Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Built Environment (hierarchy name)
4. Single Built Works (hierarchy name)
5. single built works (built environment)
6. [single built works by specific type]
7. [single built works by function]
8. transportation structures

Anotations

Scope note:

General term for facilities that allow the movement of people and goods from one location to another, including rails, roads, bridges, and other facilities for air, rail, road, water, cable, pipeline, and space transport and travel.