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
9. transportation buildings
10. road transportation structures

Anotations

Scope note:

Built works erected at or near border crossings where persons or vehicles are halted for examination and clearance by government officials. Posts at international boundaries used for the regulation of movement of people and goods.