Atal Tunnel to remain closed for one hour today for maintenance work ANI | Updated: Dec 26, 2020 08:53 IST Manali (Himachal Pradesh) [India], December 26 (ANI): The Atal Tunnel in Rohtang will remain closed today from 11 am to 12 pm for the maintenance work, said the Lahaul Spiti Police. The South Portal (SP) of Atal Tunnel is located at a distance of 25 km from Manali at an altitude of 3,060 metres, while the North Portal (NP) of the tunnel is located near village Teling, Sissu, in Lahaul Valley at an altitude of 3,071 metres. The 9.02 km long tunnel, the longest highway tunnel in the world connects Manali to Lahaul-Spiti valley throughout the year.