TCOMMUTER RAIL BLUE HILL AVE SOUTH STATION 6 Ticket Card Validation Try the improved Fairmount Line Now with trains every 45 minutes MBTA.com/fairmountpilot KEOLIS Massachusetts Bay Transportation Authority City of Boston Transportation TCOMMUTER RAIL BLUE HILL AVE SOUTH STATION 6 Ticket Card Validation Try the improved Fairmount Line Now with trains every 45 minutes MBTA.com/fairmountpilot KEOLIS Massachusetts Bay Transportation Authority City of Boston Transportation