By Public Transport: San Diego is served by the trolley (which covers downtown, outlying neighbourhoods, some suburbs to the east and south), a bus network throughout San Diego County, Amtrak and Coaster trains which connect San Diego with Los Angeles, Orange County, San Bernardino and Ventura.
By car: The city has a plethora of highways and freeways, including Interstate 5 which runs south to Tijuana and north to the Canadian border, Interstate 8 which travels to Arizona, and Interstate 15 which also goes as far as Canada via Salt Lake City. Like LA, the city suffers from congestion at peak times. The majority of visitors will hire cars, see our car rental recommendations.
The city also has a lot of cycle routes.