Air quality measurements in the largest cities have shown that Norway have a challenge in fulfilling the EU-directives on local air quality. 200 000 people are influenced by local air pollution (dust) above the limit. The main reason being the use of metal studded winter tyres.
The most effective measure is to reduce the use by charging a fee on the use of studded tyres (NOK 30,- pr. day, NOK 400,- pr. mnth.) The goal is to reduce the number of cars with studded tyres to less than 20%.
In Oslo two main arterial roads have reduced speed limits (60 km/h) during winter. The reduction in small particles has been measured to 30-40%.