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为了分析山区高速公路不同路段危险性大小,给设计人员和道路安全管理人员提供参考,针对普遍存在危险的山区高速公路急弯路段,考虑道路线形、行驶速度、车型占比等因素的影响,进行了急弯路段行车安全性模糊综合评判的研究。分别以临界附着系数和荷载转移比作为小客车、大货车评价指标,采用仿真分析的方法得到评价指标具体数值,运用正交试验的方法确定影响因素及其权重向量,并得到评价指标的回归模型,在考虑小客车、大货车实际行驶速度不同以及车型占比不同的情况下,运用模糊综合评判的方法对数据进行分析,最终得到路段危险性大小。研究结果表明:行驶速度和圆曲线半径大小是影响行车安全的最主要因素;当高速公路线形相同时,小客车车型占比越高,发生交通事故的可能性越大;使用模糊综合评判的方法对急弯路段危险性大小进行分析和排序准确性较高,该方法可为设计人员修改道路线形,以及道路安全管理人员提高资金利用效能提供理论依据。
In order to analyze the dangerousness of different sections of expressway in mountainous area, the author provides reference for designers and road safety managers. In view of the ubiquitous dangerous mountainous expressway section of mountainous expressway, considering the influence of road alignment, driving speed and model proportion Study on the Fuzzy Comprehensive Evaluation of Traffic Safety on Sharp Curved Road. Using the critical adhesion coefficient and load-transfer ratio as the evaluation indexes of passenger cars and large trucks respectively, the numerical values of the evaluation indexes are obtained by means of simulation analysis. The orthogonal test is used to determine the influencing factors and their weight vectors and the regression model of the evaluation indexes , Taking into account the different passenger cars, large trucks and the actual speed of different vehicles accounted for a different proportion of cases, the use of fuzzy comprehensive evaluation of the data analysis, the final section of the size of the risk. The results show that the driving speed and the radius of the circular curve are the most important factors that affect the driving safety. When the expressways have the same line shape, the higher the proportion of the passenger car models, the greater the probability of traffic accidents. By using fuzzy comprehensive evaluation The method of analyzing and sorting the dangerous sections of sharply curved sections is of high accuracy. This method can provide a theoretical basis for designers to modify the road alignment and improve the efficiency of fund utilization by road safety managers.