[rob74]

Here that doesn't seem to be the case. If you look at the western approach to the bridge in StreetView (which is from 2019, the eastern part has imagery after the collapse), there is no weight limitation sign to be seen. As such, you would expect the bridge to be able to carry the load in the worst case scenario of both lanes being filled to capacity with heavy vehicles, so failing because of one single truck and one or two cars is really bad...

[bell-cot]

Reaction: +1...but there is still an "on any public road or bridge" weight limit for trucks, buried somewhere in Norway's regulations for trucking & highways.

The stereotype would be that the law-abiding Norwegian truckers are always careful to keep their trucks below the legal weight limits...but stereotypes aren't always true.