 The tunnel is named in honor of the Turkish female civil engineer and earth scientist Nefise Akçelik (1955-2003).Ordu Nefise Akçelik Tunnel is part of the Samsun-Ordu Highway within the Black Sea Coastal Highway, the construction of which was carried out by the Turkish Nurol-Tekfen-Yüksel joint venture.The cost of the tunnel totalled to TL 361 million (approx.