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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.

Research Highlights

Taxing Shared Micromobility: Assessing The Global Landscape Of Fees And Taxes And Their Implications For Cities, Riders, And Operators

John MacArthur
Shared micromobility (including shared electric scooters and bikes provided by private companies) is one of the newest transportation options that has come to cities in the last several decades. A new report explores the different ways cities charge shared micromobility companies to operate, and how these funds are used. In the newly released report, John MacArthur of Portland State University, Kevin Fang of Sonoma State University and Calvin Thigpen of Lime examine data from 120 cities in… Read More

Investigating Effects of TNCs on Parking Demand and Revenues

Benjamin Clark Anne Brown
For the past century, mobility in the United States has been dictated by cars. Furthermore, cars—and even more so, the storage of cars—have dictated urban form. With cities dedicating more space to parking than even streets and roads, parking has become baked into city land use, regulations, codes, ordinances, master plans, and even finances. What happens when a car trip no longer ends in a parking space? Both transportation network companies (TNCs) and, eventually, autonomous vehicles (AVs),… Read More

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