 Passengers may purchase passes at most farecard vending machines. The passes are used the same way as farecards but grant riders unlimited travel within the system for a certain period of time. All the passes are gate-activated, with the period of validity starting with the first use of the pass, and for the paper versions, the expiration date of the pass is printed on the pass when exiting the system at the end of the first trip. Four types of passes are currently sold:
