Istanbul Metro A train entering Levent on the M2 line. Overview Native name İstanbul Metrosu Owner Istanbul Metropolitan Municipality Locale Istanbul, Turkey Transit type Rapid transit Number of lines 8 (5 more under construction) Number of stations 82 in service;[1] 62 under construction Annual ridership 384.9 million (2015)[2] Website Metro Istanbul (in English) Operation Began operation 3 September 1989 (1989-09-03) Operator(s) Metro Istanbul Number of vehicles 579[1] Technical System length 105.8 km (65.7 mi)[1] Track gauge 1,435 mm (4 ft 8 1⁄2 in) (standard gauge) System map