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Projects

To use the interactive map below, touch or click along the Highway 4 corridor to show a project detail map. Touch or click the project detail map to be directed to an individual project page for more information.




The Highway 4 projects include improvements that will help revitalize eastern Contra Costa County. The projects expand Highway 4 from four to eight lanes between Loveridge Road and SR-160, and add a BART extension from Pittsburg to Antioch. This will greatly improve transit accessibility for the region and help reduce traffic congestion and enhance the quality of life for the more than 250,000 residents of eastern Contra Costa County. The projects have been carefully staged to keep 130,000 vehicles per day moving as major construction and demolition work continue, and include over $1.3 billion in State, Federal, Contra Costa Measure C & J sales tax, MTC, and other local funds.

Bart

Loveridge Road
CONSTRUCTION ALLOCATED BUDGET: $74.1 million
SCHEDULE: Construction began in June 2010 and was completed in June 2014.
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Somersville Road / Auto Center Drive
CONSTRUCTION ALLOCATED BUDGET: $40.7 million
SCHEDULE: Construction began in March 2011 and was completed in December 2013.
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Contra Loma Boulevard / L Street
CONSTRUCTION ALLOCATED BUDGET: $48.7 million
SCHEDULE: Construction began in March 2012 and is expected to be complete in fall 2015.
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Lone Tree Way / A Street
CONSTRUCTION ALLOCATED BUDGET: $59.8 million
SCHEDULE: Construction began in August 2012 and is expected to be complete in spring 2016.
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Hillcrest Avenue
CONSTRUCTION ALLOCATED BUDGET: $56.1 million
SCHEDULE: Construction began in March 2013 and is expected to be complete in summer 2016.
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Sand Creek Road Interchange
CONSTRUCTION ALLOCATED BUDGET: $37 million
SCHEDULE: Construction began in June 2012 and was completed in October 2014.
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Balfour RoadClose project detail map

I 680 / Highway 4 InterchangeClose project detail map

SR160 / Highway 4 Connector Ramps
PROJECT ALLOCATED BUDGET: The project is funded entirely by $50 million in Bridge Toll Funds.
SCHEDULE: Construction began in March 2014 and is expected to be complete in mid-2016, weather depending.
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Mokelumne Trail Bicycle/Pedestrian Overcrossing
PROJECT ALLOCATED BUDGET: $3.4 million
SCHEDULE: Final design is underway. Construction funding for the project has not yet been identified.
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