城市道路交叉口当量人群运行特征

基于非机动车和行人通过交叉口时的交通流运行特征, 定义了当量人群的概念来描述非机动车和行人对机动车通行的共同影响。统计了高峰小时的当量人群数据, 考虑样本的稳定性、样本量的大小以及应用的便利性, 以15 min为分析时段, 采用回归分析的方法得到了当量人群的当量人数与当量人群的平均群时距和群个数之间的回归关系模型。分析结果表明: 当量人群的群时距符合移位负指数分布; 当量人群的平均群时距随着当量人数的增加而减小; 当量人群的群个数随着当量人数的增加表现出先增加后减小的趋势。

Running characteristics of equivalent people group at urban road intersection

Based on the running characteristics of non-motorized vehicles and pedestrians when they passed through intersection, equivalent people group was defined to describe its influence on vehicles.Considering sample stability, sample number and application convenience, the analysis period of 15 min was adopted, and equivalent people groups' data at peak hours were investigated.The correlation models among equivalent people number, average group time headway and group number were got by means of regression analysis.Analysis result indicates that the group time headway of equivalent people group is shifted negative exponential distribution, the average group time headway decreases with the increase of equivalent people number, and the group number firstly increases and then decreases with the increase of equivalent people number.