Granfoss Tunnel

The two tunnels are 2.1 kilometers (1.3 mi) long and they are part of the Granfoss Line, a 2.9-kilometer (1.8 mi) stretch of motorway which was opened in 1992 connecting Ring 3 with the European route E18.

The name comes from the Granfossen waterfall on the Lysakerelva river, which passes nearby.

When the two tunnels with four lanes were opened for traffic, a bottleneck of Oslo's road system which had lingered for several decades was finally dissolved.

The tunnels were financed by Oslo Package 1.

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The northern entrance of the southern tunnel, March 2009.
The southern entrance of the northern tunnel, April 2009.