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/ Notification Systems to Enhance Construction Vehicle Safety at Work Zone Access Points https://rip.trb.org/View/2712172 Tue, 09 Jun 2026 12:49:55 GMT https://rip.trb.org/View/2712172 Streamlining the Registration Process for Motor Carriers https://rip.trb.org/View/2593941 Thu, 28 Aug 2025 11:32:35 GMT https://rip.trb.org/View/2593941 Examination of Light-Based Directed Vehicle to Everything Communications Systems for Bridge Strike Detection https://rip.trb.org/View/2562268 Fri, 06 Jun 2025 14:57:35 GMT https://rip.trb.org/View/2562268 Tailoring Alternative Project Delivery Methods to Deploy an Effective Hydrogen Fueling Infrastructure for Commercial Vehicles in Georgia https://rip.trb.org/View/2508956 Wed, 12 Feb 2025 10:01:03 GMT https://rip.trb.org/View/2508956 Improving Commercial Vehicle Safety through University Partnerships with a Focus on Technologies and Tools to Promote Safe Driving Behaviors and to Identify High-Risk Corridors https://rip.trb.org/View/2270061 Wed, 18 Oct 2023 11:28:38 GMT https://rip.trb.org/View/2270061 Assessing the Consumption Costs of Motor Vehicles on Arizona Roads and Bridges https://rip.trb.org/View/2248971 Fri, 15 Sep 2023 17:33:37 GMT https://rip.trb.org/View/2248971 Military Under 21 CMV Driver Pilot Program (FAST Act Section 5404, Phase III) https://rip.trb.org/View/2093177 Tue, 03 Jan 2023 13:53:37 GMT https://rip.trb.org/View/2093177 Investigating the Safety of Commercial Motor Vehicle Operation by Deaf and Hard of Hearing Drivers https://rip.trb.org/View/2077931 Tue, 06 Dec 2022 09:48:30 GMT https://rip.trb.org/View/2077931 ACE Program: Testing and Demonstration Activities https://rip.trb.org/View/2062465 Tue, 15 Nov 2022 16:18:03 GMT https://rip.trb.org/View/2062465 ACE Program: Volpe Testing and Evaluation Support https://rip.trb.org/View/2062463 Tue, 15 Nov 2022 16:18:02 GMT https://rip.trb.org/View/2062463 Investigation of Commercial Motor Vehicle (CMV)-Related Crashes in Ohio Work Zones https://rip.trb.org/View/2052123 Fri, 28 Oct 2022 09:14:23 GMT https://rip.trb.org/View/2052123 Improving Commercial Vehicle Safety through University Partnerships with a Focus on Distracted Driving and Work Zone Safety https://rip.trb.org/View/1987582 Fri, 01 Jul 2022 13:05:51 GMT https://rip.trb.org/View/1987582 Using Advanced Technologies to Reduce Commercial Motor Vehicle Crashes in Work Zones https://rip.trb.org/View/1953260 Wed, 18 May 2022 11:04:50 GMT https://rip.trb.org/View/1953260 NJDOT Commercial Vehicle Size and Weight Guidebook Update https://rip.trb.org/View/1897042 Thu, 16 Dec 2021 15:45:55 GMT https://rip.trb.org/View/1897042 Transportation Research Related to COVID-19. Regulatory Relief of Commercial Vehicle Weight Requirements for Emergency Transportation of Critical Commodities https://rip.trb.org/View/1842759 Wed, 24 Mar 2021 18:41:22 GMT https://rip.trb.org/View/1842759