The effect of dimmed road lighting and car headlights on visibility in varying road surface conditions

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The effect of dimmed road lighting and car headlights on visibility in varying road surface conditions. / Bozorg Chenani, Sanaz; Tetri, Eino; Kosonen, Iisakki; Luttinen, Tapio .

In: LEUKOS, Vol. 14, No. 4, 02.10.2018, p. 259-273.

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@article{46e201ee612f4a03b7f3bb517874a6f3,
title = "The effect of dimmed road lighting and car headlights on visibility in varying road surface conditions",
abstract = "This article evaluates the potential of dimming road lighting in order to save energy and lower costs while avoiding any adverse effects on the visibility of drivers. An experimental study under varying road surface conditions was conducted to examine the combined effect of car headlights and different road lighting intensities on the visibility level. The luminance levels of the road surface, contrast and visibility level of the objects were measured from a stationary car under three road surface conditions: a) dry, b) wet, and c) snowy conditions. The results support the feasibility of reducing road lighting intensity when car headlights are available. When within the range of car headlights, road lighting did not improve the visibility level. In the presence of car headlights, the average luminance providing a sufficient visibility level was found to be 0.19, 0.63 and 0.75 cd/m2 under dry, wet and snow conditions, respectively. This would allow an energy savings of 317kWh/year/luminaire, representing savings of 80{\%} luminaire/year for LED luminaires.",
keywords = "Car headlights, cost saving, dimming, energy saving, road lightning, road surface conditions, visibility level",
author = "{Bozorg Chenani}, Sanaz and Eino Tetri and Iisakki Kosonen and Tapio Luttinen",
year = "2018",
month = "10",
day = "2",
doi = "10.1080/15502724.2018.1452152",
language = "English",
volume = "14",
pages = "259--273",
journal = "LEUKOS",
issn = "1550-2724",
number = "4",

}

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TY - JOUR

T1 - The effect of dimmed road lighting and car headlights on visibility in varying road surface conditions

AU - Bozorg Chenani, Sanaz

AU - Tetri, Eino

AU - Kosonen, Iisakki

AU - Luttinen, Tapio

PY - 2018/10/2

Y1 - 2018/10/2

N2 - This article evaluates the potential of dimming road lighting in order to save energy and lower costs while avoiding any adverse effects on the visibility of drivers. An experimental study under varying road surface conditions was conducted to examine the combined effect of car headlights and different road lighting intensities on the visibility level. The luminance levels of the road surface, contrast and visibility level of the objects were measured from a stationary car under three road surface conditions: a) dry, b) wet, and c) snowy conditions. The results support the feasibility of reducing road lighting intensity when car headlights are available. When within the range of car headlights, road lighting did not improve the visibility level. In the presence of car headlights, the average luminance providing a sufficient visibility level was found to be 0.19, 0.63 and 0.75 cd/m2 under dry, wet and snow conditions, respectively. This would allow an energy savings of 317kWh/year/luminaire, representing savings of 80% luminaire/year for LED luminaires.

AB - This article evaluates the potential of dimming road lighting in order to save energy and lower costs while avoiding any adverse effects on the visibility of drivers. An experimental study under varying road surface conditions was conducted to examine the combined effect of car headlights and different road lighting intensities on the visibility level. The luminance levels of the road surface, contrast and visibility level of the objects were measured from a stationary car under three road surface conditions: a) dry, b) wet, and c) snowy conditions. The results support the feasibility of reducing road lighting intensity when car headlights are available. When within the range of car headlights, road lighting did not improve the visibility level. In the presence of car headlights, the average luminance providing a sufficient visibility level was found to be 0.19, 0.63 and 0.75 cd/m2 under dry, wet and snow conditions, respectively. This would allow an energy savings of 317kWh/year/luminaire, representing savings of 80% luminaire/year for LED luminaires.

KW - Car headlights

KW - cost saving

KW - dimming

KW - energy saving

KW - road lightning

KW - road surface conditions

KW - visibility level

UR - http://www.scopus.com/inward/record.url?scp=85054187202&partnerID=8YFLogxK

U2 - 10.1080/15502724.2018.1452152

DO - 10.1080/15502724.2018.1452152

M3 - Article

VL - 14

SP - 259

EP - 273

JO - LEUKOS

JF - LEUKOS

SN - 1550-2724

IS - 4

ER -

ID: 18218515