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
11. carriages (vehicles)
12. [carriages by form]
13. four-wheeled carriages
14. coaches (carriages)

Anotations

Scope note:

Compact, low-hung coaches with the driver's perch outside, space for two or more passengers, and generally with a straight front; may also be used for early automobiles whose form borrowed the characteristic closed carriage-style body and open driver's area.