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Longfellow Boston Bound DetourOn Saturday, August 10 and Sunday, August 11, MassDOT will close the Longfellow Bridge to all motor vehicle travel, except MBTA buses. The closure is to implement an MBTA Red Line diversion related to bridge construction. Buses will replace Red Line trains for service between Kendall/MIT Station and Park Street Station, with a stop at Charles/MGH Station. The bus route and stops are shown on a map.

Bus service will be in place for Boston and Cambridge-bound Red Line customers from the start of service on Saturday, August 10 to the end of service on Sunday, August 11. Red Line trains will resume service on Monday morning. The diversion is necessary for MassDOT’s design/build contractor, White-Skanska-Consigli JV, to perform work in close proximity to the Red Line tracks that is not allowed during MBTA service hours. Please visit the MBTA’s service updates webpage for additional information.

MBTA buses will be the only motor vehicles permitted on the bridge. All other motor vehicles including passenger vehicles, trucks and all other buses will need to use one of two routes shown on the detour map to reach Boston. One route uses Memorial Drive westbound to make a u-turn at Ames Street for access to Memorial Drive eastbound to Land Boulevard and Charles River Dam Road (Monsignor O’Brien Highway/Route 28) to reach Leverett Circle. A second route uses 3rd Street and Binney Street to reach Land Boulevard. Truck restrictions are in place for Memorial Drive.

Emergency response, bicycle and pedestrian access will be maintained across the bridge during this weekend diversion. Please note: Bicyclists will be asked to walk their bikes on the sidewalk across the Longfellow Bridge to ensure the safety of all bridge users.

The Cambridge-bound detour remains in place using a signed route from Charles Circle following Charles Street to Leverett Circle, Monsignor O’Brien Highway/Charles River Dam Road and Edwin H. Land Boulevard (detour route map is attached).

For more information on the project and traffic management plans, visit the website at For questions, to report issues and concerns related to construction or to be added to the project email distribution list, please call the project hotline at 617-519-9892 or email


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