摘要
为了合理设计快速路合流区主线车道宽度,提高车辆运行安全性,提出了一种合流区主线车道宽度调整方法.首先,基于实测的平均速度和速度标准差数据,结合已有相关研究和车道宽度理论模型,运用统计学方法分别构建了内侧和中间两车道的车道宽度-事故率模型;然后,采用K-均值聚类法分别确定了内侧和中间车道的安全阈值,从而确定了车道宽度调整方法;最后,结合控制变量法分析了车道宽度为5.0 m和车身宽度为2.5 m两种案例.结果表明:在合理限速范围内,车道宽度随着速度增大而增大,车身宽度随着速度增大而减小,且当车身宽度分别不超过3.0 m和3.5 m时,对应的内侧车道和中间车道的安全性相对较高.
In order to design the main lane width of expressway confluence area and improve vehicles travelling safety,a method of adjusting the main lane width in confluence area was proposed. Firstly, based on the measured average velocity and velocity standard deviation data,combined with the existing research and theoretical model of lane width,lane width-accident rate models of inner lane and middle lane were constructed by using statistical methods.Then,safety thresholds of inner lane and middle lane were determined by K-means clustering method, and the method of adjusting the main lane width was determined. Finally,combined with the control variable method,two cases of lane width 5.0 m and body width 2.5 m were analyzed.Results show that within reasonable speed limit, lane width increases with the increase of speed, body width decreases with the increase of speed,and when the body width does not exceed 3.0 m and 3.5 m respectively,the safety of the corresponding inner lane and middle lane is relatively high.
作者
张鑫
张卫华
ZHANG Xin;ZHANG Weihua(School of Automation,Nanjing University of Science and Technology,Nanjing 210094,China;School of Automotive and Transportation Engineering,Hefei University of Technology,Hefei 230009,China)
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2021年第6期26-30,共5页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(51878236)
合肥市重点工程建设管理局科研项目(2019FFCJ4364)。
关键词
交通工程
车道宽度
交通事故
交通安全
控制变量法
traffic engineering
lane width
traffic accident
traffic safety
control variable
