Design and Construction of Infrastructure & Superstructure Works including Electrification under the İstanbul North Rail Crossing Project (INRAIL)

The Ministry of Transport and Infrastructure, Directorate General of Infrastructure Investments in Turkey from Europe region has released this tender for The Ministry of Transport and Infrastructure, Directorate General of Infrastructure Investments, Türkiye (hereinafter - teh Ministry), has received financing from the World Bank through Ministry of Treasury and Finance towards the cost of the INRAIL Project. The Project is being jointly financed by the Asian Infrastructure Investment Bank, the Asian Development Bank, the European Bank for Reconstruction and Development, the Islamic Development Bank, and the OPEC Fund for International Development. The Project will finance the construction of a 127 km greenfield railway line designed to bypass the Istanbul Metropolitan Area and establish a high-capacity overland link across the Istanbul Strait (Bosphorus). The line will be double-tracked, electrified, fully signalized, and mixed-use, capable of carrying both passengers and freight, with a maximum freight carrying capacity of 50 million tons per year. The proposed railway line will originate at Çayrova station on the Asian side and terminate at Çatalca station on the European side, crossing the Istanbul Strait by utilizing the existing track space allocated on the Yavuz Sultan Selim Bridge (YSS Bridge), also known as the Third Bosphorus Bridge, located at the northern end of the Istanbul Strait. The Ministry intends to apply a portion of the loan proceeds toward payments under the contract(s) for the "Design and Construction of Infrastructure and Superstructure Works, including Electrification" subdivided into four Lots as listed below. The scope of works covered under this procurement package as a whole (all four lots together) encompasses the design and construction including electrification of 122.3 km of double-track main line and 4.7 km of single-track connection lines, 5 twin-tube Tunnel Boring Machine (TBM) tunnels totaling 36.2 km, 22 double-track New Austrian Tunneling Method (NATM) tunnels totaling 23.3 km, 17 cut-and-cover tunnels totaling 3.7 km, two viaducts and 40 bridges totaling 22.1 km, Stations, etc. The scope of works covered under each lot is specified in the RFP document. The Telecommunication and Signalling Works are not included in this procurement package and will tendered separately. The Ministry now invites sealed Proposals from eligible Proposers for the Design and Construction of Infrastructure & Superstructure Works including Electrification subdivided into the four lots below. Proposers may submit Proposal for one or more lot(s): Lot 1 — Construction and Electrification Works for the Çayrova – Sabiha Gökçen Airport – Kurtdomu Corridor (28,49 km); Lot 2 — Construction and Electrification Works for the Kurtdomu – Alibahadr Corridor (25,76 km); Lot 3 — Construction and Electrification Works for the Alibahadr – YSS Bridge – Mithatpaa Corridor (32,14 km); Lot 4 — Construction and Electrification Works for the Mithatpaa – stanbul Airport – Çatalca Corridor (39,49 km). with tender notice no. 580920-2026 published on 24 Aug 2026. The tender is due to expire on 14 Oct 2026. This tender is sourced from TED Europa and is eligible for suppliers interested in Railway construction works. Interested bidders can obtain further information including complete bid documents or ways to participate by registering on Tender Impulse and referencing via Tender Impulse ID 14498294.