Senior SmartTrip cards may be purchased for $2 at any library in Montgomery County (there is no value on the card at the time of purchase). To qualify, seniors must be 65 years or older and proof of age is required at the time of purchase. In addition, the Division of Treasury at 27 Courthouse Square, Suite 200, Rockville, MD (Mon-Fri from 8:00 AM-4:30 PM) will handle retail sales and add value. Also, the Mobile Commuter Store and Silver Spring TRIPS Commuter Store located at 8404 Colesville Road, Level 2 of the Paul Sarbanes Transit Center (Mon-Fri from 6:00 AM-6:00 PM and Sat - Sun from 7:00 AM - 4:00 PM) are available for SmartTrip card sales. Riders may also upload value on line or at the above referenced locations. Please see links below.