
The Eurasia Tunnel is a road tunnel in Istanbul, Turkey, crossing underneath the Bosphorus strait. The tunnel was officially opened on 20 December 2016 and opened to traffic on 22 December 2016. The 5.4 km double-deck tunnel connects Kumkapı on the European part and Koşuyolu, Kadıköy, on the Asian part of Istanbul with a 14.6 km route including the tunnel approach roads.