基于车载GNSS数据的公路测绘及事故多发路段分析

采用车载GPS系统对某公路路段的平面坐标数据进行测绘与数据采集,使用专家打分法对公路环境与事故进行关联性分析,并关联坐标方位角与事故发生之间的关系。结果表明,采用车载GPS系统可以对公路路段信息进行有效采集,包括平面坐标数据和计算坐标方位角; K65～K67公路直线段和曲线段事故次数平均值分别为11次和32次,曲线段事故平均次数约为直线段事故次数的3倍。专家评分结果与事故次数之间具有较高的关联性,即专家评分较高的路段,事故次数较少,而专家评分较低的路段,事故次数较多;公路线形对公路交通事故的影响与专家评分结果相吻合。

Highway mapping and accident prone section analysis based on vehicle GNSS data

The plane coordinate of a highway section is surveyed and collected by vehicle GPS system,and the correlation between the highway environment and the accident is analyzed by using the expert scoring method,and the relationship between the coordinate azimuth and the accident is considered. The results show that the on-board GPS system can effectively collect the road section information,including their plane coordinates and azimuths of the road,the average number of accidents in the straight and curve section of K65 ~ K67 highway section is 11 and 32 respectively,and the accidents in the curve section is about 3 times of that in the straight section,and there is also a good correlation between the results of expert scores and the number of accidents,that is,the road section with higher expert scores has less accidents,while the road section with lower expert scores has more accidents. The influence of highway alignment on highway traffic accidents is consistent with the results of expert evaluation.