Ключевые слова: about, attention, background, black, blowing, board, c, caution, concept, danger, departure, design, destination, direction, graphic, icon, information, metal, object, old, public, rail, railroad, railway, road, rock, safety, set, sign, signal, station, stop, subway, symbol, track, traffic, train, transport, transportation, travel, urban, vintage, way, whistle, white,