Commentary
The California Department of Transportation, affectionately known as Caltrans, divides the state up into 12 districts. District 12, Orange County, is a region to itself, with 34 cities. The Bay Area, District 4, includes nine counties that touch San Francisco Bay and holds 101 cities, more than one-fifth of California’s cities. The counties are Alameda, Contra Costa, Marín, Napa, San Francisco, San Mateo, Santa Clara, Solano, and Sonoma.
