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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> Facilities > Transportation, hydraulic and utility facilities > Highway facilities > Roads > Parts of roads > Traffic lanes > Speed change lanes > Passing lanes

Pmrcpmt: Speed change lanes
Pmrcpmtp: Passing lanes

Find documents having Passing lanes

Broader Term:
Pmrcpmt: Speed change lanes
 
Related Terms:
Pmrcpmtb: Acceleration lanes
Pmrcpmtd: Deceleration lanes
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