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/ Evaluate PVC Water Main Materials in Roadway Projects https://rip.trb.org/View/2731924 Fri, 17 Jul 2026 14:29:12 GMT https://rip.trb.org/View/2731924 Quantitative Evaluation of Select Materials in Subgrade Alternatives https://rip.trb.org/View/2671990 Wed, 18 Feb 2026 11:37:12 GMT https://rip.trb.org/View/2671990 Vertical and Overhead Concrete Patches https://rip.trb.org/View/2671984 Wed, 18 Feb 2026 11:21:37 GMT https://rip.trb.org/View/2671984 Develop and Demonstrate an Evaluation Process for Acceptance of Additives for Use in Forensic Analysis in Hot Mix Asphalt https://rip.trb.org/View/2666836 Tue, 10 Feb 2026 14:43:18 GMT https://rip.trb.org/View/2666836 Novel concretes made using supplementary cementitious materials and seawater (UM) https://rip.trb.org/View/2663226 Sat, 31 Jan 2026 11:06:52 GMT https://rip.trb.org/View/2663226 Durability and Cost-Benefit Assessment of Innovative Materials for Bridge Deck Maintenance and Construction https://rip.trb.org/View/2543852 Mon, 28 Apr 2025 09:09:57 GMT https://rip.trb.org/View/2543852 Transportation Materials Resource Center https://rip.trb.org/View/2441831 Wed, 16 Oct 2024 15:31:54 GMT https://rip.trb.org/View/2441831 SPR-4860: Environmental Product Declaration (EPD) Benchmark Project for Indiana Asphalt and Concrete Pavements https://rip.trb.org/View/2270076 Wed, 18 Oct 2023 14:55:30 GMT https://rip.trb.org/View/2270076 Pavement Preservation in Urban Environments: Best Practices in Materials, Technologies, and Applications https://rip.trb.org/View/2077934 Tue, 06 Dec 2022 09:48:32 GMT https://rip.trb.org/View/2077934 Integration of Repair and Remediation Methods into Pipe Material Selection Approach https://rip.trb.org/View/1868818 Mon, 26 Jul 2021 15:28:27 GMT https://rip.trb.org/View/1868818 Documenting the Impact of Aggregate Quality on Hot Mix Asphalt (HMA) Performance https://rip.trb.org/View/1486043 Fri, 20 Oct 2017 11:45:39 GMT https://rip.trb.org/View/1486043 Texas Mill Test Information for Load Ratings https://rip.trb.org/View/1455980 Fri, 17 Feb 2017 15:26:58 GMT https://rip.trb.org/View/1455980 Research for AASHTO Standing Committee on Highways. Task 374. Guidelines for Selecting Sign Sheeting Materials for AASHTO M268 https://rip.trb.org/View/1350544 Thu, 16 Apr 2015 01:00:54 GMT https://rip.trb.org/View/1350544