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/ Development of Methods to Produce High-Quality Household-Based VMT Dataset https://rip.trb.org/View/2724823 Wed, 08 Jul 2026 14:46:38 GMT https://rip.trb.org/View/2724823 Low-Frequency High-Impact Travel for Data Analysis https://rip.trb.org/View/2709248 Tue, 02 Jun 2026 13:56:50 GMT https://rip.trb.org/View/2709248 Agentic LLM-powered Synthetic Transportation Agent Response System (AL-STARS) https://rip.trb.org/View/2703689 Fri, 15 May 2026 09:28:30 GMT https://rip.trb.org/View/2703689 Analysis of the Potential Revenue and Equity Impacts of an E-commerce Household Delivery Fee in Oregon https://rip.trb.org/View/2593956 Thu, 28 Aug 2025 14:25:04 GMT https://rip.trb.org/View/2593956 Understanding Drivers of Change in Vehicle Availability and Ownership in North Carolina https://rip.trb.org/View/2452920 Fri, 15 Nov 2024 16:18:17 GMT https://rip.trb.org/View/2452920 Exploring the Changing Dynamics of Household Vehicle Ownership and Use in the U.S. https://rip.trb.org/View/2440045 Thu, 10 Oct 2024 17:16:55 GMT https://rip.trb.org/View/2440045 Investigating Travel Survey Representativeness: Who’s Missing and What Can We Do? https://rip.trb.org/View/2440263 Thu, 10 Oct 2024 16:16:10 GMT https://rip.trb.org/View/2440263 Synthesis Study of Costs and Trip Rates of Recent Household Travel Surveys https://rip.trb.org/View/2233697 Fri, 25 Aug 2023 13:51:09 GMT https://rip.trb.org/View/2233697 Development of an Integrated Model System of Transport and Residential Energy Consumption https://rip.trb.org/View/2143615 Sat, 25 Mar 2023 10:03:56 GMT https://rip.trb.org/View/2143615 Precarious Car Ownership Among Low-Income Households https://rip.trb.org/View/1892214 Wed, 17 Nov 2021 14:03:46 GMT https://rip.trb.org/View/1892214 Investigating Attitudinal and Behavioral Changes in U.S. Households Before, During, and After the COVID-19 Pandemic https://rip.trb.org/View/1746077 Tue, 20 Oct 2020 20:31:18 GMT https://rip.trb.org/View/1746077 The role of transport in how we choose where to live: A qualitative investigation of residential location choice in the Phoenix, AZ region https://rip.trb.org/View/1746071 Tue, 20 Oct 2020 18:25:46 GMT https://rip.trb.org/View/1746071 Latent Vehicle Type Propensity Segments: Considering the Influence of Household Vehicle Fleet Structure https://rip.trb.org/View/1746067 Tue, 20 Oct 2020 18:06:43 GMT https://rip.trb.org/View/1746067 Investigation of E-Commerce Enabled Freight Demand and Activities in Residential Areas https://rip.trb.org/View/1710226 Thu, 04 Jun 2020 10:26:54 GMT https://rip.trb.org/View/1710226 SPR-4413: Assessing the Travel Demand and Mobility Impacts of Transformative Transportation Technologies in Indiana https://rip.trb.org/View/1649120 Tue, 03 Sep 2019 08:54:54 GMT https://rip.trb.org/View/1649120