上游停靠站公交溢出影响下交叉口公交优先配时优化

Study on the Method of Bus Priority Signal Timing at Intersections under the Influence of Bus Overflowing

针对交叉口进口道附近设置有公交停靠站的情况,探讨站点公交溢出的两种可能情形以及具体排队过程,并建立受车头时距等因素影响的排队等待时间模型.在此基础上,一方面分析公交停靠对交叉口进口道通行能力的影响,得到通行能力损失模型,进而对交叉口乘客延误公式进行修正;另一方面,通过对停靠站公交到达离开时间的研究,建立站点乘客延误模型.然后,基于客流量进行交叉口公交信号优先配时研究,在保障其他相位车辆基本运行的前提下,建立以乘客总延误最小为控制目标,公交优先相位绿灯时间为控制变量的公交信号优先控制模型.最后,通过实际案例进行模型计算,得到交叉口的最优配时方案,并利用仿真软件模拟分析.仿真结果表明:基于优化方法得到的信号配时方案,有效减少了交叉口乘客总延误时间,保障了各相位车辆的通畅.

Aiming at the situation of the bus stop near the entrance channel,the two possible situation of the bus spillover and the specific queuing process are discussed,and the corresponding queuing time model affected by factors such as time headway is established.On the basis of this,on the one hand,it analyzes the influence of the bus stop on the traffic capacity of the entrance crossing,and obtains the capacity loss model,and then corrects the formula of passenger delay at the intersection.On the other hand,through the study of the arrival and departure time of the bus stop,the station passenger delay model is established.Then,based on passenger traffic and in the protection of the basic operation of social vehicles,the bus signal priority control model is established with the minimum delay of the passenger as the control target and the bus priority phase green time as the control variable.Finally,the model is calculated by the actual case,the optimal scheme of the intersection is obtained,and the simulation software is used for the simulation analysis.The simulation results show that the signal timing scheme based on the optimization method can effectively reduce the total delay time of the passengers at the intersection and ensure the patency of each phase vehicle.