The viaTOLL system is obligatory for all motor vehicles and combination of vehicles with a maximum permissible weight of over 3.5 tonnes and for buses regardless of their maximum permissible weight. According to the Act of 7 November 2008 on amending the Act on public roads and certain other acts, electronic toll collection applies in Poland on toll motorways, expressways and selected national roads. All viaTOLL system incomes will be forwarded to the National Road Fund. They will be spent on further investments in the development of the road network in Poland and the modernization of the existing road infrastructure.
The use of the viaTOLL system is obligatory for the drivers of tractors, trucks, buses and:
*Car and trailer with a total combined maximum permissible weight of over 3.5 tonnes
*Minibus with fewer than 9 seats and a trailer with a maximum permissible weight of over 3.5 tonnes
More info: http://www.viatoll.pl/en/heavy-vehicles/viatoll-system