基于Vissim的Synchro干道信号协调优化方案选取研究

Comparative Analysis of Synchro Optimization Plans for Arterial Signal Coordination Based on Vissim Simulation

为了在Synchro进行干道信号协调优化时选取较好信号配时方案,应用Vissim模型搭建了基于最小延误、最少停车次数和最小PI值3种不同优化目标方案的仿真平台。以行程时间、延误、平均排队长度以及停车次数为评价指标,对比分析了3种优化目标方案。以北京市首都机场东区四纬路为例,研究结果表明,以行程时间、延误、平均排队长度以及停车次数为评价指标时,基于最小延误的优化方案均为最优。建议在利用Synchro进行干道信号协调优化时,采用基于最小延误的优化方案而不是默认的基于最小PI值方案。此外,基于最小PI值的优化方案在除停车次数之外的评价指标对比中,明显优于基于最少停车次数的优化方案。

In order to determine the optimal signal timing plan in Synchro for signal coordination on the arterial road,three simulation platforms were established by using VISSIM model based on the criteria of minimum delay,minimum stops,and minimum PI,respectively.A comparative analysis was conducted between the optimization plans by using the evaluation indexes of vehicle delay,vehicle travel time,queue length,and vehicle stops.A case study was carried out on Siwei Road in the East Section of Beijing Capital International Airport.The results indicate that the timing plan optimized based on the minimum delay performs best when all the four indexes are jointly considered.Consequently,it is recommended to adopt the optimization plan based on minimum delay instead of the default minimum PI when Synchro is used for arterial signal coordination.Further,the optimization timing plan based on the minimum PI performs significantly better than that based on the minimum stops on all indexes except vehicle stops.