Ключевые слова: access, accessibility, airport, background, barrier, blur, channel, check, city, close, door, enter, entrance, entry, exit, gate, gateway, interior, leave, light, line, machine, metro, modern, mtr, open, pass, passage, passenger, portal, public, rail, railway, row, security, sign, skytrain, speed, station, subway, technology, ticket, train, transportation, turnstile, underground, urban, way,