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/ Evaluating the Influence of Vehicle Active Safety Technologies on Roadway Departures https://rip.trb.org/View/2558379 Thu, 29 May 2025 12:38:47 GMT https://rip.trb.org/View/2558379 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 Investigation and Validation of V-Ditch Traversability Related to Crash Testing Cable Barrier Systems https://rip.trb.org/View/2381739 Wed, 22 May 2024 11:49:24 GMT https://rip.trb.org/View/2381739 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 Development of Critical Impact Point and Impact Angle Guidance for the Manual for Assessing Safety Hardware (MASH) https://rip.trb.org/View/2381727 Tue, 21 May 2024 16:42:58 GMT https://rip.trb.org/View/2381727 Advancement of Gender Equity in Transportation Safety, Design, Development, and Evaluation of Roadside Safety Hardware https://rip.trb.org/View/2342039 Mon, 19 Feb 2024 18:31:40 GMT https://rip.trb.org/View/2342039 Development and Evaluation of Box-Beam Barrier Configuration for Shielding Fixed Objects and Bridge Ends in Medians https://rip.trb.org/View/2170143 Fri, 12 May 2023 13:48:11 GMT https://rip.trb.org/View/2170143 Investigation and Development of a MASH Test Level 6, Cost-Effective Barrier System for Containing Heavy Tractor Tank-Trailer Vehicles and Mitigating Catastrophic Crash Events – Phase V https://rip.trb.org/View/1942824 Wed, 27 Apr 2022 14:57:11 GMT https://rip.trb.org/View/1942824 Investigating and Developing a MASH Compliant Contraflow Ramp Closure Gate https://rip.trb.org/View/1873849 Mon, 23 Aug 2021 15:31:26 GMT https://rip.trb.org/View/1873849 MASH Crashworthiness of Luminaire Poles https://rip.trb.org/View/1854202 Thu, 27 May 2021 19:16:00 GMT https://rip.trb.org/View/1854202 Testing of Cable Median Barrier in a Narrow Ditch https://rip.trb.org/View/1847748 Tue, 20 Apr 2021 10:18:49 GMT https://rip.trb.org/View/1847748 Evaluation of MASH Test Vehicles https://rip.trb.org/View/1842749 Wed, 24 Mar 2021 10:31:15 GMT https://rip.trb.org/View/1842749 Crashworthy Foundations for Soil-Embedded Roadside Safety Hardware https://rip.trb.org/View/1740337 Fri, 26 Feb 2021 10:53:51 GMT https://rip.trb.org/View/1740337 Impact of Soil Stiffness on the Performance of Crash Testing and Roadside Safety https://rip.trb.org/View/1707181 Thu, 21 May 2020 10:29:07 GMT https://rip.trb.org/View/1707181