Thomson–East Coast Line

The Thomson–East Coast Line (TEL) is a medium-capacity Mass Rapid Transit (MRT) line in Singapore. Coloured brown on the rail map, it is fully underground. When fully completed, the sixth line on the country's MRT network will serve 36 stations around 57 kilometres (35 mi) in length, becoming one of the world's longest driverless rapid transit lines. It runs along a combined north–south and east–west corridor, starting in the north at Woodlands town, passing through Upper Thomson and the towns of Ang Mo Kio and Bishan, heading south to the city-centre at Orchard Road and Marina Bay, subsequently heading eastwards along the eastern coast of the country through Kallang, Marine Parade, southern Bedok and Upper East Coast, before passing through Changi Airport and ending at Tanah Merah.

The line was first announced by the Land Transport Authority (LTA) on 15 August 2014, merging the previously planned and distinct Thomson (TSL) and Eastern Region (ERL) lines. By then, construction of the TSL had already begun in January 2014. The line is being opened in stages, beginning with Stage 1 on 31 January 2020. Stage 2 opened on 28 August 2021 and Stage 3 opened on 13 November 2022. Stage 4 opened on 23 June 2024 while Stage 5 is scheduled to open from the second half of 2026. Meanwhile, Mount Pleasant and Marina South stations, which were structurally completed as part of Stage 3, remain non-operational due to the perceived lack of developments in the area at this given time.

In January 2019, an infill station known as Founders' Memorial was announced to complement its namesake. Construction of the station began in 2019 and is planned to open in 2028. In addition, LTA also confirmed the integration of the Changi Airport Branch, which is currently part of the East–West Line (EWL), into the TEL. When fully opened, it is expected to serve about 500,000 commuters daily in the initial years before rising to one million in the long-term. It is the fourth MRT line to be operated by SMRT Trains Ltd and also the fourth to be completely automated and driverless. The line is currently served by Mandai Depot, with the East Coast Integrated Depot opening in the second half of 2026, and services are operated by the T251 electric multiple unit (EMU) rolling stock manufactured by Kawasaki–CRRC.

New and improved signage was introduced to all stations along the TEL, which saw less text and wordiness, in favour of more illustrations and visuals. In addition, the exits are represented numerically rather than alphabetically. Other MRT and LRT lines are also represented by their initials. Outside the TEL, the new signage is being gradually rolled out to other existing and future MRT and LRT stations across the network.