Effects of the Difference in the Lightness of Roads on the Scenery and Level of Difficulty in Identifying Pedestrians

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  • 路面の明度の違いが道路景観の印象と歩行者の見えに及ぼす影響
  • ロメン ノ メイド ノ チガイ ガ ドウロ ケイカン ノ インショウ ト ホコウシャ ノ ミエ ニ オヨボス エイキョウ

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This study reports the findings of a survey, involving female college students, conducted to examine the effects of the colors of roads (eight achromatic colors from N1.5 to 8.5) on scenery and the relationships between the eight colors of roads, level of difficulty in identifying pedestrians walking on the road, colors (red, green, blue, white, grey, and black) of clothing, and the distance between the pedestrian and observer. Roads with a moderately bright color were related to affinity, whereas the subjects evaluated brightly colored roads in terms of safety. There was a significant relation between the color of the road and distance over which the observer was able to identify pedestrians wearing white or grey clothing. The greater the difference in the lightness of the road and clothing, or the greater the distance, the easier it was to identify a pedestrian with white clothing. Similarly, the smaller the difference in the lightness of the road and clothing, or the smaller the distance, the more difficult it was to identify a pedestrian with grey clothing. No marked relation was noted between the color of the road and distance to identify pedestrians in red, green, blue, or black. Regardless of the lightness of the road, it was easy to identify pedestrians wearing red clothing. The difference in the lightness of the road and clothing was most closely related to the ease of identifying pedestrians wearing black, blue, and green (less difficult in this order) clothing. The larger the distance, the more difficult it was to identify pedestrians wearing green or blue clothing, except when the color of the road was N8.5.

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