The Kristiansund Mainland Connection is a road system consisting of the European route E39 highway and Norwegian National Road 70 that connects Kristiansund Municipality to the neighboring islands of Frei, Bergsøya, and Aspøya and then to the mainland of Norway. Krifast opened in 1992 and consists of 25 kilometres (16 mi) of road and 6 kilometres (3.7 mi) of bicycle paths. The three main structures are the undersea Freifjord Tunnel, the Gjemnessund Bridge, and the Bergsøysund Bridge. The Straumsund Bridge is also part of the network.