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/ Seasonal Weight Restriction Decision Making Based on Understanding and Monitoring of Frost Susceptibility of Pavement Structures https://rip.trb.org/View/2671988 Wed, 18 Feb 2026 11:28:12 GMT https://rip.trb.org/View/2671988 Synthesis of Information Related to Highway Practices. Topic 57-20. Practices Related to Offroad Vehicles Sharing the Road, Path, and Trail https://rip.trb.org/View/2630494 Thu, 27 Nov 2025 03:51:57 GMT https://rip.trb.org/View/2630494 The Changing Landscape of Environmental Reviews under NEPA for Airports https://rip.trb.org/View/2625811 Thu, 20 Nov 2025 15:14:27 GMT https://rip.trb.org/View/2625811 Compliance of Alternate Transit Options with State and Federal Requirements https://rip.trb.org/View/2487297 Tue, 07 Jan 2025 18:56:38 GMT https://rip.trb.org/View/2487297 Evaluation of Spring Load Restriction Removal Protocols https://rip.trb.org/View/2342047 Mon, 19 Feb 2024 19:16:14 GMT https://rip.trb.org/View/2342047 Best Practices for Structuring and Managing Statewide Resource-Tracking Databases https://rip.trb.org/View/2310562 Mon, 18 Dec 2023 17:24:53 GMT https://rip.trb.org/View/2310562 Methods to Identify Problematic Carriers and Prevent Infrastructure Damage https://rip.trb.org/View/2150891 Wed, 12 Apr 2023 10:09:29 GMT https://rip.trb.org/View/2150891 Legal Aspects of Airport Programs. Topic 15-02. Legal Issues Concerning the Safety and Security of General Aviation Airports https://rip.trb.org/View/2149960 Mon, 10 Apr 2023 17:04:28 GMT https://rip.trb.org/View/2149960 Alternative Glazing Performance Tests to Support FMVSS 205 and GTR Evaluations (VRTC) https://rip.trb.org/View/2050292 Tue, 25 Oct 2022 10:24:45 GMT https://rip.trb.org/View/2050292 Impact of New Corporate Environmental Standards Impact Airports https://rip.trb.org/View/2007987 Tue, 16 Aug 2022 14:47:17 GMT https://rip.trb.org/View/2007987 RES2023-21: Investigation Into Towing Regulation in Tennessee https://rip.trb.org/View/2007202 Fri, 12 Aug 2022 15:34:21 GMT https://rip.trb.org/View/2007202 Architecture for an Information System for Reporting and Sharing Truck Regulatory Requirements Data https://rip.trb.org/View/1915998 Thu, 17 Feb 2022 11:03:11 GMT https://rip.trb.org/View/1915998 A Guidebook for Local Truck Parking Regulations https://rip.trb.org/View/1909927 Tue, 08 Feb 2022 11:14:48 GMT https://rip.trb.org/View/1909927 Update ACRP Report 43: Improving Environmental Performance at Small Airports https://rip.trb.org/View/1900309 Tue, 28 Dec 2021 17:01:14 GMT https://rip.trb.org/View/1900309 Legal Problems Arising out of Highway Programs. Topic 26-02. Analysis of Arbitration and Holdings in Construction Disputes https://rip.trb.org/View/1889476 Tue, 02 Nov 2021 15:06:44 GMT https://rip.trb.org/View/1889476