Skid resistance plays a very important role in specifications for new highway design, construction, management, maintenance, road safety, accident investigations etc. The skid resistance is usually measured using ASTM E 274 skid resistance trailer and traffic was usually disrupted. The pavementtexture is the controlling factor in the skid-resistance level of roadwaysurfaces. Through a complex interaction of micro and macro textures at the pavement-tire interface, sufficient friction is developed for vehicles to perform routine maneuvers under normal operating conditions. In this manuscript, a correlation between the SN40S collected by locked wheel skid tester and the texture data or Mean Profile Depth (MPD) collected by a vehicle mounted laser operating at highway speeds is presented. The proposed correlation is positive for MPD values less than 0.75 mm to reach a peak SN40S value, then there is a negative correlation as the MPD increases until the MPD value is equal to 1.1 mm and beyond the MPD value of 1.1mm to the maximum valued of 1.4mm measured in this research, SN40S value remains almost constant. It is also seen that there is significant data scatter for the MPD value of 0.8mm. The test result shows a similar trend for old asphalt pavements, but with lower SN40S values due to polishing of pavement micro-texture by traffic. It is suggested that a combination of the Root MeanSquare value of the pavement texture, age of the pavement and traffic volume should be used for the correlation to predict the skid resistance.
Abstract