Volume 39 Issue 4
Aug.  2021
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Article Navigation >  Journal of Transport Information and Safety  > 2021  >  39(4): 35-42
WU Yanxia, LIU Jian, HUANG Shuai, QIAO Jian-gang. Influences of Longitudinal Slopes of Highways on Drivers' Heart Rate and Driving Speeds on Rainy Days[J]. Journal of Transport Information and Safety, 2021, 39(4): 35-42. doi: 10.3963/j.jssn.1674-4861.2021.04.005
Citation: WU Yanxia, LIU Jian, HUANG Shuai, QIAO Jian-gang. Influences of Longitudinal Slopes of Highways on Drivers' Heart Rate and Driving Speeds on Rainy Days[J]. Journal of Transport Information and Safety, 2021, 39(4): 35-42. doi: 10.3963/j.jssn.1674-4861.2021.04.005
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Influences of Longitudinal Slopes of Highways on Drivers' Heart Rate and Driving Speeds on Rainy Days

doi: 10.3963/j.jssn.1674-4861.2021.04.005
  • 1.

    School of Civil and Transportation, Hebei University of Technology, Tianjin 300401, China

  • 2.

    Tianjin Research Institute of Transportation Science, Tianjin 300074, China

  • 3.

    Zhong Dian Jian Ji Jiao Expressway Investment development Co., Ltd., Shijiazhuang 050000, China

  • Received Date: 2020-06-17
    Abstract
  • The quantitative relationships between longitudinal gradients and driving speeds and those between longitudinal gradients and drivers' heart rate growth rate(HRGR)are studied under sunny and rainy weather. Basic data is collected through a field driving test to extract feature parameters for data fusion. Other factors are unchanged to compare similarities and differences between the vehicle speeds and the drivers' HRGR on sunny and rainy days. Based on these, this study feature points of the longitudinal slope section are determined. Four quantitative models are established by analyzing the performance rules of drivers' HRGR and driving speeds on sunny and rainy days. These four models are the relationships between driving speeds and slope gradients on sunny and rainy days and those between drivers' HRGR and slope gradients. The results show that under the same road conditions, the change trends of drivers' HRGR and driving speeds on sunny and rainy days are the same. However, the drivers' HRGR on rainy days changes more greatly, with more deceleration. With the increased gradient range [1.0, 4.0%], the drivers' HRGR satisfy the exponential growth model in the downhill section and the logarithmic growth model in the uphill section. The driving speeds show a negative exponential decline in the uphill section. In the downhill section, the driving speeds satisfy the exponential growth on sunny days. On rainy days, the quadratic polynomial of the relationship first increases and then decreases.

     

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