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
Using Time-Series Analysis to Precisely Identify and Rank Road Hotspots
Alexander Lee Wei Lin
Over the past decades, many ranking methods have been proposed. However, results vary from method to method, and one of the issues behind ranking is the element of subjectivity. One approach to resolve these issues is the use of combined models. One of the combined models is the Enhanced Empirical Bayesian (EB) method that incorporates the use of the similarity measure based on the Proportion Discordance Ratio (PDR). This model is developed to assess and objectively quantify similarity among…
Read More
Identifying and Measuring Transportation Challenges for Survivors in Intimate Partner Violence Shelters
Sarah Leat
Environmental stressors within the built environment can greatly impact health. Environmental stressors, such as noise levels, crowding, and housing quality have been shown to impact physical healing as well as mental health. Although environmental stressors have been examined within healthcare environments, such as hospitals and clinics, very little research exists about the presence of environmental stressors within shelter environments. Furthermore, even less research has looked at…
Read More


