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.
Daytime construction work is starting soon on July 17th! Construction work on Balfour Road with potential lane closures will occur either on weekdays between 5 am and 5 pm or on weeknights between 8 pm and 5 am. Please see below for construction hours on both Balfour Road and Highway 4. One lane in each direction will remain open at all times on Balfour Road.
Construction signs are in place along Highway 4 and Balfour Road. Please anticipate delays during your regular commute.
Upcoming Construction Activities*
- Mondays – Thursdays: Day work from 5 am – 5 pm or Night work from 8 pm – 5 am
- Fridays – Saturdays: Day work from 5 am – 5 pm on Fridays or Night work from 8 pm Fridays – 8 am Saturdays
- Daytime pile driving will be starting in late July on weekdays, beginning at 7 am. There will be an increase in noise level while this activity is being performed.
Highway 4 Eastbound:
- Mondays – Thursdays: Night work from 9 pm – 5 am
- Fridays: Night work from 10 pm – 6 am Saturdays
- Saturdays: Night work from 9 pm Saturdays – 8 am Sundays
Highway 4 Westbound:
- Mondays – Thursdays: Night work from 8 pm – 4 am
- Fridays: Night work from 9 pm Fridays – 7 am Saturdays
- Saturdays: Night work from 8 pm Saturdays – 8 am Sundays
*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.