Skidding is considered to be an important contributory factor in traffic accidents. Skidding can in principle be prevented in two ways, viz: (a) reduction of the minimum necessary friction; (b) increasing the available friction. The minimum necessary friction depends on the desired driving behaviour which is affected mainly by factors associated with the road, the vehicle, other traffic and the weather. The available friction depends on the nature of the contact between the tire and the road surface. Various investigations have shown that, among other factors, the skidding resistance of the road surface influences the likelihood of skidding and hence of an accident. However, it has not yet been possible, on the basis of these investigations, to determine a definite 'minimum necessary' value for the skidding resistance of a road surface. It is concluded that--partly for the sake of uniformity--the guide value already employed by the State Road Laboratory for many years for State roads and recently also for secondary roads, should be recommended as a provisional guide value for the skidding resistance of all roads in the Netherlands. This minimum skidding resistance for a wet road surface, expressed as the coefficient of friction, measured with a standardized patterned measuring tire at 86% longitudinal slip and a road speed at 50 km/h, is 0.51. (Author)


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    Title :

    Skidding Accidents


    Publication date :

    1970


    Size :

    54 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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