中文摘要：

为向拥堵状态城市路网的交通控制优化提供依据，综述并评价了过饱和状态的交通信号控制策略；分析了过饱和状态交通流的特征，提出了过饱和状态交通信号控制的对应优化原理；从单点交叉口、协同控制交叉口及路网3个层次对过饱和状态交通控制方法进行了总结与评价，应用VISSIM仿真环境评价了已有控制策略的适用性；总结了具备处理过饱和状态能力的自适应交通信号控制系统的控制策略。仿真结果表明：过饱和状态的交通信号控制应优先优化道路空间的分配矛盾；排队管理策略对过饱和交通流具有较好的优化效果；建议在进行过饱和交通信号控制优化时，结合实时交通信息，采用排队管理、关键路径通行能力最大等控制策略，在交叉口群或路网层面对交通信号控制方案进行优化。

英文摘要：

To provide references for traffic control optimization at congested urban road network, various traffic signal control strategies under over-saturated conditions were reviewed and evaluated. Based on the analysis of the characteristics of over-saturated traffic flow, the corresponding optimization principles of traffic signal control under over-saturated conditions were proposed. The traffic control strategies for isolated intersection, coordinated intersections and road network were summarized and evaluated by using VISSIM simulation environment. The control measures of adaptive traffic signal control system with the capability to deal with over-saturated conditions were summarized. Simulation result indicates that traffic signal control strategies under over-saturated conditions should optimize the allocation of road space in the first place. The queue management strategy has better performance on optimizing traffic signal under over-saturated conditions, It is suggested that the strategies like queue ratio maintenance and throughput maximization for critical route should be utilized with real-time traffic information for the optimization at the intersection group or road network level. 4 tabs, 7 figs, 56 refs.