Ordu Nefise Akçelik Tunnel

Ordu Nefise Akçelik Tunnel (Ordu Nefise Akçelik Tüneli), originally Hapan Tunnel, (Hapan Tüneli) is a highway tunnel constructed in Ordu Province, northern Turkey. With its length of 3,825 m (12, 549 ft), it was the country's longest tunnel at the time of its opening. The tunnel is named in honor of the Turkish female civil engineer and earth scientist Nefise Akçelik (1955-2003).