Sullivan Station serves the MBTA's Orange Line and functions as the hub of several bus lines. On a week day, the station's 222 parking spaces fill up quickly. Additional paid lots are located nearby and short-term street parking is also available. The following bus routes start, terminate or pass through the station: 86, 89, 90, 91, 92, 93, 95, 101, 104, 105, 109 and CT2.