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The original item was published from 3/24/2021 5:45:39 PM to 11/2/2021 12:00:01 AM.

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Public Works News Flash

Posted on: March 24, 2021

[ARCHIVED] Construction on Bailey Road/State Route 4 Interchange

Contra Costa County Public Works to Begin Construction on the

Bailey Road/State Route 4 Interchange Pedestrian & Bicycle Improvement Project


March 24, 2021, Bay Point, CA – The Contra Costa County Public Works Department will begin construction on the Bailey Road/State Route 4 (SR4) Interchange Pedestrian and Bicycle Improvement Project on Monday, March 29, 2021 through October 2021, barring unforeseen circumstances. Work will occur Monday through Friday, between 7 a.m. and 4 p.m., weather permitting. Construction will be scheduled to minimize impacts to commute traffic. Drivers should expect delays and detours during construction. Current social distancing protocol will be observed. 


The work will consist of removing the SR4 westbound loop off-ramp and pedestrian tunnel, as well as squaring-up the intersections of SR4 eastbound on and off-ramps, and removing the free right turns. Work also includes widening the SR4 westbound diagonal off-ramp, installing a traffic signal for traffic to go north and south bound on Bailey Road, modifying existing traffic signals, installing storm drain modifications, installing sidewalk along Bailey Road, and overlaying the pavement on Bailey Road within the interchange area. 


Funding for this project is provided by a federal Active Transportation Program grant and local road funds made up of gas tax revenues provided by the SB1 Road Repair and Accountability Act, Navy Mitigation funds and Keller Canyon Mitigation Funds. More information for this project can be found at  

About Contra Costa County Public Works Department:

Contra Costa County Public Works Department (CCCPWD) maintains over 660 miles of roads, 150 miles of streams, channels and other drainage and over 200 County buildings throughout Contra Costa County. CCCPWD provides services such as Parks and Recreation, Sand Bag Distribution and Flood Control throughout unincorporated areas of Contra Costa County. For more information about CCCPWD, please visit us at

Bailey Road-State Route 4 Interchange Work Site Map 3 24 21Contact: Mauricio Rivera 510.774.8994 or Jenna Caldwell 925.313.2020 




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