Accelerated Bridge Program Massachusetts Department of transporatation

MBTA Red Line Weekend Diversions

For 24-48 hours following the weekend diversions, Red Line trains will travel at reduced speeds across the Longfellow Bridge.

Please visit the MBTA's service updates webpage for additional information.

The project includes replacing the MBTA Red Line tracks, and other work in close proximity to them. The work will take place on 25 weekends over the project duration, and requires replacing Red Line trains with buses. During the MBTA weekend diversions, the Longfellow Bridge will be closed to all motor vehicle travel, except MBTA buses. The bus route will carry passengers between Kendall/MIT Station and Park Street Station, with a stop at Charles/MGH Station. All shuttle bus stops are accessible for people with disabilities. All other motor vehicles, including passenger vehicles, trucks, and all other buses, will need to use one of two detour routes to reach Boston.

Emergency response, bicycle, and pedestrian access will be maintained across the bridge during this weekend diversion. Bicyclists will continue to use the sidewalk on the upstream side of the bridge and pedestrians will continue to use the sidewalk on the downstream side.

The Cambridge-bound detour remains in place during diversion weekends. Details on the route can be found on the Traffic Information page.

To report issues or concerns or for questions related to construction, please use the dedicated project hotline, 617-519-9892, or the project email address,

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