The Mumbai Trans Harbour Link, India's longest sea bridge, will reduce the travell time two-and-a-half hours to around 22 minutes. From Sewri to Nhava Sheva, a 22 km long bridge will connect the island city to the mainland, bringing Mumbai closer to regions like Goa, Pune, and Nagpur.

The MTHL project will connect the Navi Mumbai area to south Mumbai. The 21.8 kilometre, six-lane MTHL project is being implemented by the MMRDA, a Maharashtra government body, with funding provided by the Japan International Cooperation body. When finished, it will be India's longest sea bridge and can accommodate 70,000 vehicles per day.

By building the Mumbai Trans Harbour Link (MTHL), which connects Mumbai and Navi Mumbai, the project aims to improve connectivity in the Mumbai Metropolitan Region while reducing traffic congestion and fostering economic growth.

This "longest sea bridge in the country" will feature the Open Road Tolling (ORT) system for the first time. It would take 15 to 20 minutes to get from Sewri in central Mumbai to Chirle in Navi Mumbai once the bridge is open for traffic. 

Eknath Shinde, the chief minister of Maharashtra, had earlier this year stated that the Open Tolling System will eliminate the need for motorists to stop on the bridge to pay the toll. According to representatives of the Mumbai Metropolitan Region Development Authority (MMRDA), this technique is currently in use in Singapore.

In package 2 of the Mumbai Trans-Harbour Link (MTHL), MMRDA successfully launched the first longest Orthotropic Steel Deck (OSD) in January of this year. 

In the about 22 km long Trans-Harbour link between Mumbai and Navi Mumbai, the first longest OSD of package-2 is 180 metres long and weighs 2300 metric tonnes.

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