Hearn Avenue Interchange – Phase 3

The California Department of Transportation (Caltrans), in cooperation with the City of Santa Rosa and the Sonoma County Transportation Authority (SCTA), proposes to modify and reconstruct the US 101/Hearn Avenue interchange. The project would replace the existing Hearn Avenue overcrossing bridge with a new bridge to accommodate four traffic lanes with bicycle lanes and sidewalks on both sides of the roadway. The project would also increase the bridge height clearance and improve ramp connections to US 101 and provide continuous bicycle lanes and sidewalks between Corby Avenue and Santa Rosa Avenue.

Project design

The proposed project will reconstruct the two-lane Hearn Avenue overcrossing and modify the ramps using generally the same footprint. The consultant is currently completing the design phase.

Project Schedule

Preliminary design and environmental studies Dec. 2015
Environmental document approved and design option selected Dec. 2016
Complete design April 2020
Start Construction August 2020*
End Construction July 2022*
  *Pending available funding

Recent events

June 2017 - Design - awarded consultant contract
For more information please contact:
Chris Catbagan
Associate Engineer

Project Document