Transportation in San Diego County

The San Diego Trolley is a light rail that serves the metropolitan area including central San Diego, East County, South County to the border.

The San Diego Coast Express Rail, or COASTER is a forty-one-mile commuter rail line that connects North County to central San Diego. Eight stations in total are served, between Oceanside and Downtown San Diego.

The SPRINTER is a 22-mile light rail line between Oceanside and Escondido, California. Fifteen stations are served, including stops in the cities of Oceanside (western terminus), Vista, San Marcos, and Escondido (eastern terminus).

SPRINTER service is operated with Siemens Sprinter diesel multiple units manufactured in Germany, where they are widely used.

The Pacific Surfliner is a 350-mile (563 km) Amtrak passenger train route serving communities on the coast of Southern California between San Diego and San Luis Obispo with stops in Los Angeles.

Metrolink is a commuter rail network connecting major cities in Southern California including San Diego via transfers at Oceanside, Anaheim, Los Angeles, and Riverside. Metrolink does not serve the immediate San Diego area, just Oceanside in northern San Diego County.

The San Diego Metropolitan Transit System (MTS) is the public transit service provider for Central, South, and East San Diego County. MTS operating subsidiaries include the San Diego Trolley, Incorporated (SDTI) and San Diego Transit, Corporation (SDTC). San Diego Transit directly operates approximately half of all fixed-route bus services within its service area. The remainder is provided under contractual agreements with Transdev or Southland Transportation Services. Some MTS bus routes connect to Breeze services in Escondido or Ramona in the NCTD service area.

MTS also provides the MTS Access service (provided under contractual agreement with First Transit) throughout its service area. This service is a point-to-point service provided upon request by passengers who qualify for special assistance under the ADA (Americans with Disabilities Act). This service is available in most of the cities of San Diego and Poway, as well as most of the southern and eastern suburbs of San Diego, and connections are available to a similar NCTD service.

The city of Chula Vista contracts with Transdev to provide fixed-route bus service.

The North County Transit District's (NCTD) "BREEZE" operates 34 bus routes in the northern portion of the county from Del Mar, Escondido, and Ramona, to Orange County and Riverside County lines. Routes are in the 300 and 400 series (with the exception of route 101).

Bus Passes and transfers may be used both on MTS and NCTD services including the bus and the trolley, but the use of the COASTER may require an upgrade.

In addition, express buses from the Riverside Transit Agency connect Temecula with Oceanside and Escondido.

CA 79 looking north with lake Cuyamaca on the right

San Diego County has an extensive network of public roadways that allows vehicle drivers and bicyclists convenient direct access to all practical destinations in the county. Major freeways were built and repeatedly expanded to serve the needs of commuters[1] coming into the city from the suburban regions of North County, South Bay, and East County, as well as the Tijuana metropolitan area.

San Diego is the terminus of three primaries interstate highways. Interstate 5 begins at the U.S.-Mexico border and heads north to Los Angeles. Interstate 8 begins at the Sunset Cliffs Boulevard in Ocean Beach, and heads east to the Imperial Valley and Arizona. Interstate 15 begins as State Route 15 at Interstate 5 in Southeast San Diego near the 32nd Street Naval Station, becomes a formal interstate at Interstate 8 in Mission Valley, then heads northeast to the Inland Empire and then Las Vegas.

Public bikeways in San Diego County consisting of Class 1 bike paths, which are separate from the public roads, Class 2 bike lanes, which are demarcated space on the roadways designated to be used primary by bicyclists, and Class 3 bike routes, which are regular surface streets designated as being particularly attractive to bicyclists. SANDAG publishes a map that shows all of these bikeways in the greater San Diego Metropolitan area annually, and it is available at most local bike shops.