交通信息与安全2024，Vol.42Issue(2)：147-157,11.DOI:10.3963/j.jssn.1674-4861.2024.02.015
高速公路小净距互通立交车辆纵向运行特性
Longitudinal Operational Characteristics of Cars between Small-spacing Interchanges on Freeway
摘要
Abstract
To clarify vehicles'characteristics of longitudinal operation between small-spacing interchanges(SSI)on freeways,a field test with 38 subjects is conducted at Baiyanggou Interchange and Paomaping Interchange in the Chongqing section of the G50 Shanghai-Chongqing Freeway.The onboard instruments collected operational data such as speed and longitudinal acceleration under natural-driving state.Then,the speed range,speed bandwidth,and aggregation coefficient are calculated to analyze the constraints of driving behavior and the characteristics of speed change.Finally,the cumulative frequency,probability distribution,and percentile values are investigated after ex-tracting the peak value of each waveform of the longitudinal acceleration curve.The findings are as follows:In the SSI section,the merging and diverging zones tend to overlap,leading to a great degree of vehicle weaving and inter-ference.Consequently,these areas are marked by a more significant difference of vehicle speed and a heightened de-gree of dispersion.The cross-sectional velocities typically exhibit a skewed distribution,with the speed range in the SSI being greater than that in other sections.Similarly,the longitudinal acceleration generally displays a skewed dis-tribution,wherein the interval of acceleration negative value exceeds that of positive value.Traffic conditions in the SSI are notably complex,necessitating careful maneuver by drivers.Comparing to the normal-spacing interchanges,the average acceleration decreases by 0.28 m/s2 in SSI.In the process of merging,drivers exhibit variability in their preferences for acceleration,with a notable inclination towards higher acceleration positive value(0.542 m/s2)and lower acceleration negative value(-0.081 m/s2).Contrarily,in the process of exiting,drivers demonstrate a certain level of uniformity in their choice of acceleration rates,with minor disparities between the acceleration positive val-ue(0.300 m/s2)and negative value(-0.350 m/s2)rates.Male drivers engage in longitudinal maneuver with a higher frequency than female drivers,albeit at a lower amplitude.Across different driving styles,a certain level of unifor-mity is observed in the trend of longitudinal acceleration changes.关键词
交通工程/小净距立交/驾驶行为/高速公路/行驶速度/加速度Key words
traffic engineering/small-spacing interchange/driving behavior/expressway/speed/acceleration分类
交通工程引用本文复制引用
王延鹏,张杰,潘存书,陈正欢,徐进..高速公路小净距互通立交车辆纵向运行特性[J].交通信息与安全,2024,42(2):147-157,11.基金项目
国家自然科学基金面上项目(52172340)资助 （52172340）
