Along the bottom is a 2D barcode that contains identification data. The back of the card features a 1D barcode that contains the cardholder's driver's license number and a magnetic stripe that contains identification data. A T marking will indicate Senior Citizen Transportation Reduced Fare.A P marking will indicate a Standby or Temporary Custodian.An M marking will indicate a Medical Alert.A L marking will indicate Limited Mobility.An A marking will indicate Metro Mobility.The word SENIOR will be used for cardholders 65 years or older who request their license indicate they are a senior citizen.A heart symbol with the word Donor will be displayed for organ donors.