摘要
为确定高速公路改扩建借对向车道行驶时中央分隔带开口长度,首先基于连续反向圆曲线换道模型,考虑中央分隔带宽度、施工区限速、车道宽度3个因素,得到高速公路改扩建借对向车道行驶时中央分隔带开口长度理论值。然后基于驾驶模拟仿真实验,收集了20名驾驶员在中央分隔带宽度为3 m时,不同中央分隔带开口长度的数据。采用小波分析、单因素方差分析的方法,分析了车辆驶入对向车道过程的断面速度标准差、驾驶负荷、行车延误3个指标,分别评估不同中央分隔带开口长度下的行车稳定性、安全性和通行效率。结果表明:中央分隔带开口长度对行车稳定性、安全性和通行效率均有显著影响;合适的中央分隔带开口长度条件下,车辆的转向过程可以假定为匀速运动。当限速40 km/h时,中央分隔带开口长度80 m为宜;当限速60 km/h时,中央分隔带开口长度以110、130 m为宜。根据模拟实验结果,中央分隔带开口长度理论值的安全修正系数为1.4。后续研究将招募多种年龄、驾龄层次驾驶员继续进行自然室外实车实验对驾驶模拟实验结果进行进一步验证。
In order to determine the opening length of median separator on expressway in the reconstruction and extension period,based on the continuously reverse circular curve model,considering the median separator width,limit speed and lane width,the theoretical value for the opening length of the median separator on expressway in the reconstruction and extension period was figured out.Then,based on the driving simulation experiment,under the condition of 3 m width of the median separator,20 drivers driving behavior data were collected.Based on wavelet analysis and one-way analysis of variance,the standard deviation of section speed,driving load,and driving delay during the drivers entering the traffic transition zone were used to evaluate the driving stability,safety,and efficiency under different opening lengths of the median separator respectively.The result shows that the opening length of the median separator has a significant impact on driving stability,safety and efficiency.And the turning process of the vehicle can be assumed to be a uniform motion when entering a traffic transition zone with proper opening length of the median separator.It also illustrates that the opening length of 80 m and the opening length of 110、130 m are appropriate for the expressway in the reconstruction and extension period with speed limit of 40 km/h and 60 km/h respectively.Based on the results of driving simulation experiment,the safety correction factor of the theoretical value of the opening length of the median separator in the reconstruction and extension work zone area is 1.4.Future research will recruit more drivers with various ages and driving experience to carry out outdoor experiments with real driving environment to further verify the driving simulation experiment results.
作者
孙智
荆迪菲
李志勇
王豪
SUN Zhi;JING Difei;LI Zhiyong;WANG Hao(China State Construction Shandong Investment Co.,Ltd.,Ji nan,Shandong 250002,China;The Key Laboratory of Road and Traffic Engineering,Ministry of Education,Tongji University,Shanghai 201804,China;Hunan Communications Research Institute Co.,Ltd.,Changsha,Hunan 410015,China;China State Construction Port Engineering Group Co.,Ltd.,Qingdao,Shandong 266033,China)
出处
《公路工程》
2022年第6期113-120,196,共9页
Highway Engineering
基金
中建股份科技研发计划资助项目(CSCEC-2017-Z-20)
贵州省交通运输厅科技项目(2017-121-039)。
关键词
交通工程
高速公路改扩建
中央分隔带开口长度
交通安全
驾驶模拟
traffic engineering
reconstruction and extension of expressway
the opening length of median separator
traffic safety
driving simulation
