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.

NOTE: If you're looking for projects from our partner campuses, use the NITC research search.

Research Highlights

Incorporating Pedestrian Considerations into Signal Timing

Sirisha Kothuri
The role of walking in the development of healthy, livable communities is being increasingly recognized. In urban areas, intersections represent locations where different modes converge, and are often viewed as deterrents to walking. This is due to the unwarranted and often unnecessary delays imposed by signal timing policies for pedestrians and increased potential for conflicts. Traditional signal timing design prioritizes vehicles over pedestrians leading to undesirable consequences such as... Read More

Vehicle acquisition and disposal/ Multi-modal Household Vehicle Fleets and Residential Location Choices

Roger Chen
Vehicle availability significantly affects household travel behaviors and consequently affects the requirements for modeling and forecasting of household travel decisions under future or alternative scenarios. Household vehicle fleets are not acquired instantaneously, but evolve over time as a result of fleet transactions, which include vehicle (i) disposal or retirement, (ii) replacement and (iii) acquisition decisions. Parallel to this forecasting need, is the increasing diversification of ... Read More