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/ Improving Traffic Safety through Quantification of Road Network Hydroplaning Risks https://rip.trb.org/View/2625310 Thu, 13 Nov 2025 15:35:54 GMT https://rip.trb.org/View/2625310 Ultrasonic Inspection of Reconditioned Railroad Bearing Components – Year 3 https://rip.trb.org/View/2574196 Mon, 14 Jul 2025 19:01:11 GMT https://rip.trb.org/View/2574196 Managing Vehicle-Rail Interface (VRI) Dynamics and Mechanics https://rip.trb.org/View/2446878 Tue, 29 Oct 2024 15:30:15 GMT https://rip.trb.org/View/2446878 Ultrasonic Inspection of Reconditioned Railroad Bearing Components – Year 2 https://rip.trb.org/View/2405275 Mon, 22 Jul 2024 08:09:13 GMT https://rip.trb.org/View/2405275 A Frog Design Primer and Research Roadmap https://rip.trb.org/View/1893352 Tue, 23 Nov 2021 18:56:05 GMT https://rip.trb.org/View/1893352 Methods for Qualitative and Quantitative Measurement of Top of Rail Friction Modifiers (TORFM) in Revenue Service https://rip.trb.org/View/1762966 Thu, 07 Jan 2021 23:05:28 GMT https://rip.trb.org/View/1762966 Quantitative Evaluation of Effect of Top of Rail Friction Modifiers on Reducing Wheel and Rail Wear https://rip.trb.org/View/1762962 Thu, 07 Jan 2021 22:44:28 GMT https://rip.trb.org/View/1762962 Determination of Top of Rail (ToR) Lubricity, using Stationary and Moving Contacting and Non-contacting Devices https://rip.trb.org/View/1602484 Sat, 27 Apr 2019 19:20:43 GMT https://rip.trb.org/View/1602484 Correlation of Continuous Vehicle Based and Wayside Inspection Data to Develop Non-Traditional Maintenance Intervention Strategies https://rip.trb.org/View/1601564 Mon, 22 Apr 2019 23:42:10 GMT https://rip.trb.org/View/1601564 The Impact of Wide-Base Tires on Pavement Damage: A National Study https://rip.trb.org/View/1362143 Wed, 22 Jul 2015 01:02:49 GMT https://rip.trb.org/View/1362143 Pavement Surface Characterization for Optimization of Trade-off between Grip and Rolling Resistance https://rip.trb.org/View/1330248 Sat, 08 Nov 2014 01:03:52 GMT https://rip.trb.org/View/1330248 Rail Neutral Temperature In-Situ Evaluation https://rip.trb.org/View/1313120 Thu, 19 Jun 2014 01:00:50 GMT https://rip.trb.org/View/1313120 Optimizing Performance of Railroad Rail through Artificial Wear https://rip.trb.org/View/1313117 Thu, 19 Jun 2014 01:00:47 GMT https://rip.trb.org/View/1313117 Performance of Warm Asphalt and Low Energy Mixes https://rip.trb.org/View/1234497 Thu, 03 Jan 2013 15:13:26 GMT https://rip.trb.org/View/1234497 Quieter, Smoother, More Durable Pavement Surfaces https://rip.trb.org/View/1234496 5 years) required by the FHWA. Comparisons will be made with other research (e.g., Danish Road Institute, National Center for Asphalt Technology), other mixes, and improved California mix designs. Field studies include continuing to monitor noise, pavement smoothness, condition, and other properties. New sections established under the Pavement Preservation Task Group (PPTG) will be monitored for 5 year minimum per Federal Highway Administration (FHWA) requirement. Laboratory study of mix designs for better noise reduction and durability over time. Continuing to build data base and document field measurements and laboratory tests.]]> Thu, 03 Jan 2013 15:13:25 GMT https://rip.trb.org/View/1234496