Ключевые слова: 30, area, background, black, blue, car, caution, circle, city, country, drive, focus, germany, gravel, green, h, hour, kilometers, km, law, limit, limited, maximum, mph, nature, nobody, number, per, red, regulation, road, round, safety, side, sign, sky, slow, speed, street, summer, symbol, thirty, traffic, transport, transportation, travel, tree, warning, way, white,