İstanbul North Rail Crossing Project (INRAIL - P509952) - 9736-IFT-56767

Issued on: 21 July2026

1. The Ministry of Transport and Infrastructure, Directorate General of Infrastructure Investments, Türkiye, 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 Çayırova 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.

2. The Ministry of Transport and Infrastructure, Directorate General of Infrastructure Investments 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.

3. The Ministry of Transport and Infrastructure, Directorate General of Infrastructure Investments 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 Çayırova – Sabiha Gökçen Airport – Kurtdoğmuş Corridor (28,49 km)
• Lot 2 — Construction and Electrification Works for the Kurtdoğmuş – Alibahadır Corridor (25,76 km)
• Lot 3 — Construction and Electrification Works for the Alibahadır – YSS Bridge – Mithatpaşa Corridor (32,14 km)  
• Lot 4 — Construction and Electrification Works for the Mithatpaşa – İstanbul Airport – Çatalca Corridor (39,49 km)

4. The procurement will be conducted through international competitive procurement using Request for Proposals (RFP) as specified in the World Bank’s “Procurement Regulations for IPF Borrowers” September 2025 (“Procurement Regulations”), and is open to all eligible Proposers.

5. Interested eligible Proposers may obtain further information from

Serkan UÇAR,

Head  of Railways Construction Department -AYGM (General Directorate of Infrastructure Investments),

Telephone: +90 312 203 17 40  

Email: irfan.kurnaz@uab.gov.tr,

and inspect the RFP Document during office hours 0900 to 1700 hours (Turkiye time)  at the address given below. Read-only version of the RFP  document may also be viewed on the Employer’s website https://aygm.uab.gov.tr/ihaleler   

6. The RFP Document in English may be purchased by interested eligible Proposers upon the submission of a written application to the address below and upon payment of a nonrefundable fee of Turkish Lira 13,000 (thirteen thousand) to the Employer’s bank account indicated below. Prospective Proposers who have bank accounts in currencies other than Turkish Lira may request their bank to make the transfer of the fee in Turkish Lira.  The document will be sent by e-mail. Information of bank account that payment will be done is given below.

For remittance in Turkish Lira:
Account Name:  T.C. Ulaştırma ve Altyapı Bakanlığı – Merkez Saymanlık Müdürlüğü
Account No: TR67 0000 1001 0000 0350 1540 29
Bank Name: T.C. Merkez Bankası (Central Bank of the Republic of Türkiye)
Bank address: Ankara Şubesi (Ankara Branch), Ankara

The Employer shall transmit the RFP to the Proposers by email as a PDF attachment. Download links to the Employer's Requirements, Drawings, and any other large sections that form part of the RFP document shall be provided in the relevant sections of the RFP document and those sections can be downloaded by the Proposers. In case of any difficulty in downloading those sections, Proposers should send a written request to the Employer's email address specified below.

7. A single-stage, two envelope RFP process will be used, and the Proposal will consist of (i) the Technical Part, without any reference to prices; and (ii) the Financial  Part, as detailed in the RFP Document. The Technical and Financial Parts of the Proposals shall be submitted simultaneously in two separate sealed envelopes.

8. The Proposal, both the Technical Part and the Financial Part, must be delivered to the address below on or before 14.10.2026 – 14:30 (Ankara Time). Electronic Procurement will not be permitted. Late Proposals will be rejected. The Technical Part of the Proposals will be publicly opened in the presence of the Proposers’ designated representatives and anyone who chooses to attend at the address below on 14.10.2026 – 14:45 (Ankara Time).  The Financial Part shall remain unopened and will be held in safe custody of the Employer until the second public opening of the Financial Part, following the evaluation of the Technical Part of the Proposals.

9. Proposers may submit Proposal for one or  more Lots/contracts, as further defined in the RFP Document.

10. All Proposals must be accompanied by:

   I. Proposal Security in the amount for each lot as specified in the table below. The proposal security should be enclosed in the envelope containing the Technical Part of the Proposal. In accordance with the provisions of the Request for Proposals.

Description            Proposal Security
LOT 1                       USD  5,000,000 
LOT 2                      USD  2,800,000
LOT 3                      USD  2,800,000
LOT 4                      USD  5,000,000 

  II.  Local Labour Method Statement

11. Attention is drawn to the Procurement Regulations requiring the Borrower to disclose information on the successful Proposer’s beneficial ownership, as part of the Contract Award Notice, using the Beneficial Ownership Disclosure Form as included in the RFP document.”

12. The address (es) referred to above is:

Ministry of Transport and Infrastructure Directorate General of Infrastructure Investments – Department of Railway Construction

Name: Serkan UÇAR, Head of Railways Construction Department

Address: Hakkı Turayliç Caddesi No:5, Emek 06500, Ankara, Türkiye, Floor: 6 Room:616
Telephone: +90 312 203 17 40

Email: irfan.kurnaz@uab.gov.tr

Web Address: https://aygm.uab.gov.tr