WET TRACTION TEST PROGRAM

This paper describes a test in which 86 tires (2 each of 43 different types representing 90% of the O.E. population) were measured for longitudinal and lateral traction capability on 3 different wetted surfaces. The resulting data was subjected to a simple but thorough statistical analysis. Findings of general interest emerged showing the fallibility of the "skid number" for characterizing a tire-pavement combination, the independent nature of lateral traction with respect to longitudinal traction, and the effects on traction of tire diameter and load rating. Traction uniformity between identical tires was found to be excellent, while the traction differences between tires of the same size but of different manufacture were found to be statistically significant. These latter two findings lead to the conclusion that traction grading on one of the three surfaces, concrete, is possible. /HSRI/

  • Corporate Authors:

    Highway Safety Research Institute

    Huron Parkway and Baxter Road
    Ann Arbor, MI  United States  48109
  • Authors:
    • Wild, R E
  • Publication Date: 1973-2

Media Info

  • Features: References; Tables;
  • Pagination: 50 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00260719
  • Record Type: Publication
  • Source Agency: Highway Safety Research Institute
  • Report/Paper Numbers: DOT-HS-800 917 Final Rpt.
  • Contract Numbers: DOT-HS-031-2-283
  • Files: TRIS
  • Created Date: Nov 6 1974 12:00AM