Tunnel

2013 saw the start of a major construction project – the Ryfylke tunnel, which opened to traffic just in time for the start of the new decade. This is the longest and deepest underground road tunnel in the world – 292 m below sea level – and it forms part of what is known as the Ryfast project.

The Tingstad Tunnel under the Göta älv river consists of two sections, each with three lanes, connecting Hisingen with mainland Gothenburg. The traffic is heavy, with up to 3,500 vehicles an hour in each direction.

The asphalt on the M25 Dartford crossing's western tunnel under the trucks is pounded 24 hours a day, seven days a week, and the carriageway's 11 year old surfacing had become heavily wheel tracked and potholed. Resurfacing was required.