Research On Social Force Model Of Pedestrian At Signalized Crosswalk

At present,studies on Microscopic Simulation Model of Pedestrian mainly focus on locations such as large buildings or urban subway stations.there are few attention paid to Signalized Crosswalks.this paper aims to combine the pedestrian crossing characteristics,and behavior.to develop a model applying to the signalized crosswalk and this model is based on the social force model.Zhuque Street and Xiaozhai West Road intersection and Zhuque Street and Yanta West Road intersection are choosen as the survey sites and with the help of aerial photography technology,pedestrian crossing characteristics are recorded.Use Tracker to extract pedestrian traffic flow parameters and establish the relationship between them.Meanwhile,according to requirements extract different types of pedestrian speeds and analyze their distribution characteristics.besides,analyze the distribution characteristics of pedestrian crossing speed from both time and space.This paper analyzes the characteristics of pedestrian crossing behavior from a micro perspective,and explains the formation and dissipation process of traffic phenomena from a macro perspective.Both lay the foundation for the establishment and calibration of the model,and at the same time provides a reference for the verification of the model.This paper analyzes the principle of the traditional social force model and its shortcomings in the process of simulation on pedestrian behavior at signalized crosswalk.In order to improve the traditional social power model,the main contents are as follows:(1)Introduce the visual perception domain of pedestrians to limit the range of force between the subject and the object pedestrians;establishe a safe walking space for pedestrians and introduce avoidance mechanisms to make pedestrian avoid other pedestrians initiatively;(2)By the analysis of characteristics of pedestrian speed on the time and space,consider the effects of the distance between the pedestrian and the crosswalk exit and the remaining time of the green flash on pedestrian traffic behavior and establish the pedestrian signal light mechanism;(3)Collect traffic survey data and consult relevant materials to determine model parameters,;Use MATLAB to build simulation platform and evaluate the simulation effect of the model from the self-organization phenomenon,speed-density relationship and speed distribution;(4)Set up two sets of simulation experiments of avoidance behavior;by comparing the movement trajectories of the two groups of experimental pedestrians between the original and improved one,the result verify that the improved model is much closer to actual movement of pedestrians...