基于道路联网的动态信号灯配时模型
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摘要
在拥堵交通状态下,目前的信号灯配时算法仅限于处理单个路段的拥堵状况,忽视了致使拥堵的原因是由于未限制过多的汇入车辆而造成的。本文选取当下使用较为普遍的一种算法——Webster绿信比优化模型,在原有模型基础上,将每个信号灯关联,使每一个信号灯时长的分配不再仅取决于单个路段交通流特征,还受限于与其关联的其余信号灯的分配时长,以达到一处拥堵,多处联合调节的优化模式。经仿真实验所证实,本优化算法在处理拥堵,尤其是多处拥堵同时发生的情况,较之传统配时模型更为有效。
Under congested traffic conditions, the current signal timing algorithm is limited to dealing with congestion on a single road segment, ignoring the cause of congestion due to not restricting too many incoming vehicles. This paper selects the Webster green letter ratio optimization model, which is currently used more generally, and on the basis of the original model, associates each signal lamp, so that the allocation of the duration of each signal lamp no longer depends only on the traffic characteristics of a single road section. Limited by the duration of the distribution of the remaining semaphores associated with it, to achieve a congestion, multiple joint optimization of the optimization mode. The simulation experiments confirmed that this optimization algorithm is more effective than traditional time-matching models in dealing with congestion, especially when multiple congestions occur at the same time.
Under congested traffic conditions, the current signal timing algorithm is limited to dealing with congestion on a single road segment, ignoring the cause of congestion due to not restricting too many incoming vehicles. This paper selects the Webster green letter ratio optimization model, which is currently used more generally, and on the basis of the original model, associates each signal lamp, so that the allocation of the duration of each signal lamp no longer depends only on the traffic characteristics of a single road section. Limited by the duration of the distribution of the remaining semaphores associated with it, to achieve a congestion, multiple joint optimization of the optimization mode. The simulation experiments confirmed that this optimization algorithm is more effective than traditional time-matching models in dealing with congestion, especially when multiple congestions occur at the same time.
引文
[1]裴玉龙,蒋贤才.饱和交通状态下的绿信比优化及其应用研究[J].哈尔滨工业大学学报,2005,37(11):1499-1502.
[2]Mchalopoulos,P.G,Stephanopolos,G.May.Optimal Control of Oversaturated Intersections Theoretical Practical Considerations|J].Traffic Engineering&Control,1978,Vol.11(3):216-221.
[3]蔡锦德.城市道路交叉口的信号配时优化研究[D].北京交通大学,2012.
[2]Mchalopoulos,P.G,Stephanopolos,G.May.Optimal Control of Oversaturated Intersections Theoretical Practical Considerations|J].Traffic Engineering&Control,1978,Vol.11(3):216-221.
[3]蔡锦德.城市道路交叉口的信号配时优化研究[D].北京交通大学,2012.