Main Street Reconstruction Project

Includes Ames St to Wadsworth St

Only westbound traffic permitted beginning November 9, 2015

Dear Kendall Square Neighbors and Business Owners:

The City’s contractor, Newport Construction, will begin work on the South (eastbound) side of Main Street on Monday, November 9, 2015, weather permitting. 

During this phase, Main St will function as a one way. While crews perform roadway work and construct raised crosswalks in the eastbound lanes, only westbound traffic on Main St will be permittedClick here for map with more information and detour routes.


  • Beginning Monday, November 9, crews will flip traffic on Main St and travel will only be permitted in the westbound lanes for the remainder of the construction season.
  • More information about this project and anticipated completion dates can be found at



  • During the road work phase, Main St will function as a one way. While crews reconstruct the eastbound lanes, only westbound traffic on Main St will be permitted.
  • MBTA Bus, shuttle and trolley stops on Main St will be relocated to the westbound lane.  Please check signs for temporary stops.
  • “No Parking” signs will be posted; please be sure to check dates/times.
  • Emergency vehicles will have access at all times.

If you have any questions regarding construction, please contact Dan Riviello, Community Relations Manager, at 617.349.4825/ or the Department of Public Works at 617-349-4800.  If you have any special need or disability, please contact us to arrange for special accommodations that may be necessary.

We apologize in advance for any inconvenience you may experience during this construction and thank you for your continued patience and understanding.

October 2015

  • Sidewalk pouring on South side by Ames Street will be completed in early October due to weather delays.
  • Sidewalk pouring to also occur in front of Microsoft, Legal Seafoods, Kendall (Outbound) in early October.
  • Tree plantings will begin in mid-late October.
  • Furniture install will begin in mid-late October.
  • Traffic Swap will begin mid-October with date dependent on weather.  Community will be notified of date of swap and variable message boards will be deployed. This traffic pattern will remain in place until the end of November.  The area will reopen during the winter months.
  • Project includes sidewalk and roadway reconstruction, new vehicular connection from Third St to Main St, enhanced tree plantings and street lighting.

September 2015

  • Brick work is continuing on the North side and much will be in place in the coming weeks.
  • Curb and sidewalk work is taking place on the South side from Hayward to Wadsworth.
  • Newport Construction is planning on reconstructing the southerly sidewalk on Main St between Hayward and Wadsworth Streets and around the MBTA outbound stairs, during off hours beginning Monday, September 21. 
  • Excavation of sidewalk along the clock tower building will start at 4 am Monday, September 21. Newport will return at 8 pm Monday evening and work through the night into Tuesday morning, pouring new concrete sidewalks.
  • If needed, they will return Tuesday evening, September 22, into Wednesday morning to work 11 pm to 7 am.  This work is being done in the evening in order to minimize impact to the MBTA station operation as well as the abutting business entrances while we reconstruct the sidewalks.
  • The work zone will be on the Main St sidewalks between Hayward and Wadsworth streets, including sidewalk reconstruction around both MBTA stairs.  On Monday morning, once the existing asphalt is removed, temporary metal and/or gravel walks will be placed to the business entrances during the daytime.  Once the concrete is poured overnight, as needed, thin plywood or ramps will be placed to allow access to entrances on Tuesday morning.

August 2015

During the month of August, crews will be focused on reconstructing the sidewalks on the north side of Main Street. The north side of Main Street (sidewalks) is expected to be completed by the end of this month. Once the north side has been completed, crews will begin to reconstruct the south side of Main Street.


Main Street Construction Update - October 15, 2015
*Please note the following anticipated schedule is weather dependent*

Anticipated Completion - Fall 2015:

  • North sidewalk concrete & brick
  • South sidewalk concrete & brick from Hayward to Wadsworth
  • Concrete & brick at corner of Main at Ames
  • Mid-block raised crosswalk
  • Raised crosswalk across Main from Kendall Flower Shop to Point Park
  • Metal benches; concrete benches pending delivery
  • Traffic flip to westbound lane for remainder of 2015 construction season; will reopen to two-way traffic this winter

Anticipated Completion - Spring 2016:

  • Remaining South sidewalks
  • Tree planting, seeding, & irrigation
  • Remaining furniture installation
  • Raised crosswalks across Wadsworth, Hayward, & Dock
  • Grinding & paving of intersections at Main & Ames as well as Broadway & Third
  • Final roadway paving

The City of Cambridge appreciates your patience.

For more information, please contact Cambridge Public Works Community Relations Manager, Dan Riviello, at

April Activity

During the week of April 21, sidewalk and roadway reconstruction will begin.  The road work will take about one month to complete and the sidewalk work will be ongoing through the spring and summer.

We expect construction activities to resume in the fall of 2015.  

February Activity

Crews will mobilize on Main St on Wednesday, February 25 to begin removing the deteriorated pear trees from the project area.  The trees have structural flaws that make them susceptible to storm damage.  Crews will plant a total of 58 new trees , from 5 different species at the end of the construction this fall.  For more information on the Main St tree plan, please visit the Documents tab.


March/April Activity

In mid-March, crews are expected to resume utility work on the north side of Main St, between the MBTA station and Ames St.  In April, construction activities will ramp up with crews starting road and sidewalk reconstruction.  We expect the surface work to continue through the summer.

We expect construction conclude this fall 2015. 



Project Background 

Through the Kendall Square Planning Study (K2C2 ), a plan of improvements for Main Street (Ames to Wadsworth) has been developed. The plan will provide a high quality experience for pedestrians and cyclists with reconstructed sidewalks and roadway, enhance transit accommodations, provide a new connection from Third St to Main St, and include seating, bus shelters and bike parking, including artist designed bike racks. 

Please also check the K2C2 website for more information on this project.


For more information on the Main Street project, please contact Dan Vallee, project manager, at 617.349.4813.


For more information about the K2C2 study, please contact Iram Farooq at /617.349.4606. The Community Development Department TTY line is 617.349.4621.

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Dept of Public Works

147 Hampshire St
Cambridge MA 02139


Hours of Service

Monday: 8:30am-8:00pm
Tuesday-Thursday: 8:30am-5:00pm
Friday: 8:30am-12 noon
24 Hour emergency 617.349.4860


Tuesday & Thursday: 4:00pm-7:30pm
Saturday: 9:00am-4:00pm

Owen O'Riordan