I-495/I-90 Interchange Improvements Project
Advisory: Hopkinton, Westborough
Ramp Closures at I-495/I-90 Interchange
Overnight August 4-7
I-495 Southbound Traffic Shift Rescheduled to August 4
What is Happening?
The Massachusetts Department of Transportation (MassDOT) is announcing overnight ramp closures at the I-495/I-90 interchange to facilitate construction operations.
The I-90 eastbound ramp to I-495 northbound (Exit 106) will be closed nightly on Tuesday, August 4, through Friday, August 7 from 11:00 PM each night to 5:00 AM the following morning. During these overnight closures, the following detour will be in place:
- Take I-495 southbound to Exit 54A (West Main Street, Hopkinton) to reverse direction back to I-495 northbound.
Additionally, the I-495 northbound ramp to I-90 East and West (Exit 58) will be closed nightly on Tuesday, August 4, through Friday, August 7 from 11:00 PM each night to 5:00 AM the following morning. During these overnight closures, the following detour will be in place:
- Take I-495 northbound to Exit 59B (Route 9 westbound) to reverse direction onto I-495 southbound to access I-90 East and West.
Next, the I-90 westbound ramp to I-495 northbound (Exit 106B) will be closed nightly on Wednesday, August 5 through Friday, August 7 from 11:00 PM each night to 5:00 AM the following morning. During the overnight closure, the following detour will be in place:
- Take I-90 westbound to Exit 106A (I-485 southbound), then take Exit 54A to reverse direction onto I-495 northbound.
Lastly, traffic on I-495 southbound will be shifted from the median into the final alignment beginning the evening of Tuesday, August 4. This work was initially scheduled to take place the evening of Monday, August 3, but has been postponed due to weather.
This work will take place from 8:00 PM until 5:00 AM the following morning. During this time, one or more travel lanes may be temporarily closed to allow for these construction activities. At least one lane on I-495 southbound will remain open while the work occurs. Additionally, the connection to the I-90 eastbound and westbound on-ramp (Exit 58) from I-495 southbound will be moved approximately 1,000 feet south to its permanent location. You can view a map of the new traffic alignment here.
Appropriate signage, law enforcement details, and messaging will be in place to guide drivers through the work area.
Drivers traveling through the affected areas should expect delays, reduce speed, and use caution.
All scheduled work is weather dependent and/or may be impacted due to an emergency.
About the Project
The purpose of the I-495/I-90 Interchange Improvements Project is to provide a safe and efficient interchange of the interstate highways I-495 & I-90. The project will replace the interchange, eliminate the old toll booth area and weaving areas, improve ramp spacing, acceleration, and deceleration lanes, and add an auxiliary lane from I-495 Northbound to Route 9. New bridges will be constructed on I-495 over I-90, on I-495 and I-90 over the MBTA/CSX/Amtrak lines, on I-495 Northbound over Flanders Road, and on Fruit Street.
Stay Informed
If someone you know would like to subscribe to receive project updates, meeting notices, and traffic impact advisories, they can do so here.
To report a noise complaint, please call the project hotline: (508) 676-3551
Project email: 495-90Improvements@state.ma.us
Project website: www.mass.gov/massdot/495-
