Safety Evaluation of Illuminance Transition at Highway Tunnel Portals on Basis of Visual Load

Du, Zhigang; Huang, Faming; Pan, Xiaodong

doi:10.3141/2458-01

Cited by 28 publications

(14 citation statements)

References 10 publications

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“…Dong et al [21] revealed that LEDs with correlated color temperatures (CCTs) ranging from 4000 to 4500 K are preferable for tunnel entrance lighting. Zhi et al [22] evaluated the safety of illuminance transitions at highway tunnel portals on the basis of visual load. Zhou et al [23] simulated human visual perception under nighttime illuminance.…”

Section: Introductionmentioning

confidence: 99%

Simulating Human Visual Perception in Tunnel Portals

Liu

Wang

2021

Sustainability

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To study the characteristics of light and dark adaptation in tunnel portals, and to determine the influencing factors in light–dark vision adaptation, basic tunnel lighting and linear design data were obtained. In this study, we used a light-shielded tent to simulate the dark environment of a tunnel, observe the driver recognition time for target objects during the light–dark adaptation process, and analyze the light–dark adaptation time of human vision. Based on the experimental data, we examined the relationships between age, gender, illuminance, and light and dark adaptation times, and established a model for these relationships. The experimental results show that the dark adaptation time is generally longer than the light adaptation time. The dark adaptation time is positively related to age and exhibits a cubic relationship. There is no significant correlation between the light adaptation time and age, but the overall trend is for the light adaptation time to gradually increase with increasing age. There is no correlation between gender and light and dark adaptation times, but there is a notable correlation between light and dark adaptation times and illuminance. When the illuminance ranges from 11,000 to 13,000 lux, the light and dark adaptation times are the longest.

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Section: Introductionmentioning

confidence: 99%

Simulating Human Visual Perception in Tunnel Portals

Liu

Wang

2021

Sustainability

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“…L. Dong et al revealed that light-emitting diodes (LEDs) with correlated color temperatures (CCTs) ranging from 4000-4500 K are preferable for tunnel entrance lighting [21]. G. Zhi, et al evaluated the safety of illuminance transition at highway tunnel portals on basis of visual load [22].N. Zhou et al simulated human visual perception under nighttime illuminance [23].…”

Section: Introductionmentioning

confidence: 99%

Research on Light-Dark Adaptation of Human Vision in Tunnel Portals

Liu¹,

Wang²

2021

Preprint

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To study the characteristics of light and dark adaptation in tunnel portal sections and to determine the influencing factors of light-dark vision adaptation, basic tunnel lighting and linear design data are obtained. In this paper, we use a light-shielded tent to simulate the dark environment of a tunnel in experiments, observe the driver recognition time of target objects during the light-dark adaptation process, and analyze the light-dark adaptation time of human vision. Based on a large number of experimental data, we examined the relationship between age, gender, illuminance and light and dark adaptation times and established a model of the relationship between age, illuminance and light and dark adaptation times. The experimental results revealed that the dark adaptation time is generally longer than the light adaptation time. The dark adaptation time is positively related to age and basically exhibits a cubic relationship. There is no significant correlation between the light adaptation time and age, but the overall trend is that the light adaptation time gradually increases with increasing age. There is no correlation between gender and light and dark adaptation times, but there is a notable correlation between the light and dark adaptation times and illuminance. When the illuminance ranges from 11000-13000 lux, the light and dark adaptation times are the longest.

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“…Above existing studies primarily focus on the analysis of the characteristics of the drivers' eye movement such as the gaze, saccade, and pupil changes in highway tunnels [14,15] and urban tunnels [16,17]. Unfortunately, relevant studies on the drivers' visual characteristics in urban undersea tunnels is lacking at this stage.…”

Section: Introductionmentioning

confidence: 99%

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

Wang

Jiao

et al. 2020

Journal of Advanced Transportation

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This study aims to investigate the impact of the urban undersea tunnel longitudinal slope on the visual characteristics of drivers. 20 drivers were enrolled to conduct the real vehicle test of the urban undersea tunnel. First, the data of average fixation time and visual lobe were collected by an eye tracker. The differential significance was tested using the one-way repeated measures analysis of variance (ANOVA). Then, the difference between the up-and-down slope (direction) factor and the longitudinal slope (percent) factor on the two indexes were analyzed using the two-way repeated measures ANOVA. Second, by constructing a Lorentz model, the impact of the longitudinal slope on the average fixation time and the visual lobe were analyzed. Besides, a three-dimensional model of the longitudinal slope, average fixation time, and visual lobe was quantified. The results showed that the average fixation time and visual lobe under different longitudinal slopes markedly differed when driving on the uphill and downhill sections. The average fixation time and visual lobe under two factors were markedly different. Moreover, with an increase in the longitudinal slope, the average fixation time exhibited a trend of increasing first then decreasing; the visual lobe exhibited a trend of decreasing first and then increasing. The average fixation time reached the minimum and maximum value when the slope was 2.15% and 4.0%, whereas the visual lobe reached the maximum and minimum value when the slope was 2.88% and 4.0%. Overall, the longitudinal slope exerted a great impact on the visual load of the driver.

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Safety Evaluation of Illuminance Transition at Highway Tunnel Portals on Basis of Visual Load

Cited by 28 publications

References 10 publications

Simulating Human Visual Perception in Tunnel Portals

Simulating Human Visual Perception in Tunnel Portals

Research on Light-Dark Adaptation of Human Vision in Tunnel Portals

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

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