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/ Micromobility Decision-Making Atlas https://rip.trb.org/View/2669653 Sun, 15 Feb 2026 16:30:25 GMT https://rip.trb.org/View/2669653 Enabling Mobility for Older Adults in the US https://rip.trb.org/View/2669552 Thu, 12 Feb 2026 15:16:36 GMT https://rip.trb.org/View/2669552 Wildlife Fencing Effectiveness in Reducing Crashes in the Western US https://rip.trb.org/View/2655748 Mon, 19 Jan 2026 08:33:19 GMT https://rip.trb.org/View/2655748 Quick-Response Research on Long-Term Strategic Issues. Task 56. Student Fare Programs to Increase Ridership https://rip.trb.org/View/2636148 Mon, 08 Dec 2025 20:08:55 GMT https://rip.trb.org/View/2636148 TCRP Study Update on Local and Regional Funding Mechanisms for Public Transportation https://rip.trb.org/View/2636145 Mon, 08 Dec 2025 19:55:17 GMT https://rip.trb.org/View/2636145 Regional Disparities in Work Zone Crashes: Understanding Factors and Predictive Modeling for Targeted Safety Measures https://rip.trb.org/View/2627354 Wed, 19 Nov 2025 15:35:55 GMT https://rip.trb.org/View/2627354 Investing in Talent for Next-Generation Transportation Engineering https://rip.trb.org/View/2627155 Wed, 19 Nov 2025 14:58:25 GMT https://rip.trb.org/View/2627155 Synthesis of Information Related to Airport Practices. Topic S01-33. Practices for Determining Landing Fees at General Aviation Airports https://rip.trb.org/View/2621998 Mon, 10 Nov 2025 19:25:41 GMT https://rip.trb.org/View/2621998 Identification of Factors Contributing to the Decline of Traffic Fatalities in the United States https://rip.trb.org/View/2611417 Mon, 20 Oct 2025 17:48:26 GMT https://rip.trb.org/View/2611417 Guide for Airports to Mitigate Outdoor Worker Exposure to Extreme Temperature Conditions https://rip.trb.org/View/2588331 Tue, 12 Aug 2025 10:23:12 GMT https://rip.trb.org/View/2588331 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 Development of U.S. Vehicle Capacity Models for Multilane and Turbo Roundabouts https://rip.trb.org/View/2558402 Wed, 28 May 2025 09:52:47 GMT https://rip.trb.org/View/2558402 Legal Aspects of Airport Programs. Topic 16-03. Legal Requirements and Liabilities Arising from Airport Security https://rip.trb.org/View/2555868 Tue, 20 May 2025 14:39:09 GMT https://rip.trb.org/View/2555868 Protecting People in Midwest Road and Transport Systems During Periods of Extreme Heat https://rip.trb.org/View/2553660 Thu, 15 May 2025 15:02:06 GMT https://rip.trb.org/View/2553660 Analysis and Implications of the Vehicle Inventory and Use Survey (VIUS) https://rip.trb.org/View/2549196 Mon, 05 May 2025 15:14:35 GMT https://rip.trb.org/View/2549196