The report documents and presents the results of a statistical analysis of accident data that attempts to provide a quantitative measure of the safety effects of studded tires on icy surfaces. Winter accident and driving data from two states, Minnesota and Michigan, were used in the study. Because a ban was placed on studded tires in Minnesota during the study period, a before-and-after type of analysis was possible for that state. Comparisons were made in terms of accident rates, using both accident data and exposure data, nature of accident involvement as influenced by slippery roads, and the incidence of injury. Data from 91,375 winter accidents involving 136,639 autos were available for the analysis of tire effects. Even with this large sample, some of the most sought-after relationships did not prove to be statistically significant at the 0.05 level of confidence. The findings of the study tend, in general, to show a slight safety advantage for studded tires.


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    Title :

    Studded Tires and Highway Safety - An Accident Analysis


    Contributors:

    Publication date :

    1978


    Size :

    78 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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