The Mumbai Trans Harbour Link, also known as the Sewri–Nhava Sheva Trans Harbour Link, is an under-construction 21.8 km (13.5 mi) 6-lane access-controlled expressway grade road bridge, which will connect Mumbai with Navi Mumbai, its satellite city. When completed, it would be the longest sea bridge in India. The bridge will begin in Sewri, South Mumbai, will cross Thane Creek north of Elephanta Island, and will terminate at Chirle near Nhava Sheva. The road will be linked to the Mumbai–Pune Expressway in the east and to the under-construction Coastal Road in the west. The 6-lane highway will be 27 meters in width, in addition to two emergency exit lanes, edge strip, and a crash barrier. The project is estimated to cost a total of ₹17,843 crore (US$2.2 billion). The Mumbai Metropolitan Region Development Authority (MMRDA) awarded contracts for the project in November 2017, construction began in April 2018, and was scheduled to complete within 4.5 years. Construction was delayed by around 8 months due to the COVID-19 pandemic, and is currently expected to complete by December 2023. The MMRDA estimates that 70,000 vehicles will use the bridge daily after it opens.
