Really interesting to see this development in Europe - especially if it covers more than one type of transport and multiple operators.
These initiatives are much easier to implement if there is only one operator who can act as "Merchant of Record" for the purposes of processing payment card transactions - as with TfL.
If there are different franchisees operating bus, rail and other methods, it can be a different story. Especially if operators need to use the same systems and are expected to support fare capping.
allows users to pay for public transport services by simply bringing their card close to the GTT terminals while also benefiting from the best available travel tariff based on the number of journeys made