Kadıoğlu Tunnel

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

Kadıoğlu Tunnel is part of the Samsun-Ordu Highway within the Black Sea Coastal Highway, of which construction was carried out by the Turkish Nurol-Tekfen-Yüksel joint venture. The 116 and 150 m (381 and 492 ft)-long twin-tube tunnel carrying two lanes of traffic in each direction. The Kozbükü Tunnel follows the Kadıoğlu Tunnel in direction Ordu.

The tunnel was opened to traffic on April 7, 2007 by Turkish Prime Minister Recep Tayyip Erdoğan. Dangerous goods carriers are not permitted to use the tunnel.