India, June 30 -- India's first eight-lane highway tunnel, constructed below a tiger reserve in Rajasthan's Kota district on the Delhi-Mumbai Expressway, is set to open for all vehicular traffic in August, with safety trials currently underway.

The 4.9-kilometre twin-tube tunnel, located beneath the Mukundra Hills Tiger Reserve (MHTR) in Rajasthan on the Delhi-Vadodara section of the expressway, has already been opened for cars and emergency vehicles following the completion of safety inspections. The authorities will only allow heavy vehicles and all other traffic after completing additional evaluations of safety systems and mobile network connectivity within the tunnel.

"The eight-lane highway tunnel on the Delhi-Mumbai Expressway ben...