Tunnelling work for the ambitious underpass linking Orange Gate and Marine Drive project is to begin next month, according to Mumbai Metropolitan Region Development Authority (MMRDA) sources. “As of today, the project has achieved physical progress of 13.5 per cent and financial progress of 10.37 per cent. 

The contractor has mobilised a TBM [Tunnel Boring Machine] at the site, and the TBM lowering and assembly work is in progress at the launching shaft. Tunnelling is expected to commence from December 2025,” an MMRDA official said. The twin tunnels will provide a traffic-free route between Orange Gate on P D’Mello Road and Marine Drive, enhancing connectivity and reducing travel times.