The report 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 indications of the effects on traction of tire diameter and load rating. Traction uniformity on concrete between identical tires was found to be excellent, while the traction differences on concrete between tires of the same size but of different manufacture were found to be statistically significant. (Author)
Wet Traction Test Program
1973
58 pages
Report
No indication
English
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