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.