The OBU display provides information on the applicable toll tariff, the charged distance in kilometres, the daily toll consumption and the vehicle’s licence plate.
Sometimes your OBU might show tolling on non-tolled roads, private ground or when driving abroad for a short period. This is due to the time it takes to display the latest information. This in no way prevents the toll from being calculated accurately. Accurate information can always be found on the RUP, including in the detailed billing documents.