Istanbul LRT
The Istanbul LRT is a light rail transit system consisting of 2 lines. The first line (M1) began service on 3 September 1989 between Aksaray and Kartaltepe. The line was further developed step-by-step and reached Atatürk Airport on 20 December 2002. The other line (T4) was opened in 2007 between Edirnekap and Mescid-i Selam. There are 36 stations, including 12 underground and 3 viaduct stations, on the line's 32 km length. The lines are totally segregated from other traffic, without level crossings, and run underground for 10.4 km. Service is operated with LRT vehicles built by ABB in 1988.