According to the tender notice, most of the line will run at grade with 12 bridges and a 3.4km underground section.

The winning bidder will secure 85 per cent of the financing required for the project through foreign banks and financial institutions, with Iran’s Ministry of Economic Affairs and the Central Bank of the Islamic Republic of Iran providing any necessary approvals or guarantees. The tender specifies that at least 51 per cent of the works must be carried out by Iranian subcontractors.

NTDC said prequalification documents would be made available to prospective bidders between 26 April and 3 May. The deadline for prequalification is 21 June.