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/ Clearview: Revisiting the Safety Benefits of this Long-Used Sign Font https://rip.trb.org/View/2778040 Mon, 14 Sep 2026 16:19:27 GMT https://rip.trb.org/View/2778040 Psychological Research on Information, Signage, and Maneuvers in Drivers (PRISM) https://rip.trb.org/View/2775970 Thu, 10 Sep 2026 13:33:55 GMT https://rip.trb.org/View/2775970 Performance Evaluation of Valmont Dampers for Traffic Signal and Sign Structures https://rip.trb.org/View/2772643 Wed, 02 Sep 2026 13:31:08 GMT https://rip.trb.org/View/2772643 Effectiveness of School Zone Speed Limits as a Traffic Calming Strategy https://rip.trb.org/View/2762674 Wed, 19 Aug 2026 16:30:17 GMT https://rip.trb.org/View/2762674 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 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 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 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 Optimized Pre-Tensioning and Re-Tightening Approaches for Anchor Rods for Highway Signs, Luminaires, and Traffic Signals (SLTS) https://rip.trb.org/View/2528609 Tue, 01 Apr 2025 16:33:45 GMT https://rip.trb.org/View/2528609