Measure M Projects: Local Streets

Hearn Ave. Interchange Improvements in Santa Rosa

This project would widen the Hearn Avenue Bridge and add turn lanes, widen the Santa Rosa Avenue approaches to the Hearn Interchange, and realign the ramps on the west side of the interchange.

Visit the Caltrans Project Page Here.

Additional Project Details:
The purpose of this project is to relieve traffic congestion and improve regional traffic operations, including providing multimodal access and connectivity adjacent to the Highway 101 and Hearn Avenue intersection. There are three phases, which will be constructed separately. Phase I adds turn lanes, bike lanes, and sidewalks, and widens the Santa Rosa Avenue approach to the Hearn Avenue Interchange. Phase 1 also includes traffic signal coordination, ADA accessible curb ramps, and audible pedestrian signals. Phase 2 widens Hearn Avenue from the Highway 101 Overcrossing to Dutton Avenue and adds bike lanes and shoulders. Phase III completes the project by replacing the existing Hearn Avenue Overcrossing with a wider bridge and reconfiguring the ramps. Bicycle and pedestrian needs are addressed by adding bike lanes and sidewalks on the new overcrossing. Phase 3 requires coordination with Caltrans.

Project Status / Schedule:

Phase 1 – The widening of Santa Rosa Avenue between Yolanda Avenue and Kawana Springs Road was completed in FY 2014-15.

Phase 2 – The widening of Hearn Avenue from the Highway 101 Overcrossing to Dutton Avenue was completed in FY 2010-11.

Phase 3 – Caltrans approval of the PSR was completed in FY 2012-13. In FY 2013-14 the City selected a consultant to complete the Project Approval and Environmental Document (PAED) under oversight from Caltrans. Work on the PAED phase was completed in FY 2016-17. After many failed grant applications, the project was selected to receive funding from the SB 1 Local Partnership Competitive Program. The City worked closely with SCTA, their design consultant, and Caltrans to successfully complete the design and for Caltrans to advertise the project for construction. The project started construction in FY 2024.  By cooperative agreements with the City and Caltrans, SCTA is overseeing the construction phase of the project and Caltrans will manage the construction contract. Construction is expected to be complete in FY 2026-27 with an additional three years of plant establishment and mitigation monitoring.

Current Funding Plan and Measure M Programming (in thousands):

Phase Total Measure M-LSP City Need
1 $8,042 $1,300 $6,742 $0
2 $1,825 $500 $1,325 $0
3 $45,675 $19,200 $26,475 $0
Totals $55,542 $21,000 $34,542 $0

*City funds include: development fees, Prop 1B, Senate Bill 1 Local Partnership Program, State Improvement Program (STIP), Redevelopment Agency (RDA) funds, and gas taxes.