This paper reports the results of many years of skid tests and macrotexture and microtexture measurements as well as newer sets of data obtained during a mini-test conducted in connection with a federal highway administration (fhwa) study to develop a normalization procedure for seasonal effects. The mini-test was concerned mainly with the variation of skid number as a function of placement on the pavement; both lateral and longitudinal placement were examined. It wasfound that longitudinal placement was not significant if the entiretest section was uniform; however, lateral placement is very important, as it can result in the skid numbers differing by more than 10.All of the data available from this mini-test and previous tests were used to correlate macrotexture, microtexture, speed gradient data, and ribbed- and blank-tire skid numbers. Linear correlations between texture measurements and skid numbers and between speed gradient data and skid numbers were found to be adequate in the normal range of measured skid numbers. Further work is needed before limiting values can be established. This paper appears in transportation research record no. 1196, Pavement evaluation and rehabilitation.
Abstract