Research on visual load at entrance area of extra-long tunnel in different periods

doi:10.16265/j.cnki.issn 1003-3033.2021.06.023

Abstract

Abstract: In order to study drivers' visual load when driving at tunnel entrances at different periods, real vehicle experiment was carried out at noon, dusk and night respectively in extra-long tunnels in Guizhou Province. Change rate of pupil area and frequency-weighted velocity of instantaneous pupil area were selected asevaluation indexes for the area's changes, and visual load of access zones, threshold zones and transition zones of entrance areas was analyzed. The results show that in the midday and evening, drivers' pupil area has no obvious change in access zones, but increases rapidly in threshold zones, and tends to be stable in transition zones. The distance between stable point of pupil area and portal in the midday period is longer than that in the evening. Visual load in different zones can be evaluated based on velocity of instantaneous pupil area, and it ranks as noon transition zone> noon threshold zone > night access zone ≈ night threshold zone ≈ night transition zone > noon access zone > evening transition zone> evening transition zone > evening access zone. In entrance areas, variation of drivers' visual load at different periods is more significant than that in different zones.

Key words: different periods, extra-long tunnel, entrance area, visual load, pupil area

CLC Number:

X910

MEI Jialin, DU Zhigang, ZHENG Haoran, XU Fuqiang. Research on visual load at entrance area of extra-long tunnel in different periods[J]. China Safety Science Journal, 2021, 31(6): 176-181.

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