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/ Field Friction Testing https://rip.trb.org/View/2672003 Wed, 18 Feb 2026 14:27:59 GMT https://rip.trb.org/View/2672003 Tools to Improve the Durability of Asphalt Pavements https://rip.trb.org/View/2607896 Wed, 08 Oct 2025 11:34:56 GMT https://rip.trb.org/View/2607896 High-Polymer Asphalt Binder and Asphalt Mixture for Enhanced Durability and Cost-Effectiveness in Urban Transportation Infrastructure https://rip.trb.org/View/2475695 Fri, 20 Dec 2024 19:46:47 GMT https://rip.trb.org/View/2475695 The Utilization of Waster Plastic as a Polymer Modifier for Asphalt Binders https://rip.trb.org/View/2387099 Mon, 03 Jun 2024 14:46:17 GMT https://rip.trb.org/View/2387099 Evaluate Effects of Recycled Asphalt Pavement (RAP) on Performance-Graded (PG) Binder Polymer Concentration https://rip.trb.org/View/2372843 Fri, 26 Apr 2024 10:16:54 GMT https://rip.trb.org/View/2372843 Developing a Balanced Mix Design (BMD) Framework for SBS Modified Dense-Graded Asphalt Surface Mixtures – Phase I https://rip.trb.org/View/2361932 Mon, 01 Apr 2024 12:41:17 GMT https://rip.trb.org/View/2361932 A Field Evaluation of the Perpetual Pavement Concept https://rip.trb.org/View/1729513 Mon, 17 Aug 2020 16:24:59 GMT https://rip.trb.org/View/1729513 Impact of Polymer Modification on Mechanical and Viscoelastic Properties https://rip.trb.org/View/1357220 Thu, 11 Jun 2015 01:01:22 GMT https://rip.trb.org/View/1357220 Nano-Engineered Polyurethane Resin - Modified Concrete https://rip.trb.org/View/1318018 Fri, 01 Aug 2014 01:15:16 GMT https://rip.trb.org/View/1318018 Laboratory Evaluation of Thin and Modified Asphalt Overlay Mix Design Procedures https://rip.trb.org/View/1234324 Thu, 03 Jan 2013 15:10:30 GMT https://rip.trb.org/View/1234324 PPRC 11 SPE: Laboratory and Accelerated Pavement Testing (APT) of Gap-Graded Rubberized Mixes (Hot Mix Asphalt and Warm Mix Asphalt) for the Department of Resources Recycling and Recovery (CalRecycle) https://rip.trb.org/View/1234192 Thu, 03 Jan 2013 15:08:18 GMT https://rip.trb.org/View/1234192 Re-Road: End of Life Strategies of Asphalt Pavements https://rip.trb.org/View/1229785 Thu, 03 Jan 2013 13:48:36 GMT https://rip.trb.org/View/1229785