The Mumbai Trans Harbour Link, joining Mumbai with the satellite city of Navi Mumbai, will be a six-lane highway with two emergency exit lanes, spanning a full length of 21.8km. The new bridge will play a crucial role in future growth in India, providing access to new jobs and housing for hundreds of thousands of people in fast-growing Navi Mumbai.

Consultant Cowi will carry out detailed design for package one, working for joint venture contractor Larsen & Toubro and IHI, while Ramboll will provide detailed design and technical support to joint venture Tata Projects-Daewoo.

Cowi provided the tender design for a contractor joint venture consisting of Larsen & Toubro from India and IHI from Japan. In 2017 this joint venture was awarded the design-build contract for package 1, which with a length of more than 10km is the longest of the three packages for the crossing. Cowi has now signed the contract for the detailed design of this package, which consists of the Sewri interchange and concrete and steel marine viaducts.

Ramboll will provide detailed design services and technical support for the Indian/South Korean joint venture Tata Projects-Daewoo. The contract includes geotechnical studies, foundation, column and superstructure design as well as the supervision of the building site.

The total budget for the project is estimated to be US$2.2 billion. Construction will begin in the middle of this year with completion by the end of 2022. It is estimated that in the first year of operation the bridge will carry some 62,000 passenger car units daily, which will increase to around 200,000 in the 30 years of operation assuming Navi Mumbai International Airport opens in this time.