Ключевые слова: attention, background, blue, car, caution, clear, color, communication, control, danger, direction, drive, forbidden, halt, highway, information, isolated, landscape, low, metal, nobody, object, octagon, outdoors, pole, post, red, road, roadside, safety, sign, signage, signal, single, sky, speed, stop, street, symbol, text, traffic, transport, transportation, travel, warning, way, white, word,