Causeway Street Elevated

The Causeway Street Elevated was a part of the MBTA's Green Line in Boston, Massachusetts that ran roughly northwards from Haymarket, emerging from the Canal Street Incline in parallel with the Charlestown Elevated tracks, then ran westwards after splitting from the Charlestown Elevated's parallel right-of-way for a short distance around the former Boston Garden — adjacent to and along the southeast-facing side of the older indoor sports venue's exterior (itself replaced in the mid-1990s by today's TD Garden) through the Green Line's North Station elevated stop, and resumed a north-westwards direction past North Station and the Garden, ending at Science Park. As the name suggests, the Elevated ran above ground, until it was closed in June 2004, being replaced by an underground tunnel as part of environmental remediation to compensate for increased air pollution caused by the Big Dig.

Today, the Green Line emerges from the underground tunnel about halfway between North Station and Science Park, where it connects via ramp directly to the Lechmere Viaduct, the Green Line's only remaining elevated track section. The MBTA has no plans to relocate any of the remaining track on the viaduct to an underground route.

The removal of the Elevated freed up land near the Big Dig and lowered noise levels associated with the trains' characteristic screech as they rounded sharp turns in the track.

References

• Lechmere, Science Park stations reopen

Massachusetts Bay Transportation Authority Subway lines (List of stations) Heavy rail      Blue      Orange      Red Light rail      Green "B" Branch "C" Branch "D" Branch "E" Branch      Ashmont–Mattapan      Commuter Rail lines (List of stations) North Station lines Fitchburg Haverhill (Wildcat Branch) Lowell Newburyport/Rockport South Station lines Fairmount Framingham/Worcester Franklin Greenbush Needham Old Colony (Kingston/Plymouth Middleborough/Lakeville      CapeFLYER) Providence/Stoughton Bus routes (List of routes)      Silver Crosstown routes Key routes Trackless trolleys Routes East Boston, Chelsea, Revere Melrose, Reading, Stoneham, Wakefield South Boston Other services      Boat The Ride Component parts of system lines      Boylston Street Subway      Haymarket North Extension      Lechmere Viaduct      Tremont Street Subway      Washington Street Subway Under construction           Government Center closure      Green Line Extension      South Coast Rail      Wachusett extension Proposed      Lynn extension           Red Line—Blue Line Connector Urban Ring Project      North–South Rail Link      Plaistow extension      Nashua extension      Westerly extension      Indigo Line (Fairmount Grand Junction Track 61) History Predecessor companies Boston Elevated Railway Eastern Massachusetts Street Railway Middlesex and Boston Street Railway Newton and Boston Street Railway Former lines      Atlantic Avenue Elevated      Causeway Street Elevated      Charlestown Elevated      Green Line "A" Branch      Lexington Branch Streetcar lines      Washington Street Elevated      Woburn Loop      History of the Green Line Other Accessibility Arts on the Line "Charlie on the M.T.A." CharlieCard Police Nomenclature Yards and maintenance facilities