Impact of Urban Undersea Tunnel Longitudinal Slope on the Visual Characteristics of Drivers

Figure 2

The box plot of the average fixation time and visual lobe of drivers under different longitudinal slopes in the uphill and downhill sections. (a) The average fixation time under different longitudinal slopes in the uphill section, (b) the average fixation time under different longitudinal slopes in the downhill section, (c) the visual lobe under different longitudinal slopes in the uphill section, and (d) the visual lobe under different longitudinal slopes in the downhill section.

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(b)

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