Simulation Research On Social Force Model Of Non-motorized Vehicles Turning Left At Intersection

As the concept of green traffic development is deeply rooted in the hearts of the people,the proportion of non-motorized vehicle trips is on the rise.In order to improve the traffic capacity of the intersection,when the traffic of non-motorized vehicles turning left at the intersection is large,non-motorized vehicles are generally used to turn left once to cross the street.Organization of traffic.It is necessary to accurately grasp the flow of left-turning non-motor vehicles and establish a corresponding simulation model as a quantitative analysis tool for intersections.This paper takes left-turning non-motorized vehicles at intersections as the research object,and takes two types of intersections with marked left-turned non-motorized vehicle trajectories and unmarked left-turned non-motorized vehicles as the research background.Based on the expansion characteristics of turning non-motorized vehicles and the characteristics of driving along the trajectory,a simulation model of the social force of nonmotorized vehicles turning left at two types of intersections is established,and by comparing the simulations of the two types of intersections,it is determined whether the intersection should be left-turned or not.Non-motor vehicle driving trajectory lines give advice.The specific research content of the paper is as follows:(1)Research on behavior characteristics of left-turn non-motorized vehicles.By collecting the traffic data of left-turn non-motorized vehicles at intersections with marked left-turn nonmotorized vehicle trajectories and non-drawn left-turned non-motorized vehicle trajectories,the left-turn expansion characteristics and characteristics of non-motorized vehicles at two types of intersections are mainly analyzed.Trajectory driving characteristics.It is concluded that the left-turn non-motor vehicle crossing speed at the intersection with the left-turn non-motor vehicle trajectory line is lower than that of the non-drawn left-turn non-motor vehicle trajectory line intersection;its expansion width is related to the left-turn non-motor vehicle flow rate,electric vehicle The mixing ratio is related to factors such as trajectory line drawing;left-turn non-motorized vehicles tend to drive close to the trajectory line when crossing the street.(2)Construct the social force simulation model of non-motorized vehicles turning left at the intersection.A dynamic expansion boundary model is proposed to truly reproduce the simulation expansion phenomenon of left-turning non-motorized vehicles through boundary correction coefficients.In order to describe the characteristics of left-turning non-motorized vehicles traveling along the trajectory at the intersection with left-turning non-motorized vehicles,the boundary force of the trajectory is introduced.Combined with the survey data,the parameters of the force intensity of the trajectory boundary force,the range of the trajectory boundary force,the dynamic expansion boundary force intensity,the dynamic expansion boundary force range and the boundary correction coefficient were calibrated.The authenticity of the model is verified by the trajectory map,the distance between individual non-motorized vehicles and the basic map.(3)Example application of the simulation model.Based on the actual measurement of the non-motorized left-turn non-motorized vehicle trajectory intersection,the simulation comparison experiment is carried out,the implementation effect of the left-turned nonmotorized vehicle trajectory line at the intersection of different sizes is analyzed,and the leftturned non-motorized vehicle is drawn according to the simulation results.Suggestions for intersections of motor vehicle trajectory lines.