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/ Enhancing Flexible Pavement System 23 (FPS23) by Incorporating a Top-Down Cracking Model in Texas Mechanistic-Empirical Flexible Pavement Design System (TxME) https://rip.trb.org/View/2604524 Mon, 29 Sep 2025 16:12:23 GMT https://rip.trb.org/View/2604524 Linking Balanced Mix Design to Pavement Mechanistic-Empirical Design https://rip.trb.org/View/2558414 Tue, 27 May 2025 20:33:36 GMT https://rip.trb.org/View/2558414 Investigation of Flexible Bridge Deck Overlays in Kansas https://rip.trb.org/View/2489962 Mon, 13 Jan 2025 14:43:23 GMT https://rip.trb.org/View/2489962 Investigation of Hot Mix Asphalt Aging Effect on Mechanical Properties of Mixes Based on Their Binder Performance Results – Phase II https://rip.trb.org/View/2480360 Wed, 01 Jan 2025 17:04:48 GMT https://rip.trb.org/View/2480360 Revisions for the TxDOT Pavement Management Information System (PMIS) Rater’s Manual https://rip.trb.org/View/2437686 Thu, 03 Oct 2024 10:16:09 GMT https://rip.trb.org/View/2437686 Enhancing Texas Mechanistic-Empirical Flexible Pavement Design System (TxME) Practice: Develop Enhanced Mix Aging Model and District-Level Calibration Guidance https://rip.trb.org/View/2437684 Thu, 03 Oct 2024 10:09:55 GMT https://rip.trb.org/View/2437684 Illinois Flexible Pavement Design and Monitoring https://rip.trb.org/View/2399774 Mon, 01 Jul 2024 12:28:17 GMT https://rip.trb.org/View/2399774 Developing A Fair Specification for Paver Mounted Thermal Profiling https://rip.trb.org/View/2350814 Wed, 13 Mar 2024 13:11:22 GMT https://rip.trb.org/View/2350814 Next-Generation Permeable Pavement for Enhanced Durability and Functionality https://rip.trb.org/View/2291281 Wed, 15 Nov 2023 17:12:35 GMT https://rip.trb.org/View/2291281 Impact of Climate Change on Road Maintenance Budgets and Practices https://rip.trb.org/View/2260028 Wed, 04 Oct 2023 13:02:36 GMT https://rip.trb.org/View/2260028 Develop Enhanced Cold Recycling Methods and Specifications https://rip.trb.org/View/2255990 Wed, 27 Sep 2023 15:21:09 GMT https://rip.trb.org/View/2255990 Develop Best Practices for Flexible Pavement Repairs https://rip.trb.org/View/2255821 Wed, 27 Sep 2023 14:06:01 GMT https://rip.trb.org/View/2255821 SPR-4820: Enhanced Methods to Evaluate Flexible Pavement Moisture Damage and Interface Bonding Conditions Using the 3D Ground Penetrating Radar and Falling Weight Deflectometer https://rip.trb.org/View/2251472 Thu, 21 Sep 2023 16:35:01 GMT https://rip.trb.org/View/2251472 Comprehensive Review of Flexible Pavement Design Approaches https://rip.trb.org/View/1895368 Fri, 03 Dec 2021 13:11:10 GMT https://rip.trb.org/View/1895368 Update State Study No. 170 Deliverables with New PCC Test Data Revised final report for SS No. 170, “AASHTO 2002 Pavement Design Guide-Phase II” – Volume 1 https://rip.trb.org/View/1883838 Fri, 08 Oct 2021 09:12:41 GMT https://rip.trb.org/View/1883838