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

Connecting people to places: spatiotemporal analysis of transit supply using travel-time cubes

Steven Farber
Transit planning traditionally emphasizes the spatial dimension of accessibility; networks are built to bridge locations in the city with the assumption that the provision of spatial connectivity is equivalent to providing people with access to their destinations. However, often underrepresented in transit analyses, is that travel time, not network proximity, is the fundamental unit of influence over people's travel behavior. It is the time lost in travel that drives whether or not people will… Read More

What do we know about Location Affordability in U.S. Shrinking Cities?

Joanna Ganning Keith Bartholomew , J. Rosie Tighe
This research led the Department of Housing and Urban Development (HUD) to rethink the way they use their Location Affordability Index (LAI). From Josh Geyer, Office of Environment and Energy, High-Performance Buildings Team, U.S. Department of Housing and Urban Development: "Dr. Ganning’s thorough and convincing analysis of the strengths and weaknesses of the Location Affordability Index led HUD to rethink using Census block groups as the geographical unit of analysis. As a result, Version 3… Read More