Atal Tunnel is a highway tunnel built under the Rohtang Pass in the eastern Pir Panjal range of the Himalayas on the Leh-Manali Highway in Himachal Pradesh, India.
Key Features: The tunnel reduces the distance between Manali and Keylong by about 46 kilometers, reducing travel time by around 4 to 5 hours. It's the world's longest highway tunnel above 10,000 feet (3,048 meters).
Construction: The tunnel was built using the New Austrian Tunneling Method (NATM). Construction faced significant challenges due to the difficult terrain and harsh weather conditions.
Purpose: The primary purpose of the tunnel is to provide all-weather connectivity to the Lahaul and Spiti valley, which used to be cut off from the rest of India for about six months every year due to heavy snowfall at the https://www.wikiwhat.page/kavramlar/Rohtang%20Pass. It also boosts tourism and economic activities in the region.
Dimensions: The tunnel is 9.02 kilometers long. It is a single-tube, two-lane tunnel.
Inauguration: The tunnel was inaugurated by Prime Minister Narendra Modi on October 3, 2020.
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