基于速度特征指标的高速公路线形一致性综合评价

发布时间：2018-09-05 09:46

【摘要】：为量化评价已建和拟建高速公路交通安全性,以实测运行车速数据和事故率数据为基础,根据公路空间属性的变化,采用不定长法进行路段划分。考虑不同路段车速协调性和连续性的需求,引入客货差极差比、车速降低系数、路段车速离散度等车速特征指标。通过对运行车速特征指标与事故率的相关性分析,采用多元回归的方法建立了高速公路线形设计一致性综合评价模型,同时结合事故多发点改善效果的显著性,确定我国高速公路安全性服务水平,在此基础上提出线形设计一致性评价标准和评价方法。太旧高速公路的实例应用结果表明,该方法可准确有效地评价线形设计一致性。
[Abstract]:In order to quantitatively evaluate the traffic safety of the highway that has been built and planned to be built, based on the measured data of running speed and accident rate, and according to the change of highway spatial attribute, the method of indefinite length is used to divide the road sections. Considering the requirements of the coordination and continuity of the speed of different road sections, the speed characteristic indexes such as the ratio of passenger and cargo differential range, the coefficient of speed reduction and the speed dispersion of road sections are introduced. Through the analysis of the correlation between the running speed characteristic index and the accident rate, the comprehensive evaluation model of the alignment design consistency of the expressway is established by using the method of multiple regression, and at the same time, the significance of improving the effect of the accident prone spot is also discussed. On the basis of determining the safety service level of expressway in China, the evaluation standard and evaluation method of linear design consistency are put forward. The application results of Taijiu Expressway show that this method can evaluate the consistency of linear design accurately and effectively.
【作者单位】：长安大学汽车学院;华南理工大学土木与交通学院;
【基金】：中国博士后基金项目(2014M552399)
【分类号】：U491

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