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/ Performance and Cost-Benefit Analysis of Field Applied Stains for Highway Infrastructure https://rip.trb.org/View/2643443 Tue, 23 Dec 2025 14:10:05 GMT https://rip.trb.org/View/2643443 Device to Optimize Crashworthiness of Breakaway Sign Support System to Meet AASHTO MASH https://rip.trb.org/View/2505728 Mon, 03 Feb 2025 22:23:45 GMT https://rip.trb.org/View/2505728 Application of MASH Test Criteria to Breakaway Sign and Luminaire Supports and Crashworthy Work Zone Traffic Control Devices https://rip.trb.org/View/2433905 Mon, 23 Sep 2024 17:40:19 GMT https://rip.trb.org/View/2433905 Examination of Current U.S. and EU Crash Test Evaluation Criteria for Sign and Luminaire Support Structures and Work Zone Devices https://rip.trb.org/View/2381718 Tue, 21 May 2024 16:54:27 GMT https://rip.trb.org/View/2381718 Determination of U-Bolt Connection Fatigue Load Capacities in Overhead Sign Support Structures https://rip.trb.org/View/2344946 Tue, 27 Feb 2024 17:19:35 GMT https://rip.trb.org/View/2344946 Fatigue Characterization of Galvanized Welded Connections https://rip.trb.org/View/2015225 Tue, 30 Aug 2022 17:27:47 GMT https://rip.trb.org/View/2015225 Fatigue Characterization and Improvement of Cantilevered Sign Structure Box Connections https://rip.trb.org/View/2015219 Tue, 30 Aug 2022 15:55:35 GMT https://rip.trb.org/View/2015219 SPR-2323: Highway Sign Support Systems: Condition Assessment Deterioration Models and Asset Management https://rip.trb.org/View/2003106 Thu, 04 Aug 2022 00:29:00 GMT https://rip.trb.org/View/2003106 In-Service Performance Evaluation (ISPE) of Roadway Safety Features https://rip.trb.org/View/1861146 Fri, 25 Jun 2021 07:46:24 GMT https://rip.trb.org/View/1861146 Evaluation of Vibration Mitigation Techniques for KDOT Cantilever and Butterfly Sign Structures https://rip.trb.org/View/1736399 Tue, 01 Sep 2020 13:47:09 GMT https://rip.trb.org/View/1736399 Initial Analytical Investigation of Cantilever and Butterfly Steel Overhead Sign Trusses with Respect to Remaining Fatigue Life https://rip.trb.org/View/1736392 Tue, 01 Sep 2020 13:15:44 GMT https://rip.trb.org/View/1736392 Full-Scale Wall of Wind Testing of Variable Message Signs (VMS) Structures to Develop Drag Coefficients for AASHTO Supports Specifications https://rip.trb.org/View/1474339 Thu, 13 Jul 2017 01:02:04 GMT https://rip.trb.org/View/1474339 Wind Drag Coefficients for Highway Signs and Support Structures https://rip.trb.org/View/1467312 Thu, 18 May 2017 12:23:57 GMT https://rip.trb.org/View/1467312 Smart Installation and Monitoring System for Large Anchor Bolts of Support Structure for Highway Signs, Luminaires, and Traffic Signals https://rip.trb.org/View/1442751 Sat, 14 Jan 2017 10:49:02 GMT https://rip.trb.org/View/1442751 Weathering Steel Sign Structures Condition Assessment- Phase I https://rip.trb.org/View/1326961 Sat, 11 Oct 2014 01:00:16 GMT https://rip.trb.org/View/1326961