降り方向からみた段差の視認性に及ぼす境目および高さの視認性の影響

摘要

Steps are common features in our day-to-day living and working environment. Unfortunately, the occurrence of accidents on or around steps is thus inevitable. A failed visibility to see or recognize a step remains the most common attribute in these accidents. Surprisingly, appropriate methods for examining and quantifying step visibility have yet to be established. In this research, sensory scales on edge and height visibility as well as step visibility were created in order to examine mainly the effects of two factors on step visibility in sensory testing methods; easiness of visual perception of edge and height while viewing a step from the descending direction. Results of sensory tests revealed that edge visibility is independent from height visibility, and step visibility has stronger relationship with height visibility than edge visibility.%床や路面の段差（以降、単に“段差”と記す）は、計画上の必要性や施工上の制約などのさまざまな理由により、住環境に広く存在する。しかし、段差の中には視覚的に知覚しにくいものもあり、段差の視覚的な不備は段差で発生する転倒事故の一因として指摘されている。