Tunnels are being used increasingly in India, especially to cross borders in mountainous regions of the country.
“Precious experience in the Himalayan region has been gained following large numbers of tunnel projects,” said M.M. Madan, chairman, tunneling group, of the Association of Chambers of Commerce. In one instance, the 9-km Atal Tunnel was constructed using drill and blast New Austria Tunneling Method in Rohtang, at an altitude of 3000 m. (10,000 ft).