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発表 Required Luminous Intensity of LED Roadway Delineators under Foggy Conditions

作成年度 2007年度
論文名 Required Luminous Intensity of LED Roadway Delineators under Foggy Conditions
論文名(和訳)
論文副題
発表会 7th International Conference of EASTS
誌名(No./号数) Journal of EASTS’07 in Dalian
発表年月日 2007/09/24 ~ 2007/09/27
所属研究室/機関名 著者名(英名)
寒地交通チーム宗広 一徳(MUNEHIRO Kazunori)
寒地交通チーム徳永 ロベルト(TOKUNAGA Roberto Abraham)
寒地交通チーム浅野 基樹(ASANO Motoki)
北海道大学大学院工学研究科萩原 亨(HAGIWARA Toru)
抄録
This study involved the subjective visibility evaluation of LED roadway delineators under different visibility conditions both at daytime and nighttime. The experiment was conducted using a road in Hokkaido、 Japan under natural foggy conditions. The authors employed three types of LED delineators to examine how their visibility differed across various levels of luminous intensity. Twenty women participated as subjects. They were asked to evaluate the visibility、 glare、 and safety of each test accessory. In heavy fog、 LED delineators earned a high rating of subjective visibility at daytime and nighttime. It was also recognized that the luminous intensity of the light-emitting elements in the delineators required adjustment depending on the degree of visibility reduction due to fog: To make the delineator "visible" from the observation distance of 200-m under foggy conditions with a visibility distance of 100-m、 luminous intensities of 1、000-cd and 70-cd are desirable for daytime and nighttime、 respectively.
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