Bomringen i Oslo/Bærum
Oslo is surrounded by two toll rings, the Bærum ring and the Oslo ring. You only pay when enter the city centre. The automatic toll stations are located on entry roads into Oslo. As the barrier system is automatic, you simply drive through.
EasyGo in Norway
AutoPass is the Norwegian system for payment on roads, ferries, bridges, etc. If you have an OBE from a Norwegian toll service provider, BroBizz or the Øresund Bridge, you are automatically in EasyGo and will always get the same and best price when you pass a payment system in Norway.
You do not need to do anything to get the AutoPass prices EasyGo as long as you place your OBE in the windscreen.
You can find the prices of this payment facility here.
Note that you should always look for the price of an AutoPass agreement, unless the EasyGo price is shown.
The toll stations are automatic. There is no need to stop when driving through.