Analysis And Modeling Of Traffic Behavior Characteristics Of Pedestrian Crossing At Signalized Intersection

China's urban central area is densely populated and has a large traffic volume,which is an important feature of urban road traffic in China.In recent years,with the further deepening of the degree of urbanization in China,the pressure of urban transport is also growing.The pedestrians face complex traffic conditions when crossing the signalized intersection at the urban roads.On the one hand,pedestrians will inevitably conflict with the motor vehicle flow and the non-motor vehicle flow;On the other hand,because the intersection often gathers a large number of pedestrians,there are frequent conflicts inside the pedestrian population.In this regard,domestic and foreign scholars have done a lot of research,which use computer simulation technology and pedestrian crossing simulation has become a hot research.The study of pedestrian traffic behavior is an important part of constructing pedestrian simulation model.Therefore,this paper provides a theoretical basis for the construction of pedestrian crossing traffic model based on the basic research on traffic behavior characteristics of pedestrian crossing.Based on the aerial video of pedestrian crossing at three intersections of Xiaozhai West Road-Zhuque Street,Xiaozhai West Road-Hanguang Road and Taibai South Road-Jixiang Road,this paper puts forward the measurement conditions of the free speed of pedestrian crossing and the statistical distribution of sex and age factors.At the same time,this paper analyzes the total pedestrian crossing speed the temporal and spatial characteristics of pedestrian crossing speed.Extract the basic parameters of pedestrian flow according to the pedestrian crossing aerial video and establish the speed-density,the speed-occupied space and the flow-occupied space models of pedestrian crossing at signalized intersections according to the pedestrian flow parameter curve.The data is amended based on the actual survey.This paper gets the smallest dynamic space and the theoretical value of capacity of pedestrian crossing.At the same time,the blocking characteristics and self-organization characteristics of the two-way pedestrian population are studied,and the application suggestions are given.With the help of Simi Motion software,based on the analysis of pedestrian space demand,the avoidance behavior and transcendence behavior of pedestrian individuals are analyzed,and the microscopic behavior parameters of pedestrian crossing are quantified.Finally,according to the analysis results of pedestrian crossing speed,based on the analysis of pedestrian macro-traffic behavior and micro-traffic behavior,the social force model which is widely used in pedestrian simulation,is used to calibrate and improve the actual scene of pedestrian crossing.VISSIM simulation verifies the reliability and superiority of the improved model.The conclusion of the study can provide a reference for the simulation modeling of pedestrian crossing.