Status
The project was advertised under MassDOT’s Design-Build Program and awarded to D. W. White Construction, Inc. and TranSystems in November 2022. MassDOT announced the project’s completion in December 2025.
Weather and unexpected circumstances make all construction activities subject to change without notice, but we will do our best to keep you updated.
2025 construction season impacts
During the 2025 construction season, crews will be conducting construction activities, including the installation of the Oxbow Road roundabout, which may have traffic impacts, such as single lane closures on Route 20. We will update this page with any further traffic impacts.
Route 20 reconstruction project completion
MassDOT has announced completion of The Route 20 Reconstruction Project has as of December 2025. All roadway and bridge improvements along Route 20 from Richardson’s Corner Road in Charlton to the Route 12 intersection in Oxford, including the Route 20 roundabout, are now in their final configuration. Bikers and pedestrians now have complete access all shared use paths and sidewalks along the project area.
Roundabout at Oxbow Road Opened in October 2025
The new roundabout on Route 20 at Oxbow Road fully opened to two lanes of traffic on October 8, 2025. When entering the roundabout, always yield to traffic already in the roundabout and enter only when there is a safe gap in traffic.
Approaching from Route 20 Eastbound:
- To stay on Route 20 Eastbound, use either lane to take the first exit to continue on Route 20 Eastbound.
- To reverse direction and travel on Route 20 Westbound, stay to the left when entering the roundabout and use the left lane. Take the third exit to travel on Route 20 Westbound.
- To travel on Oxbow Road, stay to the left when entering the roundabout and use the left lane to take the second exit to travel on Oxbow Road.
Approaching from Route 20 Westbound:
- To stay on Route 20 Westbound, use either lane to take the second exit to continue on Route 20 Westbound.
- To reverse direction and travel on Route 20 Eastbound, stay to the left when entering the roundabout and use the left lane. Take the third exit to travel on Route 20 Eastbound.
- To travel on Oxbow Road, stay to the right when entering the roundabout and use the right lane to take the first exit to travel on Oxbow Road.
Approaching from Oxbow Road:
- To travel onto Route 20 Westbound, stay to the right to use the right lane, then take the first exit.
- To travel onto Route 20 Eastbound, take the second exit.
The temporary closure of Oxbow Road at Route 20, across from Arnie’s Towing, is now lifted and is now reopened.
Roundabout travel tips
The roundabout on Route 20 at Oxbow Road was installed to address traffic and safety concerns in the area as well as to provide access to Oxbow Road and a location between Route 56 and Richardson Corner Road that allows vehicles to make a U-turn. Read more about roundabouts on the Federal Highway Administration website.
MassDOT would like to offer some tips for traveling through the new roundabout:
- Slow down and follow the posted advisory speeds as you approach the roundabout.
- Yield to traffic already in the roundabout and enter only when there is a safe gap in traffic.
- Be sure to allow extra space for trucks and large vehicles.
- Use your turn signal when exiting the roundabout.
- While inside the roundabout, keep moving and only stop unless necessary to keep traffic flowing smoothly.
- Please pay attention to all signage.
Tips for trucks and large vehicles
MassDOT would like to share additional tips for oversized trucks and other large vehicles traveling through the roundabout:
- Enter and exit the roundabout at slower speeds to ensure the safety of other drivers traveling in the roundabout.
- If necessary, while traveling in the left lane, use the truck apron, the central raised portion of the roundabout which has been designed to accommodate large vehicles.
- Be mindful of your truck’s path, especially in the single-lane configuration.
- Allow extra space for turning and merging and be cautious of smaller vehicles.