重庆理工大学学报2026，Vol.40Issue(1)：10-17,8.DOI:10.3969/j.issn.1674-8425(z).2026.01.002
快速路互通交织区换道前跟驰行为交通安全风险评估
Traffic safety risk assessment of car-following behavior before lane-changing in expressway interchange weaving area
摘要
Abstract
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.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Key words
traffic safety/traffic safety risk assessment/cluster algorithm/surrogate safety measure/car-following behavior before lane-changing/interchange weaving area分类
交通工程引用本文复制引用
赵顗,赵思雨,苑仁腾,赵楚玮..快速路互通交织区换道前跟驰行为交通安全风险评估[J].重庆理工大学学报,2026,40(1):10-17,8.基金项目
国家自然科学基金项目(62303228) （62303228）
教育部人文社会科学研究项目(23YJC630253) （23YJC630253）
江苏省高等学校基础科学(自然科学)研究面上项目(25KJB580011) （自然科学）
