【作者】 唐铁桥； 黄海军；

【Author】 Tang Tieqiao, Huang haijun(School of Economics and Management, Beihang University, Beijing 100083)

【机构】 北京航空航天大学经济管理学院；

【摘要】 目前单车道交通流动力学模型已经有很多了,这些模型都能够很好地再现一些复杂的交通流现象。而采用两车道交通流动力学模型来研究两车道交通流问题就非常少,更不用说提出两车道双向交通流动力学模型并用来分析两车道双向交通流问题了。本文从跟车理论出发,应用Liu提出的交通流微观和宏观参量之间的关系。将跟车模型中的所以微观变量转换成宏观变量,从而建立了一个两车道双向交通流动力学模型。与已有的交通流动力学模型相比较,该模型不存在大于宏观车流速度的特征速度,而且也不会出现车辆倒退现象。由于建立模型时综合考虑了跟车过程中的多种因素,因而物理上它更符合实际交通情况。数值计算表明,该模型可以很好地模拟冲击波的聚积和稀疏波的消散现象。更多还原

【Abstract】 There are so far many dynamics models for single lane traffic flow, which can show some complicated traffic phenomena. However, very few dynamics models are used to study two - lane traffic flow, say nothing of that no dynamics models are proposed to analyze two - lane bidirectional traffic flow. Based on the car - following theory, by using the relationships between traffic micro and macro variables presented by Liu and changing the micro variables into macros ones, a dynamics model for two - lane bidirectional traffic flow is proposed. The model produces neither a characteristic speed lager than the mean speed nor backward travel phenomenon, and it is regarded as more closely reflecting real traffic as multiple factors are taken into account when modeling the car- following. Numerical results show that the model can correctly simulate how shock waves accumulate and how rarefaction waves dissipate.更多还原