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 Real-Time Corridor Modeling and Health Impact Assessment using Dynamic Vehicle Fleet Composition Data https://rip.trb.org/View/2652183 Tue, 13 Jan 2026 14:20:30 GMT https://rip.trb.org/View/2652183 Quantifying the Influence of Driver Behavior on Greenhouse Gas Emissions and Air Quality https://rip.trb.org/View/2606557 Fri, 03 Oct 2025 15:02:52 GMT https://rip.trb.org/View/2606557 The Effects of Road Types and Construction Activities on Particulate Matter and Development of Best Practices for PM2.5 Reduction https://rip.trb.org/View/2604527 Mon, 29 Sep 2025 16:24:57 GMT https://rip.trb.org/View/2604527 Monitoring and Speciation of Particulate Matter Under 2.5 Microns (PM2.5) Composition across Texas Counties https://rip.trb.org/View/2593191 Tue, 26 Aug 2025 12:42:34 GMT https://rip.trb.org/View/2593191 Microplastic Air Pollution from the Wear of Vehicle Tires https://rip.trb.org/View/2582930 Tue, 05 Aug 2025 15:42:13 GMT https://rip.trb.org/View/2582930 An Economical and Sustainable Dust Suppressant for Gravel Roads https://rip.trb.org/View/2508967 Wed, 12 Feb 2025 12:37:54 GMT https://rip.trb.org/View/2508967 Curbing Emissions: Enhancing Sustainability Through Collaborative Shipment in Horizontal Supply Chains https://rip.trb.org/View/2420218 Sat, 24 Aug 2024 10:56:54 GMT https://rip.trb.org/View/2420218 Highway Construction Impact on Air Quality https://rip.trb.org/View/2417309 Wed, 14 Aug 2024 14:07:14 GMT https://rip.trb.org/View/2417309 Update ACRP Report 84: Guidebook for Preparing Airport Emissions Inventories for State Implementation Plans https://rip.trb.org/View/2413894 Mon, 05 Aug 2024 17:57:57 GMT https://rip.trb.org/View/2413894 ReACh: Resuspension Emissions Based on Aerodynamic Characteristics https://rip.trb.org/View/2410440 Wed, 31 Jul 2024 16:38:50 GMT https://rip.trb.org/View/2410440 A Granular Characterization of Mobility-Related Air Pollution Exposure Disparity https://rip.trb.org/View/2350714 Mon, 11 Mar 2024 21:35:36 GMT https://rip.trb.org/View/2350714 Impact of Freight Activity in and Around Ports https://rip.trb.org/View/2335159 Tue, 06 Feb 2024 16:53:49 GMT https://rip.trb.org/View/2335159 Evaluating Carbon Reduction in Project Selection and Planning https://rip.trb.org/View/2329694 Wed, 31 Jan 2024 17:48:16 GMT https://rip.trb.org/View/2329694 Air Quality Inside Buses https://rip.trb.org/View/2149961 Mon, 10 Apr 2023 17:08:13 GMT https://rip.trb.org/View/2149961