Research in Progress (RIP) https://rip.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) Research in Progress (RIP) https://rip.trb.org/Images/PageHeader-wTitle-RIP.jpg https://rip.trb.org/ Calculating Pile Downdrag: Experimental and Numerical Investigations https://rip.trb.org/View/1751128 Tue, 10 Nov 2020 15:27:08 GMT https://rip.trb.org/View/1751128 Proposed AASHTO Specifications for Design of Piles for Downdrag https://rip.trb.org/View/1682279 Mon, 03 Feb 2020 19:57:55 GMT https://rip.trb.org/View/1682279 Drag Reduction Proof of Principal Research https://rip.trb.org/View/1236226 Thu, 03 Jan 2013 15:43:17 GMT https://rip.trb.org/View/1236226