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为了合理地评价高速公路的线形设计安全性,减少交通安全事故的发生,基于多因素综合分析,建立了高速公路线形安全性评判多级指标体系,基于可拓理论建立高速公路线形安全性综合评价模型,利用熵权法确定指标权重系数,将公路线形安全等级划分为优(1级)、中(2级)、差(3级)三个等级,计算各指标对评价等级的综合隶属度,合理评价公路线形安全性等级。并将该模型应用到某山区双车道高速公路,对该公路部分路段线形进行了安全性评价,验证了评价方法的可行性,并提出针对性的工程改善措施。
In order to rationally evaluate the safety of linear design of expressways and reduce the occurrence of traffic accidents, a multi-level index system of highway safety assessment based on multi-factor comprehensive analysis was established. Based on the extension theory, a comprehensive evaluation of expressway safety was established Model, the index weight coefficient is determined by the method of entropy, the linear safety grade of the highway is divided into three grades of excellent (grade 1), grade 2 (middle) and grade (3), and the comprehensive membership degree of each grade to the grade is calculated. Reasonable evaluation of highway safety level. The model is applied to a two - lane expressway in a mountainous area. The safety evaluation of some sections of the highway is carried out. The feasibility of the evaluation method is verified and the corresponding engineering improvement measures are put forward.