Ключевые слова: access, automatic, bus, card, check, city, commuter, composter, control, device, electronic, entrance, fare, inside, journey, line, machine, metro, modern, pass, passenger, pay, payment, plastic, public, rail, railway, reader, service, smart, station, subway, system, technology, terminal, ticket, train, tram, transport, transportation, travel, trip, urban, validate, validating, validation, validator, vehicle, verification, yellow,