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/ Developing Guidelines for Right-Turn Lane Pockets for Intersections in Nevada https://rip.trb.org/View/2713605 Thu, 11 Jun 2026 14:33:30 GMT https://rip.trb.org/View/2713605 Two-Lane to Three-Lane Roadway Conversions: Active Transportation Safety Implications https://rip.trb.org/View/2712207 Wed, 10 Jun 2026 11:36:42 GMT https://rip.trb.org/View/2712207 Crash Evaluation of Roadsides in Urban and Suburban Contexts https://rip.trb.org/View/2712180 Tue, 09 Jun 2026 15:10:56 GMT https://rip.trb.org/View/2712180 Safety Performance of Safe System Treatments for Corridors and Intersections that May Impact Capacity https://rip.trb.org/View/2712178 Tue, 09 Jun 2026 15:00:53 GMT https://rip.trb.org/View/2712178 Implementing Self-Explaining and Self-Enforcing Roads https://rip.trb.org/View/2712170 Tue, 09 Jun 2026 12:41:56 GMT https://rip.trb.org/View/2712170 Evaluation of Alternative Intersection and Interchange Options for Nebraska https://rip.trb.org/View/2689408 Tue, 02 Jun 2026 12:26:34 GMT https://rip.trb.org/View/2689408 Investigating Contributing Factors and Potential Countermeasures to Reduce Pedestrian Crashes at Intersections https://rip.trb.org/View/2705384 Thu, 21 May 2026 08:03:58 GMT https://rip.trb.org/View/2705384 Assessing the Impacts of Safety-Focused Design Interventions on Arterial Roadways https://rip.trb.org/View/2677552 Tue, 03 Mar 2026 20:07:45 GMT https://rip.trb.org/View/2677552 Designing Safer Streets https://rip.trb.org/View/2662686 Thu, 29 Jan 2026 16:30:17 GMT https://rip.trb.org/View/2662686 Impact of Passing Lane Guidance through Angled Markings on Two-Lane Rural Highways https://rip.trb.org/View/2655580 Thu, 15 Jan 2026 13:01:45 GMT https://rip.trb.org/View/2655580 Optimize Tradeoffs between Centerline Buffers, Lane Width, and Shoulders for Rural Undivided Highways https://rip.trb.org/View/2652072 Fri, 09 Jan 2026 16:29:38 GMT https://rip.trb.org/View/2652072 Synthesis of Information Related to Highway Practices. Topic 57-06. Integrating Safety into Development Reviews and Transportation Impact Practices https://rip.trb.org/View/2630481 Wed, 26 Nov 2025 18:20:05 GMT https://rip.trb.org/View/2630481 Synthesis of Information Related to Highway Practices. Topic 57-01. Performance-Based Design Practices https://rip.trb.org/View/2630482 Wed, 26 Nov 2025 18:14:11 GMT https://rip.trb.org/View/2630482 Synthesis of Information Related to Highway Practices. Topic 57-19. Design Practices to Achieve Desired Travel Speeds https://rip.trb.org/View/2630498 Tue, 25 Nov 2025 15:53:06 GMT https://rip.trb.org/View/2630498 Developing Guidance for Calculating the Downstream Functional Area of an Intersection https://rip.trb.org/View/2628203 Thu, 20 Nov 2025 08:48:03 GMT https://rip.trb.org/View/2628203