Abstract:

The rational setting length of the driving fatigue arousal section in a tunnel is studied to reduce the driving safety risk caused by driver fatigue in a tunnel′s middle section. First, consider the interaction between the amount of stimulation in the fatigue arousal section, the driver′s fatigue arousal degree, and the driver′s fatigue arousal maintenance time after fatigue arousal has been established. Second, static arousal tests are performed using 45 test scenarios that include three colors (blue, purple, and cyan), three brightnesses, and five stimulation durations. The law of arousal degree of drivers after roused in fatigue arousal sections with different stimulus quantities is investigated, and a correlation model between stimulus quantity and arousal degree is established, yielding a minimum stimulation quantity setting in the fatigue arousal section of no less than 8.84 cd·s/m2. Third, the arousal maintenance time of drivers after stimulation in the arousal section with different stimulus quantities is investigated, and a correlation model between stimulation quantity and arousal maintenance time under various operating speeds is established. Based on the maximum brightness of the tunnel fatigue arousal section that can be set on the sidewall at different speeds, the reasonable length of the fatigue arousal section in the tunnel at different speeds is obtained. Finally, when the design speed is 60, 80, and 100 km/h, the lengths of the driving fatigue arousal section at [WT《TNR#I》]x[WT《TNR》]([WT《TNR#I》]x ∈ ［1, N[WT《TNR》]-1］) are 160 m, 200 m, and 220 m, respectively; the lengths of the last driving fatigue arousal section should meet the normal driving of the remaining sections and should not be less than 65 m, 80 m, and 90 m.

Key words: long tunnel, driving fatigue, tunnel middle section, arousal degree, length of driving fatigue arousal section