Ключевые слова: access, accessibility, airport, arrow, automatic, barrier, barriers, boundary, card, check, city, closed, control, door, doorway, enter, entrance, entry, equipment, exit, forbidden, gate, gateway, hall, interior, machine, metro, modern, open, pass, passenger, public, railway, row, security, service, sign, station, steel, subway, system, technology, ticket, train, transport, transportation, travel, turnstile, underground, urban,