Safety Evaluation of the Lighting at the Entrance of a Very Long Road Tunnel: A Case Study in Ilam

Mehri, Ahmad; Hajizadeh, Roohalah; Dehghan, Somayeh Farhang; Nassiri, Parvin; Jafari, Sayed Mohammad; Taheri, Fereshteh; Zakerian, Seyed Abolfazl

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자료유형: 학술저널

저자정보: Mehri, Ahmad (Department of Occupational Health, School of Public Health, Ilam University of Medical Sciences) Hajizadeh, Roohalah (Occupational Health Research Center, Qom University of Medical Sciences) Dehghan, Somayeh Farhang (Department of Occupational Health, School of Public Health, Tehran University of Medical Sciences) Nassiri, Parvin (Department of Occupational Health, School of Public Health, Tehran University of Medical Sciences) Jafari, Sayed Mohammad (Faculty of Medicine, Khatam Al-Nabieen University) Taheri, Fereshteh (Occupational Health Research Center, Iran University of Medical Sciences) Zakerian, Seyed Abolfazl (Department of Occupational Health, School of Public Health, Tehran University of Medical Sciences)

저널정보: 산업안전보건연구원 Safety and health at work : SH@W Safety and health at work : SH@W 제8권 제2호

발행연도: 2017.1

수록면: 151 - 155 (5page)

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Background: At the entrance of a tunnel, reflection of sunlight from the surrounding environment and a lack of adequate lighting usually cause some vision problems. The purpose of this study was to perform a safety evaluation of lighting on a very long road in Ilam, Iran. Methods: The average luminance was measured using a luminance meter (model S3; Hagner, Solna, Sweden). A camera (model 108, 35-mm single-lens reflex; Yashica, Nagano, Japan) was used to take photographs of the safe stopping distance from the tunnel entrance. Equivalent luminance was determined according to the Holliday polar diagram. Results: Considering the average luminance at the tunnel entrance ($116.7cd/m^2$) and using Adrian's equation, the safe level of lighting at the entrance of the tunnel was determined to be 0.7. Conclusion: A comparison between the results of the safe levels of lighting at the entrance of the tunnel and the De Boer scale showed that the phenomenon of black holes is created at the tunnel entrance. This may lead to a misadaptation of the drivers' eyes to the change in luminance level at the entrance of the tunnel, thereby increasing the risk of road accidents in this zone.

#black hole #De Boer scale #safe level of lighting #tunnel lighting

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Mehri, Ahmad

소속기관 Department of Occupational Health, School of Public Health, Ilam University of Medical Sciences