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 Quantifying the Impacts of UTA's Frequent Transit Network on Congestion, Safety, and Mode Shift https://rip.trb.org/View/2784728 Wed, 30 Sep 2026 18:16:22 GMT https://rip.trb.org/View/2784728 How is Utah Doing with Transit Performance? https://rip.trb.org/View/2784725 Wed, 30 Sep 2026 17:28:21 GMT https://rip.trb.org/View/2784725 The Impact of Light Rail in Utah - A Before-and-After Study https://rip.trb.org/View/2784724 Wed, 30 Sep 2026 17:12:42 GMT https://rip.trb.org/View/2784724 Impact of Positive Train Control https://rip.trb.org/View/2780472 Wed, 23 Sep 2026 18:03:05 GMT https://rip.trb.org/View/2780472 Public Transit Automation and the Future of Service Delivery: Scenario Planning for Operations and Workforce Readiness https://rip.trb.org/View/2780207 Fri, 18 Sep 2026 10:34:51 GMT https://rip.trb.org/View/2780207 Advancing Accessible Bus Transit: Human-Machine Interfaces for Inclusive Communication and Safe Boarding of Passengers with Disabilities https://rip.trb.org/View/2778268 Fri, 18 Sep 2026 10:09:11 GMT https://rip.trb.org/View/2778268 Monitoring of Urban Roadway Safety Hazards from Existing Bus-based Video Imagery: Phase 3 https://rip.trb.org/View/2778234 Thu, 17 Sep 2026 17:08:14 GMT https://rip.trb.org/View/2778234 Development of A Testbed for Automated Emergency Braking (AEB) Technology for Buses https://rip.trb.org/View/2692309 Thu, 10 Sep 2026 08:41:29 GMT https://rip.trb.org/View/2692309 Update of ACRP Report 4: Ground Access to Airports by Public Transportation https://rip.trb.org/View/2772536 Thu, 03 Sep 2026 08:39:47 GMT https://rip.trb.org/View/2772536 Synthesis of Information Related to Transit Practices. Topic SC-10. Planning and Implementation Considerations for Alternative Propulsion Transit Vehicles in Rural Public Transportation https://rip.trb.org/View/2772538 Thu, 03 Sep 2026 08:35:03 GMT https://rip.trb.org/View/2772538 Synthesis of Information Related to Transit Practices. Topic SA-68. System Reliability – Documenting Variations in On-Time Performance and Service Consistency Metrics https://rip.trb.org/View/2772544 Wed, 02 Sep 2026 17:21:43 GMT https://rip.trb.org/View/2772544 Synthesis of Information Related to Transit Practices. Topic SG-23. Data-Driven Approaches for Optimizing Transit Parts Procurement, Lead Time Risk, and Critical Spare Parts Planning https://rip.trb.org/View/2772554 Tue, 01 Sep 2026 17:16:59 GMT https://rip.trb.org/View/2772554 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 Synthesis of Information Related to Transit Practices. Topic SE-09. Transit Cleanliness – Understanding the Current Condition and Perceptions Across the Transit Industry https://rip.trb.org/View/2772560 Tue, 01 Sep 2026 11:28:49 GMT https://rip.trb.org/View/2772560