This 800-meter closure is expected to cause huge traffic disruptions. To mitigate these effects, several measures have been implemented, including the rerouting of key roads and reducing the overall number of vehicles in this area.

The primary reason for this extensive closure is the planned reconstruction and enhancement of the Hammersborg Tunnel and Vaterland Tunnel on Ring 1.
The Hammersborg Tunnel, which runs beneath the government quarter, will be lowered by up to eight meters as a safety measure.

Approximately 17,000 vehicles use this section of Ring 1 daily. The Norwegian Public Roads Administration (Statens vegvesen) estimates that 8,000 to 10,000 of these vehicles will reroute through the E18’s Operatunnelen. However, this alternative route will meet problems to accommodate the additional traffic load.

The closure of Ring 1  will cause a significant challenge for Oslo’s traffic system.
We recommend considering that driving E18 or E6 in west direction, through the other rings around Oslo will take much more time, which is important for freight forwarders and truck drivers when planning their routes.