Abstract: On the road section without signal control, pedestrian crossing behavior is an important factor that interferes with the normal driving of mixed traffic flow. Disturbed vehicles are usually accompanied by drivers' driving behaviors such as rapid acceleration and rapid deceleration, which will cause unnecessary increase in vehicle energy consumption. In this paper, aiming at the influence of pedestrians crossing the street on mixed traffic flow on the road section, the relationship between pedestrian crossing time and headway is analyzed, and the road safety is classified according to the results of road safety questionnaire survey, so that the safety analysis model of the road section without signal based on headway is put forward, and the feasibility of the model is verified by solving an example. The results show that the road safety analyzed by the model is in good agreement with the analysis results based on the headway distribution and the subjective safety feeling results of pedestrians crossing the street. With the improvement of road safety, the rapid acceleration and deceleration of mixed traffic flow are significantly reduced, which can provide some reference for the study of ecological driving concept under mixed traffic flow.

Key words: Vehicle headway; Unsignalized section; Pedestrian crossing behavior; Mixed traffic flow; Ecological driving

摘要： 在无信号控制的路段上，行人过街行为是干扰混合交通流正常行驶的一个重要因素。 受到干扰的行驶车辆通常伴随着驾驶员急加速、急减速等驾驶行为，会造成车辆行驶能耗的 不必要增加。文章针对无信号路段行人过街对路段上混合交通流行驶的影响，分析行人过街 时间与车头时距之间的关联，结合道路安全性问卷调查的结果对路段安全性进行分类，提出 基于车头时距的无信号路段安全性分析模型，并通过实例求解验证模型的可行性。结果表明， 模型分析的路段安全性与基于车头时距分布的分析结果和过街行人主观安全性感受结果较为 符合；随着路段安全性的提高，混合交通车流的急加速和急减速行为显著减少，可以为混合 交通流下的生态驾驶理念研究提供一定的参考。

关键词: 车头时距；无信号路段；行人过街行为；混合交通流；生态驾驶