高速公路动态交通流的建模与控制策略

DYNAMIC TRAFFIC FLOW MODELING AND CONTROL STRATEGY

  • 摘要: 从高速公路交通流的宏观、动态特性出发,首先给出了交通流控制和仿真中常用的宏观、动态、确定性交通流模型,并结合交通调查数据,利用仿真和优化技术对模型中的参数进行了辨识,从而获得了能比较准确地描述交通流真实行为的模型.然后提出了低密度区的可变速度控制,中密度区的可变限速和入口匝道联合控制及出口匝道分流和入口匝道协调(高密度区)控制模型,并给出了上述3个问题的最优解.最后利用计算机模拟了受控和未控交通流,其结果令人满意.

     

    Abstract: From the viewpoint of macro dynamic characteristics of freeway traffic flow, this paper first presents a commonly used macroscopic dynamic deterministic traffic flow model for traffic control and simulation. Byinteg ration traffic survey data with simulation assumption, it gives parameter identification and optimization of the model by using computer simulation and optimization techniques, so we obtain a model which is capable of describing real traffic flow dynamic behavior more precisely. Then it proposes avariable speed limit control, on-ramp control and off-ramp diversion control models with optimal solutions for low, moderate and high traffic density sections. Finally, traffic flow with and without control is simulated by computer with satisfactory results.

     

/

返回文章
返回