🚨 Attention Fairmount Line riders If you are paying with a CharlieCard you must validate your fare before entering or exiting the fare gates. If your trip begins at South Station, you’ll need to validate your CharlieCard at the fare vending machines near the station’s ticket office. You’ll then be able to tap your CharlieCard at the gate. If your trip ends at South Station, you’ll need to see a conductor onboard or staff on the station platform. | MBTA Commuter Rail