Ключевые слова: achievement, asphalt, background, blue, business, caution, challenge, concept, crossing, curve, danger, diamond, drive, highway, hope, image, information, isolated, landscape, lane, law, limit, livestock, nobody, opportunity, optimistic, outdoors, photograph, positive, post, prohibited, red, road, roadsign, safety, sign, sky, speed, stop, street, symbol, traffic, transport, transportation, warning, white, winding, you, yourself,