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 Bike Boxes at Signalized Intersections

Jennifer Dill
Christopher Monsere
The American Community Survey, an annual survey conducted by the US Census Bureau, has recorded a 145% increase over ten years (from 1.8% in 1996 to 4.4% in 2006) in Portland, Oregon residents choosing the bicycle as their primary means of transportation for commuting to work. Despite this increase in bicycling activity, recent surveys have found that more than half of Portland residents limit their bicycling due to traffic safety concerns. Analyses of motor vehicle and police reported crash... Read More