The Pennsylvania Transportation Institute at the Pennsylvania State University has conducted a comprehensive study on the development of some empirical relationships between skid resistance and pavement surface texture. This paper describes a part of the findings of this study. The most conceptually satisfying model, the Penn State Model for skid resistance-speed behavior, was developed and has shown that the model coefficients-correlate well with texture parameters. Skid resistance at any speed can be predicted from one microtexture and one macrotexture by using this model. Another attempt was made to develop the prediction model of skid number with ribbed and blank test tires from surface texture parameters and vice versa. Linear regression equations were used to relate each of the two tire test results to a measure of microtexture defined by British Pendulum Number (BPN) measurements, and to a measure of macrotexture defined by mean texture depth (MTD) determined from sand-patch tests. The concept of using both types of skid test data shows promise as a candidate indirect texture parameter measurement method.
DEVELOPMENT OF THE RELATIONSHIPS BETWEEN SKID RESISTANCE AND PAVEMENT SURFACE TEXTURE
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