交通信息与安全2023，Vol.41Issue(6)：20-31,81,13.DOI:10.3963/j.jssn.1674-4861.2023.06.003
基于自然驾驶数据的高密度立交出入口车辆轨迹特征研究
An Investigation on Vehicle Trajectory Characteristics at Exit and Entrance of High-density Interchanges Based on Naturalistic Driving Data
摘要
Abstract
Interchange is an important node of the road traffic network,and as the spacing between neighboring in-terchanges continues to shrink,a high-density cluster of interchanges is gradually formed,which is prone to traffic congestion,increasing driving load and accident risk.To clarify the operational risks and safety hazards in the en-trance and exit sections of high-density interchanges,the field driving test is conducted on the Inner Ring Road of Chongqing.This test takes a cluster of high-density interchanges as the research object.Using onboard instruments,vehicle trajectory data are collected under natural driving conditions.The vehicle trajectory data includes speed,re-al-time driving position,and lateral distance between the vehicle center and the lane markings on both sides.By ana-lyzing the measured data,the vehicle trajectory pattern of the interchange entrances and exits as well as the relation-ship between the behavioral characteristics of lane selection and the influence of the driver's gender on the trajectory pattern are clarified.The lane-changing behavioral characteristics and driving risk influencing factors in the process of vehicles leaving(merging into)the mainline are explored.The results reveal the following conclusions:①The type of entrance or exit has a significant influence on lane selection and trajectory shape.Compared to parallel-type exits,direct-type exits have smoother trajectories and fewer lane changing numbers.②When entering and exiting two adjacent interchanges with a short clearance,drivers tend to choose the auxiliary lane or the outermost lane on the mainline to reduce the number of lane changing.③The number of mainline lanes near the entrance and exit af-fect drivers'lane selection behavior.④When drivers leave the mainline,the lane-changing duration of the paral-lel-type exit is higher than that of the direct-type exit.The entrance type does not have a significant impact on lane-changing time.The lane-changing time for 78%of drivers is between 5 to 10 seconds.⑤The operational risks in the exit section are higher than in the entrance section.It is recommended to use solid white lane line to prohibit crossing same-direction lane markings on the left side of the rightmost lane of the exit section.The length should cover from the beginning of the taper section to the diverging point,extending 50 meters forward from the start of the taper section.关键词
交通安全/高密度立交/自然驾驶数据/小净距立交/出入口/行驶轨迹Key words
traffic safety/high-density interchanges/naturalistic driving data/small spacing interchanges/inter-change entrance and exit/trajectory分类
交通工程引用本文复制引用
徐进,杨雪敏,张雪榆,张杰,孔繁星,矫成武..基于自然驾驶数据的高密度立交出入口车辆轨迹特征研究[J].交通信息与安全,2023,41(6):20-31,81,13.基金项目
国家自然科学基金面上项目(52172340)、重庆市高校创新研究群体项目(CXQT21022)资助 （52172340）
