There are many reasons why the toll rate signs in Oslo disappeared. First of all, the new toll system consists of many different rates based on rush hours, fuel type and engine type. This means that signs would have to contain a lot of information, which can be difficult to process in passing, thus presenting a danger to road users. Another reason is that in built-up areas such as Oslo there is limited space for information boards of the size that this would require.
Not disappearing everywhere
The toll rate signs will not disappear in all of Norway, however. Toll rate signs will still be used on roads outside and between cities, and on main roads through simple toll rings where the rates are the same at all toll collection points.
The Norwegian Public Roads Administration (NPRA) has developed new guidelines for the signage of automatic toll collection
points. These came into force after public consultation and comment as well as a trial and testing phase.
The reason for the adoption of new rules for toll rate signs is that urban areas often have a complex traffic situation, including many signs for road users to process. With time-differentiated toll rates (rush-hour rates) and rates that vary with vehicle category and fuel type, there would be too much information on these signs for road users to process in passing.
Restrictions on toll rate signs in cities
It was therefore decided to limit the use of toll rate signs in urban areas. The NPRA is authorised to define technical rules and guidelines for the use, design, size and placement of public traffic signs, cf. Section 35 of the Norwegian Traffic Sign Regulations. These guidelines apply to all automatic toll collection points in Norway.