基于视觉指标的雾天高速公路限速值  

Expressway Speed Limit Value in Fog Based on Driver’s Visual Indicator

作　　者：何富勇 杨雅钧 张驰[3] 王世法 肖锋 HE Fu-yong;YANG Ya-jun;ZHANG Chi;WANG Shi-fa;XIAO Feng(Chengdu Branch of Sichuan Chengdu-Mianyang-Cangxi-Bazhong Expressway Construction&Development Group Co.,Ltd.,Chengdu,Sichuan 610000,China;Sichuan Communication Surveying&Design Institute Co.,Ltd.,Chengdu,Sichuan 610047,China;School of Highway,Chang’an University,Xi’an,Shaanxi 710064,China;Sichuan Yakang Expressway Co.,Ltd.,Yaan,Sichuan 625000,China;Sichuan Tibetan Area Expressway Co.,Ltd.,Chengdu,Sichuan 610047,China)

机构地区：[1]四川成绵苍巴高速公路有限责任公司成都分公司,四川成都610000 [2]四川省交通勘察设计研究院有限公司,四川成都610047 [3]长安大学公路学院,陕西西安710064 [4]四川雅康高速公路有限责任公司,四川雅安625000 [5]四川藏区高速公路有限责任公司,四川成都610047

出　　处：《公路交通科技》2024年第7期194-206,共13页Journal of Highway and Transportation Research and Development

基　　金：国家重点研发计划项目(2020YFC1512005,2021YFB2301602);四川省科技计划项目(2022YFG0048);四川省交通运输科技项目(2019-ZL-12,2022-ZL-04);四川藏区高速公路联合技术攻关专题(藏高科技2021-11)。

摘　　要：为解决雾天高速公路能见度降低和驾驶人视距受限的交通安全问题,提出了一种基于驾驶人视觉指标的限速控制方法。首先,对雾天高速公路行驶速度与驾驶人视觉的变化进行了分析,并确定了能综合表征路况信息和能见度水平的视觉指标;其次,通过UC-win/Road模拟了不同能见度下的驾驶环境,并收集了视觉指标和运行速度数据,进一步分析了雾天视觉指标的影响因素;然后,使用SPSS构建了运行速度和视觉指标间的数学模型,根据能见度与视觉指标间的线性关系提出了不同能见度下的视觉指标参考值;最后,基于能见度、交通流量、视觉指标3个因素,提出了一种考虑视觉指标的多条件限速控制标准。结果表明:在能见度低于200 m的环境下,视觉指标明显低于无雾环境下的视觉指标,降低范围在0.578%~1.407%之间;视觉指标与运行速度两变量间的相关系数达到0.863,这说明雾天能见度降低和视觉指标下降对行驶速度有显著影响;预测运行速度与实测速度的相对误差平均值为2.43%,满足预测精度要求。综上所述,本研究提出的限速控制方法同时考虑了能见度、交通流量和驾驶人视觉,对于保障雾天高速公路的安全行驶具有重要的实用价值。To solve the traffic safety problems caused by reduced visibility and limited visual range of drivers on expressway in fog,the speed limit control method based on driver's visual indicator was proposed.First of all,the expressway speed and driver's visual variation in fog were analyzed.The visual indicators were determined,which can synthetically represent road condition information and visibility level.Secondly,UC-win/Road was used to simulate the driving environment with different visibilities.The data of visual indicator and running speed were collected.The fog visual indicators of influencing factors were analyzed.Then,by using SPSS regression,the mathematical model of running speed and visual indicator was established.According to the linear relation between visibility and visual indication,the visual indicator reference values with different visibilities were given.Finally,based on the 3 factors of visibility,traffic flow and visual indication,the multi-condition speed limit control standard considering visual indication was proposed.The result indicates that the visual indicator of environment with visibility less than 200 m is obviously lower than that of the environment without fog,and the range of reduction is 0.578%-1.407%.The correlation coefficient between visual indication and running speed is 0.863.The decrease of visibility in fog has the significant effect on driving speed.The average relative error between predicted and measured speed is 2.43%,and the accuracy of predicted results meets the requirements.The speed limit control method for expressway in fog is presented in this study,which takes visibility,traffic flow and driver's vision into account.It is of great significance to ensure the expressway driving safety in fog.

关 键 词：交通工程 车速限制 驾驶仿真 雾天行车 驾驶人视觉 

分 类 号：U412[交通运输工程—道路与铁道工程]