Yes, motorcycles are allowed to ride in the carpool (High Occupancy Vehicle, or HOV) lanes in California. The California Vehicle Code allows motorcycles to use the carpool lanes regardless of the number of occupants in the vehicle. This privilege is granted to motorcycles as a way to promote efficient use of road space and reduce traffic congestion.
Motorcyclists should always exercise caution and follow the relevant traffic laws and regulations while using the carpool lanes.