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/ Development of Performance Measures for Pothole-Patching Cold Asphalt Mix Materials for Safe and Sustainable Transportation https://rip.trb.org/View/2627349 Wed, 19 Nov 2025 14:17:20 GMT https://rip.trb.org/View/2627349 Increasing Asphalt Recycling to Reduce Paving Costs, Improve Pavement Longevity, and Reduce Environmental Impact https://rip.trb.org/View/2593927 Thu, 28 Aug 2025 11:05:37 GMT https://rip.trb.org/View/2593927 Effectiveness of Warm Mix Asphalt Additives as Compaction Aid in Cold Regions Through Application of Wireless Sensors and Performance Tests https://rip.trb.org/View/2534934 Mon, 07 Apr 2025 16:18:04 GMT https://rip.trb.org/View/2534934 Performance-Based Design of Permeable Friction Courses Using Warm Mix Asphalt for Enhanced Safety and Durability https://rip.trb.org/View/2480326 Wed, 01 Jan 2025 13:45:25 GMT https://rip.trb.org/View/2480326 Field Validation of Warm Mix Asphalt at Reduced Production Temperatures for Balanced Mix Design https://rip.trb.org/View/2414324 Fri, 09 Aug 2024 15:23:30 GMT https://rip.trb.org/View/2414324 Development of Quality Standards for Inclusion of High Recycled Asphalt Pavement Content in Asphalt Mixtures - Phase V https://rip.trb.org/View/2342172 Tue, 20 Feb 2024 18:02:28 GMT https://rip.trb.org/View/2342172 2288 Long Term Performance and Benefits of Combined Balanced Mix Design and Chemical WMA Technology https://rip.trb.org/View/1847759 Tue, 20 Apr 2021 10:43:14 GMT https://rip.trb.org/View/1847759 Feasibility Assessment of Warm Mix Asphalt in Arkansas https://rip.trb.org/View/1751152 Tue, 10 Nov 2020 20:08:19 GMT https://rip.trb.org/View/1751152 The Effects of Recycling Agents on Asphalt Mixtures with High RAS and RAP Binder Ratios https://rip.trb.org/View/1695720 Mon, 30 Mar 2020 17:11:21 GMT https://rip.trb.org/View/1695720 Increase Use of Sustainable Practices in Pavement Infrastructure: Full-scale Evaluation https://rip.trb.org/View/1515833 Wed, 13 Jun 2018 14:18:19 GMT https://rip.trb.org/View/1515833 Continuation of Field Aging Effects on Asphalt Mixed at Different Temperatures and Hauled Different Distances Phase III https://rip.trb.org/View/1508233 Mon, 09 Apr 2018 14:01:54 GMT https://rip.trb.org/View/1508233 Design and Analysis Procedures for Asphalt Mixtures Containing High-RAP Contents and/or RAS https://rip.trb.org/View/1486185 Mon, 23 Oct 2017 12:39:31 GMT https://rip.trb.org/View/1486185 NCHRP Implementation Support Program. Increasing WMA Implementation by Leveraging the State-Of-The-Knowledge https://rip.trb.org/View/1457057 Thu, 23 Feb 2017 12:21:49 GMT https://rip.trb.org/View/1457057 PPRC14 SPE 4.51A: Binder Replacement in High RAP/RAS Asphalt Mixes (Phase 1: Literature Review and Laboratory Testing) https://rip.trb.org/View/1441816 Wed, 04 Jan 2017 10:53:21 GMT https://rip.trb.org/View/1441816 Short- and Long-Term Binder Aging Methods to Accurately Reflect Aging in Asphalt Mixtures https://rip.trb.org/View/1406906 Mon, 09 May 2016 10:10:38 GMT https://rip.trb.org/View/1406906