Ключевые слова: access, airport, automatic, background, barrier, boundary, building, business, card, check, city, close, commute, commuter, control, door, enter, entrance, entry, equipment, exit, gate, gateway, interior, metro, metropolis, modern, open, pass, passenger, people, platform, portal, public, rail, railway, scanner, security, sign, station, subway, system, technology, ticket, train, transport, transportation, travel, underground, urban,