Fundamental Research on Visibility Performance under Pro-Beam Road Lighting

2016 Fiscal Year Final Research Report

• 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)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: プロビーム照明 / 道路照明 / 横断歩行者事故 / 夜間

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.

Free Research Field

交通工学