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/ The Effect of Pressurized Hydrogen Gas on the Fatigue Properties of the Heat-Affected Zones in X52 and X70 Pipelines https://rip.trb.org/View/1371558 Mon, 12 Oct 2015 11:40:01 GMT https://rip.trb.org/View/1371558 Improved Performance of Concrete in Rigid Pavements and Other Transportation Structures Through Modeling of Cement Hydration https://rip.trb.org/View/1369873 Mon, 21 Sep 2015 15:59:50 GMT https://rip.trb.org/View/1369873