http://mtc.ca.gov/whats-happening/news/completed-state-route-160-highway-4-project-connects-commuters-antioch-bridge
The new connectors complete the interchange between CA-160 and CA-4. The new connectors serve movements from southbound CA-160 to eastbound CA-4 and from westbound CA-4 to northbound CA-160. They allow access between the Antioch Bridge and eastern Contra Costa County.
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