The report documents and presents the reesults of a statistical analysis of accident data that attempts to provide a quantitative measures of the safety effects of studded tires on icy surface. The findings of the study tend, in general, to show a slight safety advantage for studded tires. 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 incident 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. 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.

  • Corporate Authors:

    Calspan Corporation

    4455 Genesee Street
    Buffalo, NY  United States  14225
  • Publication Date: 1978-5

Subject/Index Terms

Filing Info

  • Accession Number: 00321235
  • Record Type: Publication
  • Source Agency: Transportation Systems Center
  • Files: TSR
  • Created Date: Oct 30 1982 12:00AM