New York City's Second Avenue subway line was the greatest project the city never built -- until 2007, almost 90 years after its initial proposal, when the city finally broke ground on it. When completed, the $4.45 billion project will provide New Yorkers with two more miles of commutable subway tunnels on Manhattan's East Side.
Photos released on the MTA's Flickr page show a few pieces of the new route in-progress--and just how hard it is to dig a miles-long tunnel under a densely-populated island city.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.


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One the pictures are really interesting to see. In my youth I was a spelunker and I like going into caves and yes these are manmade caves, but still look fun to explore.
Oh, Shaunacy Ferro, if the comments do not go the way you prefer, will you block all comments on this article? Will this be a ongoing occurrence for future articles? I am curious?
At a cost of now 4.2 Billion Dollars they are building something similar to this in Amsterdam called the North-South metro line. The route is 6 miles long, of which a total of 4 miles will be underground (some of it under a massive river). It features 7 new stations and will thus connect the northern parts of Amsterdam to the Southern Parts by metro.
subway make big contribution to ous city construction,it will be put off without the spin welding machine,to own it right now...
Just got back from a trip to New York. Used the subway a few times. If they can afford to spend $2.25 billion per mile to build a new line, maybe they can spend a few thousand per mile to clean the old one. The New York subway must be the most filthy on earth. It's actually dirtier than Mumbai's, which is a sewer with trains.