STUDDED TIRE PAVEMENT WEAR REDUCTION AND REPAIR. PHASE III. COMPOSITE PRESENTATION OF PHASE I AND PHASE II RESULTS AND EXTRAPOLATION OF THE CONCLUSIONS TO REAL WORLD CONDITIONS

The report presents results obtained from the analyses of data which were collected during the performance of Phase I and Phase II of this project. Regression analyses were performed in order to relate various factors to each other. The factors used included stud type, stud protrusion, speed, air temperature, pavement temperature, environmental conditions, stud hardness and tire tread depth. The purpose was to evaluate the relative importance of these factors on pavement wear. It was found that the type of overlay, the type of stud and the stud protrusion length were the most important factors affecting pavement wear under WSU Test Track conditions. The other factors could not be sufficiently isolated to determine their relative importance. Average wear rates were calculated for the different types of pavements and overlays caused by the different stud types. A formula was developed which can be used to calculate pavement life under certain conditions.