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Transportation Research Thesaurus

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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> Safety and security > Accidents > Accident types > Ground transportation accidents > Traffic accidents > Collisions

Hbbgt: Traffic accidents
Hbbgtc: Collisions
 Hbbgtch: Head on collisions
 Hbbgtcr: Rear end collisions
Click to expand Hbbgtcs: Side collisions
 Hbbgtcu: Underride override collisions
 Hbbgtcw: Secondary collisions

Find documents having Collisions

Use For:
Crashes
 
Broader Term:
Hbbgt: Traffic accidents
 
Related Terms:
Hbbgta: Single vehicle accidents
Hbbgtb: Multiple vehicle accidents
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