Selçukgazi Tunnel

The Selçukgazi Tunnel (Selçukgazi Tüneli) is a motorway tunnel located at Dürdane Hill in Marmara Region as part of the Istanbul-Bursa Motorway in Turkey.

Situated near Selçukgazi village in Osmangazi district between Gemlik and Bursa, it is a twin-tube tunnel of 1192 and 1303 m. The construction is carried out by Otoyol A.Ş., a consortium of Turkish Nurol, Özaltın, Makyol, Yüksel, Göçay and Italian Astaldi companies. Works at the tunnel began in July 2013, and are continuing. In March 2014, it was announced that the preparatory works are completed and tunneling will start soon.

The tunnel was opened to traffic on March 12, 2017 by Turkish Prime Minister Binali Yıldırım.

Other tunnels on the route are the 3586 and 3591 m-long Orhangazi Tunnel and the 1556 and 1653 m-long Belkahve Tunnel.