The line was opened on 21 August 1995 to serve the newly redeveloped areas with a high concentration of jobs.

The first line at Vika was built by Kristiania Sporveisselskab, and opened as a horsecar route from Oslo West Station to Stortorvet on 10 October 1875.

[5] In October, an agreement was reached where the 48 million kr to build the line would be split evenly between the municipality, the state and the private real estate developers: Aker Eiendom, Olav Thon Eiendomsselskap and Berdal Strømme.

[3] By 1990, municipal-owned Oslo Sporveier, the then owner and operator of the tramway, stated that the project would be profitable, and contribute NOK 4.9 million per year to the company.

[7] One of the suggestions for the private financing of the project, was for the companies to create a kommandittselskap, and purchase two trams from the city for NOK 8 million each.

Had the light rail solution not been discarded in favor of making the ring part of the Oslo T-bane, the Vika trams would, after reaching Majorstuen, have continued onwards towards Rikshospitalet, that opened in 1999, and Nydalen.

The right-winged opposition parties opposed the suggestion, arguing that financing was not yet finalized, and that they wanted to have The City Hall Square completely free of all traffic, not just automobiles.

[15] With the redevelopment of the Bjørvika and Vippetangen areas, located east of The City Hall Square, three other segments of tramway have been proposed to be built along the fjord edge, and could connect to the Vika Line in the future.

It intercepts the Skøyen Line at Wessels plass to the east, where the trams continue to the city center.

At The City Hall Square, there is transfer to the ferry quay for Oslo Fergene, that operates route 91 on contract with Ruter to Bygdøy.

[22] Also located in the area is the former Western Railway Station, that today's hosts the Nobel Peace Center.