A ridesharing arrangement consists of a carpool or vanpool.
Carpools. A carpool includes 6 or fewer persons who share a commute, in which the driving is incidental to another purpose of the driver (i.e., going to work).
Vanpools. A vanpool is a nonprofit arrangement that includes 7 to 15 people including the driver. Vanpools commute between home and work, in a vehicle owned or leased and operated by an individual who owns only one such vehicle, and whose driving is incidental to another purpose. A vanpool driver may not transport people as a business, and may accept compensation only to cover expenses directly related to the vanpool. Vanpools may be owned or leased by nonprofit employee organizations, employers, public agencies, or public transit districts. Fees may be charged only to recover maintenance, administration, and reasonable depreciation costs.
Riders may not exceed the occupancy design of the vehicle, that is, may not “double up” either in carpools or vanpools.