异质交通流分布已知条件下的车队离散模型

Heterogeneous Platoon Dispersion Model Under Known Heterogeneous Traffic Flow Distribution

公路智能交通信号控制中车队离散规律是最为重要的理论基础,为对异质交通流环境下的车队离散情况做出更加合理的描述,本研究依据Robertson模型的相关理论方法研究了已知异质交通流分布条件下的车队离散模型,通过VISSIM仿真数据,分析了上、下游交叉口流率随时间转换之间的关系,将结果与原始的Robertson模型计算结果进行比较.结果表明:在已知异质交通流分布的条件下,本文模型预测的下游交叉口流率能更好的表达异质特性,预测均方误差减少7.78%.

In intelligent signal coordination control system,the rule of description is the most important theoretical foundation.In order to make more reasonable description of heterogeneous flow feature,this paper combines the relevant theory of Robertson model to propose a heterogeneous platoon dispersion model with known heterogeneous traffic flow distribution conditions.Through VISSIM simulation data,the transformation of the flow rate of the downstream and the flow rate of the upstream is analyzed.Comparing with the data calculated by Robertson model,the results show that,under the condition of known heterogeneous traffic flow distribution,the downstream intersection flow rate obtained by proposed model can better express the law of dispersion caused by traffic flow heterogeneity,and the MSE is reduced by 7.78%.