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/ Long-Term Pavement Performance Program Standard Data Release (SDR) Number 27 https://rip.trb.org/View/1366321 Tue, 18 Aug 2015 16:38:15 GMT https://rip.trb.org/View/1366321 Long-Term Pavement Performance Program Standard Data Release (SDR) Number 25 https://rip.trb.org/View/1366320 Tue, 18 Aug 2015 16:24:32 GMT https://rip.trb.org/View/1366320 Clearance Measurement System https://rip.trb.org/View/1227861 Thu, 03 Jan 2013 13:08:14 GMT https://rip.trb.org/View/1227861