Another attractive ground transportation option is Flexcar, which operates in certain U.S. cities. This new breed of rental car allows you to rent on an hourly basis rather than a daily basis. Be sure to register online before your trip.
Flexcar ( +1 877 353 9227 / http://www.flexcar.com )
Train
Amtrak ( +1 800 872 7245 / http://www.amtrak.com ) offers frequent services to San Diego.
Bus
San Diego is serviced by Greyhound ( +1 800 231 2222 / http://www.greyhound.com ) bus lines which provide transportation to destinations throughout America.
Car
San Diego is accessible by I-5, I-15, and US 15.
Getting Around
Public Transit
The Metropolitan Transit System ( MTS, 1+ 619 238 0100 / http://www.sdcommute.com ) offers a comprehensive system of buses, trolleys, light rail trains, and commuter trains to destinations throughout San Diego.
N.B. If traveling overseas, take the safety precaution of registering your trip at https://travelregistration.state.gov and for helpful, practical advice about traveling technicalities and safety standards check out http://travel.state.gov/