城市路网协调路径集的形成机理与控制方法研究

With the requirements of fine structure, global strategy, and orderly operation for road network traffic signal coordinated control, how to formulate a more complete theoretical method system of traffic signal coordinated control based on the traffic OD demand, the road network operational conditions, and the path traffic volume, becomes the new requirement for the development of modern urban traffic control. In this proposal, the coordinated path set will be taken as the research object, and a road network traffic signal coordinated control theoretical method system based on the coordinated path set is established by the researches on object selection, model establishment, scheme optimization, and effect evaluation. In this research, a group of new notions such as the coordinated path, coordinated path chain and coordinated path set are proposed. And a new signal coordinated optimization design concept from top to bottom is also provided. Then a modular design method of the road network traffic signal based on the coordinated path is put forward. Next the multi-level joint control structure of coordinated path set, coordinated path chain and coordinated path is designed. Furthermore, the analysis and evaluation of congestion evolution mechanism, traffic OD demand, and coordinated control effect of the coordinated path are studied using the traffic big data. As a result, the precision control requirements for urban road network traffic signal could be satisfied. The project research results will have both important academic value to improve the existing traffic signal control theory and great practical significance to meet the demand of actual control system.

如何根据交通OD需求、路网运行状态以及路径交通量，从路网交通信号协调控制的结构精细化、策略全局化、运行有序化等需要出发，建立一套更完备的交通信号协调控制理论方法体系，是现代城市交通控制发展的新要求。本项目将以协调路径集作为研究对象，从协调对象选取、模型建立、方案优化以及效果评价等方面展开相关科学研究，最终建立起一套面向协调路径集的路网交通信号协调控制理论方法体系。项目提出了协调路径、协调路径链、协调路径集这一组新概念，给出了一种自上而下的信号协调优化设计理念，提出了一种基于协调路径的路网交通信号模块化设计方法，设计了协调路径集、协调路径链以及协调路径之间的多级联动控制结构，并利用交通大数据对协调路径的拥堵演化机理、交通OD需求以及协调控制效果进行分析与评价，从而满足城市路网交通信号控制的精细化需求。项目研究成果对于完善现有交通信号控制理论和满足城市实际控制需求具有重要学术价值与现实意义。

本项目以协调路径集作为研究对象，从协调对象的选取、协调模型的建立、协调方案的优化以及协调效果的评价等方面展开相关科学研究，着重研究了路网协调路径集的形成机理与优选方法、面向路网协调路径集的协调控制模型算法、协调路径集结构下的单交叉口信号优化设计方法、面向路网协调路径集的交叉口联动控制技术、路网协调路径集控制效果的综合评价方法等内容。. 通过四年来的不断探索与研究，已构建协调路径、协调路径链、协调路径集的概念体系，可以满足城市路网交通信号控制的精细化需求，进一步完善了控制子区与交叉口群的划分理论；形成了面向协调路径集的路网交通信号协调控制模型与交叉口联控技术，建立了以协调路径为单元、以交叉口为单元节点的路网交通信号模块化设计方法；提出了区域路网协调路径集的动态生成及优化方法，发明了能够反映路径集协调控制效果的空间时距图，完成了对路网协调路径集控制效果的评价与优化。. 本项目主要研究成果已发表高水平学术论文15篇，申请发明专利10项，获得授权发明专利8项，获得计算机软件著作权1项，形成学术专著1部，其实施案例应用表明，通过对协调控制区域的公共信号周期、交叉口信号相序、相位差以及绿信比进行综合优化，可以降低平均停车次数约35%，减少平均延误时间约20%，显著提升了整个路网的车流运行效果。