A SmarTrip® card is a permanent, rechargeable card used to pay Metrorail and local bus system fares. It's plastic, like a credit card, and is embedded with a special computer chip that keeps track of the value of the card.
Using a SmarTrip® card is fast and easy. You simply touch the SmarTrip® card to the circular targets on top of or inside station faregates. Likewise, you can tap the SmarTrip® farebox on Metrobus to pay your fare with SmarTrip®.