Ключевые слова: attention, background, blue, car, caution, concept, danger, design, direction, driving, empty, halt, highway, horizontal, icon, illustration, information, isolated, message, metal, object, octagon, outdoor, post, red, road, road sign, roadside, safety, sign, signal, sky, speed, stop, stop sign, street, symbol, text, traffic, traffic sign, transport, transportation, travel, vehicle, warning, way, white, yellow,