考虑行人保护策略的交叉口信号配时优化模型  

Intersection Signal Timing Optimization Model Considering Pedestrian Protection Strategies

作　　者：杨震 马健霄[1] 王宝杰[2] 李根 YANG Zhen;MAJian-xiao;WANG Bao-jie;LI Gen(College of Automobile and Traffic Engineering,Nanjing Forestry University,Nanjing 210037,China;College of Transportation Engineering,Chang'an University,Xi'an 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：《交通运输系统工程与信息》2021年第3期71-77,85,共8页Journal of Transportation Systems Engineering and Information Technology

基　　金：国家自然科学基金青年科学基金(51908060);江苏省自然科学基金(BK20170932);南京林业大学青年科技创新基金/(CX2017011)。

摘　　要：为促进平面交叉口的行人交通安全,本文基于美国国家电气制造商协会(NEMA)的双环相位标准,将行人专用相位(EPP)、行人同步保护相位(CYPP)以及行人前置相位(LPI)这3种行人保护策略整合到一起,以信号周期和行人-右转车的冲突点数量最小化为目标,构建交叉口信号配时优化模型。在假定交通参与者遵守信号规则的前提下,除LPI策略中远端行人与右转车冲突外,其余冲突点经模型优化后皆可消除,并且机动车的通行效率能够得到维持。该模型属于0-1混合整数线性规划问题(BMILP),可用分支定界法求解。选取南京市两个交叉口进行实例研究。结果表明:在交叉口几何尺寸及交通流量较小时,模型倾向于得到EPP方案,否则倾向于得到CYPP和LPI方案;在进口道设有直右共享车道或右转相位不易满足最大饱和度限制时,模型倾向于得到LPI方案。To promote pedestrians'safety at intersections,this paper establishes a signal timing optimization model based on the NEMA dual-ring standard by incorporating three pedestrian protection strategies,i.e.,exclusive pedestrian phase(EPP),concurrent yet protected phase(CYPP),and leading pedestrian interval(LPI).The model aims at minimizing the cycle length and the conflicts between right-turn vehicles and pedestrians.By supposing that the traffic users obey the signal rule,the model can eliminate most of the conflicts,leaving only the conflicts between far-side pedestrians and right-turn vehicles under LPI control.The model belongs to Binary-Mix-Integer-Linear-Program(BMILP)and can be solved by the branch-and-bound method.Two intersections in the city of Nanjing are selected for a case study.The results show that when the intersection size is small and the traffic volume is low,the EPP is more likely to be obtained;the CYPP or LPI is otherwise.When the shared through-right lane is set in the intersection arm or the right-turn phase is not easy to meet the maximum volume-to-capacity ratio,LPI is more likely to be obtained.

关 键 词：交通工程 信号配时优化 0-1混合整数线性规划 交叉口 行人保护策略 

分 类 号：U491.54[交通运输工程—交通运输规划与管理]