The current state of knowledge with both studded tire performance and methods of assessing pavement wear is reported. An annotated bibliography is presented of all known research on this subject from the u. S. And european sources, a review and evaluation of the data and results of completed studies and recommendations for future research. The objectives of the study were confined to the following tests: (1) correlation of data on the frictional characteristics of studded tires on ice, packed snow, and on bare pavements, and (2) development of a method, or methods, of quantitative assessment of the difference in wearing and abrasive effects of studded versus unstudded tires on different types of surfaces. A stud-resistance coefficient for operation on ice was derived and all u. S. Data are correlated with this parameter and ice temperature. No significant loss of braking performance on bare pavements is indicated with less than 100 studs per tire. Stopping distance might be increased by 10 percent with 200 studs. Methods for measuring wear and pavement roughness were investigated. Mathematical relations between the variables were developed which can serve in arriving at predictions of wear under local traffic conditions.
Abstract