description Oslofjord Tunnel Overview
The Oslofjord Tunnel is a subsea road tunnel carrying Norwegian National Road 23 beneath the Oslofjord between the Drøbak area and Hurum. Opened in 2000, it is approximately 7.2 kilometers long and forms an important fixed road connection between the eastern and western sides of the fjord. The tunnel descends well below sea level and provides an alternative to routes that pass through or around Oslo.
help Oslofjord Tunnel FAQ
Where is the Oslofjord Tunnel?
The tunnel runs beneath the Oslofjord between Måna in the Drøbak area and Verpen on Hurumlandet. It is now part of European route E134, although the connection was historically associated with National Road 23. [Norwegian Public Roads Administration](https://www.vegvesen.no/vegprosjekter/prosjekt/oslofjordforbindelsen/)
How long and how deep is the Oslofjord Tunnel?
It is commonly described as about 7.2 kilometers long, while the Norwegian Public Roads Administration lists the tunnel at 7,300 meters. The route reaches about 134 meters below sea level. [Norwegian Public Roads Administration](https://www.vegvesen.no/vegprosjekter/prosjekt/oslofjordforbindelsen/)
When did the Oslofjord Tunnel open?
The first stage of the Oslofjord connection opened in 2000. It formed part of the road link from Bjørnstad in Røyken to Vassum in Frogn. [Norwegian Public Roads Administration](https://www.vegvesen.no/vegprosjekter/prosjekt/oslofjordforbindelsen/)
Does the Oslofjord Tunnel still have a toll?
The toll station was removed in 2016, so the tunnel became free to use. About 3,500 vehicles per day passed through it when it opened in 2000. [Norwegian Public Roads Administration FAQ](https://www.vegvesen.no/vegprosjekter/prosjekt/oslofjordforbindelsen/ofte-stilte-sporsmal/dagens-oslofjordforbindelse/)
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