Events
January
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January 4– The Island Line, Isle of Wight temporarily closes for renovations and Class 483 units are withdrawn from service. [1] The cars originally operated on the London Underground starting in 1938. -
January 22– Opening of the full Beijing–Shenyang high-speed railway. [2] -
January 28– Opening of Porte de Clichy station on Paris Métro Line 14. [3]
February
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February 7– Transport for Wales Rail takes over the Wales & Borders franchise from KeolisAmey Wales. [4] -
February 27– Metrorrey Line 3 commences operation in Monterrey, Mexico. [5]
March
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March 4– Opening of 172 km (107 mi) stretch of North-South Railway. [6] -
March 26– Sohag train collision -
March 27– Line 5 of the Seoul Subway is extended to Hanam Geomdansan. [7]
April
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April 1– The Moscow Metro Bolshaya Koltsevaya line is extended to Mnyovniki. [8] -
April 1– Formal closure of the Hidaka Main Line in Hokkaido -
April 2– Hualien train derailment -
April 6– The Te Huia passenger service between Hamilton and Papakuri begins, [9] including the opening of a new transit hub in Hamilton. [10] [11] - April 10 – The Île-de-France tramway Line 9 opens. [12]
- April 18– Toukh train accident
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April 24– Line 3 of the Sofia Metro is extended from Krasno Selo to Gorna Banya - April 25– Taichung Metro's Green Line commences operation in Taichung. [13] The line had opened the previous November, but was shut down for repairs after trains exhibited faulty couplers.
May
- May 3– Mexico City Metro overpass collapse
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May 6– Flixtrain begins operating long-distance passenger services from Stockholm to Gothenburg. [15] -
May 10– SNCF open-access operator Ouigo España begins low-cost high-speed rail passenger services over the Madrid–Barcelona high-speed rail line. [16] -
May 24– Kelana Jaya LRT collision
June
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June 7– 2021 Ghotki train collision: The Millat Express from Karachi derails near Daharki in Sindh province and the Sir Syed Express coming in the opposite direction collides with it and overturns, killing at least 50. [17] - June 23– Renfe begins Avlo low-cost high-speed rail passenger services over the Madrid–Barcelona high-speed rail line. [16]
- June 25
- – Lhasa-Nyingchi Railway, Xiamen Metro Line 3 begins operation.
- – The first phase of Jiaxing Tram begins operation.
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- June 26– Zhengzhou Metro Line 3 Extension begins operation.
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June 27– The Tuen Ma Line fully opens, with a new section between Hung Hom and Kai Tak. [18] - June 28– Mianyang–Luzhou high-speed railway (Neijiang-Zigong-Luzhou section), Hangzhou Metro Line 8, Hangzhou–Haining intercity railway, Shaoxing Metro Line 1 (Keqiao–Guniangqiao section), [19] Changzhou Metro Line 2, Xuzhou Metro Line 3 begins operation.
- June 29– Xi'an Metro Line 14 begins operation and merges with the former Airport Intercity Line; [20] Suzhou Rail Transit Line 5 begins operation. [21]
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June 30– Metro Express (Mauritius) extended by 2 stations (Phase 2A). [22]
July
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July 5– Manila LRT Line 2 East Extension opens. [23] - July 20– 2021 Henan floods overwhelm part of Zhengzhou Metro Line 5, killing 14. [24]
August
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August 2– SRT Dark Red Line of Bangkok suburban railway system begins operation. [25] -
August 4– Milavče train crash -
August 6– The final section of the Delhi Metro Pink Line between Trilokpuri Sanjay Lake and Mayur Vihar Pocket I opens after being previously delayed due to land acquisition and rehabilitation issues.[ citation needed ] -
August 9– The Tampere light rail system begins operation with Lines 1 and 3. [26] [27] [28] - August 18– The initial section of Foshan Nanhai Tram Line 1 opened. [29]
- August 26– Line 7 and Batong line of Beijing Subway extended to Universal Resort station. [30]
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August 28– Thomson–East Coast MRT line Stage 2 opens. [31] - August 29– Through operation of Line 1 and Batong line of Beijing Subway started. [32]
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August 30– Opening of the Center City Corridor expansion of LYNX streetcar service in Charlotte, North Carolina. [33]
September
- September 19– Opening of Line 2 of Harbin Metro.
- September 20– Opening of the Northern line extension to Battersea [34] in London.
- September 25– Montana train derailment
October
- October 2– Opening of the Northgate Link extension in Seattle. [35]
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October 25– Opening of the T3 line of AntRay tram in Antalya between Varsak and Müze stations. [36] - October 25– Opening of the Odunluk station of Bursaray in Bursa. [37]
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October 31– Salisbury rail crash
November
- November 1– The Island Line, Isle of Wight recommenced service after upgrades and began using Class 484 units. [38]
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November 6– Opening of Hanoi Metro. The first line 2A (Cat Linh Line) started to operate. [39] - November 18– Amtrak Cascades service restarts over the Point Defiance Bypass. The rail line was closed in 2017 after the service's inaugural run through the corridor resulted in a derailment. [40]
- November 20– Regular scheduled passenger services recommence on the Dartmoor Line between Crediton and Okehampton. [41]
- November 21
- – The Mid-Coast Trolley extension of the San Diego Trolley Blue Line opens for service in San Diego, California. [42]
- – The Philippine National Railways' first standard-gauge electric multiple unit stock for the North–South Commuter Railway was delivered. [43]
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- November 26– Harbin Metro Line 3 was extended on both ends to Sports Park on the west and to Taipingqiao on the east.
December
- December 3
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– Boten–Vientiane railway opens. [44] - – Yuxi–Mohan railway opens. [45]
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- December 7– 10 stations of the Bolshaya Koltsevaya line of the Moscow Metro, between Mnyovniki and Kakhovskaya, open. [46]
- December 11– Karlsruhe Stadtbahn city centre tunnel opened. [47]
- December 16– Kaohsiung begins trial run of the section between Gushan District Office and TRA Museum of Fine Arts stations on the Circular light rail. [48]
- December 17– São Paulo Metro Line 4 extension to Vila Sônia opens. [49] [50]
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December 27– TER Dakar phase 1 opening. - December 28
- – The inaugural section of Kanpur Metro with nine stations opened. [51]
- – Opening of the Nanjing Metro Line S6, and the west extension of Line 2. [52]
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- December 29– Opening of São Paulo Metro Line 15 extension to Jardim Colonial. [53] [ failed verification ]
- December 31– Opening of Line 11, Line 17, Line 19; extensions of Capital Airport Express, Changping line, Line S1, Line 16; and the central sections of Line 8 and Line 14 of Beijing Subway. [54] [55]
