考虑粘滞与压缩特性的改进宏观交通流模型研究

A Study on Improved Macroscopic Traffic Flow Model Considering Viscosity and Compressive Properties

通过详细分析交通流的压缩特性及粘滞特性,建立了一个新的考虑粘滞与压缩特性的改进宏观交通流模型,并利用迎风格式对改进的宏观交通流模型进行了求解。通过C++语言建立交通系统多分辨率仿真平台并实现了该模型。最后,通过仿真案例对实际检测数据与模型的物理特性进行了对比分析,仿真结果表明:该改进宏观模型的结果符合经典的流量、密度与速度曲线规律与实际场景应用情况,具有很高的理论及应用价值。

The paper proposes an improved macroscopic traffic flow model after analyzing viscosity and compressive properties of traffic flow in detail. It solves the macroscopic traffic flow model by using the upwind scheme. The improved macroscopic traffic flow model is implemented on multi-resolution traf- fic simulation platform in C ＋ ＋. Finally, a simulation scenario has been built to compare and analyze the physical characteristics of improved macroscopic traffic flow model and the actual testing data. The simu- lation results show that the improved macroscopic traffic flow model is accordance with the classical rela- tionship between the flow, density and speed. And it has the very high value of theory and application.