RCW 46.04.320: Motor vehicle.

(1) "Motor vehicle" means a vehicle that is self-propelled or a vehicle that is propelled by electric power obtained from overhead trolley wires but not operated upon rails.

(2) "Motor vehicle" includes:

(a) A neighborhood electric vehicle as defined in RCW 46.04.357;

(b) A medium-speed electric vehicle as defined in RCW 46.04.295; and

(c) A golf cart for the purposes of chapter 46.61 RCW.

(3) "Motor vehicle" excludes:

(a) An electric personal assistive mobility device;

(b) A power wheelchair;

(c) A golf cart, except as provided in subsection (2) of this section;

(d) A moped, for the purposes of chapter 46.70 RCW; and

(e) A personal delivery device as defined in RCW 46.75.010.