Sariyer - Cayirbasi Motorway Tunnel
- Client : Istanbul Metropolitian Municipality
- Location : Istanbul / TURKEY
- Scope of Work : Construction of 2x2100 m. motorway tunnel (NATM) with two lanes between Sarıyer and Çayırbaşı.
- Start Date : 03.12.2007
- Finish Date : 03.09.2011
