Ключевые слова: accident, aid, assistance, attention, backdrop, background, beware, black, caution, copy, danger, dangerous, design, dirty, drive, driveway, driving, fair, first, floor, health, help, highway, iron, mark, message, old, play, protect, protection, road, safe, safety, secure, security, sign, signage, smart, solid, space, steel, street, surface, symbol, traffic, wall, warning, yellow,