안개농도와 표출크기에 따른 가변형 속도제한표지의 판독거리 분석
Analysis of Legibility Distance of Variable Speed Limit Sign from Different Display Sizes and Fog Density
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초록
본 연구에서는 안개발생시 가변형 속도제한표지의 크기와 휘도에 따른 판독거리의 변화에관한 현장실험을 실시하여 결과를 제시하였다. 이를 위하여 안개상황 모의 환경을 구축하였고, 속도제한표지의 밝기와 크기를 변동하면서 피실험자 실험을 수행하여 시정거리에 따른 판독거리를 분석하였다. 분석 결과, 주어진 휘도에서 시정거리별 판독거리는 표지의 크기에 따라증가하지만, 완벽한 선형적인 관계는 나타나지 않았다. 그리고 짙은 안개 상황일수록 크기가큰 가변형 속도제한표지가 효과적인 것으로 파악되었다. 그리고 가변형 속도제한표지의 운영휘도를 증가할수록 판독거리가 증가하는 경향을 나타내었다.
Abstract
This study aims to evaluate the legibility distances of variable speed limit sign(VSL) for different sizes, luminances, and fog conditions through a field experiment. For this, extensive fog simulated environment has been constructed, and legibility distances are tested and recorded among test subjects for different luminances and sizes of VSL in control. Results showed that legibility distance increased as the size of VSL increased in the given illumination conditions, but it was not an exact linear trend. The size was also an important factor for determining legibility distance as the fog density increased, especially heavy fog conditions. In addition, the legibility distance also increased as the given illumination levels of VSL improved.
참고문헌 (10)
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