区域交通状态分析的时空分层模型

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。

Spatial-temporal hierarchical model for area traffic state analysis

A spatial and temporal hierarchical model was developed for area traffic state analyses to predict area traffic states.The state analysis defines the different cut-values for traffic jams and partition intersection states into different hierarchies for the spatial and temporal hierarchical model.The model can represent micro-,meso-,and macro-traffic parameters with the spatial and temporal information and traffic state information for automatic traffic state analyses.Simulations show that the hierarchical model can partition intersections according to the traffic state of the intersections and the links of the traffic network.The intersection reachability,the link connectability and the network state can be deduced from the model.The model can be used for automatic analyses of area traffic networks and for vehicle route guidance and traffic control systems.