论文部分内容阅读
为了分析机动车绿灯倒计时对交叉口交通安全的潜在影响,通过实际调查,对有无机动车绿灯倒计时的交叉口驾驶行为进行了对比分析。利用视频,采集了停车线前35 m范围内车辆通过各检测线的时刻及相邻检测线间的车速。在对比交叉口上游路段平均车速以保证后续分析可比性的基础上,通过分布拟合及相关性分析,研究了绿灯倒计时对相位切换期间停车线处车速大小分布、车速空间分布、车辆通过停车线时刻分布以及两难区长度的影响。结果表明:设置机动车绿灯倒计时将导致黄灯期间通过停车线车辆车速增加30%;使交叉口进口道区域车速空间变化趋于平稳;对于黄灯启亮后通过停车线的车辆,闯红灯比例降低了90%;可显著缩短甚至消除两难区。
In order to analyze the potential impact of green light countdown on traffic safety at intersections, a practical survey was conducted to compare and analyze the driving behavior at intersections with or without green light countdown. Using the video, the time when the vehicle passed each detection line and the speed between adjacent detection lines within 35 m before the parking line was collected. Based on the comparison of the average speed of the upper reaches of the intersections to ensure the comparability of the follow-up analysis, the green light countdown was used to study the distribution of the speed and speed of the parking lines, the spatial distribution of the vehicle speed during the phase switching, The distribution of time and the impact of dilemma length. The results show that setting a green light countdown will result in an increase of 30% in vehicle speed through the parking lane during the yellow period, a steady change in the speed and space of the entrance lane at the intersection, and a decrease in the percentage of red lights passing through the parking lane after the yellow light turns on 90%; can significantly shorten or even eliminate the dilemma.