SmarTrip is a contactless stored-value smart card payment system managed by the Washington Metropolitan Area Transit Authority (WMATA). The Maryland Transit Administration (MTA) uses a compatible payment system called CharmCard. A reciprocity agreement between the MTA and WMATA allows either card to be used for travel on any of the participating transit systems in the Baltimore-Washington metropolitan area. Unlike traditional paper farecards or bus passes, SmarTrip/CharmCard is designed to be permanent and reloadable; the term "SmarTrip" may refer to both payment systems unless otherwise noted.