Ключевые слова: automatic, bus, card, cashless, check, city, contact less, control, credit, device, electronic, entrance, fare, interior, journey, machine, modern, non contact, noncash, passenger, pay, paying, payment, plastic, prepaid, public transport, railway, reader, security, service, smart, station, system, technology, terminal, ticket, ticket valuator, ticketless, tram, transaction, transit, transport, transportation, travel, urban, validate, validating, validation, validator, vehicle,