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Longfellow Bridge Construction Update 7-29-13


Longfellow Bridge

The much awaited reconstruction of the Longfellow Bridge has started. The construction will take 3 1/2 years. On Sunday July 21, the bridge was reduced to one travel lane into Boston. The Red Line, pedestrian access and bicycle lanes in both directions remains.

MassDOT, Cambridge and Boston are working closely together to monitor and improve the detour operation. Daily debriefings occur with all stakeholders and public safety providers and improvements made in response to the problems that arise.

Drivers are still adjusting to which route they will use, but generally the operation has gone well. Traffic has been heavy at Leverett Circle and O’Brien Highway at the Gilmore Bridge on the primary detour route, and along Mass Ave in both Boston and Cambridge. It should settle down over the next few weeks. The operation will then need to take on the added traffic the region always experiences in September. 

The Longfellow Bridge Rehabilitation Project is part of the Patrick Administration’s $3 billion Accelerated Bridge Program. For more information on the project and traffic management plans, visit the website at For questions or to report issues and concerns related to construction, please call the project hotline at 617-519-9892 or email to be added to the project distribution to receive project updates and meeting notices.

The Cambridge Traffic, Parking and Transportation Department encourages Cambridge businesses and residents to contact them about any issues about travel in the area. We strongly urge anyone who can to use transit, walk, bicycle, or drive in off peak times.

Cambridge Traffic, Parking and Transportation contact information:
Susan Clippinger, Director,, 617-349-4743
Jeff Parenti, Traffic Engineer,, 617-349-4715

Link to Cambridge Bound Vehicle Detour Map

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Visiting City Hall

Cambridge City Hall

795 Massachusetts Ave
Cambridge MA, 02139
Ph: 617-349-4000
TTY: 617-349-4242

Hours of Service

Monday: 8:30am-8pm
Tuesday-Thursday: 8:30am-5pm
Friday: 8:30am-12pm

Richard C. Rossi
City Manager

Lisa C. Peterson
Deputy City Manager