2021 in rail transport
Events
January
- January 31 – Milan Metro line M4 opening.
- – Bangkok's Red Line Mass Transit System Project's opening.
- - Possible opening of the Center City Corridor expansion of LYNX streetcar service in Charlotte, North Carolina.
March
- – Blackpool Tramway extension to Blackpool North railway station expected to be completed.
- – Honolulu Rail Transit is expected to begin limited passenger operations.
April
- April 1 – The Washington Metro Silver Line is projected to be extended to Ashburn station via Washington Dulles International Airport.
- – Greater Jakarta LRT opening.
June
- – Planned opening of the Central Subway in San Francisco, after repeated delays.
July
- – Planned opening of MRT Sungai Buloh-Serdang-Putrajaya Line phase 1.
August
- August 9 – Tampere light rail opening.
November
- – Serbia's Stara Pazova–Novi Sad railway to start high-speed operation.
December
- – Planned opening of Green Line Extension to Somerville and Medford, Massachusetts.
- – Planned opening of Vientiane–Boten railway, 160 km/h service.
Unknown date
- – The third line of Minsk Metro, with automated Stadler trains, is expected to open.
- – Several São Paulo Metro lines opening.
- – The first phase of the Réseau express métropolitain in Montreal is scheduled to open.
- – Yonge–University–Spadina Line is expected to introduce ATC at the full length of line.
- – Expected completion of Edmonton's Valley Line.
- – Due to rapid expansion and lack of commuter train services, the length of Beijing Subway is expected to reach 998,5 km.
- – Odense Letbane opening.
- – upgrading of Ringsted - Fehrman line will speed up services to Germany.
- – Indonesia's Jakarta–Bandung high-speed rail operation start.
- – Expected opening of Toluca–Mexico City commuter rail.
- – Amsterdam metro to introduce 24-hour operation during weekends.
- – Riyadh Metro to reach its peak length of 176 km.
- – Moscow Central Circle is claimed to start driverless operation.
- – Grand Central's Euston to Blackpool service scheduled to commence.
- – Northern line extension to Battersea.
- – Barking Riverside railway station and approach to it to be completed.
- – Las Vegas Monorail is expected to extend service to a station at Mandalay Bay Casino.
- – Seattle's Northgate Link extension is scheduled to open.
- – OC Streetcar is expected to begin service in Orange County, California.
- – The Mid-Coast Trolley extension is expected to begin service in San Diego, California.
- – Caltrain service in California is expected to be extended to Salinas.
- Summer – Avelia Liberty trains are expected to be introduced, replacing Acela Express trains along the Northeast Corridor.
- – Earliest year stated in which commuter rail service is to be restored along the Lackawanna Cut-Off in New Jersey.
- - Expected opening of the Tempe Streetcar in the Phoenix, Arizona area.
- – Los Angeles County Metropolitan Transportation Authority's Crenshaw/LAX Line expected to open after several delays.
- - Tri-Rail Downtown Miami Link is expected to open.