The world’s longest and deepest undersea road tunnel is being built in Norway, intended to cut travel time between major cities and become part of a ferry-free highway along its western coast.

Tunnels are used to carry traffic through some of the most extreme terrain on the planet and they help ease journeys with reduced travel time. While most tunnels offer a short underground burst of ...

OSLO, Norway (Reuters) -- Norway's King Harald opened the world's longest road tunnel Monday just hours after a tiny fire forced about 50 people to evacuate a bus in the heart of the 15.3-mile ...