Citation

Shibata Y, Kito M, Ishida H, Goto Y, Kamijo M. Trans. Soc. Automot. Eng. Jpn. 2020; 51(6): 1068-1074.

Copyright

(Copyright © 2020, Society of Automotive Engineers of Japan)

DOI

10.11351/jsaeronbun.51.1068

PMID

unavailable

Abstract

This report describes a road projection lamp in conjunction with a turn signal lamp (color: amber, blinking frequency: 1Hz) to reduce traffic accidents involving collisions with cyclists and pedestrians. Specifically, we highlight the required luminance contrast that is necessary for; 1) pedestrians in the vicinity of a car; 2) cyclists ability to detect the road projection on the road. Experiments were conducted from low-level daylight to nighttime. In addition, we also carried out glare evaluation of the road projection lamp that can be detected in the dark condition of night. When the irradiation distance from the lamp is 3 m, at a mounted height of 0.7 m and the lamp luminous intensity is 6,350 cd or more, road projection can be detected at an ambient illuminance of 800 lx or less. Also glare light at a lamp intensity of 10,300 cd is not a problem.

Language: ja

Keywords

Human Engineering; Lamp Luminosity; Luminance Contrast; Sensitivity/Vision/Visibility