The Contra Costa Transportation Authority (CCTA) is beginning construction of the new Balfour Road Interchange at Highway 4. The Balfour Road and Highway 4 intersection is currently signalized, resulting in traffic backups during peak commute times. This project will replace the at-grade intersection with a new interchange at this location.
This is the final phase of bypass construction to improve traffic flow on Highway 4. The bypass projects on Highway 4 were developed cooperatively among the Contra Costa Transportation Authority, and the cities of Brentwood, Antioch, and Oakley to ease traffic congestion along Highway 4. To view a video rendering of the interchange, please watch below.
To view more video renderings, please visit Videos.
The new overpass will:
- Reduce traffic congestion
- Enhance motorist, cyclist and pedestrian safety
Nighttime construction work, closures, and detours will occur between 8pm and 5am. Please be advised of construction signs along SR 4 and Balfour Road. Please anticipate delays during your regular commute.
Upcoming Nighttime Construction Activity
- Reduced lanes on Balfour Road during the hours of 8pm and 5am on weeknights through the end of May. One lane in each direction will remain open at all times.*
*All construction work subject to weather conditions.
Costs and Funding
The total construction budget is $42.7 million. Funding sources for this project include Measure J, the East Contra Costa Regional Fee and Financing Authority (ECCRFFA), and Contra Costa Water District (CCWD).
Construction will begin in Spring 2017 and is expected to be complete in late 2019. Check back here for future updates on construction activities and traffic detours.
To download a fact sheet about the Balfour Road Interchange project, please click below.
To sign up for the project notification list, please email BalfourRoadInterchange@gmail.com.
Questions? Call the project hotline at: (925) 756-0721
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