Ключевые слова: abstract, announce, black, city, composition, concept, detail, form, freeway, gray, highway, information, informative, isolated, law, length, limitation, lisbon, location, mile, mileage, number, numbers, portugal, precaution, relief, restrict, restriction, risk, road, safety, shoulder, sign, signage, speed, street, summer, symbol, texture, traffic, transport, transportation, travel, urban, vehicle, warning, white,