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
Advancing Safety At Intersections: Measuring The Effectiveness Of Traffic Signal Strategies For Speed Management On Operations And Safety
Sirisha Kothuri
Many states are adopting the Safe System approach (USDOT, 2022) to improve traffic safety. As the role of speed in injury severity is becoming increasingly clear, one of the key elements of a Safe System approach is Safer Speeds. Specifically, higher motor vehicle speeds lead to higher injury severity during a collision, especially for nonmotorized users (Rosén and Sander 2009; Tefft 2013) who are the most vulnerable users in the transportation system. Most pedestrian crashes occur on higher…
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Understanding Travel Behavior and Accessibility for Older Adults: A Comprehensive Framework
E-Sok Andy Hong Xiaoyue Cathy Liu
Accessibility plays a fundamental role in the day-to-day lives of individuals. However, the COVID-19 pandemic has highlighted the gross inequality in older people’s accessibility to health care and essential services. Months of staying inside, with limited social interactions, reduced opportunities for physical activity, and limited access to health and social care has accelerated the aging process for large numbers of older people and taken a huge toll on their physical and mental health…
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