PM Modi dedicates Atal Tunnel to the nation Nitin Yadav 4 years ago The Prime Minister of India, Narendra Modi has dedicated Atal Tunnel to the nation, on 3rd October 2020.Atal Tunnel is the world’s longest highway tunnel above 10,000 feet from the Mean Sea Level (MSL).The tunnel has been named after former Indian Prime Minister Atal Bihari Vajpayee.