Ключевые слова: 30, alertness, background, black, circle, city, city center, city life, city street, cityscape, closeup, concept, copy space, creeper plant, danger, downtown, driving, europe, forbidden, information medium, information sign, italy, law, legal system, modern, number, number 30, outdoors, pole, red, road, road sign, roadside, roadsign, safety, sign, speed, speed limit sign, street, symbol, traffic, transportation, travel, urban, urban road, village, wall, warning sign, white,