城市单点交叉口的信号配时优化研究  

Traffic Signal Timing Optimization at City Single Point Intersection

作　　者：孙超[1] 徐建闽[1] 

机构地区：[1]华南理工大学,广州510640

出　　处：《交通与计算机》2008年第6期6-10,17,共6页Computer and Communications

基　　金：国家863科技攻关项目(批准号:2006A11Z211);广东省科技公关项目(批准号:2005A10101001)资助

摘　　要：信号配时优化是提高交叉口服务水平的重要途径。文章系统地介绍了信号配时模型的现有研究成果,然后分析了Synchro仿真系统中信号配时优化模型、用于延误计算的百分比延误方法(PDM)模型、排队长度计算模型、停车次数计算模型、通行能力计算模型和服务水平等模型,并以延误、停车次数、排队长度组合成的综合性能指标对广州市天河北路与天河东路交叉口的当前信号相位、相序进行了全面的优化研究。应用Synchro系统优化后,最大车流量和通过能力比由1.24减小到1.02,平均控制延误由85.8 s减少到60.3 s,服务水平由F级提高到E级。Timing optimization is an important method to improve the service level of signal controlled intersection. Firstly, the existing research result on signal timing model was systematically presented. Then, the signal timing optimization model, PDM percentile delay method model, queue length calculation model, parking rate model, capacity calculation model and LOS （level of service） model were analyzed in Synchro simulation system. Through taking the intersection at North Tianhe Road and the East Tianhe Road in Guangzhou as an example, the phase time and phase sequence of the current intersection were completely optimized with the comprehensive performance indicators, including the delay, parking rate and queue length. After the optimization of Synchro system, the maximum v/c ratio may decrease from 1.53 to 1.04, the average control delay may decrease from 85.8 seconds to 60.3 seconds, and the LOS may be improved from Level F to E.

关 键 词：交通工程 单点交叉口 信号配时优化 SYNCHRO系统 仿真 

分 类 号：U491.51[交通运输工程—交通运输规划与管理]