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/ Update of Traffic Factor Equations for IDOT Mechanistic-Empirical Pavement Design https://rip.trb.org/View/2486928 Mon, 06 Jan 2025 12:32:41 GMT https://rip.trb.org/View/2486928 Social Life Cycle Analysis of Zero Emission Heavy-duty Trucks https://rip.trb.org/View/2414311 Thu, 08 Aug 2024 19:32:28 GMT https://rip.trb.org/View/2414311