Ключевые слова: blue, business, color, depot, energy, fast, german, germany, high, industry, lights, metro, modern, move, movement, moving, public, railroad, railway, rapid, sign, speed, station, stop, subway, symbol, technology, town, track, traffic, train, transit, transport, transportation, travel, trip, tube, u, ubahn, underground, urban, vehicle, wagon, wait, way, white,