Ключевые слова: ahead, area, background, beware, billboard, black, brake, break, bus, care, careful, carefully, caution, child, cross, danger, dangerous, design, drive, highway, kid, law, limit, message, notice, object, pole, red, reduced, road, safety, school, sign, signal, slow, speed, street, student, symbol, traffic, transport, warning, way, white, yellow, zone,