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

Practical Approximations to Quantify the Impact of Time Windows and Delivery Sizes on Freight VMT in Urban Areas

Miguel Figliozzi
Supply chains and urban areas cannot thrive without the efficient movement of goods and accessibility to services. Commercial vehicle flows and VMT are the ultimate materialization of supply chain activities in the public road network (Figliozzi, 2006). From a freight planning perspective, it is crucial to understand and quantify how routes and distribution decisions translate into commercial VMT. A recent study indicates that commercial vehicles carrying goods or providing services acco... Read More

Improved Pedestrian Safety at Signalized Intersections Operating the Flashing Yellow Arrow

David Hurwitz
Christopher Monsere
Transportation facilities, when designed appropriately, attempt to provide a balance between safety and efficiency while acknowledging the design implications on their most vulnerable users. At signalized intersections, pedestrians are considered to be amongst the most vulnerable. When in the crosswalk at intersections without protected left-turn phasing, pedestrians are particularly at risk from left-turning vehicles. Though legally required to yield to opposing though vehicles and pedest... Read More