Aggregate Resistance to Polishing and Its Relationship to Skid Resistance (0-5627-S)

In 1999, the Texas Department of Transportation (TxDOT) implemented a statewide Wet Weather Accident Reduction Program (WWARP) to reduce skid-related accidents in Texas. The Surface Aggregate Classification (SAC) system, one of the WWARP's outcomes, is used for the selection for aggregates in the pavement surface based on their frictional characteristics. In order to improve the SAC, TxDOT funded a research project with the Texas Transportation Institute to develop a model for predicting the pavement skid resistance based on measurable aggregate and mixture properties. This model would help in the selection of aggregate type and mixture design that are needed to meet the required asphalt pavement skid resistance, and consequently, construct safe roads with minimal cost of maintenance and rehabilitation.