The SmarTrip car is a plastic contactless stored-value smart card used for payment within the Washington Metro system of Washington, D.C. Unlike traditional paper farecards, it is designed to be permanent and reloadable, and as of 2004 can be used in all Metrorail stations, and on all Metrobuses. Additionally, as of June 28, 2004, SmarTrip is the only way to pay for parking fees at Metro-operated lots. SmarTrip can also be used on the DC Circulator. Other regional bus systems in neighboring Virginia and Maryland have adopted SmarTrip readers due to its success on WMATA Metrobuses.