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

Improving Bicycle Crash Prediction

Krista Nordback
Sirisha Kothuri , Wesley Marshall
The 2010 Highway Safety Manual (HSM) provides methods for predicting the number of motor vehicle crashes on various roadway facilities. However, it includes only a rudimentary method for predicting the number of bicycle-related crashes. Despite research demonstrating that bicycle volume is an important factor in estimating number of bicycle crashes, the method does not include the volume of bicyclists using the roadway. To remedy this, this project will investigate the potential of variou... Read More

Green and Economic Fleet Replacement Modeling

David Kim
Miguel Figliozzi , David Porter
All DOTs maintain large fleets of equipment for the maintenance and upkeep of roads and highways. An important and difficult part of managing such a large amount of equipment is deciding what equipment should be replaced and when. Such decisions have a clearly documented economic impact, and also affect the ability of the fleet to provide required equipment when needed. There is however, very little consistency in how several surveyed DOTs across the nation make replacement decisions. Further... Read More