Byron Highway/Camino Diablo Intersection Improvement Project

Project Information

Byron Highway and Camino Diablo are heavily used truck routes and provide a vital transportation link between Contra Costa and Alameda Counties.  This intersection has been number one on the County's Signal Priority List since 2001.

Project No.: 0662-6R4094

Project Description

The Byron Highway / Camino Diablo Intersection Improvement Project will install a new traffic signal with pavement widening for three of the four legs of the intersection. Union Pacific Railroad will also improve the railroad crossing at Camino Diablo by installing new railroad panels and railroad crossing gates.  The project will also provide pedestrian facilities along Camino Diablo from the intersection of Main Street to Byron Highway.

Supervisory District:
Thomas Brothers Map reference:
Page 673 - D3
Funding Sources:
Gas Tax, East County Regional Area Of Benefit, and High Risk Rural Road/Highway Safety Improvement Program federal grant
Funding Amount:  $3,900,000

Construction Date: 
Summer 2017
For construction information, see the Design/Construction Division's Upcoming Construction Project website or at the following link.

Community Meetings

February 17, 2011 - Presented history of Contra Costa County Public Works Department’s efforts regarding intersection.

April 19, 2012 - Presented Byron MAC with grant opportunity for intersection improvements.

February 21, 2013 - Updated Byron MAC with news of $900,000 in federal funds granted to Contra Costa County Public Works Department for Byron Highway / Camino Diablo Intersection Improvement Project.

May 15, 2014 - Updated Byron MAC; beginning environmental studies and design work.

February 19, 2015 - Updated Byron MAC; design is at 65%; environmental clearance pending; right-of-way phase to begin soon.

April 3, 2015 - Notice of Public Review and Intent to Adopt a Proposed Mitigated Negative Declaration for project environmental document filed.

April 16, 2015 - Updated Byron MAC on project.

Project Links

Fact Sheet