Sonoma-Marin Area Rail Transit (SMART) is the Bay Area’s newest passenger rail service, providing a safe, reliable, and congestion-free transportation option for Marin and Sonoma counties. The 45-mile system includes stations in the Sonoma County Airport area, Santa Rosa, Rohnert Park, Cotati, Petaluma, Novato, San Rafael, and Larkspur. Future extensions are planned for Windsor, Healdsburg, and Cloverdale, completing the vision for a full 70-mile system.

Vine Transit is Napa Valley's bus service, providing safe, affordable, and convenient travel to residents, workers, and visitors. The Vine offers local fixed-route and on-demand services, community shuttles, paratransit service, and regional express bus service to BART, Amtrak, and the San Francisco Bay Ferry in Vallejo.

WestCAT is a service of the Western Contra Costa Transit Authority, which provides local, express, and regional transit service to the cities of Pinole and Hercules and the unincorporated communities of Montalvin Manor, Tara Hills, Bayview, Rodeo, Crockett, and Port Costa.

The Valley Transportation Agency (VTA) provides service throughout Santa Clara County and partners with other systems for bus and rail service between Santa Clara County and the counties of Alameda, Santa Cruz, San Mateo, and San Francisco. VTA's 520+ vehicle bus fleet serves a 326-square-mile urbanized area. The 28.6-mile light rail system is operated with a fleet of 50 cars.

Golden Gate Ferry provides daily ferry service between Larkspur or Sausalito (Marin County) and San Francisco.

County Connection (Central Contra Costa Transit Authority, or CCCTA) provides transit service within central Contra Costa County with connections to Pleasanton and Antioch. The bus routes serve Clayton, Concord, Danville, Lafayette, Martinez, Moraga, Orinda, Pleasant Hill, San Ramon, Walnut Creek, and unincorporated areas of Central County. Formed in 1980, County Connection has grown from a fleet of 12 small buses to more than 120 ramp/wheelchair lift-equipped buses.

Tri Delta Transit provides over 2,500,000 trips each year to a population of nearly 315,000 residents in the 225 square miles of Eastern Contra Costa County. Tri Delta Transit operates 14 local bus routes Monday-Friday, 4 local bus routes on weekends, on-demand ride share service Tri MyRide, Express Route 300 commuter route, and a paratransit door-to-door bus service for senior and disabled individuals.

Santa Rosa CityBus operates 17 regular routes, primarily within the City of Santa Rosa. Hours of operation are 6:00 AM to 8:25 PM Monday through Friday; 6:00 AM to 8:15 PM on Saturday; and 10:00 AM to 5:15 PM on Sunday.