Fjellinjen AS is a toll company owned by the City of Oslo (60%) and Viken County Municipality (40%).

[4] The company was created on 13 February 1986 to finance the 1,800-metre-long (5,900 ft) Festning Tunnel on E18 through Oslo, completed in 1990.

On 8 June 1988, the Norwegian Parliament granted permission for further collection through Oslo Package 1, a program to expand parts of the highways in the capital.

Following this, Akershus County Municipality bought 40% of the company in 1990. Financing was partially to come through a toll ring around the city.

From 1 January 2008 to the latest 31 December 2012, the ring and Fjellinjen will finance the Bjørvika Tunnel as well.