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% 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% of the works must be carried out by Iranian subcontractors.

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