Fundamental Research on Visibility Performance under Pro-Beam Road Lighting

• Project/Area Number: 26630232
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Civil engineering project/Traffic engineering
• Research Institution: Hokkaido University
• Principal Investigator: Hagiwara Toru 北海道大学, 工学研究院, 教授 (60172839)
• Co-Investigator(Kenkyū-buntansha): 濱岡 秀勝 秋田大学, 理工学研究科, 教授 (70262269)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: プロビーム照明 / 道路照明 / 横断歩行者事故 / 夜間 / 歩行者 / 視認性 / 交通工学 / プロビーム配光 / 交通安全 / ヘッドライト / 照明協調

Outline of Final Research Achievements

The present study proposed a new road lighting using the pro-beam light distribution. Visibility performance provided by the current conventional road lighting brings some issues of concern in terms of changes of pedestrian visibility depended on positional relationship between location of pedestrian and luminaries. A field experiment was conducted on a test track using 12 participants. In this experiment, as simplified pro-beam road lighting was used to evaluate an effect of positive contrast consistently on visibility of pedestrian on the test track. We evaluated visibility performance of the pro-beam road lighting compared with the conventional road lighting. Results of the experiment indicated that visibility level of the pedestrians under the pro-beam road lighting was larger and constant rather than that under the symmetric road lighting. The pro-beam road lighting proposed by the present study might have a potential to show more positive effects on the road.

Research Products

• [Journal Article] Fundamental Research on Visibility Performance under Pro-Beam Road Lighting (2017)
  • Author(s): 草竹 大輝, 萩原 亨, 浜岡 秀勝, 江湖 俊介, 轟 麻起子, 岡嶋 克典, 小林 正自
  • Journal Title: JSTE Journal of Traffic Engineering Volume: 3 Issue: 2 Pages: A_84-A_91
  • DOI: 10.14954/jste.3.2_A_84
  • NAID: 130005312835
  • ISSN: 2187-2929
  • Peer Reviewed
• [Presentation] 街路におけるプロビーム道路照明の視認性評価に関する基礎的研究 (2016)
  • Author(s): 草竹 大輝
  • Organizer: 交通工学研究発表会
  • Place of Presentation: 日本大学理工学部駿河台キャンパス（東京都千代田区）
  • Year and Date: 2016-08-08
• [Presentation] Visibility assessment of pro-beam road lighting on the road (2015)
  • Author(s): Toru Hagiwara, Shouji Kobayashi, Hidekatsu Hamaoka
  • Organizer: ITS WORLD CONGRESS 2015
  • Place of Presentation: Bordeaux, France
  • Year and Date: 2015-10-05 – 2015-10-09
• [Presentation] Visibility assessment of pro-beam road lighting on the road (2015)
  • Author(s): Toru Hagiwara, Shouji Kobayashi, Hidekatsu Hamaoka
  • Organizer: ITS World Congress 2015
  • Place of Presentation: Bordeaux, France
  • Year and Date: 2015-10-05
  • Int'l Joint Research