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/ Nanoscale Wear Mechanics-driven Durable Tire Design https://rip.trb.org/View/2696033 Sat, 25 Apr 2026 12:25:11 GMT https://rip.trb.org/View/2696033 Effect of Supplementary Cementitious Materials (SCMs) and waste products on Critical Chloride Threshold, CT, of Concrete https://rip.trb.org/View/2694441 Tue, 21 Apr 2026 13:35:39 GMT https://rip.trb.org/View/2694441 Microplastic Air Pollution from the Wear of Vehicle Tires https://rip.trb.org/View/2582930 Tue, 05 Aug 2025 15:42:13 GMT https://rip.trb.org/View/2582930 Design Guidance and Best Practices for the Use of Light Fill https://rip.trb.org/View/2487315 Fri, 18 Jul 2025 10:36:48 GMT https://rip.trb.org/View/2487315 Innovations Deserving Exploratory Analysis--The Transit IDEA Program. IDEA 106. Sustainable Tire Tread Nanotechnology for Battery Electric Buses https://rip.trb.org/View/2572330 Tue, 08 Jul 2025 16:59:59 GMT https://rip.trb.org/View/2572330 A High-Performance, Sustainable, Ultra-High-Performance Concrete Material for Highway Bridge Applications https://rip.trb.org/View/2498992 Tue, 28 Jan 2025 13:02:40 GMT https://rip.trb.org/View/2498992 Understanding of Tire-Wear Gaseous Emissions and their Impact on Secondary Aerosol Formation from On-Road Vehicles https://rip.trb.org/View/2427675 Thu, 12 Sep 2024 15:20:20 GMT https://rip.trb.org/View/2427675 ACRP First Look: Understanding Impacts of Tire Anti-degradants 6PPD and 6PPD-Quinone at Airports https://rip.trb.org/View/2413907 Mon, 05 Aug 2024 20:03:54 GMT https://rip.trb.org/View/2413907 Performance-Based Superelevation Design Criteria https://rip.trb.org/View/2381751 Thu, 23 May 2024 10:24:25 GMT https://rip.trb.org/View/2381751 Using Rubber Powder to Improve Freeze/Thaw Resistance of Concrete https://rip.trb.org/View/2362122 Thu, 04 Apr 2024 10:52:12 GMT https://rip.trb.org/View/2362122 Stormwater Management to Address Highway Runoff Toxicity Due to 6PPD-Quinone from Tire Rubber https://rip.trb.org/View/2265694 Tue, 10 Oct 2023 15:32:54 GMT https://rip.trb.org/View/2265694 Transport and Mitigation of Tire and Road Wear Microparticles in Stormwater Runoff from Highways https://rip.trb.org/View/2263200 Fri, 06 Oct 2023 18:50:06 GMT https://rip.trb.org/View/2263200 Low-Cost Sensing System for the Detection and Classification of Wide Base Tire Types and Distribution at the Network Level https://rip.trb.org/View/1992631 Mon, 11 Jul 2022 17:41:25 GMT https://rip.trb.org/View/1992631 Environmental Friendly Applications of Ground Tire Rubber (GTR) In Producing Concrete https://rip.trb.org/View/1948638 Fri, 06 May 2022 12:26:44 GMT https://rip.trb.org/View/1948638 Optimizing the Sustainability of Asphalt Pavements through Incorporating Crumb Rubber in High-Modulus Asphalt Concrete (HMAC) Mixtures in Louisiana https://rip.trb.org/View/1948607 Fri, 06 May 2022 11:52:11 GMT https://rip.trb.org/View/1948607