Indians firat underwater Metro Train starts with Kolkata

India's first underwater metro to start in Kolkata soon. Piyush Goyal tweets




Commuters in the City of Joy will soon be able to travel through India’s first underwater metro. Today, Union Railway Minister Piyush Goyal took to Twitter to announce that the metro will be built under Kolkata’s Hooghly river.
“India’s first underwater train will soon start running under the Hooghly River in Kolkata. This train is an example of excellent engineering of India and an evidence of the progress of Indian railways,” reads Goyal’s tweet when translated from Hindi. “This service will ensure comfortable transportation for Kolkata residents, and will also make the country proud,” he further added.
Along with the caption, Goyal also shared a video that talks about the engineering associated with the construction of the underwater metro tunnels.


Shared just a few hours ago, the post has amassed more than over 6,000 ‘likes’ and 1,400 retweets. The video, accompanying the tweet, has also gathered about 28,000 views.
People showered all kinds of comments on the post. “You are doing marvelous job. Congratulations,” wrote a Twitter user. “Thanks a lot for a great progress of Indian railway,” tweeted another. “It’s amazing. India’s 1st water underground train,” rejoiced a third.
The project, which is about 16.6 km long, connects Howrah to the west and Salt Lake to the east. Out of the entire length, 10.8 km runs under the ground. It’s 502 meters of this 10.8 km that will run under the Hooghly river.










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(Provided by Euronews)
In pics: These are the world's 12 longest tunnels

For centuries, mountains and lakes posed massive problems for engineers. In both cases, they make travel nearly impossible and can make trips longer by days or months to bypass obstacles. However, with the invention of Marc Isambard Brunel and Thomas Cochrane's invention of the tunneling shield in the 19th century, that all began to change. Tunnels could go deeper - underwater through bedrock - allowing for quicker travel times. From particle accelerators to portals through Switzerland's famous Alps, today's tunnels built with advanced Tunnel Boring Machines make Brunel's original London Thames tunnel seem tiny by comparison. For the purposes of our roundup, we excluded most metro tunnels, which are often built by cut-and-cover methods instead of boring, and water tunnels, which humans can't travel through (easily, at least.) These are the world's 12 longest tunnels: 
(Provided by Business Insider)










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