Ключевые слова: access, accessibility, barrier, boundary, business, card, closed, control, design, electronic, enter, entrance, entry, equipment, exit, gate, gateway, going, illustrative editorial, iron, machine, metal, metallic, metro, modern, nobody, office, open, pass, passage, public, railway, security, silver, station, steel, subway, system, technology, through, ticket, tourists, tourniquet, transportation, turnstile, turnstiles, underground,