Last month, NJ Transit became the first public transportation agency to partner with Google Wallet, which provides a free mobile app which uses near field communication (NFC) enabled phones to buy and pay for transit tickets.

Once fully implemented, customers on the country’s third-largest transit system will be able to wave their smartphone near a sensor on a ticket kiosk and confirm the transaction details right on their phone. The service will be available at New York’s Penn Station, Newark airport’s Air Train station and on select bus routes. Google Wallet currently is available on Sprint’s Nexus S 4G phone and supports Citi MasterCard credit cards and a Google Prepaid Card.