Korsvoll was connected to the city center at Stortorvet and continued along the Vestbanen Line to Skillebekk.

[4] Because of fuel shortage during the Second World War, the trolleybus network was expanded in 1943 with line 21 from Skillebekk to Carl Berners plass converted.

[5] Oslo Sporveier decided at the end of the war that some of the tram lines with the least traffic should be closed.

At the time trams had both a motorman and a conductor while buses only had a driver, and Oslo Sporveier could cut operating costs through this.

[7] The tramway services to Korsvoll were terminated from 17 February 1949,[4] the same day the Rodeløkka Line was closed.