Status
Project construction continues on the I-495/I-90 Improvements project. The following activities are underway:
Overnight Ramp Closures at I-495/I-90 Interchange
The I-90 westbound on ramp from I-495 northbound and southbound will be closed overnight on Monday, November 2 from 11:30 PM to 5:00 AM the following morning. During this overnight closure, the following detour will be in place:
- Take I-90 eastbound to Exit 111 (Route 9 East Framingham) to reverse direction at Country Club Lane back onto I-90 westbound.
The I-495 northbound ramp to I-90 eastbound and westbound (Exit 58) will be closed overnight on Sunday, November 1 from 11:00 PM to 5:00 AM the following morning. During this overnight closure, the following detour will be in place:
- Take Exit 59B (Route 9 westbound) to reverse direction back to I-495 southbound, then take Exit 58.
The I-90 westbound ramp to I-495 northbound (Exit 106B) will be closed overnight on Monday, November 2, Wednesday, November 4, and Thursday, November 5 from 11:00 PM to 5:00 AM the following morning. During these overnight closures, the following detour will be in place:
- Take Exit 106A (I-495 southbound), down to Exit 54A, and reverse direction back onto I-495 northbound.
Additionally, the I-495 northbound ramp to Route 9 East (Exit 59A) will be closed overnight on Monday, November 2, Wednesday, November 4, and Thursday, November 5 from 10:00 PM to 5:00 AM the following morning. During these overnight closures, the following detour will be in place:
- Use Exit 59B (Route 9 westbound) to reverse direction back to I-495 southbound, then take Exit 59A.
The I-90 westbound on ramp from I-495 northbound and southbound will be closed overnight on Monday, November 2 from 11:30 PM to 5:00 AM the following morning. During this overnight closure, the following detour will be in place:
- Take I-90 eastbound to Exit 111 (Route 9 East Framingham) to reverse direction at Country Club Lane back onto I-90 westbound.
Finally, the I-90 eastbound ramp to I-495 northbound (Exit 106) will be closed on Tuesday, November 3 from 11:00 PM to 5:00 AM the following morning. During this overnight closure, the following detour will be in place:
- Take I-495 southbound to Exit 54A (West Main Street Hopkinton) to reverse direction back onto I-495 northbound.
I-495 Northbound Traffic Shift
The traffic on I-495 northbound at Flanders Road in Westborough was shifted to its final alignment the evening of Wednesday, October 28. The new alignment maintains three travel lanes on I-495 northbound over Flanders Road and provides an auxiliary lane between the ramp from I-90 westbound to the ramp to Route 9 eastbound.
I-495 Northbound Ramp Relocation
Exit 58 from I-495 northbound to I-90 east and westbound was shifted approximately 1,000 feet north of its previous location. View a map of the new alignment. The ramp will remain in this temporary location through December.
I-90 Westbound Traffic Shift
The traffic on I-90 westbound was shifted to its new temporary alignment overnight on Thursday, October 1. As part of this work, traffic was shifted to the north between the I-495 overpass and the I-90 bridge over Whitehall Brook. The new alignment is expected to be in place for approximately one year.
I-495 Traffic Crossover
- The project team has completed the 495 over Railroad superstructure and is completing barrier and pavement installation in support of the upcoming Southbound traffic shift.
- The project team opened Exit 58 (from I-495 South to I-90 East and West) on July 10, 2026.
- Traffic on I-495 southbound was shifted to its final alignment on August 4, 2026. I-495 southbound is fully open with three lanes of traffic.
Ramp from I-90 Westbound to I-495 Southbound and Northbound
The new ramp connection from I-90 westbound to I-495 southbound and northbound is now open. Motorists on I-90 westbound will now have two exits to access I-495. The first exit will be for I-495 Southbound (Exit 106A); you can view the alignment on this map. On September 19, 2026, the second exit for I-495 northbound (Exit 106B) opened. You can view a map of the new ramp.
I-90 Eastbound Lane Shift
On Sunday, August 30, traffic on I-90 Eastbound was shifted to its new temporary alignment. The new alignment is expected to remain in place until mid-2027 when the third phase of the Railroad Bridge structure is completed.
Overnight Lane Closures on I-90 and I-495
- Lane closures are ongoing during overnight hours. At least one lane in each direction on both I-495 and I-90 will remain open at all times.
Fruit Street Bridge
- Phase 1 of the construction of the Fruit Street Bridge was completed in 2024. Phase 2 of the Fruit Street Bridge construction process began in Summer 2024 and concluded in Fall 2025.
- Two-way traffic on Fruit Street reopened on December 11, 2025. Some bridge and sidewalk work is ongoing and is projected to be completed by Fall 2026.
I-90 Construction
- Phase 1 of the 90 over Railroad Bridge structure is complete and the Design Build Team has progressed to the Phase 2 along the westbound shoulder. Westbound traffic on I-90 shifted to the new Railroad Bridge structure on August 18, 2026. This traffic shift is expected to remain in place until mid-2027.
- Work over Whitehall Brook is ongoing. Phase 1 is complete. Traffic on I-90 westbound was shifted as part of Phase 2 in Fall 2025. Phase 2 is projected to be completed by Summer 2026. Phase 3, when traffic will shift to the median, will begin after the conclusion of Phase 2.
- The widening of the eastbound shoulder from Whitehall to the toll plaza is complete.
Old Toll Plaza/Ramp from I-90 East to I-495 North
- Installation of the culvert and I-90 eastbound to I-495 northbound substructure is ongoing and will continue through the end of the project.
Flanders Road Bridge
- Phase 1 of Flanders Road bridge construction was completed and opened in Fall 2024.
- Phase 2 substructure work is complete. The superstructure work is ongoing and is projected to be completed by Fall 2026.
Ramp from I-495 South to I-90 East and West (Exit 58)
- On August 4, 2026, the connection to the I-90 eastbound and westbound on-ramp (Exit 58) from I-495 southbound was moved approximately 1,000 feet south to its permanent location. You can view the new alignment on this map.
- Work has commenced on the permanent retaining wall along the northbound shoulder.
Construction activities are weather dependent and subject to change without notice.
Traffic and staging considerations
The project will involve complete replacement of the interchange. To avoid traffic impacts, the project will:
- Maintain 3 lanes on mainlines, except for short-term closures during approved off-peak hours
- Maintain all ramp connections between I-90 and I-495, including along temporary alignments
- Maintain proper signage and markings
- Provide temporary roadway lighting along ramps for safe nighttime travel
- Provision of safe construction access/egress
- Maintain resident and local business access/egress