The movement of vehicles on the street also results in resuspension of road dust. Emissions also occur as a result of tyre wear and brake lining wear. Although there is a lack of data, it is expected that most of these particles will be in the size range 3 to some 30µm. The chemical composition of these particles may also be very different from those derived from combustion. The road dust deposit available for resuspension comes from mechanical wear of, and dirt on, vehicles (incl. tyre and brake lining wear), debris from loads on vehicles, influx of soil material etc. In some parts of Europe, notably.
