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 Best Practices for Structuring and Managing Statewide Resource-Tracking Databases https://rip.trb.org/View/2780222 Fri, 18 Sep 2026 13:15:33 GMT https://rip.trb.org/View/2780222 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 ACRP Insight Event: General Aviation Financial Sustainability https://rip.trb.org/View/2772549 Wed, 02 Sep 2026 16:48:14 GMT https://rip.trb.org/View/2772549 Best Practices for Airport Administrative Cost Allocation https://rip.trb.org/View/2772551 Wed, 02 Sep 2026 16:40:02 GMT https://rip.trb.org/View/2772551 Synthesis of Information Related to Transit Practices. Topic SG-22. Inter-Jurisdictional Approaches to Cost Sharing for Regional Transit Services https://rip.trb.org/View/2772555 Tue, 01 Sep 2026 17:10:44 GMT https://rip.trb.org/View/2772555 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 Evaluation of Asphalt Rejuvenators on Asphalt Mixtures with High RAP https://rip.trb.org/View/2768413 Wed, 26 Aug 2026 17:04:22 GMT https://rip.trb.org/View/2768413 Improving Transparency and Accountability in Consultant Fee Proposals https://rip.trb.org/View/2768412 Wed, 26 Aug 2026 17:04:22 GMT https://rip.trb.org/View/2768412 Communicating the Benefits of a Maintenance Budget Overhaul to Legislators: The Shock Factor of Inaction https://rip.trb.org/View/2768406 Wed, 26 Aug 2026 17:04:19 GMT https://rip.trb.org/View/2768406 Impact of Flooding on Pavement Drawdown Structures https://rip.trb.org/View/2767321 Mon, 24 Aug 2026 13:11:53 GMT https://rip.trb.org/View/2767321 Beyond Ridership: Measuring the Performance of Twin Cities Public Transit Systems https://rip.trb.org/View/2761612 Mon, 17 Aug 2026 10:53:27 GMT https://rip.trb.org/View/2761612 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 Strategies for Addressing Funding Challenges in Transportation Asset Management https://rip.trb.org/View/2712184 Tue, 09 Jun 2026 16:04:26 GMT https://rip.trb.org/View/2712184 Innovative Approaches to Maintenance Funding for Active Transportation Infrastructure on State Highways Research https://rip.trb.org/View/2712169 Tue, 09 Jun 2026 12:38:59 GMT https://rip.trb.org/View/2712169