Importance of a Vector Component and the Vertical Illuminance in Road Lighting for the Obstacle Visibility of the Road

• Kimura Masayoshi

  NEXCO Engineering Shikoku Dept. of Electrical and Electronic Engineering, Ehime University

• Hamada Yoshifumi

  NEXCO Engineering Shikoku

• Ikeda Yoshihisa

  Dept. of Electrical and Electronic Engineering, Ehime University

• Motomura Hideki

  Dept. of Electrical and Electronic Engineering, Ehime University

• Jinno Masafumi

  Dept. of Electrical and Electronic Engineering, Ehime University

抄録

The authors introduce LED tunnel illumination for improving the vertical illuminance by considering the light as vectors when designing the light distribution. This new illuminating devices installed and evaluated the visibility of the road at Hanzan Tunnel for the down line of Takamatsu Expressway. As the result, the vertical illuminance is improved by 40% when increasing the ratio of vector component of light by using the Pro-bean. Actually, according to the questionnaire result of subjects who had a driver’s licence were different by gender, ages and driving experience, by increasing the vertical illuminance the visibility of the leading vehicle are improved significantly. Therefore, it is expected that the Pro-Beam illumination for improving the visibility by increasing the vertical illuminance is effective in reducing traffic accidents in tunnel.

収録刊行物

• Journal of Science and Technology in Lighting

  Journal of Science and Technology in Lighting 42 (0), 17-21, 2019-03-27

  一般社団法人 照明学会

キーワード

• LED lighting
• High uniformity
• Pro-Beam
• Vertical illuminance

詳細情報

• CRID: 1390001288144326784
• NII論文ID: 130007622799
• DOI: 10.2150/jstl.ieij140000551
• ISSN: 24323233
• ISSN: 24323225
• Web Site: https://www.jstage.jst.go.jp/article/jstl/42/0/42_IEIJ140000551/_pdf
• 本文言語コード: en
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