Çaycuma-Bartın Junc.-Hisarönü-Zonguldak Road 6 Tunnels, Engineering Structures and Route Application Projects Preparation, Survey, Project Consultancy Service Procurement Work More info »
Various Tunnels (Zonguldak City Crossing Mithat Paşa Tunnel), (İzmir Manisa Road Sabuncu Beli Tunnel), (İkizdere İspir Road Ovit Mountain Tunnel) Survey and Project Design Consulting Services Procurement Work More info »
