The Gotthard Base Tunnel is an engineering marvel, holding the title as the world's longest and deepest railway tunnel - but it's not the fastest to travel through ...

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

Construction on the Howard Street Tunnel has begun. It marks the first time the tunnel, which opened in the late 1800s, has ...

The coastal rail route is part of the 351-mile Los Angeles-San Diego-San Luis Obispo rail corridor and is San Diego’s only ...

The San Fernando Railroad Tunnel was opened in 1876 to ... the region built specifically for vehicle traffic. The 435-foot-long tunnel was removed or “daylighted” in 1938.

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

For many, train journeys are the most efficient and relaxing way to reach their destination, thanks in part to the tunnels that cut through hills and mountains. While there are over a thousand rail ...