underwater triple tunnels in Assam
Railways together with the Union transport ministry and Border Road Organization (BRO) have decided to construct the country's first underwater road-cum-rail tunnels across Brahmaputra River in Assam at an investment of ₹7,000 crore. The project will consist of three parallel tunnels, one for the road and another for rail and the third one for emergency uses. The tunnels will be of 9.8 km each and this will be the first project where integrated tunnel construction will be undertaken. These tunnels will be inter-connected with cross passage for evacuation in case of any crisis and can also be used for both civilian and strategic purposes. The multi-modal transportation system aims to integrate the rail and highway network through the Jamurihat-Silghat axis towards North Assam, Tawang and the rest of Arunachal Pradesh. The tunnel will take off from about 9 km upstream of the existing Kaliabomara (Tezpur) road bridge and will connect Jakhlabandha railway station on the south bank and at Dhaliabil railway station on the north bank of Brahmaputra. The tunnels will be constructed using tunnel boring machines and are likely to take two to two-and-a-half years to complete. This will reduce travel time between Assam and Arunachal Pradesh as currently there are five bridges across the Brahmaputra for travelling purposes to these states.
The Mumbai Metropolitan Region Development Authority (MMRDA) is contemplating to construct a tunnel to bypass busy pockets of GPO and CSMT junctions and the Crawford market.In this connection, the nodal agency has invited bids to finalise a consultant to conduct

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To unclog Worli Naka (junction) in South Mumbai and increase footfall at Nehru Science Centre, Nehru Centre Art Gallery and Nehru Planetarium

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