TREC’s broad research program addresses complex transportation problems by drawing on multiple disciplines, including engineering, planning, economics and design, from across the Portland State University campus. Browse the featured projects below or 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

Empirical Observation of the Impact of Traffic Oscillations on Freeway Safety

Christopher Monsere
Soyoung Ahn
Traffic oscillations (also known as stop-and-go driving) are a typical feature of congested traffic flow. They are known to increase fuel consumption and emissions, and decrease driving comfort. It is also speculated that larger amplitudes of oscillations (i.e. larger changes in flow or speed) increase the probability of certain crash types (e.g. rear-end crashes). However, no current study exists that irrefutably confirms or disproves this speculation. The objective of this research is to f... Read More

Evaluation of an Eco-driving Intervention: Changing Knowledge, Attitudes, and Behavior by Means of Supervisor Support

Donald Truxillo
John MacArthur , Leslie Hammer , Talya N. Bauer
Past eco-driving research has looked at the effectiveness of various eco-driving programs, but the role supervisor and organizational support have remained unexamined. This is unfortunate, as support from the supervisor and the organization have consistently been shown to determine whether or not employee interventions (e.g., training, safety) are effective (e.g., Christian et al. 2009; Salas et al., 2012). In other words, supervisor and organizational support are important for translating em... Read More