The Sinsen Line (Norwegian: Sinsenlinjen) is part of the Oslo Tramway on the east side of the city.

On 28 June 1938, the section from the branch with the Rodeløkka Line to Carl Berners plass was rebuilt to double track.

From 19 December, the line was extended along Trondheimsveien to Sinsen; this section was built with double track.

At the same time, Line 13 was changed to run from along the Sagene Ring via the city center to Sinsen.

[2] A new branch line to Rodeløkka was opened on 2 January 1955, because the tram gave lower operating costs than the bus.

The line ran from Carl Berners plass down Dælenengata and then used the block Dælenengata–Fagerheimgata–Marstrandgata–Københavngata–Dæenengata as a balloon loop.

From 25 June 1961, Line 17 was terminated and the section from Sinsen via Grefsen to Storo was taken out of service, although the tracks were kept to allow access to the depot.

In December 1978, the tram lines between Carl Berners plass and Rosenhoff were moved adjacent to the sidewalk.

[2] The line was among those proposed for closure in 2002 when the tram company attempted to save money by transferring the traffic to buses.

[4] Plans for a tramway to Tonsenhagen were launched in the 1950s, and in 1954 the city council zoned the necessary area for the route.

The line will the run from Årvoll to Tonsenhagen, with part of the route planned as a conventional street tram in mixed traffic to eliminate the need for expropriation on the east side of Årvollveien and impact on parks.

Trams are more energy efficient and give less global and local pollution than buses, increasing the positive impact.