01656601

Component

The present study proposes a novel road lighting system that uses pro-beam light distribution. The visibility performance afforded by conventional road lighting has raised concerns about conflicts between road lighting and vehicle lighting, and the visual contrast of the pedestrian is known to depend on the relationship between the driver’s position and the pedestrian’s position. Pro-beam road lighting is a foundational solution for enhancing the visibility of pedestrians crossing the road. In the present study, the authors developed a proposed pro-beam luminaire that uses existing LED lamps and is designed to adjust the pro-beam road lighting distribution to achieve an ideal distribution. The visibility performance of the proposed pro-beam road lighting was evaluated by 16 young participants seated in a car on a test track. A field experiment found the visibility performance of the proposed pro-beam lighting in the longitudinal direction of the road to be higher than that of conventional road lighting. In addition, the present study revealed that vertical illuminance at the height of 0.8m strongly correlates with the average subjective visibility value. According to this relationship, two light distributions for the pro-beam road lighting were examined to improve the weaknesses of the proposed pro-beam road lighting. In the near future, commercial pro-beam road lighting that improves the visibility performance of roads in urban areas should be designed.

This paper was sponsored by TRB committee AND40 Standing Committee on Visibility.

18-01159

English

18p

2018

Transportation Research Board 97th Annual Meeting

Digital/other

Figures; References (8) ; Tables

Highway safety; Pedestrian movement; Pedestrians; Street lighting; Urban areas; Visibility

Highways; Operations and Traffic Management; Pedestrians and Bicyclists; Safety and Human Factors

Transportation Research Board Annual Meeting 2018 Paper #18-01159

TRIS, TRB, ATRI

Jan 8 2018 10:17AM