M6, officially referred to as the M6 Levent – Hisarüstü/Boğaziçi Üniversitesi line, is a 3.3-kilometre (2.1 mi)[1]light metro line of the Istanbul Metro. The line opened for public service on 19 April 2015.[2] The line is the shortest of the Istanbul Metro system with only four stations.[1]
It was initially planned to go into public service on 29 October 2014, on the Republic Day, but the metro line ultimately opened on 19 April 2015.[2]
The construction of a funicular line is under consideration to connect the Hisarüstü-end station with the shoreline of the Bosphorus in the Aşiyan neighborhood.[6]