In Sweden, as in other countries where studded tires are used in winter, the wear of road surfaces is an important source of ambient air quality through its contribution to particle concentrations in road and street environments. In environments with high traffic and poor ventilation, particles from road wear and resuspension contributes strongly to high levels during dry weather in early spring. The national goal for Fresh air is even more difficult than the environmental quality standard to reach in terms of particle concentrations.
Several issues have been recognized regarding particle emissions from road surfaces, primarily how the emission of PM10 is affected by various pavement parameters, such as construction, largest stone size and the stone material's resistance to wear. Similarly, alternatives to traditional asphalt pavements have attracted interest as potential elements of the solution to the particle problem. Since the early 2000s, a number of research projects commissioned by the Swedish Road Administration / Transport Administration to clarify these issues. This report is a compilation of the most important research results.