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/ Traffic Control Device Analysis, Testing, and Evaluation Program https://rip.trb.org/View/2731978 Fri, 17 Jul 2026 16:11:43 GMT https://rip.trb.org/View/2731978 Evaluate Traffic Control Devices Viable Use to Reduce Speeding Behavior at High-Low Speed Zone Locations in Michigan https://rip.trb.org/View/2731925 Fri, 17 Jul 2026 14:50:37 GMT https://rip.trb.org/View/2731925 Evaluation of Transit Signal Display Options https://rip.trb.org/View/2716608 Thu, 18 Jun 2026 10:03:43 GMT https://rip.trb.org/View/2716608 Scoping Study: Vertical Visibility Constraints -- Vertical Curvature Traffic Control Devices https://rip.trb.org/View/2709249 Tue, 02 Jun 2026 13:49:43 GMT https://rip.trb.org/View/2709249 Colorado Traffic and Animal Detection (COTAD) Model - Training the YOLO algorithm to Reliably Detect Colorado Wildlife, Pedestrians, and Vehicles https://rip.trb.org/View/2643439 Tue, 23 Dec 2025 13:50:23 GMT https://rip.trb.org/View/2643439 Study to Understand the Influence of Emergency Vehicle Color, Reflectance, Signing/Arrow Boards, and Lighting Configurations in Reducing Responder-Involved Crashes https://rip.trb.org/View/2642797 Wed, 17 Dec 2025 15:58:45 GMT https://rip.trb.org/View/2642797 Develop and Evaluate Long Median Barrier Gate to Assist with Emergency Response https://rip.trb.org/View/2636104 Mon, 08 Dec 2025 09:44:38 GMT https://rip.trb.org/View/2636104 Use of Colors in Dynamic Message Signs for Both Travel Times and Static Sign Simulation https://rip.trb.org/View/2487332 Wed, 08 Oct 2025 11:53:07 GMT https://rip.trb.org/View/2487332 Evaluation of Signs at Highway-Rail Crossings https://rip.trb.org/View/2601423 Wed, 17 Sep 2025 16:18:51 GMT https://rip.trb.org/View/2601423 Placement Options for In-street Pedestrian Crossing Signs (R1-6a) https://rip.trb.org/View/2593953 Thu, 28 Aug 2025 12:29:56 GMT https://rip.trb.org/View/2593953 Research and Assessment of Needs for Sign Maintenance https://rip.trb.org/View/2593930 Thu, 28 Aug 2025 11:32:30 GMT https://rip.trb.org/View/2593930 Evaluating the Effectiveness of Dynamic Speed Feedback Sign (DSFS) at Safety Critical Locations in Connecticut https://rip.trb.org/View/2566902 Wed, 18 Jun 2025 13:29:07 GMT https://rip.trb.org/View/2566902 Graphical Changeable Message Signs: Strategies, Impacts, and Best Practices https://rip.trb.org/View/2563027 Tue, 10 Jun 2025 09:49:11 GMT https://rip.trb.org/View/2563027 Evaluation of Digital Speed Limit Signs in Work Zones https://rip.trb.org/View/2562260 Fri, 06 Jun 2025 14:32:42 GMT https://rip.trb.org/View/2562260 Size of Regulatory and Warning Signs https://rip.trb.org/View/2558385 Wed, 28 May 2025 14:05:40 GMT https://rip.trb.org/View/2558385