交通干线动态双向绿波带控制技术研究

Study on traffic trunk dynamic two-direction green wave control technique

在多智能体道路交通控制概念模型基础上,提出了一种全新的交通干线动态双向绿波带智能协调控制策略.通过中心协调智能体和路口控制智能体间的信息交互和协调,在确保路口绿灯时间利用率较高的前提下,实现干线双向车流不停车地通行.中心协调智能体根据一段时间内交通流信息计算公共信号周期和上下行相位差,路口控制智能体实时确定各路口的绿信比.公共信号周期依照关键路口饱和度的大小由模糊控制算法进行调整,相位差根据上下行速度和路段长度进行计算,绿信比基于历史和实时的交通数据确定.实际应用证明了该控制策略的有效性.

On the basis of a multi-agent-based traffic control conceptual model, a novel traffic trunk dynamic two-direction green wave coordinate control strategy was proposed. Through exchanging messages and cooperating between centre coordination agent （CCA） and local control agents （LCA）, the two-direction vehicle-flow passes each intersection on the trunk without stop as fast as possible while the utility efficiency of green light time in each intersection is at relatively high level. The public cycle time, up-run offset and down-run offset are calculated in the CCA, and the splits of each intersection are adjusted in the LCA at the end of each cycle. The public cycle time is adjusted by a fuzzy arithmetic according to the traffic flow saturation degree of the key intersection on the trunk. The offset is obtained by dividing the section length of the trunk between two adjacent intersections by the up-run speeds or the down-run speeds. The variable splits of each intersection are based on historical and real-time traffic information. The factual application results show that the strategy performs well.