平面信号控制交叉口行人过街的时间模型

Pedestrian Crossing Time Models at Plane Signalized Intersections

平面信号控制交叉口行人过街时间是道路交通安全和交通信号设置的重要参数。通过对成都市6个无左转专用信号的平面信号控制交叉口的24条人行横道上行人过街时间的调查与分析,利用统计学得到平面信号控制交叉口行人过街平均时间模型、85%位时间模型和90%位时间模型,最后根据最小二乘法对所选的主要影响因素与各个多元线性回归模型进行相关性检验,结果证明所选的这些因素正是无左转专用信号的平面交叉口行人过街时间的主要影响因素。模型的建立为无左转专用信号的平面信号交叉口信号配时方案中最短绿灯时间的设定及其优化提供理论依据。

Pedestrian crossing time at a plane signalized intersection is an important parameter in traffic safety analysis and traffic signal design. Through measuring and analyzing the pedestrian crossing time of their 24 crosswalks at 6 signalized intersections without dedicated left turn signal in Chengdu, an average pedestrian crossing time model, 85 per cent time model and 90 per cent time model were developed with statistics. Finally, according to the least square method, a correlation test between the selected main factors and each of the various multiple linear regression equation was made and these selectedfactors were proved to be the main factors influencing the pedestrian crossing time at a plane signalized intersection without dedicated left turn signal. Establishment of the models supplied a theoretic basis for the minimum green time design and its optimization for this intersection.