page_title: Røa Line
section_title: Bærum extensions
hierarchical_section_title: Røa Line / History / Bærum extensions
caption_attribution_description: English: Røa Line bridge over dam Grinidammen. Grini Mill (Grini mølle) in the background.
context_page_description: The Røa Line is a rapid transit line of the Oslo Metro, Norway, which runs from Majorstuen in Oslo to Østerås in Bærum. It serves neighborhoods such as Smestad, Hovseter, Huseby and Røa in northwestern Oslo, and Grini, Øvrevoll and Østerås in northeastern Bærum. The line is served by Line 2 of the metro, which connects to the city center via the Common Tunnel and onwards along the Furuset Line. The lowest part of the Røa Line, consisting of two stations, is shared with the Kolsås Line, and thus also served by Line 2 of the metro. The Røa Line is owned by Kollektivtransportproduksjon, and operated by Oslo T-banedrift on contract with the public transport agency Ruter.
  The first part of the line, originally a light rail, was from Majorstuen to Smestad, and opened in 1912. It was built as a cooperation between the Municipality of Aker and the company Holmenkolbanen, and connected to the Holmenkoll Line's terminus. In 1928, the line received a connection to the city center when the first part of the Common Tunnel was completed. In 1935, the first extension of the Røa Line proper was made, when the line was extended to Røa. In 1942, the Kolsås Line became a branch.
context_section_description: Proposals to extend the line into the neighboring municipality of Bærum had first been launched in 1919. In 1941, construction of an extension to Grini started. The main problem was getting building materials for a bridge to cross Grinidammen, and a local disagreement about where the station at Røa was to be located. The 0.9-kilometer (1 mi) extension was opened on 22 December 1948, after Røa Station had been moved, and the line put in a short tunnel under the center of Røa.
  The 1.5-kilometer (0.93 mi) extension via Eiksmarka to Lijordet opened on 3 December 1951. Lijordet was intended to be named Sørbråten, but there was already a station with that name on the Norwegian State Railways' network, and two stations with the same name were not permitted. In 1959, a block signaling system was installed between Røa and Makrellbekken.
  During the early 1970s, Bærum Municipality wanted to extend the line onwards to Hosle, and were willing to pay the construction costs. Holmenkolbanen also wanted the municipality to pay for new trams, but the municipality was not willing to do this. The line was therefore only extended to Østerås, which could be reached using the existing fleet. The 0.6-kilometer (0.37 mi) extension was opened in 1972. Since 1978, Holmenkolbanen has had sufficient trams to operate an extension, but since then the municipality has not been interested in extending the line further.
caption: The bridge over Grinidammen.
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