A study by Finland’s Ministry of Transport and Communications shows that congestion charges would be a better way to make public transport more attractive to motorists than costly traffic investments. In the most efficient scenario, the share of public transport of all trips made in the Helsinki metropolitan area would rise by about seven percentage points. According to the Helsinki Metropolitan Area Council YTV, no other single measure has raised the popularity of public transport by as much.

The Ministry of Transport and Communications has examined the effects of three different types of congestion charges on traffic in the Helsinki metropolitan area. A congestion charge that is based on the number of kilometres driven would raise the popularity of public transport the most. Congestion charges based on a toll-type fee would increase the share of public transport by three to five percentage points.

An increase in the popularity of public transport would make it necessary to allocate more money for it. According to the Ministry, the public transport services of the Helsinki metropolitan area would need an additional 20-40 million euros a year. The congestion charges would bring about 150-260 million euros a year.