Nybrua

Nybrua bridge, which was built in 1827, lies in the district of Grünerløkka. It is crossed by Storgata which continues as Trondheimsveien on the eastern side of the river. At the same time, Storgata was lengthened and the lower part of Trondheimsveien was created.
As Oslo's major entrance point from the north, it became a part of Trondhjemske hovedvei which starts at Nybrua and goes to the city limits at Vestli.
Later, Vaterland Bridge, as well as Brugata and Lakkegata streets were also added to the route, to the north of the city. Nybrua was later extended and strengthened to take trams and modern motor traffic, although parts of the original structure can still be seen.

Wikipedia