Emissioner av slitage- och resuspensionspartiklar i väg- och gatumiljö: litteraturstudie


Particles from wear and resuspension in the road environment are difficult to handle in emission modelling for many reasons. Primary wear emissions are affected by a large number of factors related to material properties, traffic characteristics and temporal and spatial variations in the composition of the vehicle fleet. Estimations made from measurements in ambient air need source apportionment studies, while laboratory tests are made on pinpoint samples taken under non-realistic conditions.

Resuspension depends, apart from the addition of primary wear particles, also on the addition of particles from exhaust and the environment. Road surface characteristics and meteorology are important factors affecting the resuspension process.

This report summarises how some different models handle wear- and resuspension particles and provides an overview of factors affecting the emission of these particles as well as an overview of relevant emission factors. The models considered are the American AP-42, the Swedish Dispersion and the Norwegian VLuft.

The report concludes that it is important that data used for particle emissions from tyres and brakes are as up-to-date as possible, since the composition varies over time. Relatively good data are available and probably generalizable. The situation for pavement wear and resuspension is more complex. These particle sources depend on a large number of factors and are difficult to separate from each other. Model development should therefore focus on pavement wear and resuspension processes. For Swedish conditions the Dispersion model (SMHI), which has great development potential through e.g.  coupling to current maintenance models, is a suitable starting point.



Cost Benefit Analysis (CBA) workshop in Stockholm

An open seminar and workshop in Stockholm will be held on 25-26 April 2018. The workshop deals with the use of CBA as a basis for decision-making in the public sector. The workshop is organized by, among others, Professor Jan-Eric Nilsson, VTI.



Ulf Sandberg has been presented with the TTI Lifetime Achievement Award 2018

VTI’s Senior Research Leader Ulf Sandberg has been presented with the TTI Lifetime Achievement Award 2018 for his work on research into tyres and road surface.


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