Motor vehicle
Motor vehicle means any vehicle which is self-propelled, other than:
(1) A vehicle operated on rails; and
(2) Any wheelchair or mobility device, including one that is battery-powered, that is designed solely for use by a mobility-impaired person for locomotion and that is suitable for use in an indoor pedestrian area.
Source
36 CFR § 261.2
Scoping language
The following definitions apply to this part: