Transport Research International Documentation (TRID) https://trid.trb.org/ en-us Copyright © 2026. National Academy of Sciences. All rights reserved. http://blogs.law.harvard.edu/tech/rss tris-trb@nas.edu (Bill McLeod) tris-trb@nas.edu (Bill McLeod) Transport Research International Documentation (TRID) https://trid.trb.org/Images/PageHeader-wTitle.jpg https://trid.trb.org/ Life-cycle Economic Comparison of Common Signpost Materials and Types https://trid.trb.org/View/767794 Mon, 12 Dec 2005 14:50:04 GMT https://trid.trb.org/View/767794 LIFE CYCLE ECONOMIC COMPARISON OF COMMON SIGN POST MATERIALS AND TYPES https://trid.trb.org/View/753778 Thu, 31 Mar 2005 00:00:00 GMT https://trid.trb.org/View/753778