设置待行区条件下双环相位信号配时优化模型  

Signal timing optimization model of dual-ring phase under condition of setting waiting area

作　　者：杨震 马健霄[1] 王宝杰[2] YANG Zhen;MA Jianxiao;WANG Baojie(College of Automobile and Traffic Engineering,Nanjing Forestry University,Nanjing Jiangsu 210037,China;College of Transportation Engineering,Chang’an University,Xi’an Shaanxi 710064,China)

机构地区：[1]南京林业大学汽车与交通工程学院,南京210037 [2]长安大学运输工程学院,西安710064

出　　处：《计算机应用》2021年第7期2108-2112,共5页journal of Computer Applications

基　　金：江苏省自然科学基金资助项目(BK20170932);南京林业大学青年科技创新基金资助项目(CX2017011);国家自然科学基金青年科学基金资助项目(51908060);长安大学研究生教育教学改革建设专项(300103190133)。

摘　　要：为提高设有待行区交叉口的行车效率,首先将设置待行区的效果等价于车道绿信比的增加;接着基于美国国家电气制造商协会(NEMA)标准双环相位,以车辆平均延误最小为目标,建立了交叉口信号配时优化模型;然后考虑相位结构中环-屏障约束条件,设计了用于求解模型的遗传算法;最后将模型和算法应用于实例交叉口。研究结果表明:该模型能够得到比Synchro软件周期更短、车辆平均延误更低的信号配时方案。在交叉口仅设置左转待行区的条件下,模型的延误降低幅度为12.9%~17.4%;在交叉口同时设置左转、直行待行区的条件下,模型的延误降低幅度为17.5%~25.5%。此外,该模型对排队消散速度的取值并不敏感,在最小及最大车速的条件下能够得到几乎相同的配时方案。In order to improve the driving efficiency of intersections with waiting areas,the effect of setting waiting area was firstly equal to the increase of lane green ratio.Then a signal timing optimization model for intersection was developed based on National Electronic Manufacturers Association(NEMA)standard dual-ring phase with the objective of minimizing the average vehicular delay.Next,a genetic algorithm for solving the model was designed by considering the ring-barrier constraint in phase structure.Finally,the model and algorithm were applied to the example intersection.The results show that compared to the signal timing scheme obtained by Synchro software,the model can obtain the scheme with shorter cycle and lower average vehicular delay.The delay reduction of the proposed model ranges from 12.9%to 17.4%when only leftturn waiting areas are provided at the intersections,and from 17.5%to 25.5%when both left-turn and through-movement waiting areas are provided.Besides,the model is not sensitive to the value of queue clearance rate,and can obtain almost the same signal timing scheme at the minimum and maximum vehicular speeds.

关 键 词：交叉口 信号配时优化 遗传算法 待行区 双环相位 

分 类 号：TP273.5[自动化与计算机技术—检测技术与自动化装置] U491.54[自动化与计算机技术—控制科学与工程]