Boarding public transport and pay the fare by simply tapping with a contactless payment card or mobile phone (to which the card is binded) on turnstiles or authorized readers: Rome is the first city in Europe to offer this contactless payment service to cardmembers from international schemes UnionPay. The service, commonly known as open loop transit, is now available through Nexi, which has entered into two separate strategic agreements with the two global card schemes to allow the holders of their contactless cards or mobile phone (to which the card is binded) to access Rome's public transportation by paying the fare in this extremely simple, fast, and secure way, due to the contactless sales channel developed by ATAC across the entire transportation network of Rome. Millions of tourists and citizens, especially from Asian countries, will be able to benefit from the service on all public transportation vehicles in Rome: the service is active on all surface lines, buses, trams, and trolleybuses, as well as on the entire metro network (metro A, metro B/B1, metro C), in addition to some urban railway lines equipped with entrance turnstiles.

There are several advantages, both for passengers and for urban mobility as a whole: no need to purchase a ticket in advance, maximum convenience, security of purchase, guarantee of the best fare calculated on the basis of the last 24 hours of travel, and greater accessibility to public transportation. The service, which is already available to passengers with Mastercard, Visa, and American Express cards, has already been extended and is currently active for UnionPay cardholders.