摘要
为探究换道前跟驰行为对快速路互通交织区交通安全的影响,提出一种车辆换道前跟驰行为的交通安全风险评估方法,分析了换道前跟驰行为在快速路互通交织区内的风险分布特征。通过航拍视频获取快速路互通交织区车行轨迹数据,选用替代安全指标筛选冲突事件并划分瞬时交通安全风险等级。综合冲突严重度和发生概率,提出车辆换道前跟驰行为风险度的计算方法,并对车辆换道前跟驰行为全过程的整体风险进行评估。研究结果表明:(1)车辆换道前跟驰行为的瞬时风险主要发生于当前车辆与前车之间,占所有风险事件数量的71.74%;(2)跟驰行驶距离和跟驰持续时间与换道前跟驰行为的整体安全风险无显著线性关系,但当跟驰行驶距离小于10 m或跟驰持续时间小于1 s时,高风险车辆的占比超过10%;(3)在城市快速路互通交织区内,换道前跟驰行为的高风险区域主要位于主辅路相邻的车道上,且越靠近交织段起点,区域的交通安全风险越高。
Lane-changing behavior is a key factor affecting traffic safety in the crossing sections.Lane-changing decisions are usually made during the process of car-following.To investigate the impact of car-following behavior before lane-changing on traffic safety in urban expressway interchange(UEI)areas,this paper proposes a traffic safety risk assessment method for vehicles pre-lane-change car-following behavior.The risk distribution characteristics of vehicles following before lane changing in UEI area are analyzed.The vehicle trajectory data in the UEI weaving areas are obtained from aerial video.Then,conflict events are screened by surrogate safety measures and the instantaneous traffic safety risk levels are classified.By integrating the severity and probability of risk events,a risk degree calculation method for pre-lane-change car-following behavior is developed and the overall risk of car-following behavior pre-lane-changing is evaluated.Results indicate the instantaneous risk in car-following behavior before lane-changing mainly occurs between the subject vehicle and its leading vehicle,accounting for 71.74%of the number of all risks.There is no significant linear relationship between car-following distance or duration and the overall safety risk of car-following behavior before lane-changing.However,when the car-following distance is less than 10 m or the car-following duration is less than 1s,the proportion of high-risk vehicles exceeds 10%.High-risk regions of pre-lane-change car-following behavior primarily lie in lanes adjacent to the main and auxiliary roads.The beginning of the interchange sections causes higher traffic safety risks.
作者
赵顗
赵思雨
苑仁腾
赵楚玮
ZHAO Yi;ZHAO Siyu;YUAN Renteng;ZHAO Chuwei(College of Automobile and Traffic Engineering,Nanjing Forestry University,Nanjing 210037,China)
出处
《重庆理工大学学报(自然科学)》
北大核心
2026年第1期10-17,共8页
Journal of Chongqing University of Technology:Natural Science
基金
国家自然科学基金项目(62303228)
教育部人文社会科学研究项目(23YJC630253)
江苏省高等学校基础科学(自然科学)研究面上项目(25KJB580011)。
关键词
交通安全
交通安全风险评估
聚类算法
替代安全指标
换道前跟驰行为
互通交织区
traffic safety
traffic safety risk assessment
cluster algorithm
surrogate safety measure
car-following behavior before lane-changing
interchange weaving area
