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
Evaluating and Enhancing Public Transit Systems for Operational Efficiency, Service Quality and Access Equity
Ran Wei
Liming Wang , Aaron Golub , Thomas Cova
Regular assessment and improvement of the performance of public transit systems are essential for transit service providers given limited funding and growing public needs. Performance evaluation can help transit agencies identify underperforming services, plan for potential investments, justify investments, and communicate accomplishments and challenges. However, the evaluation of transit system performance is complex and challenging due to the diverse and competing goals of a public transpor...
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Using High-Resolution Bus Detection Data to Improve Travel Time Prediction and Identify Urban Congestion Spots
Miguel Andres Figliozzi
Robert Bertini
Transit travel time, operating speed and reliability all influence service attractiveness, operating cost and system efficiency. These metrics have a long-term impact on system effectiveness through a change in ridership. As part of its bus dispatch system (BDS), the Tri-County Metropolitan Transportation District of Oregon (TriMet) has been archiving automatic vehicle location (AVL) and automatic passenger count (APC) data for all bus trips at the stop level since 1997. In 2014, a new and hi...
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