过饱和条件下信号交叉口协调控制可靠性优化  

Reliability Optimization of Signalized Intersection Coordinated Control under Oversaturated Condition

作　　者：王浩[1] 吴翱翔[2] 杨晓光[2] 

机构地区：[1]上海应用技术学院,上海201418 [2]同济大学交通运输工程学院,上海201804

出　　处：《公路交通科技》2012年第11期86-91,共6页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金项目(50908174);国家自然科学基金项目(60974093)

摘　　要：以避免交叉口出现死锁和减少绿灯时间浪费为目标,利用交通流波动理论,建立了一种过饱和条件下的信号交叉口协调控制的可靠性优化模型,并提供了可靠性区间的计算方法。该模型基于信号控制交叉口处不同的排队溢出形式和交通流波动状态的分类研究,以控制排队溢出形式和上下游交叉口通行能力匹配作为约束条件,以增大排队溢出缓冲时间作为优化目标。通过仿真试验表明,该策略可以减少延误24.6%,同时交叉口的死锁概率降低30%,能有效地承受过饱和交通流的冲击,提高路网的可靠性。Aiming at avoiding the appearance of intersection dead lock and reducing the waste of green time, a reliability optimization model for coordinated control of signalized intersection under oversaturated condition was established by using the traffic fluctuation theory, and the calculation method of reliability section was presented as well. The model is based on research of different types of queue spillover and fluctuation profile of traffic flow on signalized intersection. The objective is to maximize the buffering time of the intersection when queue spillover is occurred. It constraints the form of spillover in certain type, and keeps the capacity matching between upstream and downstream intersections at the same time. The simulations show that it can reduce the delay by 24.6% , and can decrease the probability of dead lock by 30%. This strategy improves the tolerance of intersection and the reliability of road network significantly under oversaturated condition.

关 键 词：交通工程 信号协调控制 可靠性优化 相位差 过饱和 排队溢出 

分 类 号：U491.51[交通运输工程—交通运输规划与管理]