Metro's largest union and Congressman Jamie Raskin are giving away $10 Metro cards to riders.
Raskin will join Metro workers Tuesday morning to give away 1,000 SmarTrip cards at the Silver Spring Metro station.
It's the first in a series of SmarTrip card giveaways being sponsored by the union. The union said in a statement that the giveaway is intended to thank riders for using Metro and encourage them to continue to ride the system.
The giveaway is scheduled to begin at 7:30 a.m.
The union represents more than 9,000 Metro employees.