Chelsea station is a Massachusetts Bay Transportation Authority (MBTA) intermodal transit station located adjacent to the Mystic Mall in Chelsea, Massachusetts. It is the terminus of the SL3 route of the MBTA Silver Line bus rapid transit (BRT) network, and is served by the Newburyport/Rockport Line of the MBTA Commuter Rail. The accessible station has a loop with two small platforms for the Silver Line, and two full-length side platforms for commuter rail trains.