考虑公交发车频率的信号优先控制方法

首先建立了发车频率、信号周期与不同落点数目的关系模型，并分析了不同落点数目对信号优先控制效果的影响．研究发现当落点数目为1或2即发车频率与信号周期或1／2信号周期成整数倍关系时，信号优先较易实现，且优先策略对社会车辆的影响较小．针对落点为1的情形，以公交车均延误最小为目标研究了落点最优位置模型和多申请下的优先控制模型．对落点为2的情形，提出了调整绿信比和设置重复绿灯相位的控制方法．应用Vissim进行的仿真分析表明，所提出的控制方法在降低公交车均延误和车头时距波动性方面具有显著效果，并能够较好地处理多申请下的信号优先．

Transit Signal Priority Strategies Based on the Consideration of Bus Frequency

This paper presents a mathematical depicture of the relationships between bus frequency,signal cycle,and number of arrival-time-point.The optimal number of arrival-time-point,which is found to be one or two,is obtained by analyzing their effects on the deviation of bus average delay and headway.This paper also presents the following transit signal priority control strategies: In one arrivaltime-point situation,a model to decide the optimal position of the expected arrivaltimepoint at the signal ring is established based on normal distributed bus arrival time;In two arrival-time-points situation,two signal priority strategies,green extension and doublebus-green-phase,are proposed.The results of the high performance simulation software Vissim show the proposed signal priority strategies are efficient in reducing average bus delay or bus headway deviation and dealing with multiple priority requests.