M11 (Istanbul Metro)

Common card · No. 284104

Line M11, officially referred to as the M11 Gayrettepe–Istanbul Airport–Halkalı Metro Line (Turkish: Gayrettepe–İstanbul Havalimanı–Halkalı Metro Hattı), is a line of the Istanbul Metro. It runs between Gayrettepe and Halkalı via Istanbul Airport. The line is 69 km (43 mi) long, making it the longest line in the Istanbul Metro. It is entirely underground, making it the second longest continuous subway tunnel in the world, and the longest in Europe. It is also the longest driverless metro line in the world. The line used to be operated by a driver on board, before becoming fully automated and driverless on 3 January 2024.

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