Today, L.A. Metro’s subway tunnels connect some of the city’s most densely populated neighborhoods. There are many other ...

The San Diego area planning agency seeking to develop an inland alternative to the Surf Line rail route along the Del Mar ...

The 11-mile passage will be the world's longest road and rail tunnel, as well as the planet's longest immersed tunnel when it ...

Brown said DEA and Homeland Security Investigations (HSI) personnel must intensify their investigations into underground tunnels to discover “cover-ups” of the tunnels’ US exits. “Cover-ups” are ...

PITTSBURGH (KDKA) — Pittsburgh Regional Transit will close the Mount Washington Transit Tunnel for approximately eight months ...

Complicating the Gateway project are the unknowns underground, from an 1800s-era bulkhead supporting Manhattan to a former ...

Explore one of London’s best kept secrets on a walking tour of the historic Mail Rail Tunnels. The Postal Museum in Phoenix ...

The city Department of Environmental Protection plans a major upgrade to the area's sewer system, which discharges sewage ...

Complicating the Gateway project are the unknowns underground, from an 1800s-era bulkhead supporting Manhattan to a former landfill on the path.

The Suifenhe tunnel, just above North Korea, is set to replace three 120-year-old railway tunnels on the Russia-China border ...

PRT announced Monday that the tunnel will close on Feb. 23 so crews can perform “critical infrastructure upgrades.” ...

An impressive new tunnel project, costing £6.4billion is being constructed for both rail and road transport to connect ...