Analysis of vehicle speed characteristics and traffic safety evaluation at intersections of highway through villages and towns
Under the strategy of rural revitalization,it is an important practical problem to deal with accidents on highways through villages and towns,and the speed characteristic analysis and traffic safety evaluation at intersections of highways through villages and towns have become urgent theoretical needs.In this paper,two typical road intersections in Yunnan Province were selected as examples,and the Unmanned Aerial Vehicle(UAV)video data was collected by DJI UAV.Based on the data,the variation rule of vehicle speed at road intersections in villages and towns was analyzed.At the same time,a risk coefficient model and a driving safety level determination model of the Vague complex were constructed to assess the driving safety level of highway intersections across villages and towns,and the results were verified by example intersections.The results show that the vehicle running speed at the road intersections presents a"deceleration-acceleration"mode,and the lowest point is near the intersection center.For multi-way intersections with complex road conditions,the velocity distribution is[40,65]km/h,and the fluctuation range is relatively small than that of intersections.Compared with the driving scene without roadside interference,the intersection speed dispersion is larger in the collision avoidance scene,and the maximum speed difference is 49.78 km/h.The driving safety of the case intersection was evaluated,and it was found that the closer the vehicle entered the intersection center,the greater the risk factor was,while the opposite was true when it left the intersection.The maximum risk coefficient of the two intersections is located in the center of the intersection,where the acceleration changes fastest and the driving safety is lowest.Crossing traffic safety is worse,prone to traffic accidents,multi-way intersection traffic safety is good.The research results can provide a theoretical basis for road accident management in highways through villages and towns.
safety engineeringdriving safety evaluationVague complex elementvelocity characteristicintersections of highway through villages and towns
NETL
NSTL
万方数据
维普
