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/ TEST AND EVALUATION OF W-BEAM AND THRIE-BEAM GUARDRAILS. FINAL REPORT https://trid.trb.org/View/273485 Wed, 31 Dec 1986 00:00:00 GMT https://trid.trb.org/View/273485 TESTING, EVALUATION, AND UPGRADING OF SAFETY APPURTENANCES https://trid.trb.org/View/196544 Fri, 30 Dec 1983 00:00:00 GMT https://trid.trb.org/View/196544 THRIE-BEAM GUARDRAILS FOR SCHOOL AND INTERCITY BUSES https://trid.trb.org/View/187769 Mon, 28 Feb 1983 00:00:00 GMT https://trid.trb.org/View/187769