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/ Systemic Safety Analysis and Assessment of Bicycle and Pedestrian Crash Risk: Developing Risk Factors using the Multimodal Inventory Project Data https://rip.trb.org/View/2725665 Wed, 08 Jul 2026 16:52:17 GMT https://rip.trb.org/View/2725665 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 Guidance for Selecting Pedestrian Safety Treatments at Signalized Intersections to Address Permitted Turn Conflicts https://rip.trb.org/View/2712202 Wed, 10 Jun 2026 11:11:14 GMT https://rip.trb.org/View/2712202 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 Improving Crash Data for Active Transportation Users https://rip.trb.org/View/2701260 Tue, 12 May 2026 15:48:07 GMT https://rip.trb.org/View/2701260 Developing Data-Based Recommendations for Pedestrian Hybrid Beacons (PHBs) and Midblock Pedestrian Signals (MPSs) Deployment in Nevada https://rip.trb.org/View/2677562 Wed, 04 Mar 2026 14:48:35 GMT https://rip.trb.org/View/2677562 Real-time Fleet Composition via Machine Vision and AI for use in Pedestrian Safety and Risk Exposure Studies https://rip.trb.org/View/2669652 Sun, 15 Feb 2026 16:27:33 GMT https://rip.trb.org/View/2669652 Toward Smarter Mobility: AI-Powered Safety Insights for AVs and Vulnerable Road Users https://rip.trb.org/View/2669549 Thu, 12 Feb 2026 15:28:23 GMT https://rip.trb.org/View/2669549 Immersive AR/VR learning to enhance pedestrian safety https://rip.trb.org/View/2663606 Tue, 03 Feb 2026 15:36:36 GMT https://rip.trb.org/View/2663606 Using Large Language Models to Generate Synthetic Data for Proactive Pedestrian Safety Prediction: Overcoming Data Collection Barriers in Surrogate Safety Analysis https://rip.trb.org/View/2663604 Tue, 03 Feb 2026 15:34:23 GMT https://rip.trb.org/View/2663604 Designing Safer Streets https://rip.trb.org/View/2662686 Thu, 29 Jan 2026 16:30:17 GMT https://rip.trb.org/View/2662686 Spatio Temporal Graph Learning for Real Time Pedestrian Exposure Estimation https://rip.trb.org/View/2640189 Thu, 11 Dec 2025 13:45:37 GMT https://rip.trb.org/View/2640189 Are Automonous Vehicles Safer Drivers than Humans? Comparing performance in San Francisco https://rip.trb.org/View/2625584 Tue, 18 Nov 2025 15:14:24 GMT https://rip.trb.org/View/2625584 Hotspot Stability of Freight Vehicle Crashes Involving Vulnerable Road Users: A Spatio-Temporal Perspective https://rip.trb.org/View/2625586 Tue, 18 Nov 2025 14:19:08 GMT https://rip.trb.org/View/2625586 Evaluating Safety Impacts of Permissive Green Signal Phasing on Observed Conflicts Between Left-Turning Vehicles and Pedestrians https://rip.trb.org/View/2625837 Mon, 17 Nov 2025 18:34:21 GMT https://rip.trb.org/View/2625837