Proposed Traffic Improvements

Green Street Connector

BXP’s rezoning overlay approval advances the Green Street Connector project, providing a new connection between Route 117 and Route 20 and enhancing overall traffic circulation in the area. 

Construction Phases

Phase 1: Green Street Connection

$30M infrastructure investment supported by $15M Infrastructure Grant from the State, with a match from BXP. Procurement and selection of a general contractor for the construction of the roadway improvements at Green Street is underway in coordination with the City of Waltham, with mobilization targeted for early 2027. It is an approximately 2-year construction project. 

Phase 2: The Route 117 Bridge

The Route 117 bridge will be reconstructed by the State following completion of Green Street. The prospective start is 2029. 

The proposed Green Street Connector will provide safe active transportation facilities and connections to the community, supporting City and State Complete Streets policies and a planned DCR bike path project. The new connection between Main Street and Weston Street will reduce traffic congestion and improve safety and mobility between Main Street and Weston Street, while pulling commercial traffic away from residential areas in the Stow Street and Cedarwood neighborhoods. Specific scope elements include: 

  • The construction of a bridge carrying Green Street over the I-95 southbound Exit 41 off-ramp 

  • Ramp/signal improvements on Weston Street 

  • Signal modifications on Main Street 

  • A new signal at the Route 20 interchange 

  • Utility improvements 

  • Active transportation improvements for pedestrians and bikes 

These improvements are part of a multi-phase series of transportation infrastructure projects that will transform connectivity in west Waltham to ensure that roadway networks support all travel modes, reduce congestion, and improve safety.