Effects of Vehicle Headlights on Target Contrast in Road Lighting Environments

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概要

• 論文の詳細を見る

• In this study road lighting measurements were made to investigate the impacts of vehicle headlights on luminance contrasts of various targets located on the road. Altogether seven different studies were made to investigate the contribution of halogen and high-intensity discharge headlights to road lighting. The measurement results indicate that in general, the use of dipped vehicle headlights, in the presence of road lighting, does not improve the visibility of various targets located on the road. In fact, in most occasions when the targets were seen darker than the background, dipped headlights reduced target contrasts and in some cases they even made the target merge into the background. The impacts of vehicle headlights are highly dependent on the vehicle, headlights type, target reflection factor, position of the target, position of the vehicle and road lighting conditions. As assumed, the effects of HID headlights on targets luminance contrasts were more significant compared to the ones of halogen headlights.

• 社団法人照明学会の論文

著者

• Halonen Liisa

  Lighting Unit School Of Science And Technology Aalto University

• Eloholma Marjukka

  Lighting Laboratory Helsinki University Of Technology

• Halonen Liisa

  Lighting Laboratory Helsinki University Of Technology

• EKRIAS Aleksanteri

  Lighting Laboratory, Helsinki University of Technology

• Ekrias Aleksanteri

  Lighting Laboratory Helsinki University Of Technology

関連論文

• Effects of Correlated Colour Temperature and Timing of Light Exposure on Daytime Alertness in Lecture Environments
• Effects of Vehicle Headlights on Target Contrast in Road Lighting Environments
• Comparison of Life Cycle Assessments of LED Light Sources

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