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/ A Framework for Integrated Quality of Service Evaluation using Operational and Safety Considerations https://rip.trb.org/View/2703926 Thu, 21 May 2026 22:41:30 GMT https://rip.trb.org/View/2703926 Investigating the Critical Success Factors for Technology Adoption in Transportation Safety Systems https://rip.trb.org/View/2703924 Wed, 20 May 2026 09:18:35 GMT https://rip.trb.org/View/2703924 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 Artificial Intelligence (AI) Applications to Enhance Transportation Safety https://rip.trb.org/View/2563983 Mon, 16 Jun 2025 09:54:17 GMT https://rip.trb.org/View/2563983 Support for AASHTO Committees and Councils. Development of Modern Active Transportation Research Roadmap https://rip.trb.org/View/2348474 Fri, 08 Mar 2024 09:46:06 GMT https://rip.trb.org/View/2348474 Safety and Public Health Impacts of Microtransit Services https://rip.trb.org/View/2325388 Fri, 19 Jan 2024 10:28:43 GMT https://rip.trb.org/View/2325388 Improving Livability: Identifying Operational and Access Barriers to Active Transportation in Connecticut Communities https://rip.trb.org/View/2321727 Tue, 16 Jan 2024 12:18:09 GMT https://rip.trb.org/View/2321727 Incorporating Large Language Models (LLMs) into Transportation Safety Analytics https://rip.trb.org/View/2321641 Fri, 12 Jan 2024 10:46:26 GMT https://rip.trb.org/View/2321641 Administration of Highway and Transportation Agencies. Collective and Individual Actions to Envision and Realize the Next Era of America’s Transportation Infrastructure—Phase 2 https://rip.trb.org/View/2067949 Tue, 22 Nov 2022 22:37:24 GMT https://rip.trb.org/View/2067949 Rapid Safety Assessment Tool for Non-Conventional Roadway Designs and Emerging Technologies: Innovative Artificial Intelligence Application https://rip.trb.org/View/1877735 Thu, 09 Sep 2021 17:14:08 GMT https://rip.trb.org/View/1877735 Expanding Mobility Options for All: Optimizing and Extending the Biking Infrastructure to Generate Complete Street Networks in Atlanta https://rip.trb.org/View/1756014 Sat, 05 Dec 2020 18:38:44 GMT https://rip.trb.org/View/1756014 Low Cost 3-D LIDAR Development for Transportation https://rip.trb.org/View/1741270 Fri, 25 Sep 2020 15:12:15 GMT https://rip.trb.org/View/1741270 Mobility, Access, and Safety https://rip.trb.org/View/1683686 Mon, 10 Feb 2020 12:57:23 GMT https://rip.trb.org/View/1683686 Moving Research into Practice. Implementation of NCHRP Research Report 893: The Oregon DOT Statewide Pedestrian and Bicycle Plan https://rip.trb.org/View/1640416 Mon, 22 Jul 2019 20:35:11 GMT https://rip.trb.org/View/1640416 Unmanned Aircraft Systems Impact on Operational Efficiency and Connectivity https://rip.trb.org/View/1578498 Fri, 11 Jan 2019 15:36:24 GMT https://rip.trb.org/View/1578498