Study on Continuous Road Friction Measurement Under Various Environmental Conditions

This paper deals with a study to construct a road friction characteristic database as the first step in building a system to estimate road friction characteristics ahead, which is one of the major issues in traffic safety. To achieve this goal, we proposed a new method that can continuously measure the peak μ in the μ-s characteristic and showed the measurement results on different road surfaces. Based on these results, in this paper we measure the friction characteristics of snow and ice surfaces at a well-maintained test site and present the continuous μ-s characteristics on the surfaces and the peak μ regions on each surface. Furthermore, measurements are also performed on ordinary roads under snowy conditions, and a comparison with the results from the proving ground, it is shown that we need to examine the dynamics of the μ-s characteristics.