成都市无信号交叉口行人过街临界间隙分布研究

Study on the Critical Gap Distribution of Pedestrian Crossing at Unsignalized Intersections of Chengdu

行人交通是城市交通系统的薄弱环节,尤其是通过无信号控制的交叉口时容易受到机动车威胁,因此研究行人过街特性具有重要意义。本文基于宏观概率平衡的方法研究临界间隙的概率分布函数,该方法通过采集交叉口行人过街时的接受间隙和拒绝间隙,估计行人过街的临界间隙分布。并以成都市典型无信号交叉口为例,得出了行人过街的临界间隙的均值、方差和分布图。最后,通过现场观察和数据分析,对该交叉口和路段的改善提出建议。

It is of great significance to study pedestrian crossing characteristics because pedestrian traffic is a weak link of the urban transport system usually facing with the threat of motor vehicles, especially at an unsignalized intersection. In this paper, the critical gap distribution of pedestrian crossing was studied based on the macro probability balance method,and the critical gap was estimated using the refused and accepted gap data of pedestrian crossing collected at the unsignalized intersections of Chengdu. Then, taking a Chengdu typical case as an example,the mean, variance and distribution of the critical gap could be gotten with the data collected at a unsignalized intersection. Finally, the suggestions improving the intersection and road were put forward by site observation＆amp;nbsp;and data analysis.