The Sinsen Interchange (Norwegian: Sinsenkrysset) is a heavily trafficked, multilevel road junction in Oslo, Norway.
The increase in traffic was greater than the capacity of the junction, and thus a bridge was constructed that redirected Trondheimsveien above the roundabout.
Further restructuring was done in 1992, when a local tramway line was redirected outside of the interchange, and in 1994, when Riksvei 150 was directed below the roundabout.
The Norwegian Public Roads Administration plans to connect the Løren Tunnel, a planned tunnel over National road 150, with the Sinsen interchange in late 2008.
The expression cropped up in revues during the 1960s, and is probably due to that Sinsen then was the end point for the main road leading into Oslo from the north.