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. [service and utility vehicles]
11. emergency vehicles

Anotations

Scope note:

Vehicles designed to carry ladders and other gear that does not fit on the main firefighting engines, historically horse-drawn but now motor vehicles, usually tractor-trailers, equipped with long extensible ladders.