Ключевые слова: access, accessibility, barrier, boundary, check, city, control, design, door, doorway, enter, entrance, entry, equipment, exit, gate, gateway, interior, iron, line, machine, metal, metallic, metro, modern, open, pass, passage, passenger, public, rail, railroad, railway, row, security, station, steel, street, subway, system, technology, ticket, train, transport, transportation, travel, turnstile, turnstiles, underground, urban,