TREC research addresses complex transportation problems by drawing on multiple disciplines, including engineering, planning, economics and design, from across the Portland State University campus. Use the search box at right to search for a specific project.

Research Highlights

Sustaining Multimodal Choices: Examining Travel Behavior for Non-work Trips Beyond COVID-19

Yizhao Yang Rebecca Lewis
Abstract Travel by sustainable modes such as public transit, biking, and walking provides positive outcomes for urban residents for the environment and health. Integrating these mode choices into regular travel trips has been challenging for many Americans. The low adoption of sustainable travel modes has been attributed to environmental factors, and to attitudinal and habitual tendencies rooted in an individual’s beliefs and experiences. The proposed project focuses on understanding the… Read More

Assessing State Efforts to Integrate Transportation, Land Use and Climate Change

Rebecca Lewis Rob Zako
Climate change is increasingly recognized as a threat to life on earth. “Continued emissions of greenhouse gases (GHG) will cause further warming and changes in all components of the climate system. Limiting climate change will require substantial and sustained reductions of GHG emissions.” (IPCC WGI, 2013.) The transportation sector accounts for almost one-third of all GHG emissions in the United States. Growing Cooler describes GHG emissions from transportation as comprised of a three… Read More