 SmarTrip Cards and iRide SmarTrip Cards can be purchased at the Arlington Commuter Stores, located at Shirlington Transit Center, Ballston-MU Station, Rosslyn Station, Crystal City Station, and Pentagon Station.Arlington Mobile Commuter Stores also sells SmarTrip and iRide SmarTrip cards within Arlington County, as well as Washington, D.C. and Alexandria Union Station.iRide SmarTrips are sold exclusively in Arlington Commuter Stores, while regular SmarTrips are also available in WMATA Metrorail stations.