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The City of Cambridge is notifying residents, businesses, and visitors of street closures and traffic impacts on Saturday, August 30 for the Harvard Square Asian Night Market, back-to-school the week of Tuesday, September 2, the 2025 Feast of Saints Cosmas and Damian Tuesday, September 2 through Sunday, September 7, with additional impacts on Sunday, September 7 for the Cambridge Carnival Parade. Also, the Department of Public Works will be doing paving work for the River Street Project. Please follow all posted detour and parking restriction signage, plan ahead, and consider using alternative routes or modes of transportation. These events will affect the areas of Harvard Square, Central Square, Cambridge Street, and University Park.
Street Closures and Impacts:
Brattle Plaza to Church Street closed
Time of Closures:
3:00 PM – 11:00 PM
Find more information here.
Tuesday, September 2 marks the beginning of a new 2025-2026 school year here in Cambridge. Back to school means there will be a lot more traffic on the road, including school buses, as well as more pedestrians and bicyclists. We want everyone driving to pay attention and slow down, especially in school zones.
Please expect traffic delays, watch for children, and stop for school buses and crossing guards.
Of note: The return of school will also include the opening of the new Tobin Montessori and Darby Vassall Upper Schools and Community Complex in West Cambridge. Buses will load and unload at the Vassal Lane bus loop during school start and dismissal times:
Let’s all work together to ensure a safe start to the school year. We hope all parents, students, and teachers have a wonderful back-to-school start!
Street Closures and Impacts:
Marcarelli Way closed all day September 2 through September 7
Warren Street closed from Cambridge St to Gore St September 3- 7
Porter Street closed from Warren St to Bedford St September 3- 7
Jefferson Street closed from Warren St to Marion St September 3- 7
Cambridge Street from railroad tracks to Berkshire St September 6 only
Cambridge Street in front of 716 Cambridge Street September 7 only from 5:00 PM - 6:00 PM
Time of Closures:
Tuesday Sep 2 (Marcarelli Way only): Starting at 8:00 AM through Sunday
Wednesday Sep 3: 5:00 PM - 11:00 PM
Thursday Sep 4 (Start of Feast): 9:00 AM - 11:00 PM
Friday: 9:00 AM - 11:00 PM
Saturday: 7:00 AM - 11:30 PM
Sunday: 9:00 AM - 11:30 PM
Note: Streets will begin closing as early as Tuesday, September 2 for event set-up, please follow all signs carefully.
Find more information here.
Thursday, September 4
Street Closures and Impacts:
Pleasant Street, Auburn Street, Franklin Street (north/west of River Street) – no access to River Street.
Paving on River Street – Kinnaird Street to Green Street (north side).
Paving on Magazine Street – Franklin Street to Green Street.
River Street reduced to one lane.
Side Street Impacts:
Time of Closures:
Hours of work are scheduled for 7:00 AM to 4:00 PM primarily (some impacts will only be for part of the day). Dates are subject to change due to weather or other conditions.
Friday, September 5
Street Closures and Impacts:
Paving on River Street – Kinnaird Street to Green Street (south side).
Paving on Pleasant Street – Pleasant Place to River Street.
River Street reduced to one lane.
Side street impacts:
Time of Closures:
Hours of work are scheduled for 7:00 AM to 4:00 PM primarily (some impacts will only be for part of the day). Dates are subject to change due to weather or other conditions.
Visit the DPW project page for more information.
Street Closures and Impacts:
Blackstone from Western Ave to River Street
Sidney Street from Mass Ave to Pacific Street
Expect impacts in the area surrounding University Park
Time of Closures:
Blackstone Closure: 7:00 AM - 2:00 PM
Sidney St Closure: 5:00 AM - 9:00 PM
Find more information here.
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