The line has 27 stations, 26 of which are underground and it will enter service in phases from 2020.

MMR says that the line will operate with drivers for a year, before phasing them out once the safety of the line has been established.

Packages for traction systems, power supply, tunnel ventilation, signalling, train control, platform screen doors and telecommunication systems are still up for tender, with Siemens, Alstom and Bombardier among those in the running for the various packages. MMR is expected to complete the bidding process and select winners by May.