NGV
EV

Can I really Drive in the Carpool Lane by Myself

Yes - Recently passed legislation AB71 allows you to
drive in the carpool lane by yourself but you must
buy/lease a qualifying vehicle
List of Qualifying Vehicles
Basically, its any highway capable vehicle
powered by electricity (EV/NEV) or natural gas vehicle (NGV)

Currently Hybrid vehicles are excluded from the carpool lane - Find out the reason "Why the Toyota Prius and Honda Insight do not qualify for the single-occupant carpool lane sticker!"