The total length of 15,4 km, 3.34 km two story undersea 2 x 2 highway tunnel with a diameter of 13.70m (TBM). Deep elevation of the road is -106m below sea level. It is one of the most prestigious and unique transportation construction in Turkey’s history. It connects the Asian
33,5 km double line 250 km/hr high-speed railway between Yerköy - Sivas section of Ankara - Sivas Railway. Supervision includes 6 tunnels with total length 6 km, 9 viaducts with total length 2,1 km, 3 overpasses, 11 underpasses, 25 culverts. Soil Improvements, Engineering Structures, Material Approvals and Progress Payment Control,
Total length 45,5 km 2 x 2 roads of 3 different groups in earthquake zones of Kocaeli - Gölcük. Supervision includes 9 bridge junctions,7 hydraulic bridges (425,00 m), 5 overpass bridges (240,00 m), 7 underpass bridges (150,00 m), 123 box culverts (4.915,00 m), Soil Works, Engineering Structures, Sea and Creek
44,5 km long 2 x 3 motorway, 17,7 km 2 x 2 Connection Roads between Gölcük - Kemerhisar with a design speed of 100 km/hr. Supervision includes 12 underpass bridges, 5 overpass bridges, 255 box culverts, 4 toll collection facilities, 1 highway service facility. Soil Works, Engineering Structures, Sea and
34,4 km long 2 x 3 motorway, 6,1 km 2 x 2 Connection Roads, 2,6 km 2 x 1 Side Road between Gaziantep - Şanlıurfa with design speed of 100 km/hr. Supervision includes 1 viaduct in 360 m, 7 bridge junctions in 303m length, 19 underpass bridges in 426 m
43,26 km 2 x 2 roads in earthquake zones of Sakarya - Kocaeli - Düzce. Soil Works, Engineering Structures, Sea and Creek Fortifications, Bored Piles, Bridges, Tunnels, Sub-foundations, Plant-Mix Foundation and Bituminous Hot Mix. Project Management, Construction Supervision, Material Approvals and Progress Payment Control, Quality Control and Quality Assurance, Provisional
27,6 km long 2 x 2 highway between Bolaman - Perşembe with a design speed of 100 km/hr. Supervision includes 5 double tube tunnels (Longest tunnel “Nefise Akçelik Tunnel” NATM with 3,815 m length) with total length 9,314m. 66 bridges with a total length of 7,651 m. Soil Works, Engineering