Demirciköy Tunnel

Demirciköy Tunnel (Turkish: Demirciköy Tüneli), is a highway tunnel constructed in Sinop Province, northern Turkey.

Demirciköy Tunnel is part of the Sinop-Samsun Highway within the Black Sea Coastal Highway, of which construction was carried out by the Turkish Dağcan Construction and Trade Company Inc. The 1,680 and 1,680 m (5,510 and 5,510 ft)-long twin-tube tunnel carrying two lanes of traffic in each direction is flanked by 1,285–1,285 m (4,216–4,216 ft)-long Çiftlik Tunnel in the north and 348–348 m (1,142–1,142 ft)-long Gerze Tunnel in the south on the same highway.

The tunnel was opened to traffic on March 26, 2014.