Quantitative Evaluation of Hydroplaning Risk on Wet Pavement Based on Critical Hydroplaning Velocity

Abstract:

A modified LuGre friction model was established and used to calculate the critical hydroplaning velocity， which is an indicator for determining the occurrence of hydroplaning events. Based on the water film thickness distribution and the probabilistic model of speed and wheel track， the probability of hydroplaning events was calculated to quantify the risk of hydroplaning， and the hydroplaning risk was set to five levels according to the probability. Results show that the critical hydroplaning velocity is significantly affected by the water film thickness， and related to the elevation of road sections. The critical hydroplaning velocity decreases in the disease area. The distribution of vehicle hydroplaning risk and critical hydroplaning velocity is basically the same， but the vehicle hydroplaning risk in the wheel track zone is relatively high. Meanwhile， at high rainfall intensity， more than 96% of disease-free or low-disease road sections are at low hydroplaning risk. However， in potholes， ruts and other road disease areas， the hydroplaning risk increases significantly， and high-risk areas appear， resulting in an increase of the road risk level.