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/ Impact Study on Increasing Truck Permit Weight Limits: Infrastructure & Economic Considerations https://rip.trb.org/View/2724819 Wed, 08 Jul 2026 13:35:02 GMT https://rip.trb.org/View/2724819 Customizing Transportation Services and Technologies Based on Rural Patient Healthcare Needs https://rip.trb.org/View/2667211 Mon, 23 Feb 2026 14:19:44 GMT https://rip.trb.org/View/2667211 Including Latent benefits in CDOT Bustang ROI Calculation https://rip.trb.org/View/2643442 Tue, 23 Dec 2025 14:05:35 GMT https://rip.trb.org/View/2643442 Freeway Corridor Economic Impact https://rip.trb.org/View/2606590 Fri, 03 Oct 2025 15:21:21 GMT https://rip.trb.org/View/2606590 Evaluating isolated areas, alternative routing, and economic impact for resilient transportation in North Carolina https://rip.trb.org/View/2604572 Tue, 30 Sep 2025 11:13:25 GMT https://rip.trb.org/View/2604572 IL-Pave: Development of an Integrated Tool to Optimize Pavement Energy and Cost https://rip.trb.org/View/2589089 Thu, 28 Aug 2025 09:48:01 GMT https://rip.trb.org/View/2589089 Guide to Analyzing Economic Impact of Changes in Air Service Connectivity https://rip.trb.org/View/2588337 Tue, 12 Aug 2025 09:53:38 GMT https://rip.trb.org/View/2588337 Express Lanes Benefitting Freight Mobility: Can Express Lane Systems and its Benefits to General-purpose Lanes Improve Freight Mobility? https://rip.trb.org/View/2553996 Fri, 16 May 2025 07:20:18 GMT https://rip.trb.org/View/2553996 Supply Chain Outreach and Rail Economic Impact Study https://rip.trb.org/View/2505753 Tue, 04 Feb 2025 16:40:34 GMT https://rip.trb.org/View/2505753 Inland Ports: Case Study 2 – Economic Characteristics and Stakeholder Involvement https://rip.trb.org/View/2480355 Wed, 01 Jan 2025 16:22:03 GMT https://rip.trb.org/View/2480355 Investigation of the Economic Effects of U5809 on Yadkinville - Phase I https://rip.trb.org/View/2452915 Fri, 15 Nov 2024 15:42:50 GMT https://rip.trb.org/View/2452915 Best Practices for Oversized/Overweight Vehicles https://rip.trb.org/View/2420004 Thu, 22 Aug 2024 09:37:21 GMT https://rip.trb.org/View/2420004 Roundabouts, J-Turn, etc. - Understanding their Economic Impacts https://rip.trb.org/View/2414044 Wed, 07 Aug 2024 17:23:45 GMT https://rip.trb.org/View/2414044 Optimizing Complete Streets through Best Practices and Simulation Analysis https://rip.trb.org/View/2397864 Tue, 25 Jun 2024 11:21:09 GMT https://rip.trb.org/View/2397864 A Synthesis Study of Electric Vehicles' Costs, Economic Impacts, and Infrastructure Implications https://rip.trb.org/View/2384873 Mon, 03 Jun 2024 11:49:04 GMT https://rip.trb.org/View/2384873