Porter is a Massachusetts Bay Transportation Authority (MBTA) transit station in Cambridge, Massachusetts. It serves the Red Line rapid transit line, the MBTA Commuter Rail Fitchburg Line, and several MBTA bus lines. Located at Porter Square at the intersection of Massachusetts and Somerville Avenues, the station provides rapid transit access to northern Cambridge and the western portions of Somerville. Porter is 14 minutes from Park Street on the Red Line, and about 10 minutes from North Station on commuter rail trains. Several local MBTA bus routes also stop at the station.