Effects of transient adaptation on drivers’ visual performance in road tunnel lighting

He, Shiyong; Tähkämö, Leena; Maksimainen, Mikko; Liang, Bo; Pan, Guobing; Halonen, Liisa

doi:10.1016/j.tust.2017.07.008

Cited by 29 publications

(13 citation statements)

References 12 publications

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“…Consequently, many studies tested the ability of subjects to detect a target appearing briefly in their peripheral visual field. Some of them focused on classic road lighting (Bullough and Rea 2000), while others were designed specifically to address the tunnel issue (He et al 2017). The results obtained for these two categories were consistent and showed that the visual performances of observers increased with the S/P ratio of the light sources.…”

Section: Previous Work On the Influence Of Spd On Visibility In Road mentioning

confidence: 59%

Impact of the Spectrum of Light on Visibility in Road Tunnels

Talon

Dumortier

Jost

et al. 2019

PROCEEDINGS OF the 29th Quadrennial Session of the CIE

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Our objective is to investigate the effect of the spectral content of light sources on visibility in road tunnels. This paper describes the psychophysical experiment that we developed for this investigation. We have built a 1:20 scale model of a tunnel equipped with 2 rows of 12 chips on board (COB) acting as luminaires. Each COB contains 7 different types of LED which are individually controlled to produce various spectral power distributions (SPD). We will focus on three SPD: one representative of high pressure sodium lamps (HPS) and two others representative of white LEDs at Correlated Colour Temperature (CCT) of 3 000 K and 5 000 K respectively. In order to determine whether or not melanopsin plays a role in visibility, three other spectra will be tested: each being metameric (same CCT and CRI) of one of the first three, while providing up two twice as much energy around 490 nm (the peak of melanopsin sensitivity). About 40 observers will compare the visibility of an on-axis target under the six spectra using a pairwise comparison procedure.

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Section: Previous Work On the Influence Of Spd On Visibility In Road mentioning

confidence: 59%

Impact of the Spectrum of Light on Visibility in Road Tunnels

Talon

Dumortier

Jost

et al. 2019

PROCEEDINGS OF the 29th Quadrennial Session of the CIE

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“…Figures 9(c) and 9(e) show that the p values of the log-rank test of the tunnel and ramp types are greater than 0.05, indicating no significant difference in the MLCD of the off-ramp vehicle. Since lane changing is prohibited within 100 m outside the exit of a tunnel [40], the driver could safely pass the "white hole effect" stage within 100 m [46], and the tunnel type had little effect on the driver's lane-changing behavior.…”

Section: Road Factorsmentioning

confidence: 99%

Off-Ramp Vehicle Mandatory Lane-Changing Duration in Small Spacing Section of Tunnel-Interchange Section Based on Survival Analysis

Shang

Lian

Zhao³

et al. 2022

Journal of Advanced Transportation

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Due to topography, geology, and other factors, small spacing sections are common between tunnels and interchange exits. There is mandatory lane-changing behavior for vehicles that need to leave the main line and drive inside the road before leaving the tunnel. Affected by the “white hole” of a tunnel, the lane-changing behavior of off-ramp vehicles differs significantly from that of original roadbed sections. To study the mandatory lane-changing duration (MLCD) of off-ramp vehicles in small spacing sections of the tunnel to interchange in mountainous areas, their time and trajectory data were collected based on a driving simulator. According to the characteristics of the data, the survival analysis method was used to analyze the influence on the MLCD of off-ramp vehicles of the spacing section between the tunnel and interchange, vehicle types, tunnel types, ramp types, highway service level, and whether to set exit advance guide signs in the tunnel and the Cox proportional hazards model of the MLCD was established. The results showed that the spacing of the tunnel interchange, the road service level, and whether to set exit advance guide signs in the tunnel had significant effects on the MLCD of vehicles, while the vehicle, the tunnel, and the ramp types did not. When the spacing section of the tunnel interchange was less than 500 m, the off-ramp vehicle had continuous mandatory lane-changing behavior, and when the distance decreased from 400 m to 300 m, the risk rate of lane changing increased by 5.68 times. Survival function curve estimation provided the 75% quantile of MLCD of off-ramp vehicles under different conditions, which could provide a theoretical reference for setting the minimum distance between a tunnel and interchange exit.

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“…Reaction time is the time from the beginning of stimulation to the beginning of observer reaction. At the same time, reaction time reflects the comprehensive influence of visual psychology and physiology on driving visual behavior in the process of road lighting, and is an important evaluation index for early recognition of obstacles and dangerous situations [49]. e main purpose of this experiment is to test the effect of CCT and CRI on human eye performance in tunnel driving environment.…”

Section: Selection Of Experimental Indicatorsmentioning

confidence: 99%

Study on the Influence of LED Spectrum on the Visual and Nonvisual Effects in the Interior Zone of Tunnels

Dong

Liu

Lou

et al. 2021

Journal of Advanced Transportation

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Judicious use of lamps is of profound significance to improve the internal traffic safety of tunnels. This study evaluated the biological effects of spectrum on human visual and nonvisual under mesopic vision category. According to the difference of human eyes’ response to the visual and nonvisual biological effects of different wavelengths of light radiation, a method of applying the mesopic visual spectral luminous efficiency curve to the assessment of nonvisual biological effects and blue light hazards is proposed. The results show that, in theory, under mesopic vision category, the spectrum with high correlation color temperature (CCT) and high color rendering index (CRI) has higher blue light content Z-value and has greater impact on human nonvisual effects and blue light radiation damage, but it can also provide higher human perception luminance. The visual effect detection experiment of driving in the interior zones of the tunnel is simulated in the laboratory, and the critical flicker frequency and reaction time are taken as physiological indexes. The results show that the spectrum with high CCT and high CRI corresponds to lower critical flicker frequency drop value and faster reaction time, which has a positive effect on improving driving safety. Therefore, this paper suggests that the LED with high CCT and high CRI (CCT = 6500 K, CRI2012 = 95) should be used in the interior zones of the tunnel with relatively short lighting section, and the CCT and CRI should be appropriately reduced in other road environments with long lighting section to reduce the impact of spectrum on nonvisual photobiology, so as to improve road traffic safety.

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Effects of transient adaptation on drivers’ visual performance in road tunnel lighting

Cited by 29 publications

References 12 publications

Impact of the Spectrum of Light on Visibility in Road Tunnels

Impact of the Spectrum of Light on Visibility in Road Tunnels

Off-Ramp Vehicle Mandatory Lane-Changing Duration in Small Spacing Section of Tunnel-Interchange Section Based on Survival Analysis

Study on the Influence of LED Spectrum on the Visual and Nonvisual Effects in the Interior Zone of Tunnels

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