Abstract: There is only qualitative analysis for manage strategy of pedestrian crossing，and no quantitative analysis in the past.This article puts forwards the unsignalized pedestrian crossing delay model based on the safety of pedestrian.Take the situation when pedestrian delay is less than his extreme endurance time as the criterion，the range of vehicle volume for once cross and twice cross can be got if the width of road and pedestrian volume is definite.Finally，the best management for pedestrian crossing at roads is put forward，combined with the study of signalized sections.

Key words: traffic engineering, manage strategy, pedestrian delay, pedestrian “body”, twice cross street

摘要： 现行行人过街管理策略缺乏定量依据。提出无信号控制路段行人安全过街延误模型，在一定路宽、行人流量条件下，以行人延误小于其极限忍耐时间为判定标准，得出一、二次过街适合的机动车流量范围。最后，结合有信号路段的研究得出不同情况下路段行人过街最佳管理策略。

关键词: 交通工程, 管理策略, 行人延误, 行人“体”, 二次过街