Google Pay for Transit enables closed loop cards for public transit agencies with popular protocols such as MIFARE DESFire and MIFARE Plus, CMD2 (ITSO), and others. This allows Public Transit Operators (PTOs) to issue virtual cards with the same protocols used by their existing fare validators. For more details, see Prerequisites.
Transit agencies that integrate with one of the preceding solutions can let users purchase and store a virtual transit card on their mobile device. These cards can have a prepaid balance, passes, or both. The cards show important information, such as available balance, and ticket details like expiry, validity of pass, recent transactions, or travel history.
Users can also top-up their balance or purchase additional tickets directly through Google Pay or through a transit agency's own app.