California Department of Transportation (CalTrans) (Oakland, California)

 transportation services, department - administrative division

District 4
111 Grand Avenue
Oakland, CA
(510) 286-4444
www.dot.ca.gov/dist4/

The State of California, Department of Transportation (Caltrans) is responsible for the design, construction, maintenance, and operation of the California State Highway System, as well as that portion of the Interstate Highway System within the state's boundaries.

Caltrans has divided the state of California into 12 districts supervised by district offices. Most districts cover multiple counties; District 12 (Orange County) is the only district with one county. The largest districts are District 4 (San Francisco Bay Area) and District 7 (Los Angeles and Ventura counties). As a state agency, its main headquarters are located in Sacramento, which is covered by District 3.