Design and Build procurement for infrastructure, superstructure and electrification works for the Istanbul North Rail Crossing Project (INRAIL).

The procurement covers the construction of approximately 127 km of new railway between Çayırova on the Asian side of Istanbul and Çatalca on the European side, providing a new rail connection across the Bosphorus via the Yavuz Sultan Selim Bridge.

The works are divided into four construction lots and include major civil engineering works such as tunnels, viaducts, earthworks and associated structures, together with railway track, superstructure and electrification works.

The new corridor is intended for mixed passenger and freight operations with a design speed of up to 160 km/h. The procurement is being undertaken by the Directorate General of Infrastructure Investments (AYGM) under an internationally financed programme.

Tender Reference: AYGM-INRAIL-2025-YAP 01/1-2-3-4
Submission Deadline: 14 October 2026