NHTSA Header Logo NHTSA Header Logo
New Search Browse Advanced Search Search History Marked Records TRT Help Return to NHTSA

Transportation Research Thesaurus

 TRT Home | Hierarchical View | Alphabetical View | Download | About
Each term in the TRT is assigned a unique notational code that conveys its location within the hierarchy. The first letter of the notation represents the facet or top term. Using the notational code it is easy to determine the terms relation in the hierarchy. The term's parent (Ae) will have one less letter (from the right end) as the term (Aea). Siblings (Aeg, Aes) will have the same notational code as the term except the last letter will be different. Children (Aeac, Aeah) will have one letter appended to the end of the notational code of the term.

Hierarchical Display

Top Terms> Transportation operations > Freight and passenger traffic > Freight traffic

Bf: Freight and passenger traffic
Bfb: Freight traffic
 Bfbe: Container traffic
 Bfbg: Back haul
Click to expand Bfbj: Traffic loads
Click to expand Bfbm: Freight traffic measurement

Use For:
Goods movement
 
Cross Reference:
Bha: Commodity flow
Bn: Shipments
 
Broader Term:
Bf: Freight and passenger traffic
 
Related Terms:
Bfh: Passenger traffic
Web Policies & Notices  |   Terms of Use  |   FOIA  |   Privacy Policy  |   Cookie Policy  |   Accessibility  |   Email NHTSA
Plug-ins: PDF Reader | Flash Player | Excel Viewer | PowerPoint Viewer | Word Viewer | WinZip
Powered by NTL Integrated Search