E6, the main road through Norway from Oslo all the way up to Kirkenes. South of Oslo the road continues along the Swedish west coast to Trelleborg. In Germany it continues as route 96.
When I met my wife she lived in Berlin, but we both lived just a few hundred meter from E6.
In Trondheim E6 splits in two, one going through the center of the town, one passing in the outside: Omkjøringsveien, "The road leading you around". Most of the traffic on the road is local, especially close to Christmas.