Prime Minister Narendra Modi, on March 9, inaugurated the world's longest twin-lane Sela tunnel, located at an elevation of 13,000 ft in Arunachal Pradesh. 

The tunnel, constructed at a cost of Rs 825 crore by the Border Roads Organisation, is strategically crucial as it is close to the Line of Actual Control.

• The Sela tunnel project consists of two tunnels, the first being a single-tube tunnel spanning 1,003 meters and the second measuring 1,595 meters, equipped with an emergency escape tube.
• This state-of-the-art tunnel also includes an 8.6 km-long approach and link roads.
• Designed to accommodate a traffic density of 3,000 cars and 2,000 trucks per day, with a maximum speed of 80 km per hour, the Sela tunnel addresses the challenge posed by the closure of the Balipara-Chariduar-Tawang road during heavy snowfall and landslides in the region.