Gümüşhane-Kelkit, Pirahmet Tunnel (projected) – 2 x 463 m Balıkesir(Bigadiç)-Kütahya(Simav), Demirci-Düvertepe Tunnels, T5 Tunnel (projected) – 2 x 459 m Hakkari-Ördekli Tunnels, T3 (projected) – 1 x 450 m Antalya, Demre-Kaş, Cut-Cover (Hoyran) Tunnel (projected) – 2 x 400 m Bolu(Mudurnu)-Sakarya(Akyazı), Tavşansuyu (T6) Tunnel (projected) – 2 x 395 m Giresun Ring Road, Gülyalı-Keşap T12 Tunnel (projected) – 2 x 388 m Kayseri, Şehit Tümgeneral Aydoğan Aydın Tunnel (projected) – 2 x 375 m Ardahan(Posof), Binbaşı Eminbey Cut-Cover Tunnel (projected) – 2 x 350 m Trabzon Bypass Road, Çukurçayır-2 Tunnel (projected) – 2 x 300 m Gümüşhane(Kürtün)-Trabzon(Tonya), T1 Tunnel (projected) – 1 x 300 m Gümüşhane(Kürtün)-Trabzon(Tonya), T2 Tunnel (projected) – 1 x 260 m Antalya, Kaş-Kalkan, Çukurbağ Tunnel (projected) – 2 x 250 m Bolu(Mudurnu)-Sakarya(Akyazı), Allıbelen (T1) Tunnel (projected) – 2 x 200 m Fatsa Beltway, T4 Tunnel (projected) – 2 x 190 m Fatsa Beltway, T6 Tunnel (projected) – 2 x 190 m Balıkesir, İvrindi-Havran, Evciler Tunnel (projected) – 2 x 171 m Hatay, Dörtyol-Hassa, Amanos T3 Tunnel (projected) – 2 x 150 m Giresun Ring Road, Gülyalı-Keşap T10 Tunnel (projected) – 2 x 90 m Bolu(Mudurnu)-Sakarya(Akyazı), Mudurnu-Akyazı Cut-Cover Tunnel (projected) – 2 x 57 m Inactive road tunnels Antalya-Beldibi, Akyarlar Tunnel (inactive) – 1 x 900 m İstanbul, Beylerbeyi Palace Tunnel (inactive) – 1 x 150 m Antalya-Beldibi, Çamdağ Tunnel (inactive) – 1 x 130 m Road-rail tunnels Great Istanbul Tunnel, Bosphorus Subsea Three Layered Tunnel (projected) – 3 x 4,300 m İzmir Ring Road, İZKARAY Subsea Road-Rail Tunnel (projected) – 3 x 1,797 m Road tunnels in Northern Cyprus Northern Cyprus, Değirmenlik-Girne, Beşparmak Motorway Tunnel (projected) – 2 x 7,000 m Northern Cyprus, Değirmenlik-Girne, Beşparmak Ridgeway Tunnel (projected) – 2 x 5,000 m Northern Cyprus, Ercan-Akıncılar Tunnel – 2 x 500 m Motorway tunnels KMO 5. Section, Kocaeli T2 Motorway Tunnel – 2 x 4,159 m İstanbul Habibler-Hasdal, Cebeci Motorway Tunnel – 2 x 4,005 m Bursa-Yalova, Orhangazi (Samanlı) Motorway Tunnel – 2 x 3,591 m Bolu-Düzce(Kaynaşlı), Mount Bolu Motorway Tunnel – 2 x 3,125 m İzmir(Belevi)-Aydın(Germencik), Selatin Motorway Tunnel – 2 x 3,043 m Osmaniye(Bahçe), Kızlaç Motorway Tunnel – 2 x 2,860 m KMO 5. Section, Kocaeli T4 Motorway Tunnel - 2 x 2,150 m İstanbul, Çatalca-1 Motorway Tunnel - 2 x 2,145 m İzmir, Bayraklı-2 Motorway Tunnel – 2 x 1,876 m İzmir, Belkahve Motorway Tunnel – 2 x 1,653 m KMO 5. Section, Kocaeli