India's first bullet train route to have 21 kms under sea tunnel

India's first bullet train, on the Mumbai-Ahmedabad route, will feature a 21 km underwater tunnel under the Arabian Sea, part of the Mumbai-Ahmedabad High-Speed Rail Corridor. The tunnel will enable the bullet train to reach speeds of 320 km/h, with construction adhering to strict environmental standards to protect ecologically sensitive areas like Thane Creek.