Göcek) Tunnel (projected) – 2 x 1,440 m Giresun Ring Road, Gülyalı-Keşap T14 Tunnel (projected) – 2 x 1,375 m Fatsa Beltway, T8 Tunnel (projected) – 2 x 1,370 m Antalya, Demre-Kaş, T3 Tunnel (projected) – 2 x 1,345 m İstanbul(Ağva)-Kocaeli(Kandıra)-Sakarya(Kaynarca) Highway, Tunnel-2 (Kandıra-Avdan) (projected) – 2 x 1,345 m Fatsa Beltway, T2 Tunnel (projected) – 2 x 1,310 m Giresun Ring Road, Gülyalı-Keşap T6 Tunnel (projected) – 2 x 1,280 m Antalya, Demre-Kaş, T4 Tunnel (projected) – 2 x 1,270 m Giresun Ring Road, Gülyalı-Keşap T5 Tunnel (projected) – 2 x 1,267 m Ardahan, Posof-Türkgözü, Eminbey Tunnel (projected) – 2 x 1,200 m Balıkesir(Bigadiç)-Kütahya(Simav), Demirci-Düvertepe Tunnels, T6 Tunnel (projected) – 2 x 1,196 m Van, Gevaş-Bahçesaray T2 Tunnel (projected) – 1 x 1,170 m Giresun Ring Road, Gülyalı-Keşap T11 Tunnel (projected) – 2 x 1,135 m Giresun Ring Road, Gülyalı-Keşap T9 Tunnel (projected) – 2 x 1,108 m Fatsa Beltway, T5 Tunnel (projected) – 2 x 1,040 m Denizli Beltway, Çamlık Tunnel (projected) – 2 x 1,000 m Giresun Ring Road, Gülyalı-Keşap T18 Tunnel (projected) – 2 x 970 m Bolu(Mudurnu)-Sakarya(Akyazı), Hisar (T4) Tunnel (projected) – 2 x 970 m Bolu(Mudurnu)-Sakarya(Akyazı), Akyar (T5) Tunnel (projected) – 2 x 965 m Kahramanmaraş, Elbistan-Ekinözü, Belan Tunnel (projected) – 1 x 960 m Giresun Ring Road, Gülyalı-Keşap T21 Tunnel (projected) – 2 x 953 m Konya Beltway, Hospital-Kırankaya, T6 Tunnel (projected) – 2 x 900 m Bolu, Mudurnu Bypass Road, Mudurnu Tunnel (projected) – 2 x 896 m İstanbul(Ağva)-Kocaeli(Kandıra)-Sakarya(Kaynarca) Highway, Tunnel-1 (Kandıra-Yağcılar) (projected) – 2 x 870 m Istanbul, Haliç Subsea Tunnel (projected) – 2 x 850 m Konya Beltway, Seydişehir-Beyşehir, T3 Tunnel (projected) – 2 x 790 m Trabzon Bypass Road, Gölçayır-2 Tunnel (projected) – 2 x 750 m Hakkari-Ördekli Tunnels, T4 (projected) – 1 x 730 m Konya Beltway, Sille-İmar1, T4 Tunnel (projected) – 2 x 720 m Konya Beltway, Çayırbağ-Seydişehir, T1 Tunnel (projected) – 2 x 705 m Giresun Ring Road, Gülyalı-Keşap T1 Tunnel (projected) – 2 x 670 m Antalya(Gazipaşa)-Karaman(Ermenek), Şahinler Tunnel (projected) – 1 x 640 m Antalya, Manavgat-Akseki, Kızıldağ (T2) Tunnel (projected) – 2 x 620 m Fatsa Beltway, T7 Tunnel (projected) – 2 x 590 m Trabzon Bypass Road, Gölçayır-1 Tunnel (projected) – 2 x 500 m Bolu(Mudurnu)-Sakarya(Akyazı), Topçamlığı (T3) Tunnel (projected) – 2 x 500 m Gümüşhane(Kürtün)-Trabzon(Tonya), T3 Tunnel (projected) – 1 x 480 m Hakkari-Ördekli Tunnels, T2 (projected) – 1 x 480 m