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/ Digital Twin Modeling of NOx Formation from Transient Vehicle Operations in Hilly Terrains https://rip.trb.org/View/2652170 Tue, 13 Jan 2026 16:14:22 GMT https://rip.trb.org/View/2652170 Bridging Data Gaps with Modeled Data from Generative AI: Advancing Health in Transportation Research https://rip.trb.org/View/2652171 Tue, 13 Jan 2026 16:10:26 GMT https://rip.trb.org/View/2652171 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 Improving Vehicle Cabin Air Quality in Daily Transportation https://rip.trb.org/View/2652182 Tue, 13 Jan 2026 14:25:51 GMT https://rip.trb.org/View/2652182 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 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 Cabin Air Safety https://rip.trb.org/View/2582997 Tue, 05 Aug 2025 18:22:26 GMT https://rip.trb.org/View/2582997 Evaluate Speed Estimation Techniques for EPA Moves Model Input Using Big Data and Travel Demand Models for Regional Conformity Analysis https://rip.trb.org/View/2562324 Mon, 09 Jun 2025 08:02:14 GMT https://rip.trb.org/View/2562324 Framework for Enhanced Model Evaluations for Project-Level Air Quality Analyses https://rip.trb.org/View/2558418 Mon, 26 May 2025 22:32:46 GMT https://rip.trb.org/View/2558418 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 Examining the Impacts of Land Use on Air Quality in Chicago: Application of Street View Imagery and Hyperlocal Urban Climate Sensing https://rip.trb.org/View/2459119 Sat, 23 Nov 2024 11:00:49 GMT https://rip.trb.org/View/2459119 Understanding of Tire-Wear Gaseous Emissions and their Impact on Secondary Aerosol Formation from On-Road Vehicles https://rip.trb.org/View/2427675 Thu, 12 Sep 2024 15:20:20 GMT https://rip.trb.org/View/2427675 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 Development of a Project-Scale Air Quality Screening Tool https://rip.trb.org/View/2417471 Fri, 16 Aug 2024 09:17:32 GMT https://rip.trb.org/View/2417471