The Drammen Line (Norwegian: Drammenbanen) is a 52.86-kilometre (32.85 mi) railway line between Oslo and Drammen, Norway, which was opened on 7 October 1872. It serves all trains west of Oslo Central Station and is owned by the Norwegian National Rail Administration.The line opened as a 1,067 mm (3 ft 6 in) narrow gauge railway, and rebuilt to standard gauge between 1913 and 1922 . The line was electrified in 1922, as the first line on the national network to be electrified.