downtown Atlanta to Capitol Gateway, Summerhill, Peoplestown and the BeltLine's Southside Trail, much of it in dedicated bus lanes. Construction continues along the corridor, with temporary stops standing in at five stations until final revenue service in the autumn.

  0.65

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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

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