Ключевые слова: accessibility, background, blindness, building, cane, city, difficulty, direction, disability, disabled, exterior, floor, foot, footpath, garden, grass, green, handicap, handicapped, help, lane, lawn, line, mark, natural, nature, navigation, obstacle, outdoor, passage, pattern, paved, pavement, paving, pedestrian, plant, public, road, sidewalk, sign, signal, signboard, signposting, stone, summer, symbol, tree, walk, walkway,