Publications

This study explores opportunities for improving access to transportation affordable programs by gathering insights from existing income qualified transportation benefits. Researchers compare examples of these programs to design features of existing non-transportation benefits to characterize opportunities for increased coordination and standardization.

University of Vermont researchers analyzed national survey data on transportation burdens to evaluate the differences in who experiences transportation burdens in rural versus nonrural areas, the factors that drive these differences, and how to improve mobility and access in rural populations.

This policy brief summarizes findings from the University of Vermont project where researchers sought to answer the question: is the relationship between travel and the built environment the same in urban and rural areas.

This report outlines the technical development and application of the Total Cost of Ownership Spreadsheet Tool (TCOST), a Microsoft Excel-based calculator that simplifies and integrates the main functions, data, and outputs of pre-existing models (MOVES-Matrix and the GREET Model) and other external sources of economic data.

This study develops a framework and first order estimate of the greenhouse gas emissions from the build-out and maintenance and rehabilitation of global roadway infrastructure networks from 2020 to 2050.

This report explores driver charging behavior and their preference for public DC fast charging (DCFC), drawing on Stated Preference (SP) choice experiment data from a survey of 1,102 Plug-in Electric Vehicle (PEV) owners across California.

This project examines multi-hazard risks and the performance of emergency evacuation routes in California using spatial synthesis, mapping, modeling, and performance analysis techniques. It enhances evacuation planning by analyzing road networks under natural hazard scenarios.

This research undertook a battery material flow analysis, life cycle assessment of SHVs traded from the US to Mexico, and a qualitive analysis of environmental and transport justice implications of SHV trade. The research finds that SHVs disproportionately contribute to waste battery generation in Mexico, and that second-hand EVs are frequently retired early due to a lack of repairability.

This report describes several related studies that focus on understanding the opportunities and constraints that people face in changing how they travel in small and rural communities in Vermont and also evaluates the equity implications of gas tax alternatives.

This research explores electric vehicle (EV) and grid interactions with a focus on CO2 emissions through integrating models and data that characterize: vehicle energy consumption, travel demands, vehicle charging, and temporal emission profiles associated with electric power generation dispatch. This convergence research helps quantify the relative emissions of light duty vehicle use and charging during various times of day to enable comparison of EV modes against one another and against conventional vehicle baselines.

The EVALUATE project develops methodology for forecasting emissions outputs of a class of vehicles and use cases. Phase II focuses on targeted case studies that extend prior work from light duty vehicles operated by individuals to service-oriented vehicles operated by small and medium businesses.

This study evaluates differences in travel burdens and the factors that drive them in rural and urban contexts in the United States. Using the 2017 National Household Transportation Survey, the authors first evaluate differences in travel burdens across rural versus urban communities, including i) the magnitude of travel burdens, ii) who experiences travel burdens, and iii) the individual and environmental factors that are associated with travel burdens.

Green Public Procurement is to be understood as a set of policies, actions and practices that leverage acquisitions to address all types of environmental challenges. This white paper lays out the case and a recommended approach for establishing public procurement programs to reduce, as fast as possible, the environmental impacts of keeping and improving transportation infrastructure functionality.

In this report, travel behavior data from the Federal Highway Administration’s National Household Travel Survey is combined with detailed built environment data from the Environmental Protection Agency’s Smart Location Database to evaluate the relationships between personal and built environment factors and sustainable travel behaviors including vehicle miles traveled (VMT) and mode choice.

This report investigates how local governments (cities and counties) are implementing California’s Senate Bill 743, adopted in 2013 to eliminate traffic delay, measured using level-of-service (LOS) standards, as a basis for analyzing and mitigating transportation-related impacts of development projects and plans as called for under the California Environmental Quality Act (CEQA).

Given that today’s real-world diesel fuel supply is comprised of biodiesel as a blendstock with petrodiesel, understanding how addition of biodiesel affects exhaust particle properties and their subsequent effect on human health is critically important. Here, samples of a commercial waste vegetable oil biodiesel B100 fuel were subject to thermal oxidation at 110°C for 5, 10 or 20 hr before diesel engine dynamometer emissions testing as the neat fuel (B100) and as a 20% v/v biodiesel blend (B20) with petrodiesel.

This project evaluates a broad range of factors influencing microtransit adoption and travel behavior among underserved populations using original revealed choice survey data collected from February – May 2024 with online and intercept surveys.

The goal of this project was to assess the capabilities of the travel demand forecasting models (TDMs) used by California’s metropolitan planning organizations (MPOs) with respect to forecasting the increase in vehicle miles of travel induced by highway capacity expansion.

This dissertation examines clean energy supply chains in the context of the just transition and circular economy frameworks, focusing on a central technology for zero-emissions transportation: lithium-ion batteries (LIBs) for electric vehicles (EVs). The author focuses on three phases of the LIB life cycle: mineral extraction, component and cell manufacturing, and end-of-life management.

In this project, the team developed MOVES-Matrix 3.0 based on the existing MOVES Matrix framework, and modified the code to perform the iterative processes with MOVES 3, handle new data formats, and join distributed computing outputs into new matrices.