Åtgärder på det kommunala vägnätet i fem tätorter: demonstrationsprojekt i Vägverket Region Mälardalen år 2001/2002

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Hans Thulin
Bo Karlsson

By commission of the Mälardalen Region of the Swedish National Road Administration, the Swedish Road and Transport Research Institute (VTI) studied the effect of improvements to streets in five towns. The effects studied related to safety, accessibility, emissions of gases, particulates and noise by vehicles. The views of road users regarding the improvements and their effects were also examined. This was done via questionnaire surveys. The improvements were intended to reduce vehicle speeds and the distance over which vulnerable road users were exposed to vehicular traffic. Roundabouts, cycle tracks and refuges were constructed. At one site a roundabout with a traffic island painted so as to give a three dimensional impression was tested. Other improvement measures were raising of pedestrian/cycle crossings, improvement of lighting at pedestrian and cycle crossings. The sites were videoed. This material was used as the basis in assessing the traffic safety effect, counting road users and determining vehicle speeds at points where vulnerable road users crossed the street. Pneumatic tube measurements were made to determine route choice and journey times. At one site, the driving patterns of vehicles were surveyed via a pursuit vehicle. The gas and particulate emissions of vehicles were calculated with the VETO model. This model was also used to calculate the effect of the improvements on traffic noise.  

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