Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment (hierarchy name)
4. Transportation Vehicles (hierarchy name)
5. vehicles (transportation)
6. land vehicles
7. [land vehicles by form]
8. freewheeled vehicles
9. [freewheeled vehicles by form or function]
10. passenger vehicles

Anotations

Scope note:

Foot-propelled vehicles with, usually, two wheels in tandem, a low footboard on which the rider stands set between the wheels, and a handlebar for steering, generally mounted on a vertical post; for similar, but larger and heavier, motorized vehicles, use "motor scooters."