黄灯期间首停车及末行车行驶参数分析

摘要

黄灯期间首停车及末行车行驶参数直接决定着两难区范围,但相关文献十分稀少.为此,本文选择有无倒计时信号交叉口为视频观测点,采集黄灯期间首停车及末行车行驶参数(包括黄灯启亮时至停车线距离、速度、感知反应时间、减速度、进入时间、加速度),比较分析有无倒计时条件下上述行驶参数的描述统计值和拟合分布.结果表明,倒计时对首停车黄灯启亮时速度及感知反应时间和末行车黄灯启亮时至停车线距离及进入时间有显著影响;有无倒计时条件下黄灯期间首停车及末行车行驶参数的最佳拟合分布各异,这为两难区边界确定和黄灯期间车辆行驶行为模拟提供理论依据.%The first-to-stop and last-to-go vehicles during yellow interval are directly related to the range of the dilemma zone. Empirical analysis of the first-to-stop and last-to-go vehicles, however, is rare in literature. In this paper, the microscopic parameters of the first-to-stop and last-to-go vehicles are collected at real world signalized intersections, including the distance to stop line at the start of yellow time, speed at the start of yellow time, perception-reaction time, deceleration, entry time, and acceleration. Descriptive statistics and fitted probabilistic distributions are used to discuss the parameters for the scenarios with and without countdown signals. The results show that the presence of countdown signal not only affects the speed at the start of yellow time and perception-reaction time for the first-to-stop vehicles, but also significantly affects the distance to stop line at the start of yellow time and entry time for the last-to-go vehicles. Significant difference is found in the fitted distributions of the parameters under different scenarios. The findings from this study can provide theoretical basis of determining the range of dilemma zone and behavior analysis during the change interval.