Ahead of the upgrade of the Holmenkollen Line to metro standard, there was a discussion if it should instead be connected to Oslo Tramway. In that case, the line would have had to branch off at Frøen and continue to Majorstuen, where it would connect to the Briskeby Line. This was rejected, and instead the line was renovated as a metro line. Frøen closed in 2009 and opened again on 6 December 2010. There was not time for an outright upgrade to the stations, so Frøen remains with its pre-upgrade platforms and amenities. Service The station is served by Line 1 of the Oslo Metro. During regular hours, it operates at a 15-minute headway. Travel time to Stortinget is six minutes. Operations are carried out by Sporveien T-banen on contract with Ruter, the public transport authority in Oslo and Akershus. The infrastructure itself is owned by Sporveien, a municipal company. Service is provided using MX3000 three-car trains. The station had an average 525 boarding passengers in 2008. Although mid-range for the Holmenkollen Line, this is low for the metro overall. Frøen is located in fare zone 1. Facilities Frøen is a rapid transit station situated on the Holmenkollen Line, from Stortinget in the city center. It is situated at an elevation of above mean sea level. The platforms are much shorter than the norm for the metro and only have space for two cars. They each feature a waiting shed and ticket machines. The platform on the platform towards the city center is the only platform of the entire metro network which lacks accessibility, as travelers much traverse a set of stairs. The station has a unique design as it serves both as an interchange between two lines and a station. The Sognsvann Line runs at the lowest elevation in two parallel tracks. The up-bound Holmenkollen Line track branches off rises steeply and then reaches its platform. Thereafter it passes over the Songsvann Line where it meets up with the down-bound Holmenkollen Line. It runs down and meets the Songsvann Line on the other side, after passing its platform. While the Songsvann Line still used Frøen, the station therefore had four platforms. Now only two remain in use. The unusual layout means that the platforms have a significant difference in elevation Future Ruter has announced that it intends to close Frøen Station. Both Frøen and Steinerud serve Diakonhjemmet Hospital. Neither