I think we need to help Dan. Norway and Switzerland are in the #SchengenArea. Within the Schengen Area people can cross the borders without passport control. Try driving a lorry full of goods into Norway nd Switzerland and you go through customs checks.
This is Svinesund Customs Station at the main border crossing between Norway and Sweden. It can handle up to 2500 lorries a day. Clearing customs usually takes less than ten minutes, but may tale a couple of hours.