With the rapid development of highway in our country recently years, the questions of driving safety on highway have caught people's eyes progressively. Improving skid resistance performance and decreasing traffic accidents have been regarded as a hotspot-issue of asphalt pavement study.Fractal is a new theoretical tool to study lots of statistical self-similarity characteristics in nature, and it has a powerful function in describing and evaluating those phenomena continuous in scale, erose in shape or sto...