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

Maternal Mental Health and Keetoowah Women: Past, Present, and Future

December Maxwell
American Indian/Native American (AI/NA) women experience postpartum depression (PPD) at a disproportionate rate. Poor transportation services and systems increase the risk of PPD prevalence in AI/NA populations, particularly since those in more rural areas have a marked deficit in reliable, safe, and affordable transportation. Little research exists exploring the specific experiences of Native women during the postpartum period relating transportation barriers and use to their culture, birthing… Read More

Key Enhancements to the WFRC/MAG Four-Step Travel Demand Model

Reid Ewing Shima Hamidi
Conventional four-step travel demand modeling is overdue for a major update. The latest NITC report from the University of Utah offers planners better predictive accuracy through an improved model, allowing for much greater sensitivity to new variables that affect travel behavior. Specifically, it accounts for varying rates of vehicle ownership, intrazonal travel, and multimodal mode choices. Used by nearly all metropolitan planning organizations (MPOs), state departments of transportation,… Read More