冰雪条件下城市道路路段车头时距

摘要

To grasp exactly the traffic flow characteristic of urban road under ice and snowfall conditions, headway distribution of different kinds of urban road was studied.Based on field observation, headway was processed and analyzed under different ice and snowfall conditions.Erlang distribution is used to fit the distribution of headway under different conditions, the validation shows that it is well fitted.It provides theory and data basis for research on the characteristic of traffic flow under ice and snowfall conditions.%为准确把握冰雪条件下城市道路交通流特性,研究城市不同类别道路的车头时距分布规律,在大量实地调查数据的基础上,对冰雪条件下,城市不同等级道路上的车头时距进行数据整理、分析.采用爱尔朗分布拟合不同条件下的车头时距分布,并进行检验.结果表明拟合效果良好.为冰雪条件下城市道路交通流特性研究提供理论及数据基础.