Bjørvikatunnel, Oslo, Norway

The story

The Bjørvikatunnel is a six-lane road tunnel in the center of Oslo. The tunnel runs under the bay of the Oslofjord (Bjørvika) in the city's inner harbor, and stretches from Bjørvika to the old town. Length: 1100m, of which 675m as a submerged tunnel with prefabricated sections. The tunnel ceiling is ten meters below the average water surface of the harbor.