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/ Are Current Rigid Pavement Roundabout Designs Working in Minnesota? https://rip.trb.org/View/2487311 Wed, 08 Oct 2025 11:57:15 GMT https://rip.trb.org/View/2487311 Requirements of Aggregate Materials as Subbase, Base, Surface, and Shoulder Courses https://rip.trb.org/View/2593918 Thu, 28 Aug 2025 09:46:23 GMT https://rip.trb.org/View/2593918 Pavement Conditions Assessment and Prediction (PCAP): A geospatial machine learning approach to inform decision-making https://rip.trb.org/View/2570737 Wed, 02 Jul 2025 11:39:48 GMT https://rip.trb.org/View/2570737 Field Performance of Pavements Made with High-Modified Hot Mix Asphalt Mixtures https://rip.trb.org/View/2468830 Mon, 02 Dec 2024 19:25:50 GMT https://rip.trb.org/View/2468830 Impact of State Highway Pavement Traffic Overloading Following Natural Disasters https://rip.trb.org/View/2431181 Mon, 16 Sep 2024 09:57:18 GMT https://rip.trb.org/View/2431181 Amount of Bituminous Surface Lost Each Year https://rip.trb.org/View/2422996 Fri, 30 Aug 2024 10:15:48 GMT https://rip.trb.org/View/2422996 Estimation of the Load Rating of Existing Highway Bridges Based on Bridge Weigh-in-Motion Data https://rip.trb.org/View/2417475 Fri, 16 Aug 2024 10:19:41 GMT https://rip.trb.org/View/2417475 Quality Assurance Procedures for Traffic Speed Deflection Devices https://rip.trb.org/View/2381723 Tue, 21 May 2024 17:12:42 GMT https://rip.trb.org/View/2381723 Pavement Electromagnetic Energy Harvesting System from Highway-Speed Vehicles https://rip.trb.org/View/2379784 Thu, 16 May 2024 09:44:12 GMT https://rip.trb.org/View/2379784 Assessing Condition of Rehabilitated Concrete Pavement with Slab Fracturing and Asphalt Overlay Using Distributed Fiber Optic Sensors https://rip.trb.org/View/2373771 Mon, 29 Apr 2024 10:55:36 GMT https://rip.trb.org/View/2373771 Accelerated Performance Testing on the 2024 NCAT Pavement Test Track with MnROAD Research Partnership https://rip.trb.org/View/2368005 Tue, 16 Apr 2024 19:25:17 GMT https://rip.trb.org/View/2368005 Investigation of Heavier-than-Expected Vehicle Weights Observed in the Vicinity of the Savannah Port Area and their Impact on Georgia’s Pavements and Bridges and Rate of Statewide Asset Degradation  https://rip.trb.org/View/2265649 Tue, 10 Oct 2023 12:24:39 GMT https://rip.trb.org/View/2265649 Long-Term Pavement Structural & Functional Evaluation on State Route 76 https://rip.trb.org/View/2264428 Mon, 09 Oct 2023 09:22:26 GMT https://rip.trb.org/View/2264428 Evaluation of the Effects of Superstructure Characteristics on the Performance of Bridge Decks under Traffic Loads https://rip.trb.org/View/2085672 Mon, 25 Sep 2023 18:04:47 GMT https://rip.trb.org/View/2085672 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