摘要
冲击波剖面模型是动态追踪交叉口排队和队列消散过程的一种模型,对其建模过程进行了改进,使其更符合实际交通流的运行情况。在此基础上,对含有5个信号交叉口的干线进行了数值仿真,在不断改变其交通需求的情况下,得到了干线输出流量和干线内累积车辆数的值。研究发现:干线输出流量和干线内累积车辆数存在一定的固定关系,从而验证了宏观基本图的存在性,为后续宏观基本图的研究和应用提供了一种快速准确的方法和一定的理论基础。
Shockwave profile model is a model that can dynamically track the process of queue build-up and dissipation at intersection. The modeling process is improved to make it more consistent with the actual operation of traffic flow. On this basis,a numerical simulation to an arterial road which contains 5 signal intersections is conducted,the output traffic volume and the cumulative number of vehicles in the arterial road when changing the traffic demand are obtained. It is found that there is existence of certain relationship between the abovementioned 2 parameters,which verified the existence of macroscopic fundamental diagram.It provided a fast accurate method and a certain theoretical basis for further study and application of MFD.
出处
《公路交通科技》
CAS
CSCD
北大核心
2016年第4期127-133,共7页
Journal of Highway and Transportation Research and Development
基金
国家自然科学基金项目(51278455)
关键词
交通工程
宏观基本图
数值仿真
SPM
干线
traffic engineering
macroscopic fundamental diagram（MFD）
numerical simulation
shockwave profile model（SPM）
arterial
numerical simulation
