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/ Research for AASHTO Standing Committee on Highways. Task 412. Adjustments to the Superpave Volumetric Mixture Design Procedure for Selecting Optimum Asphalt Content https://rip.trb.org/View/1491277 Mon, 11 Dec 2017 20:09:59 GMT https://rip.trb.org/View/1491277 Development of Rational CPCD Pavement Design Procedures https://rip.trb.org/View/1486015 Fri, 20 Oct 2017 10:05:20 GMT https://rip.trb.org/View/1486015