Caltrans and the Contra Costa Transportation Authority (CCTA) has begun the next phase of State Route 4 (SR-4) Widening Project in Contra Costa County, California, which will entail a cost of $63 million.
The entire SR-4 widening project is anticipated to cost more than $554 million. The work has been staged in five phases and involves widening of the SR-4, interchanges, and local roadways from west of Loveridge Road to the State Route 160 interchange.
The CCTA, to accomplish work in this phase, received a grant of $26.7 million from Proposition 1B, a transportation bond approved by the voters in 2006. Construction on the project will be done by CC Myers Incorporated.
After widening of the SR-4, BART will add a new mass transit service to eastern Contra Costa County in the widened highway’s median. The SR-4 widening project in conjunction with Bay Area Rapid Transit (BART) project represent a combined investment of more than $1 billion, which will alleviate traffic congestion problem in one of the most congested corridors in the Bay Area.