Volume 41 Issue 2
Apr.  2023
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Article Navigation >  Journal of Transport Information and Safety  > 2023  >  41(2): 50-58
PAN Fuquan, YANG Jingzhou, ZHANG Lixia, LI Weicong, YANG Xiaoxia, BING Qichun. Influence of Horizontal and Vertical Alignments of Undersea Tunnel on Driver's Visual Characteristics and Vehicle Speed[J]. Journal of Transport Information and Safety, 2023, 41(2): 50-58. doi: 10.3963/j.jssn.1674-4861.2023.02.005
Citation: PAN Fuquan, YANG Jingzhou, ZHANG Lixia, LI Weicong, YANG Xiaoxia, BING Qichun. Influence of Horizontal and Vertical Alignments of Undersea Tunnel on Driver's Visual Characteristics and Vehicle Speed[J]. Journal of Transport Information and Safety, 2023, 41(2): 50-58. doi: 10.3963/j.jssn.1674-4861.2023.02.005
shu

Influence of Horizontal and Vertical Alignments of Undersea Tunnel on Driver's Visual Characteristics and Vehicle Speed

doi: 10.3963/j.jssn.1674-4861.2023.02.005

  • School of Civil Engineering, Qingdao University of Technology, Qingdao 266520, Shandong, China

  • Received Date: 2022-09-01
    Available Online: 2023-06-19
    Abstract
  • The combination of horizontal and vertical alignments of the undersea tunnel is complex and diverse, which can easily lead to adverse reactions such as distraction and fatigue for drivers. To this end, the data of 30 drivers are collected to quantify and analyze the effect of the cross-harbor tunnel flat and longitudinal alignment on drivers' visual characteristics and vehicle speed. The Facelab eye tracker, GPS X10 vehicle-mounted inclinometer, tachograph, and other equipment are used to collect the drivers' blink frequency, percentage of eye closure over the pupil per unit time (PERCLOS), tunnel slope, vehicle speed, and other data. The correlation and significance between the slope and curvature of the undersea tunnel and the drivers' blink frequency, PERCLOS, and vehicle speed are analyzed using partial correlation analysis. Then, Ploy 2D nonlinear surface fitting is used to establish mathematical models of blink frequency, PERCLOS, and vehicle speed with slope curvature. The relationship between blink frequency, PERCLOS, vehicle speed, and the horizontal and vertical alignments of the undersea tunnel is quantitatively analyzed, thus reflecting the influence of different combinations of horizontal and vertical alignments of the undersea tunnel on the driver's mental state and driving condition. Study results indicate that: Under the combination of a slope of 1.3% and the radius of the circular curve of 4 348 m, the drivers' blink frequency is highest, and their mental state is most relaxed. The driver's tension will be increased by appropriately increasing the positive slope and decreasing the curvature radius. Under the combination of a slope of 3.05% and the radius of the circular curve of 3 521 m, the drivers' PERCLOS is the largest and the fatigue degree is the highest. By appropriately increasing the negative slope and reducing the curvature radius the driver's tension will be relieved. Under the combination of a slope of 1.78% and the radius of the circular curve of 2 433 m, the vehicle speed is found to be the highest. The vehicle's speed will be reduced by appropriately increasing the positive slope and curvature radius. The constructed visual characteristics and speed model can reflect the changes in the driver's mental state and driving condition with the changes in horizontal and vertical alignments, which shall provide theoretical support for the horizontal and vertical alignments' safe design and operation management of the undersea tunnel.

     

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