摘要
研究能够满足出口车速平稳过渡的逐级限速方案,对出口区域车辆平稳运行及安全提升有重要意义。利用无人机采集高速公路出口车辆运行参数,分析出口车辆运行特征,考虑驾驶员对相邻限速标志的认知反应,构建了连续限速标志设置间距计算模型,建立了高速公路出口不同级别的限速方案,利用驾驶模拟试验对设计的不同限速方案进行分析及评价。模型的计算结果显示,二级限速方案中,限速值为60-40 km/h的限速标志间距为160 m;三级限速方案中,限速值为80-60-40 km/h的限速标志间距分别为300 m和80 m,限速值为90-60-40 km/h的限速标志间距分别为300 m和85 m;四级限速方案中,限速值为100-80-60-40 km/h的限速标志间距分别为295、160、80 m。利用驾驶模拟器对模型结果进行验证,试验结果表明:随着限速级数增加,车辆离散幅度显著降低,表明逐级限速方案对出口车辆运行速度有明显管控效果;逐级限速方案的平均减速度指标小于1.3 m/s^(2),均在驾驶舒适性阈值内;四级限速方案可使在分流鼻端车速标准差、平均减速度、分流鼻运行速度V85分别控制在5.23 km/h、0.52 m/s^(2)、54 km/h左右,极大满足了车速平稳过渡要求。可见,借助模型定量优化的逐级限速方案可以显著提高出口车速过渡的平稳性和安全性。
The study of the grade-by-grade speed limit scheme that can meet the smooth transition of exit vehicle speed is of great significance to the smooth operation and safety enhancement of vehicles in the exit area.The unmanned aerial vehicle was used to collect the vehicle operation parameters of the highway exit,analyze the exit vehicle operation characteristics,consider the driver's cognitive response to the adjacent speed limit signs,construct a continuous speed limit sign setting spacing calculation model,establish different levels of speed limit schemes for the highway exit,and analyze and evaluate the designed different speed limit schemes by using driving simulation tests.The calculation results of the model show that the calculation results of the model show that the spacing of speed limit signs for 60-40 km/h is 160 m secondary speed limit scheme.The spacing of speed limit signs for 80-60-40 km/h is 300 m and 80 m in three level speed limit scheme,and the spacing of speed limit signs for 90-60-40 km/h is 300 m and 85 m,respectively.The spacing of speed limit signs for 100-80-60-40 km/h is 295,160 and 80 m in four level speed limit scheme.The model results were verified using a driving simulator,and the test results show that with the increase of the speed limit level,the vehicle dispersion amplitude decreases significantly,which indicates that the speed limit level by level scheme has obvious control effect on the exit vehicle running speed.The average deceleration index of the speed limit level by level scheme is less than 1.3 m/s^(2),which is all within the driving comfort.The four-level speed limit scheme can make the standard deviation of vehicle speed,average deceleration speed and shunt nose operating speed V 85 controlled at 5.23 km/h,0.52 m/s^(2) and 54 km/h respectively,which greatly meets the requirements of smooth transition of vehicle speed.It can be seen that the step-by-step speed limit scheme can significantly improve the smoothness and safety of the exit speed transition with the help of the
作者
徐婷
胡闪闪
陈亦新
芮飞
马金凤
XU Ting;HU Shan-shan;CHEN Yi-xin;RUI Fei;MA Jin-feng(School of Transportation Engineering,Chang'an University,Xi'an 710064,China)
出处
《科学技术与工程》
北大核心
2024年第1期386-396,共11页
Science Technology and Engineering
基金
国家自然科学基金(52002033)
长安大学中央高校基本科研业务费专项资金资助(300102343205)
长安大学中央高校基本科研业务费专项资金资助(300102342101)。
关键词
交通安全
高速公路出口
逐级限速方案
连续限速标志间距计算模型
traffic safety
motorway exits
step by step speed limit scheme
continuous speed limit sign spacing calculation model
