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/ Evaluation of Asphalt Rejuvenators on Asphalt Mixtures with High RAP https://rip.trb.org/View/2768413 Wed, 26 Aug 2026 17:04:22 GMT https://rip.trb.org/View/2768413 Effect of Using RAP on Gravel Roads https://rip.trb.org/View/2720399 Tue, 30 Jun 2026 15:25:11 GMT https://rip.trb.org/View/2720399 Assessing the Durability and Long-Term Performance of Rejuvenated Asphalt Mixes with RAP https://rip.trb.org/View/2646944 Mon, 05 Jan 2026 23:09:53 GMT https://rip.trb.org/View/2646944 Characterizing and Improving Binder Availability and Activity in Asphalt Mixtures with Reclaimed Asphalt Pavement (RAP) https://rip.trb.org/View/2625486 Sat, 15 Nov 2025 08:45:15 GMT https://rip.trb.org/View/2625486 Investigate the Effects of Using of Reclaimed Asphalt Pavement (RAP) as Aggregate in Seal Coats https://rip.trb.org/View/2604526 Mon, 29 Sep 2025 16:22:29 GMT https://rip.trb.org/View/2604526 Enhancing Flexible Pavement System 23 (FPS23) by Incorporating a Top-Down Cracking Model in Texas Mechanistic-Empirical Flexible Pavement Design System (TxME) https://rip.trb.org/View/2604524 Mon, 29 Sep 2025 16:12:23 GMT https://rip.trb.org/View/2604524 Increasing Asphalt Recycling In Oregon Through Improvements In Cold And Hot Mix Asphalt Production Processes https://rip.trb.org/View/2594038 Thu, 28 Aug 2025 18:01:29 GMT https://rip.trb.org/View/2594038 Determine the Optimum Dosage of Rejuvenators Based on the RAP Contents as well as the PG Grade of Recovered RAP Binder https://rip.trb.org/View/2582992 Tue, 05 Aug 2025 16:45:21 GMT https://rip.trb.org/View/2582992 Advancing High RAP Asphalt Mixtures toward Pavement Sustainability and Net Zero Carbon Emissions https://rip.trb.org/View/2582988 Tue, 05 Aug 2025 16:02:11 GMT https://rip.trb.org/View/2582988 Chip Seal for Uniform Usages https://rip.trb.org/View/2582918 Tue, 05 Aug 2025 12:00:31 GMT https://rip.trb.org/View/2582918 Development of Cement Recycled Asphalt Base Stabilization (CRABS) Design Guide for Idaho Transportation Department https://rip.trb.org/View/2560882 Tue, 03 Jun 2025 13:15:16 GMT https://rip.trb.org/View/2560882 Impact of Recycling Agent Introduction Method on Plant-Produced Asphalt Mixtures https://rip.trb.org/View/2558397 Wed, 28 May 2025 10:09:46 GMT https://rip.trb.org/View/2558397 Cracking Resistance of Alaskan Asphalt with RAP Material https://rip.trb.org/View/2512614 Fri, 21 Feb 2025 20:44:37 GMT https://rip.trb.org/View/2512614 Sieve Analysis Procedure to Quantify Reclaimed Asphalt Pavement Binder Availability https://rip.trb.org/View/2505725 Mon, 03 Feb 2025 22:33:50 GMT https://rip.trb.org/View/2505725 Design of Surface Treatments with Reclaimed Asphalt Pavement Aggregates in Nevada (NDOT 778-24-803) https://rip.trb.org/View/2502110 Mon, 03 Feb 2025 12:42:56 GMT https://rip.trb.org/View/2502110