Eight photos: Inside the world’s longest undersea road tunnel 8 photos Already under construction, Rogfast will be the world’s longest and deepest undersea road tunnel, spanning 27 kilometers (17 miles). Click on the photo to see more.
Skanska
Eight photos: Inside the world’s longest undersea road tunnel Already under construction, Rogfast will be the world’s longest and deepest undersea road tunnel, spanning 27 kilometers (17 miles). Click on the photo to see more.
Skanska
The tunnel will have two separate tubes, each with two traffic lanes, exclusively for road traffic. At its deepest it will be 392 meters (1,286 feet) below sea level.