(Route 3/Route 6/Route 2) over MBTA Redline Tunnel
The Massachusetts Department of Transportation is replacing the bridge superstructure which carries Alewife Brook Parkway, US Route 3, Route 16, and Route 2 over the MBTA Redline tunnel in Cambridge, MA.
What you need to know
This project is replacing the bridge superstructure which carries Alewife Brook Parkway, US Route 3, Route 16, and Route 2 over the MBTA Redline tunnel in Cambridge.
The bridge is currently safe for travel, but considering the condition of the superstructure, MassDOT is carrying out this project with the following goals:
Improve the safety and capacity of the bridge.
Limit impacts to roadway users, abutting properties, and path networks.
MassDOT and HNTB developed the project design from 2021-2025. The MassDOT Highway Division is managing construction of the project. The project was awarded to Northern Construction in December 2026.
