Ключевые слова: 20, america, black, character, control, cutout, direction sign, drawing, drive, enforced, forbidden, highway, hour, identification, information, isolated, law, limit, mark, metal, miles, mph, nobody, number, per, police, post, regulation, restriction, road, route, sign, slow, speed, speed limit, square, symbol, traffic, traffic sign, transportation, travel, violation, warning, white,