Mumbai, June 13 -- Tunnel Hoods are being installed at mountain tunnel portals on the Mumbai-Ahmedabad Bullet Train Project. This is the first time such tunnel hood technology has been designed and implemented for railway tunnels in Bharat, according to the National High Speed Rail Corporation Limited (NHSRCL)

The Mumbai-Ahmedabad Bullet Train corridor traverses challenging terrain and includes seven mountain tunnels in Maharashtra and one mountain tunnel in Gujarat. Tunnel hoods are being provided at both ends of these mountain tunnels.

Explaining the need for the system, the release stated that when a high-speed train enters a tunnel, it pushes a large volume of air ahead of it, similar to a piston moving inside a cylinder. This sudde...