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Home Geography

Atal Tunnel

October 2, 2020
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Atal Tunnel
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The Prime Minister will inaugurate Atal Tunnel, the world’s longest underground highway, on 3 October in Himachal Pradesh. The strategically important all-weather Atal Tunnel will reduce the distance between Manali and Leh by 46 km and the travel time by five hours. 

More About Atal Tunnel

  • The 9.02 Km long tunnel will now connect Manali to Lahaul-Spiti valley throughout the year. Earlier the valley was cut off for about 6 months each year owing to heavy snowfall.
  • Atal Tunnel is built with ultra-modern specifications in the Pir Panjal range of Himalayas at an altitude of 3000 mtr (10,000 feet) from the Mean Sea Level (MSL).
  • It is a tunnel with a roadway of 8 mtr. It has an overhead clearance of 5.525 mtr.
  • It is 10.5-metre wide and has a 3.6 x 2.25 mtr fire proof emergency egress tunnel built into the main tunnel itself.
  • Atal Tunnel has been designed for traffic density of 3000 cars per day and 1500 trucks per day with a max speed of 80 km/hr.
  • It has state of the art electromechanical systems including semi transverse ventilation system, SCADA controlled firefighting, illumination and monitoring system.
  • Atal Tunnel has been completed in a span of 10 years
  • Atal Tunnel will be not only important from the strategic point of view but also give a boost to tourism in Lahaul-Spiti, creating employment opportunities.

Some of the Key Safety Features of Atal Tunnel:

  • Tunnel entry barriers at both portals.
  • Telephone connections at every 150 mtr for emergency communication.
  • Fire hydrant mechanisms at every 60 mtr
  • Auto incident detection system with CCTV cameras at every 250 mtr
  • Air quality monitoring at every 1 km.
  • Evacuation lighting/ exit signs at every 25 mtr.
  • Broadcasting system throughout the tunnel.
  • Fire rated dampers at every 50 mtr.
  • Cameras at every 60 mtr.

Atal Tunnel - Features and Strategic Significance | UPSC

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Source: Indian Express & Livemint
Tags: Prelims

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