Ключевые слова: asia, asian, ballast, building, cheongnyangni, concrete, destination, electric, exchange, indoor, interchange, iron, journey, korean, light, line, passenger, path way, pathway, people, person, platform, rail, railroad, railway, sleeper, south korea, speed, station, steel, structure, system, top, track, traffic, train, transfer, transit, transport, transportation, travel, university of seoul, vehicle, view,