Comprehensive safety evaluation of continuous downhill slope based on multilevel fuzzy mathematical analysis

Traffic accidents occur frequently on the continuous downhill section of highway in China, and the severity of accidents is relatively high. At present, the safety evaluation of continuous downhill section mainly relies on empirical analysis and statistical analysis, and there are few quantitative comprehensive evaluation models. In this paper, based on the traffic safety characteristics of continuous downhill section, on the basis of soliciting the opinions of many experts in the industry, the evaluation index related to highway traffic safety is divided into target layer, reference layer, and factor layer, and the evaluation index structure system model is established. By using the nine-level scale method and the maximum membership method in fuzzy mathematics, the comprehensive evaluation model of continuous downhill safety is established. Through quantitative analysis, the risk factors of the continuous downhill section are determined, the comprehensive risk model of traffic safety is established, and the highway safety risk situation is quantified, which provides an effective method for the quantitative assessment of the comprehensive safety situation of the continuous downhill section, and solves the problems that are difficult to assess in the construction process. Not only has the guiding significance to the improvement of the traffic safety of the existing highway, It can also provide a basis for comparison and selection of safety advantages and disadvantages among different engineering schemes.