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/ Fare-Free Futures: The Diffusion of Youth Fare-Free Transit Programs in the U.S. https://rip.trb.org/View/2784731 Thu, 01 Oct 2026 13:28:00 GMT https://rip.trb.org/View/2784731 State of Project review Nationwide DOT use of GIS for Environmental Planning and Compliance. AZTI FY2026-C1-PS1 https://rip.trb.org/View/2780405 Fri, 18 Sep 2026 16:58:16 GMT https://rip.trb.org/View/2780405 Artificial Intelligence Policies at State Departments of Transportation: The State of the Practice https://rip.trb.org/View/2780402 Fri, 18 Sep 2026 16:47:50 GMT https://rip.trb.org/View/2780402 How and to what extent do Vision Zero plans address safety for different road user groups? https://rip.trb.org/View/2778264 Thu, 17 Sep 2026 17:14:34 GMT https://rip.trb.org/View/2778264 Enhancing Transportation Policy and Planning for Safety https://rip.trb.org/View/2778221 Thu, 17 Sep 2026 14:00:59 GMT https://rip.trb.org/View/2778221 Local Tax on Dyed Fuels: Possible Revenue and Implementation Strategies https://rip.trb.org/View/2689755 Thu, 10 Sep 2026 09:18:44 GMT https://rip.trb.org/View/2689755 Designing Flexible Vehicle Efficiency Regulations for Light-Duty Vehicles https://rip.trb.org/View/2775563 Wed, 09 Sep 2026 15:23:32 GMT https://rip.trb.org/View/2775563 Integrating Microsimulation in a Multi-scale Local Freight Activity Model https://rip.trb.org/View/2775057 Fri, 04 Sep 2026 15:04:06 GMT https://rip.trb.org/View/2775057 Peak Pricing for Runway and Gate Capacity Management https://rip.trb.org/View/2772556 Tue, 01 Sep 2026 11:59:04 GMT https://rip.trb.org/View/2772556 Assessment of Establishing an NDOT Aeronautics Division and Identification of Sustainable Funding Mechanisms https://rip.trb.org/View/2739295 Thu, 30 Jul 2026 12:30:56 GMT https://rip.trb.org/View/2739295 Automated Vehicle (AV) Pooled Fund Study (PFS) Phase 2 https://rip.trb.org/View/2734822 Thu, 23 Jul 2026 14:52:23 GMT https://rip.trb.org/View/2734822 A Comprehensive Analysis of EV Charging Demand Prediction, Infrastructure Planning, and Power Network Resilience in the Era of Electric Mobility https://rip.trb.org/View/2732354 Tue, 21 Jul 2026 16:23:22 GMT https://rip.trb.org/View/2732354 Cannabis Use and Fitness-for-Duty Standards for Aviation Personnel https://rip.trb.org/View/2724767 Tue, 07 Jul 2026 09:41:54 GMT https://rip.trb.org/View/2724767 SPR 781 Optimizing SCDOT’s Permitting, Mitigation, and Compliance Systems to Improve Project Delivery https://rip.trb.org/View/2719301 Thu, 25 Jun 2026 08:53:55 GMT https://rip.trb.org/View/2719301 Cybersecurity Analysis to Support Secure Transportation Cyber-Physical Systems https://rip.trb.org/View/2696948 Wed, 29 Apr 2026 16:33:03 GMT https://rip.trb.org/View/2696948