Porter is an MBTA transfer station serving the rapid transit Red Line and the commuter rail Fitchburg Line, located at Porter Square in Cambridge, Massachusetts. Positioned 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.A series of commuter rail depots have been located at Porter Square under various names since the 1840s. The modern station with both subway and commuter rail levels was designed by Cambridge Seven Associates and opened on December 8, 1984. At 105ft below ground, the subway section is the deepest station on the MBTA system. The station originally had six artworks installed as part of the Arts on the Line program; five remain, including Gift of the Wind and Glove Cycle.