(a) A “pedestrian” is a person who is afoot or who is using any of the following:
(1) A means of conveyance propelled by human power other than a bicycle.
(2) An electric personal assistive mobility device.
(b) “Pedestrian” includes a person who is operating a self-propelled wheelchair, motorized tricycle, or motorized quadricycle and, by reason of physical disability, is otherwise unable to move about as a pedestrian, as specified in subdivision (a).