Toll stations outside Ring 2 in Oslo with “arteries” going out to Grefsen and Trosterud – payment in both directions. (A total of 38 toll stations).
Oslo’s original toll ring – payment in both directions. (A total of 22 toll stations).
Toll stations near the municipal boundary between Oslo and Follo / Romerike / Bærum – tolls are only payable for traffic heading towards Oslo. (A total of 23 toll stations).
Source: The Norwegian Public Roads Administration