城市交通网络宏观控制模型及仿真实现

为研究适合城市交通网络控制系统应用的交通流预测模型,在改进Van Den Berg, M的路段交通流模型的基础上,建立了以路口交通流为基本建模单元,以动态非线性离散方程反映交通流变化的城市交通网络宏观模型.为验证该模型能有效地预测城市路网的交通流信息,在VC++net环境下,开发了城市交通宏观控制模型仿真系统UTFS,设计了网络拓扑结构模块,以适应不同规模、不同复杂程度的实际交通网络的仿真要求.最后选取典型网络进行应用研究.仿真结果表明:该模型满足交通控制对控制模型的实时性和精度要求,该仿真系统可以作为城市交通网络宏观控制模型验证的有效工具,也可以作为城市交通控制系统控制和优化研究的辅助工具.

Macroscopic Control Model of Urban Traffic Network and Its Simulation

The problem of traffic flow forecast model of city traffic control systems is discussed. A control-oriented macroscopic dynamic traffic flow discrete model is presented to describe the main urban traffic network dynamic behavior. In order to test the validity of the model , an urban macroscopic traffic simulation system is developed based on VC++ net compiler. A general urban traffic network topology is proposed for network simulation by decomposing it into certain network elements. An application case of actual traffic net is given .The simulation results show that the model is fit for on line accurately prediction in traffic control. The system is suitable for urban traffic control system analysis and optimal control.