高速公路流量控制改进模型研究

国内高速公路流量控制目前一般采用分段宏观模型,而实际上高速公路往往在出口匝道之前500 m至入口匝道之后500m路段车辆状态改变较为频繁,其后路面车辆一般较为平稳.文章基于这种状况上建立高速公路流量微观区分模型,其参数随着高速公路路段数据来识别.结果显示,这种改进后的模型能够比传统模型更精确地描述路面实际状况.

Research on improved model of expressway flow control

The macroscopically dynamic traffic flow model describes the distribution of traffic flow a- long the road space. Thus it is mostly adopted in the present domestic flow control of the expressway. In fact, the state of vehicles has more frequent changes between the front 500 m of ring road in the outlet and the rear 500 m of ring road in the entry, and in other pavement the state of vehicles gener- ally becomes smooth. The macroscopical model usually deviate the reality in certain section. An im- proved traffic flow control model of expressway is developed on the basis of traditional macroscopical model in this paper. The model parameters were identified with the field data of the expressway. The results indicate that the improved model could describe the expressway' s actual status more accurately than the traditional model.