道路条件对山区高速公路交通事故的影响

Empirical Study of Influence of Road Condition on Traffic Accident on Mountainous Expressway

为了有效预防山区高速公路交通事故的发生,提高事故隐患点识别的可操作性,基于山区某高速公路近5年交通事故数据,从道路条件成因分析入手,通过描述性统计分析不同道路条件下交通事故发生的时空分布,解析组合路段的交通事故与公路线形参数的关联关系,采用K-means聚类提取山区高速公路的高风险线形指标参数。结果表明,道路条件显著影响交通事故的发生,交通事故在特殊线形条件和交通环境下具有明显分段聚集的特点。

In order to effectively prevent the occurrence of traffic accidents on mountainous expressways and improve the operability of identification of hidden trouble area, the current study focused on the traffic accident data of expressway in certain mountainous area in recent five years. Starting from the analysis of the causes of road conditions, the spatial-temporal distribution of traffic accidents under different road conditions was conducted to descriptive statistical analysis to analyze the relationship between traffic accidents and road linear parameters. The K-means clustering method was used to extract the high-risk linear index parameters of mountainous expressway. The results show that road conditions significantly affect the occurrence of traffic accidents. Traffic accidents have obvious characteristics of segmentation and aggregation under special alignment conditions and traffic environment.