Ключевые слова: alert, american, arrow, attached, auto, automobile, background, board, bolt, caution, clear, concept, danger, destination, direction, directional, driving, fine, highway, icon, information, law, message, metal, notice, one, oneway, outdoor, pole, post, rectangle, red, reflective, restrict, road, roadside, route, rule, sign, signage, street, symbol, text, traffic, transportation, travel, trip, usa, warning, way,