交通流平衡“速-密”关系的宏观与微观特性
首发时间:2012-11-23
摘要:为探寻交通流平衡态"速-密"关系的特征,分别对南京市城市快速路和荷兰高速公路的宏观交通流数据以及20位个体驾驶者在南京市快速路上行车的微观跟驰数据进行了采集,基于宏观和微观交通流数据,研究了平衡态交通流宏观"速度-密度"以及微观"速度-间距"的关系,发现平衡态数据在相图上的分布具有明显的二维散布特性,提出了应用上下边界函数描述平衡态"速-密"关系的方法,且当上边界为全局凸函数,下边界为带拐点的S形函数时与实测数据吻合程度好。
For information in English, please click here
Macroscopic and microscopic features of the equilibrium speed - density relationship in traffic flow
Abstract:In this paper the macroscopic data of traffic flow in Nanjing expressway and Dutch motorways as well as the microscopic car-following data of 20 individual drivers were collected in order to explore the features of the equilbrium 'speed - density' relation. Both the macroscopic speed - density relationship and the microscopic speed - spacing relationship were studied based on the collected data. It is found that the equilibrium data scatter on the traffic phase plot instead of falling on a single curve. A functional region including the upper bound curve and the lower bound curve is proposed to describe such equilibrium speed - density relation. It seems that the best functions for the upper bound curve and the lower bound curve are the global convex function and the S - shape function respectively.
Keywords: Traffic engineering traffic flow speed-density relationship
论文图表:
引用
No.****
同行评议
共计0人参与
勘误表
交通流平衡“速-密”关系的宏观与微观特性
评论
全部评论0/1000