Crews will bore 1.8 miles of twin tunnels and build three new stations in East Harlem under the $7.7B Second Avenue Subway Phase 2 expansion, supported by seven shafts and precast concrete liners.

The money train never stops. The MTA awarded a nearly $2 billion contract on Monday for the long-promised Second Avenue Subway’s next phase — a colossal payout that transit officials claimed was a ...

Firefighters are moving around the collapse site of the 5-2 section at the Shinansan Line underground tunnel construction site in Gwangmyeong, Gyeonggi, on April 14. [NEWS1] A man in his 50s who went ...

The engineering marvels that run through mountains, beneath rivers, and deep underground represent some of humanity’s most ambitious infrastructure projects. Contrary to showing only advanced ...

Decades of empty promises are no more. The MTA board on Monday approved a contract to begin major construction on the Second Avenue Subway extension into East Harlem. The nearly $2 billion deal covers ...

In 1974, OKC Mayor Patience Latting described the city's underground Metro Concourse network as "the largest pedestrian tunnel system in the world." ...