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/ Assessing Traffic Flow and Motorcyclist Safety Outcomes Associated with Lane Filtering https://rip.trb.org/View/2720302 Thu, 02 Jul 2026 19:30:01 GMT https://rip.trb.org/View/2720302 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 Evaluating the Effectiveness of Drivers' Education Modules on Safety https://rip.trb.org/View/2714400 Mon, 15 Jun 2026 15:59:07 GMT https://rip.trb.org/View/2714400 Low-Frequency High-Impact Travel for Data Analysis https://rip.trb.org/View/2709248 Tue, 02 Jun 2026 13:56:50 GMT https://rip.trb.org/View/2709248 Agentic LLM-powered Synthetic Transportation Agent Response System (AL-STARS) https://rip.trb.org/View/2703689 Fri, 15 May 2026 09:28:30 GMT https://rip.trb.org/View/2703689 How do perceptions of transportation challenges influence travel behavior for people with disabilities? https://rip.trb.org/View/2702517 Thu, 14 May 2026 16:54:31 GMT https://rip.trb.org/View/2702517 Exploring the Relationships Among Perceived Safety, Perceived Accessibility, and Travel Behavior https://rip.trb.org/View/2702636 Thu, 14 May 2026 16:47:22 GMT https://rip.trb.org/View/2702636 Evaluating Behavioral Responses to Mobility Credits and Ridehailing Integration in a Digital Mobility System https://rip.trb.org/View/2702725 Thu, 14 May 2026 16:36:40 GMT https://rip.trb.org/View/2702725 Assessment of Litter Hot Spot Areas for Targeted Reduction in Prince George's County https://rip.trb.org/View/2701237 Wed, 13 May 2026 09:15:15 GMT https://rip.trb.org/View/2701237 Investigating Driver Behavior Under Cyberattacks in Connected Vehicle Environments: Phase II https://rip.trb.org/View/2696964 Wed, 29 Apr 2026 16:34:42 GMT https://rip.trb.org/View/2696964 Optimization-Based Framework and Decision-Support Tool for Bridge Toll Implementation Under Behavioral and Operational Constraints https://rip.trb.org/View/2696158 Mon, 27 Apr 2026 19:59:05 GMT https://rip.trb.org/View/2696158 Nanoscale Wear Mechanics-driven Durable Tire Design https://rip.trb.org/View/2696033 Sat, 25 Apr 2026 12:25:11 GMT https://rip.trb.org/View/2696033 Disability, Mode Perceptions, and Travel Behavior https://rip.trb.org/View/2695812 Thu, 23 Apr 2026 17:58:32 GMT https://rip.trb.org/View/2695812 New Travel Insights from Cell Phone GPS Data https://rip.trb.org/View/2691672 Sun, 12 Apr 2026 23:48:02 GMT https://rip.trb.org/View/2691672 Sensor-informed Generative Digital Twin: High-fidelity Simulation for Sustainable Transportation and Policy Validation https://rip.trb.org/View/2691669 Sun, 12 Apr 2026 23:41:20 GMT https://rip.trb.org/View/2691669