

Originally part of the New York and New England Railroad's mainline, it bypassed Back Bay Station, through which most of the south side commuter services ran. When the line was merged into the New Haven Railroad, which ran all the service radiating south of Boston, it was delegated primarily as the freight route, whereas the passenger route ran up what is now the Providence Line, passing through Back Bay on its way to South Station. Passenger service was provided until 1944.
Passenger service was restored on Nov. 3, 1979 when commuter trains and Amtrak intercity services were shifted over the the Fairmont line for the duration of the Southwest Corridor project. Three stations were served by a shuttle service. This service was kept after the other passenger services were restored to the mainline.
With the opening of the three new stations, service now consists of 40 to 45 minute headways at peak hours and hour headways in between.
Proposals to provide more frequent services (perhaps every 30 minutes) have been explored, as has the use of diesel multiple unit trains, which would be shorter and have faster acceleration.
Passenger service was restored on Nov. 3, 1979 when commuter trains and Amtrak intercity services were shifted over the the Fairmont line for the duration of the Southwest Corridor project. Three stations were served by a shuttle service. This service was kept after the other passenger services were restored to the mainline.
With the opening of the three new stations, service now consists of 40 to 45 minute headways at peak hours and hour headways in between.
Proposals to provide more frequent services (perhaps every 30 minutes) have been explored, as has the use of diesel multiple unit trains, which would be shorter and have faster acceleration.