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为了解决区域交通状态分析问题,提出了一种区域交通状态时空分层模型及其建立方法。根据区域交通状态分析需求,设定交通拥堵的不同截值,把路口状态划分为不同层次,建立了时空分层模型。该模型含盖了交通网络的微观、中观和宏观交通参数,包含交通网络时空信息和交通状态信息,得到路口可达性和路段连通性的分析结果,解决了目前区域交通状态自动分析中模型建立问题。仿真结果表明:分层模型能够把路网中不同交通状态的路口分离为具有不同可达性的层次,能够从中分析出路口可达性、路段连通性和路网交通状态的变化,并能够直接表示时空状态信息。该建模方法和分析方法可以直接用于交通状态的自动分析中,所提出分层模型也可用到交通诱导和交通控制中。
In order to solve the problem of regional traffic status analysis, a temporal and spatial hierarchical model of traffic status and its establishment method are proposed. According to the needs of regional traffic status analysis, different cut-offs of traffic congestion are set, and the intersection status is divided into different levels to establish a temporal-spatial layered model. The model includes the micro, meso and macro traffic parameters of traffic network, including the traffic network space-time information and traffic status information, obtains the analysis results of intersection accessibility and link connectivity, and solves the current model of automatic traffic state analysis Create a problem. The simulation results show that the hierarchical model can separate the intersections of different traffic states in the road network into different levels of reachability, and can analyze the changes of intersection accessibility, link connectivity and road network traffic status, and can directly Indicates the state of space-time information. The modeling method and analysis method can be directly used in the automatic analysis of traffic status, and the proposed layered model can also be used in traffic guidance and traffic control.