Ключевые слова: background, business, car, cargo, caution, conceptual, construction, control, crossing, danger, departure, electrical, equipment, illuminated, industry, infrastructure, iron, journey, junction, light, line, metal, nature, public, rail, railroad, railway, red, road, safety, semaphore, sign, signal, station, steel, stop, stoplight, symbol, symbolical, track, traffic, train, transport, transportation, travel, urban, wait, warning, way, winter,