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/ Evaluating the Cumulative Impact of Environmental Conditions on Stress Levels in Micromobility Users: An AI-Driven Multimodal Approach https://rip.trb.org/View/2652172 Tue, 13 Jan 2026 15:55:16 GMT https://rip.trb.org/View/2652172 Pedestrian Route Choice and Traffic Exposures: A Case Study in Downtown Atlanta https://rip.trb.org/View/2652174 Tue, 13 Jan 2026 15:38:52 GMT https://rip.trb.org/View/2652174 Pedestrian Level of Traffic Stress (PLTS) Validation for Pedestrians with a range of Ages and Abilities https://rip.trb.org/View/2625597 Mon, 17 Nov 2025 14:33:05 GMT https://rip.trb.org/View/2625597 Road User-Automated Vehicle Expectancies, Interactions, and Safety https://rip.trb.org/View/2425405 Thu, 05 Sep 2024 17:04:42 GMT https://rip.trb.org/View/2425405 Refining C3 Context-classification Criteria for Low-income and Minority Populations https://rip.trb.org/View/2404176 Thu, 18 Jul 2024 11:12:55 GMT https://rip.trb.org/View/2404176 Assessing Pedestrian Sight Distance for Crossing Decisions https://rip.trb.org/View/2381747 Thu, 23 May 2024 10:06:12 GMT https://rip.trb.org/View/2381747 BikePed Portal: Pedestrian Volume Estimation Based on Push Button Actuations from Signals Data https://rip.trb.org/View/2361978 Tue, 02 Apr 2024 13:42:35 GMT https://rip.trb.org/View/2361978 Comprehensive Analysis of Factors Influencing Pedestrian Injury Severity at Intersection and Non-intersection Locations in Connecticut https://rip.trb.org/View/2321729 Tue, 16 Jan 2024 12:31:29 GMT https://rip.trb.org/View/2321729 Safety in Connected Automated Vehicles in the Presence of Vulnerable Road Users https://rip.trb.org/View/2292659 Tue, 21 Nov 2023 19:02:23 GMT https://rip.trb.org/View/2292659 PedPal Lite: An ATSC-Independent Safe Intersection Crossing App https://rip.trb.org/View/2292660 Tue, 21 Nov 2023 18:56:38 GMT https://rip.trb.org/View/2292660 Intersection Safety for the Vulnerable https://rip.trb.org/View/2292661 Tue, 21 Nov 2023 18:52:13 GMT https://rip.trb.org/View/2292661 Evaluating Autonomous Vehicles’ Safety Benefits in Mixed Autonomy Scenarios https://rip.trb.org/View/2292640 Mon, 20 Nov 2023 19:35:00 GMT https://rip.trb.org/View/2292640 Measuring Pedestrian Psycho-Physiological Well-Being in the Built Environment https://rip.trb.org/View/2251037 Thu, 21 Sep 2023 15:44:35 GMT https://rip.trb.org/View/2251037 SPR-4816: Pedestrian and Bicyclist Trespassing Impacts on Rail Grade Crossings Safety and Mobility https://rip.trb.org/View/2232851 Thu, 24 Aug 2023 15:15:17 GMT https://rip.trb.org/View/2232851 Before and After Safety Evaluation of California’s and San Diego's Active Transportation Projects https://rip.trb.org/View/2232675 Wed, 23 Aug 2023 20:49:09 GMT https://rip.trb.org/View/2232675