Atal Tunnel, connecting Manali to Leh, is the world’s longest highway tunnel above 10,000 feet. The estimated period for completion of this tunnel was less than 6 years but it was completed in 10 years: KP Purushothaman, Chief Engineer. #HimachalPradesh (15.9)

Atal Tunnel, connecting Manali to Leh, is the world's longest highway tunnel above 10,000 feet. The estimated period for completion of this tunnel was less than 6 years but it was completed in 10 years: KP Purushothaman, Chief Engineer. #HimachalPradesh (15.9) pic.twitter.com/crZDKbUfMU

— ANI (@ANI) September 15, 2020