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/ Improving Transportation Infrastructure Safety Through Flow and Scour Analysis at Porous Riverbank Protection Structures https://rip.trb.org/View/2695864 Thu, 23 Apr 2026 17:50:53 GMT https://rip.trb.org/View/2695864 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 Aligning Geometric Design with Roadway Context https://rip.trb.org/View/2600545 Thu, 18 Sep 2025 15:52:49 GMT https://rip.trb.org/View/2600545 Environmental Impact of Roundabouts https://rip.trb.org/View/2566963 Wed, 18 Jun 2025 16:13:59 GMT https://rip.trb.org/View/2566963 Development of U.S. Vehicle Capacity Models for Multilane and Turbo Roundabouts https://rip.trb.org/View/2558402 Wed, 28 May 2025 09:52:47 GMT https://rip.trb.org/View/2558402 Designing Roadside Safety Hardware for Emerging Vehicle Types https://rip.trb.org/View/2521578 Tue, 11 Mar 2025 15:07:05 GMT https://rip.trb.org/View/2521578 Develop Crash Predictive Methods for Frontage Roads Including Ramp Terminals, and Intersections with Crossroads in Texas https://rip.trb.org/View/2437688 Thu, 03 Oct 2024 10:27:15 GMT https://rip.trb.org/View/2437688 Designing for Target Speed https://rip.trb.org/View/2437305 Mon, 30 Sep 2024 17:13:25 GMT https://rip.trb.org/View/2437305 Determine Hydroplaning Potential Using Existing Pavement Asset Data https://rip.trb.org/View/2420099 Fri, 23 Aug 2024 12:14:03 GMT https://rip.trb.org/View/2420099 Comparative Analysis of Grade-Separated Pedestrian Infrastructure and At-Grade Treatments https://rip.trb.org/View/2419636 Mon, 19 Aug 2024 09:35:41 GMT https://rip.trb.org/View/2419636 Development of a KYTC Highway Geometric Design Workshop https://rip.trb.org/View/2417072 Mon, 12 Aug 2024 13:26:33 GMT https://rip.trb.org/View/2417072 Speed Impacts from Roundabouts and Other Traffic Control Devices https://rip.trb.org/View/2414011 Wed, 07 Aug 2024 09:25:08 GMT https://rip.trb.org/View/2414011 Crash Prediction Methods for Long-Term Work Zones https://rip.trb.org/View/2381735 Tue, 21 May 2024 20:29:15 GMT https://rip.trb.org/View/2381735 Strategic Research Agenda for Geometric Design of Highways and Streets https://rip.trb.org/View/2381734 Tue, 21 May 2024 20:14:08 GMT https://rip.trb.org/View/2381734 Development of Guidelines for Implementing the Flipped Left Diamond Interchange Design https://rip.trb.org/View/2283483 Mon, 30 Oct 2023 22:58:36 GMT https://rip.trb.org/View/2283483