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/ Validating Proposed Definitions for Comparable Pavement Cracking Data https://rip.trb.org/View/1893349 Mon, 22 Nov 2021 21:51:44 GMT https://rip.trb.org/View/1893349 Winter Maintenance Levels of Service and Performance Measures https://rip.trb.org/View/1844015 Mon, 29 Mar 2021 10:47:06 GMT https://rip.trb.org/View/1844015 Commercial Spaceflight Risk Assessment and Communication https://rip.trb.org/View/1537215 Wed, 22 Aug 2018 13:03:22 GMT https://rip.trb.org/View/1537215 Use of Complex Fluids for Enhanced Cellulosic Pre-treatment. https://rip.trb.org/View/1367710 Tue, 01 Sep 2015 11:32:39 GMT https://rip.trb.org/View/1367710