Tags: Road Tunnel.
Ordu Nefise Akçelik Tunnel (Turkish: Ordu Nefise Akçelik Tüneli) originally Hapan Tunnel (Turkish: Hapan Tüneli) is a highway tunnel constructed in Ordu Province northern Turkey. With its length of 3820 m (12530 ft) it is the country’s longest tunnel. The tunnel is named in honor of the Turkish female civil engineer and earth scientist Nefise Akçelik (1955-2003).