Demoprojekt Region Mälardalen: resultat från undersökningar i fem tätorter år 2000/2001

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Hans Thulin
Bo O. Karlsson

The Swedish Road and Transport Research Institute (VTI) has studied the effects of measures taken on the street network in five towns. The effects studied were safety, trafficability and environmental impact (as the effect of gas, particle and noise emissions). The measures taken were physical measures with the principal purpose of reducing vehicle speeds and reducing the distance over which pedestrians and cyclists were exposed. The levels of intersections were raised, pinch points or chicanes were constructed along streets, different types of surfacings were laid in order to reinforce the perception of a reduced street space. Before and after studies were performed. The sites were videoed. The results of this formed the basis for assessing the safety effect and determining trafficability and vehicle flows. The video footage was also used to determine the speed distribution of vehicles on pedestrian and cycle crossings. The driving pattern of vehicles was studied with the help of the pursuit vehicle at some of the sites in order to determine the speed reducing effect of the measures along the street. The gas and particle emissions of vehicles were estimated using the VETO model. This model was also used to make an advance estimate of the effect of the measures on traffic noise. Attitude surveys were conducted at the sites to determine the opinions of road users concerning the measures.

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