北京市主干路基本路段交通流特性及状态分析

基于实测数据和交通流模型，对北京市的主干路基本路段的交通流进行了分析，发现主干路交通流呈现出不同的相位特征，应用“三相交通流理论”，在城市主干路基本路段的流量一密度平面中将交通流划分自由流、同步流和堵塞流3个相位，并具体讨论各个相位的交通流特性及交通流的状态转变，确定了各个相位的关键阈值，标定每个相位的区域范围，同时定义了城市主干路基本路段交通拥挤的范围，并用分类与回归树（CART）方法对结果进行了验证。

Analysis of Traffic Flow Characteristics and States of Urban Arterial Street in Beijing

Based on the data collected from urban arterial in Beijing and the traffic flow model,this paper analyzed the urban arterial street basic segment traffic,and found out that there are some different phase features in the urban arterial street basic segment.Based on "three-phase traffic theory",three phases including free flow,synchronized flow and jam were identified in flow rate-density plane of traffic flow.Then,the features and transitions of three phases were discussed.The functions of phase boundaries a...