Although public transportation coverage is very poor in most of inland San Diego County, it is pretty decent along the coast. I am fortunate to live near a superb 7-year-old commuter-oriented heavy rail line (
www.gonctd.com), and when my company hired me and opened up a San Diego office, one of my coworkers found a space near another station on the line. Thanks to my influence and that of one of the San Francisco-based bike-and-BART-riding hired consultants, the trains feature roll-on accommodations for two to six bicycles per coach.
My stress-free commute now comprises my choice of an 11+-mile/18km bike ride on mostly-decent roads and bike lanes, or a 2km walk/jog from home to the station, a 15-minute ocean view train ride, and a 2km walk/jog to my office. (Now that we have an active beach sand replenishment program, I should try taking the shoreline detour on the way home. Life's tough ...)
I am looking forward to the extension of the San Diego trolley / light rail system to the SDSU campus, which is accessed via particularly bicycle- and pedestrian-hostile freeway-style streets with high-speed merges and diverges.