用于估计信号交叉口行人延误的微观仿真系统

针对发展中城市中由定周期两相位交通灯控制的交叉口，建立了用于估计行人延误的微观仿真系统。信号灯周期被划分为一系列分相位，每个分相位持续1s。仿真系统包括车辆发生器、行人发生器、行人模型、统计模块等。其中，车辆发生器用于估算各分相位穿越人行横道的车流率，进而产生车辆序列；行人发生器用于产生到达人行横道的行人序列；行人模型包含若干行人行为规则；统计模块用于统计各分相位到达行人的平均延误，以及总的行人平均延误。最后，微观仿真系统用采集自西安市一个信号交叉口的数据进行了验证，结果表明它能比较准确地估计行人延误。

Microsimulation System for Estimating Pedestrian Delays at Signalized Intersections

A microsimulation system is proposed to estimate pedestrian delays at signalized intersections adopting pre-timed two-phase control in developing cities.The signal cycle is divided into a series of subphases,and each subphase lasts 1 second.The microsimulation system includes vehicle generator,pedestrian generator,pedestrian model,and statistical module.Vehicle generator is used to estimate the flow rate of vehicles crossing crosswalks for each subphase,and then generate vehicle sequences;pedestrian generator is used to generate pedestrian sequences arriving at crosswalks;pedestrian model includes a set of behavior rules;and statistical module calculates the average delay of pedestrians arriving during each subphase,and the overall average delay.Finally,the microsimulation system is validated using the field data collected from a signalized intersection in Xi'an,and the results indicate that it is able to estimate pedestrian delays accurately.