Ключевые слова: 50, background, blue, circle, do not, drive, fifthy, highway, hour, kilometers, km, law, lights, limit, limited, maximum, miles per hour, mph, nature, number, outdoor, per, prohibited, red, regulation, restriction, road, road sign, roadsign, round, rule, safety, side, sign, sky, slow, slow down, speed, speed limit, street, symbol, traffic, transport, transportation, travel, tree, warning, warning sign, way, white,