Construction look-ahead: August 24 - September 23, 2026
This is a brief overview of construction operations and impacts for the Allston Preservation Project. MassDOT will provide additional notices as needed for high-impact work and changes to traffic configurations beyond those described below.
Current construction status
On the I-90 Viaduct in Allston, the contractor continues with repairs to concrete barriers and median and roadway expansion joints, and structural steel. Crews are also continuing to install lighting upgrades, and cleaning and painting of the steel bridge structure.
On Cambridge Street over I-90, the contractor continues with concrete substructure repair work and the installation of bridge shielding. Demolition of the outbound (west) sidewalk began on August 17 and continues this month. Crews are also measuring bridge steel in preparation for upcoming repairs at the west abutment.
Travel impacts
Drivers should expect lane closures on the I-90 eastbound and westbound on-and-off-ramps to and from I-90 eastbound and westbound, and on Cambridge Street as required.
Pedestrian and bicycle access will be maintained throughout construction.
Scheduled work
I-90 Viaduct
Work within the project area around the bridge carrying I-90 over MBTA will entail:
- Concrete repairs at median and barriers.
- Expansion joint repairs including forming, demolition and concrete placement.
- Structural steel and bearing repairs.
- Cleaning and painting structural steel.
- Upgrade to existing lighting system to increase lighting levels.
Cambridge Street over I-90
Work within the project area carrying Cambridge Street over I-90 will entail:
- Concrete substructure repair work.
- Installation of new bridge shielding.
- Installation of formwork for new sidewalk construction.
- Demolition of the old outbound sidewalk began on August 17.
- Field measurements for upcoming steel repairs.
Work hours
Daytime Hours: Monday through Friday from 6:00 a.m. to 6:00 p.m.
Nighttime hours: Monday through Saturday from 9:00 p.m. to 6:00 a.m. as required
Note that Federal holidays may impact typical work schedules. Work on the roadway will be paused from 5:00 AM on Friday, September 4 through Tuesday, September 8 at 9:00 PM for Labor Day. Work is weather dependent and subject to change without notice.
Travel tips
Drivers should pay attention to all signage and move carefully through the work zone. Police details, lane markings, temporary barriers, traffic cones, signage, and other tools will be used to control traffic and maintain safe work zones.