Ключевые слова: area, asphalt, background, direction, empty, factory, floor, foot, foot steps, green, ground, highway, industrial, lane, line, lot, mark, marking, paint, pattern, pavement, pedestrian, road, route, safety, sefety, sidewalk, sign, signal, signals, step, street, surface, symbol, top, traffic, transport, transportation, urban, view, walkways, warning, way, working, yellow,