Ключевые слова: abstract, arrow, blue, business, city, close, closed, commute, connection, door, doors, empty, enter, entrance, entry, floor, future, gap, green, in, inside, interior, line, metal, metro, mind, modern, move, nobody, open, out, platform, public, rail, railway, station, subway, technology, tiled, tone, traffic, train, transport, transportation, travel, tube, urban, way,