why did anybody not know about the long turnnel
Answers
Answer:
Gotthard Base Tunnel
Explanation:
The Gotthard Base Tunnel is the world's longest and deepest tunnel. It runs under the Swiss alps between the towns of Erstfeld in the north and Bodio in the south. The tunnel is 57 km long and reaches a depth of 2,300 meters.
Answer:Atal Tunnel, the horseshoe shaped single-tube, double-lane tunnel has many firsts
Prime Minister Narendra Modi is expected to inaugurate the tunnel by the end of September this year
The construction of the Atal Tunnel connecting Manali with Leh, which is the world's longest highway tunnel above 10,000 feet, has been completed in a span of 10 years. The horseshoe shaped single-tube, double-lane tunnel has many firsts. It is also the country's first tunnel to have an escape tunnel within the main tunnel because of the topography. This is also the first tunnel to deploy the Rowa flyer technology, which allows engineers to work at inverted levels.