Ключевые слова: alert, attention, background, beware, black, business, careful, caution, danger, dangerous, diamond, difficult, direction, down, drive, go, goal, graphic, green, highway, icon, illustration, isolated, metal, notice, red, road, roadside, safe, safety, sign, signage, signal, slow, speed, stop, street, symbol, take, traffic, transport, transportation, travel, warn, warning, way, white, word, yellow,