Mumbai will receive the nation’s longest subterranean road after the country’s first underwater tunnel

India’s first underwater tunnel, the Coastal Road tunnel was built using a 12-meter diameter tunnel boring machine (TBM) that was brought in from China during the epidemic. During construction, the two-arm, south- and north-bound tunnel set records, however Covid caused delays in the process.

Mumbai Road Tunnel
The TBM is presently disassembled and awaiting its next deployment, which is to build a tunnel that will link Orange Gate on Freeway to the Marine Drive end of Coastal Road.The country’s longest subterranean route within a city will be the more than 9 km long tunnel.
It will have twin tube construction with viaducts and contemporary safety features, much as the Coastal Road tunnel.