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For Immediate Release

August 4, 2021

MassDOT Advisory: Acceler-8 I-90 Bridge Replacement Project

I-90 Eastbound Bridge Replacement, August 6 through Monday, August 9 

WESTBOROUGH/SOUTHBOROUGH – The Massachusetts Department of Transportation (MassDOT) is announcing that it will replace the I-90 eastbound bridge over Parkerville Road in Southborough and Flanders Road in Westborough from 7:00 p.m. on Friday, August 6 to 5:00 a.m. on Monday, August 9. Eastbound traffic will be shifted through a median crossover to the westbound side of I-90. Travel will be reduced to two lanes in each direction and opposing traffic separated by a barrier.

Parkerville Road and Flanders Road will be closed under the bridges and through traffic detoured from approximately 4:00 p.m. on Friday to 5:00 a.m. on Monday.

MassDOT is replacing bridges on I-90 eastbound and westbound over Flanders Road in Westborough and Parkerville Road, Cordaville Road, and Woodland Road in Southborough as part of this project. The replacement of the eight bridges (2 spans per local road) is taking place over eight weekends between June 18 and August 16, 2021.

There will be advance signage in place to alert drivers to the I-90 configuration change and Parkerville Road and Flanders Road detours.

Note: All times are subject to change based on weather or unforeseen events.

Friday Night, August 6 (beginning at 7:00 p.m.):

  • I-90 eastbound traffic will be shifted through the median crossover into two right lanes of what is usually I-90 westbound
  • I-90 westbound traffic will be shifted to the right into two lanes

Monday Morning, August 9 (completed at 5:00 a.m.):

  • I-90 eastbound traffic will be shifted back to three lanes on I-90 eastbound
  • I-90 westbound traffic will be shifted back to three lanes on I-90 westbound

If there is inclement weather that impacts the schedule above, MassDOT will reschedule the replacement to the weekend of August 13 through August 16.

If you travel on I-90:

During the replacement, both directions of I-90 will be reduced from three to two lanes between Route 9 in Framingham (Exit 111) and I-495 in Hopkinton (Exit 106), which will result in higher than normal congestion.

If you travel on I-495:

During the replacement, there will be higher than normal congestion along the I-495 corridor approaching the on-ramps to I-90.

If you use Parkerville Road or Flanders Road:

Parkerville Road and Flanders Road will be closed to through travel. Local access to homes and businesses will be maintained on either side of the bridges. The detour route map for both detours can be viewed on the website.

Plan ahead: The reduction of I-90 from three to two lanes will result in higher than normal congestion, drivers should plan accordingly.

Drivers traveling eastbound through the project should be prepared for the shift into the westbound lanes.

Stay up-to-date and informed by following the @MassDOT Twitter account, visiting the project website, or emailing us with any questions.

For more information on traffic conditions, travelers are encouraged to:

  • Dial 511 and select a route to hear real-time conditions.
  • Visit, a website that provides real-time traffic and incident advisory information, and allows users to subscribe to text and email alerts for traffic conditions.
  • Follow MassDOT on Twitter @MassDOT to receive regular updates on road and traffic conditions.
  • Download MassDOT’s GoTime mobile app and view real-time traffic conditions before setting out on the road.


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