Who We Are


We inform transportation decision making through research, building the capacity of the transportation workforce, supporting the education of future transportation professionals, and engaging students in research. 

The Transportation Research and Education Center (TREC) at Portland State University (PSU) is first and foremost an interdisciplinary center. Our research initiatives pull together the voices and expertise of a wide range of backgrounds that collectively shape the ways we move through the world. We support collaborative research and education that provide a unique lens on transportation insight for vibrant communities.

We manage a multitude of programs, grants, and projects - including:

  • As the campus-wide transportation center, we provide education and collaborative research opportunities that improve mobility on campus, in the City of Portland, and the greater Metro region. Notably, we have been hosting free, weekly Friday Transportation Seminars for the public since 2000.

  • We are the lead campus of the National Institute for Transportation and Communities (NITC) — one of seven University Transportation Centers (UTC's) funded by the U.S. Department of Transportation. We pursue our theme, improving mobility of people and goods to build strong communities, through research, education and technology transfer in conjunction with our partner universities: University of Oregon, Oregon Institute of Technology, University of Utah and new partners University of Arizona and University of Texas at Arlington.

  • The Initiative for Bicycle and Pedestrian Innovation (IBPI), which shares active transportation insight with professionals and educators through training opportunities, conferences and outreach.

Our History

Our faculty expertise in innovative transportation research and education earned Portland State a federally funded university transportation center in 2006. That grant, named OTREC, ran through 2014. Portland State used its success in running the OTREC grant program to successfully compete for a second U.S. Department of Transportation grant that became the NITC program. That program was later extended and renewed, with the center competing successfully to be designated one of U.S. DOT's seven national university transportation centers.

About Portland State University

As Oregon's only urban public global research university, Portland State University offers tremendous opportunity to nearly 28,000 students from all backgrounds. Our mission to "Let Knowledge Serve the City" reflects our dedication to finding creative, sustainable solutions to local and global problems. Our location in the heart of Portland, one of America's most dynamic cities, gives our students unmatched access to career connections and an internationally acclaimed culture scene. "U.S. News & World Report" ranks us among the nation's top 10 most innovative universities.

Our Team at Portland State University


Jennifer Dill, Ph.D.
Professor, Nohad A. Toulan School of Urban Studies and Planning
503-725-5173 | jdill@pdx.edu
Twitter | TREC Researcher Profile

Dr. Jennifer Dill is a professor in the Nohad A. Toulan School of Urban Studies and Planning at Portland State University (PSU) and Director of the Transportation Research and Education Center (TREC) at PSU. TREC houses the National Institute for Transportation and Communities (NITC), which she also directs. NITC is a national university transportation center funded by the US Department of Transportation focusing on improving mobility for people and goods to build stronger communities. Dr. Dill also serves on the Board of Trustees for the TransitCenter, a New York-based foundation that works to improve public transit in cities across the U.S. Professor Dill is an internationally known scholar researching the relationships between transportation, land use, health and the environment, focusing on active transportation. Before entering academia, Professor Dill worked as an environmental and transportation planner in California. That experience motivates her teaching and research, which aims to inform practice and policy. She has published extensively in peer-review journals and has served as principal investigator or co-PI on over $4.3M in research projects and over $28M in federal center funding. Her research has been covered by Wired, Governing, USA Today, the PBS NewsHour, Here and Now, Marketplace and the Atlantic. She has served on and chaired Transportation Research Board committees and is on the editorial boards of the Journal of Transportation and Health, Transportation Research Record and the Journal of Transportation and Land Use. Professor Dill also serves on the Board of Trustees for the TransitCenter, a foundation that works to improve public transit across the U.S. Prior to entering academia, Dr. Dill worked as an environmental and transportation planner in California. Dr. Dill has a Ph.D. in City and Regional Planning from UC Berkeley, an MA in Urban Planning from UCLA, and a BS in Environmental Policy Analysis and Planning from UC Davis. She is also an aluma of the Eno Future Leaders program. See her researcher profile here.

Hau Hagedorn
Associate Director

503-725-2833 | hagedorn@pdx.edu
Twitter | TREC Researcher Profile

Hau is the Associate Director of TREC at Portland State University and is responsible for the day-to-day management, operations and provides overall direction for the TREC's peer-reviewed research and technology transfer programs, and shaping workforce development efforts. She actively participates in national efforts on conducting and implementing research. She also oversees programming and delivery of professional development workshops through the Initiative for Bicycle and Pedestrian Innovation (IBPI). She is co-Chair of the TRB Conduct of Research Committee, Chair of the Oregon Bicycle and Pedestrian Advisory Committee (OBPAC), and member of the Region 1 Area Commission on Transportation (R1ACT). Hau has over 20 years of public and private sector experience in transportation. In her spare time, she runs to escape juggling the busy lives of three active kids.  

Lacey Friedly
Communications Coordinator

503-725-8545 | rlacey@pdx.edu

Lacey is the communications coordinator for TREC. She connects with researchers, writes articles, and documents (through pictures, videos, and model towns) the value of the transportation research being done at TREC and through the NITC program. Before TREC, Lacey was the acquisitions editor for Dark Discoveries magazine. She also managed the editing department at Ooligan Press, Portland State University's student-run publishing house. She graduated from PSU in 2013 with a master's in book publishing. In her spare time Lacey enjoys swimming, reading, and making stop-motion animation videos. she/her/hers

Tammy Lee, Ph.D.
Transportation Data Program Administrator

503-725-2884 | leetam@pdx.edu

Tammy is working on a variety of projects for TREC, including documentation, data synthesis, analysis, and visualization supporting ongoing work with PORTAL and Bike-Ped Portal. Tammy received a BS in Genetics & Plant Biology from UC Berkeley before earning a PhD in Environmental and Natural Resource Sciences from WSU. Prior to joining TREC she worked as a data scientist for a political digital media consulting firm. When not working she's either hiding in the forest or experimenting in the kitchen.

John MacArthur
Sustainable Transportation Program Manager

503-725-2866 | jhmacart@pdx.edu
Twitter | TREC Researcher Profile

Mr. John MacArthur is the Sustainable Transportation Program Manager at TREC at Portland State University and an instructor in civil and environmental engineering, teaching on new & emerging technologies in transportation. He is active in research related to sustainable and equitable transportation, particularly in the areas of emerging tech such as e-bikes, bike share, transit, and the relationship between transportation and public health. Mr. MacArthur is the Section Chair for Transportation Research Board’s AME00 Transportation and Society and a member of Innovative Public Transportation Services and Technologies (AP020). He received his BS in Civil Engineering from Lehigh University and a MS in Environmental Health Sciences from the School of Public Health at the University of Michigan.

Cait McCusker
Communications Director

503-725-2843 | cmccusker@pdx.edu

Cait joined the TREC team in fall 2017 with an extensive background in event planning and strategic communications for green building policy and design. An avid biker and long-time volunteer with pedestrian advocacy group Oregon Walks, she is excited to tackle the dissemination of the center's progressive portfolio of transportation research on mobility. Storytelling is a critical piece to moving research from the theoretical realm to practical application, and Portland is the perfect transportation landscape for this. She served as the Chair of the 2019 Association of Pedestrian and Bicycle Professionals conference, and is currently the Board Chair of Professional Development for the Portland Chapter of WTS. Off-hours she spends her time with Tomato the Dog, tending to her 82 house plants, or biking around the city.

Brendan Williams
Research and Grants Program Administrator
503-725-2863 | brendan.williams@pdx.edu

Brendan is responsible for TREC’s day-to-day research project management and metrics tracking from inception to close-out. Also, he administers the competitive, peer-reviewed, project selection process including the annual Request for Proposal, Pooled Fund, small starts, and dissertation fellowships. Prior to this, he provided financial management and project coordination for Oregon State University’s Precollege Programs. Brendan enjoys playing soccer, going on long bike rides, traveling to other countries, or, most often, making pizza.


Jai Daniels
Advisor: John MacArthur
Jai Daniels is a first-year Master of Urban and Regional Planning (MURP) student at PSU, currently working with John MacArthur on a Transportation Recovery Plan for the Regional Disaster Preparedness Organization (RPDO). Read more about Jai in this March 2021 Student Spotlight interview. She is interested in urban livability, bicycle and pedestrian planning, transit planning, and the intersection between urban planning and the environment.

Kyuri Kim
Advisor: Jennifer Dill
Kyu Ri is a second-year Ph.D. student in urban planning at the Nohad A. Toulan School of Urban Studies and Planning. She is currently supporting Jennifer Dill and Nathan McNeil on the Research Roadmap for the AASHTO Council on Active Transportation. In the recent past, she supported Dr. Dill and Hau Hagedorn in transportation data analysis and visualization (including BikePed Portal and OHSU Census data) and other transportation research.

Rebeca Petean
Advisor: John MacArthur and Marisa Zapata
Rebeca Petean is a second-year Sociology Ph.D. student. Currently, she has taken on the role of Graduate Research Assistant for PSU’s Homelessness Research Action Collaborative (HRAC) joint venture with TREC on the project TCRP J-11/Task 40: Homelessness: A Guide for Public Transportation. She has also served as an Adjunct Instructor teaching Research Methods for Dominican University. She earned her Bachelor of Arts in Criminology and Criminal Justice, 2011, Masters of Science in Criminology and Criminal Justice, 2015, and Graduate Certification in Teaching Adult Learners from PSU, 2015. Her research interests include School-to-Prison Pipeline, Criminal Justice Decision-making, Police-Community Interactions, Developmental/Life Course Theory, Transportation Equity, and Justice.

Nora Stoelting
Transportation Education Program Coordinator
Advisor: Hau Hagedorn
503-725-2896 | treceducation@pdx.edu
Nora integrates tactical urbanism projects into PSU classes via the PSU Better Block PSU pathway program, and also designs the curriculum for TREC's transportation summer camp for Oregon high school students. She is pursuing a dual master's in Leadership for Sustainability Education and Urban and Regional Planning, and is excited about the ways these two programs intersect in building a more dynamic, connected, and sustainable world. Though she loves exploring outdoor recreation in the great state of Oregon, she is originally from the concrete jungle of Brooklyn, NY. She believes strongly in the power of collaborative, holistic, experiential teaching and learning to transform ourselves and the world. Outside of school and work, Nora likes to search for new trail races to run, plan outdoor adventures, answer people's questions about recycling, and go for long walks while listening to podcasts. Learn more about Nora in our Sept. 2020 Student Spotlight interview.

Our Core Researchers at Portland State University

We embrace interdisciplinary research by exploring the unique ways in which transportation intersects with so many aspects of our daily lives. Below are the core of our research faculty and staff, but you can find our comprehensive list of contributors in our Researcher Directory.


Joseph Broach, Ph.D.
Researcher Modeler, Oregon Metro
Research Associate, College of Urban & Public Affairs

Joe Broach's research projects include Incorporate Emerging Travel Modes in the Regional Strategic Planning Model (RSPM) ToolTransferability & forecasting of the Pedestrian Index Environment (PIE) for modeling applications, and Travel Mode Choice Framework Incorporating Realistic Bike and Walk Routes.

Kelly Clifton, Ph.D.
Associate Dean for ResearchMaseeh College of Engineering & Computer Science

Professor of civil and environmental engineering, 2016 Fulbright Scholar, and major contributer to multimodal modeling. She has led research efforts into Contextual Influences on Trip Generation, Examining Consumer Behavior and Travel Choices, the Development of a Pedestrian Demand Estimation Tool and more.

Jennifer Dill, Ph.D.
Director, Transportation Research and Education Center (TREC)
Professor, Urban Studies and Planning
Twitter | Website | Researcher Profile | PSU Profile

Director of TREC and the National Institute for Transportation and Communities (NITC), Jennifer is also a professor of urban studies and planning. Currently serving as Interim Vice President of Research at Portland State University, she is an internationally cited researcher on sustainable transportation. Among her research projects are Lessons from the Green Lanes: Evaluating Protected Bike Lanes in the U.S., Understanding Types of Cyclists Nationally, Pedestrian Observation and Data Collection Curriculum and more. See her researcher profile here.

Miguel Figliozzi, Ph.D.
Professor, Civil and Environmental Engineering

WebsiteResearcher Profile | PSU Profile

Professor of civil and environmental engineering, director of the Transportation Technology and People (TTP) research lab, widely cited scholar and member of the Transportation Research Board Network Modeling Committee and Transportation and Logistics Committee. His research investigates things like the Impact of Advanced Technologies on Livability and Multimodal Transportation Performance Measures in Arterial CorridorsExploiting New Data Sources to Quantify Arterial Congestion and Performance Measures at a Regional Scale, and more.

Aaron Golub, Ph.D.
Director, Nohad A. Toulan School of Urban Studies and Planning
Urban Studies and Planning
TwitterResearcher Profile | PSU Profile

Aaron's research explores policy, finance, environmental justice, public transportation, sustainability, bicycle transportation, social change, the Distributional Effects of Regional Transportation Plans and Projects, Planning for livable communities, and more.

Sirisha Kothuri, Ph.D.
Senior Research Associate, Maseeh College of Engineering and Computer Science

Sirisha Kothuri's research includes investigations into Incorporating Pedestrian Considerations into Signal TimingImproving Walkability Through Control Strategies at Signalized IntersectionsAddressing Bicycle-Vehicle Conflicts with Alternate Signal Control Strategies and Improving Bicycle Crash Prediction.

Jenny Liu, Ph.D.
Associate Professor, Urban Studies and Planning

Assisant professor of urban studies and planning, assistant director of the Northwest Economic Research Center, and noted environmental and resource economist. Jenny Liu's research has looked into Understanding the economic impacts of urban greenway infrastructureMeasuring the Impacts of Social Media on Advancing Public Transit, and the Economic and Business Impacts of Street Improvements for Bicycle and Pedestrian Mobility.

John MacArthur
Sustainable Transportation Program Manager, Transportation Research & Education Center (TREC)

Mr. MacArthur currently manages a complex Federal Transit Administration (FTA) grant to Develop and Test an Emergency Transportation Recovery Plan for the Portland, Oregon Region. This project requires close coordination and collaboration with a variety of public agency partners including city of Portland emergency management and transportation bureaus in addition to transit and other agencies critical to the region’s emergency transportation recovery efforts. In addition, this project is creating national training program that will be tested in six cities in early 2018. MacArthur is the Principal Investigator for TREC's electric bicycle research initiatives. His research also includes low-/no-emission vehicle infrastructure in Portland metro, as well as a climate change impact assessment for surface transportation in the Pacific Northwest and Alaska. Before joining the TREC staff, John was the Context Sensitive and Sustainable Solutions Program Manager for the Oregon Department of Transportation’s OTIA III State Bridge Delivery Program.

Nathan McNeil
Research Associate, College of Urban & Public Affairs

Nathan McNeil's research has looked into Evaluating Efforts to Improve the Equity of Bike Share SystemsContextual Guidance at Intersections for Protected Bicycle Lanes and Bicycle and Pedestrian Traffic Monitoring Data Quality, among others. He also worked on the FTA Manual on Pedestrian and Bicycle Connections to Transit, published in 2017.

Christopher Monsere, Ph.D.  
Department Chair & Professor, Civil and Environmental Engineering

Associate professor of civil and environmental engineering, chair of Civil and Environmental Engineering at PSU, and nationally cited researcher into multimodal safety. Christopher Monsere's research efforts include Improving Walkability Through Control Strategies at Signalized IntersectionsImproving Adaptive Response Signal Control Performance, and Effective Design Treatments for Right-Turns at Intersections with Bicycle Traffic .

Kristin Tufte, Ph.D.
Research Assistant Professor, Department of Computer Science

Kristin Tufte is a transportation data management expert with expertise in the application areas of transportation and smart cities. Dr. Tufte has helped design and implement multiple research data management systems, including one system that was sold to NCR Corporation and most recently S-Store, a state-of-the-art data stream processing system developed with colleagues from MIT and Brown through the Intel Science and Technology Center - Big Data (ISTC-BD).

Avi Unnikrishnan, Ph.D.
Professor, Civil and Environmental Engineering

Associate professor of civil and environmental engineering and member of the Transportation Research Board (TRB) Network Modeling Committee, Traffic Flow Theory Committee, and the ASCE Intermodal and Logistics Committee. Avi Unnikrishnan has contributed to Stochastic and Dynamic Hyperpath Equilibrium Models, Preventing End of Queue Accidents, and the development of a transportation undergradute research fellowship, a program designed to equip engineering undergraduate students with critical thinking and research skills relevant to transportation engineering and planning with a livability theme.

Liming Wang, Ph.D. 
Associate Professor, Urban Studies and Planning

Assistant professor of urban studies and planning, data-driven researcher into land use and transportation planning, and developer of the Transportation Cost Index (TCI), a comprehensive performance measure for transportation and land use systems. Liming Wang has conducted research on Continuous Data Integration for Land Use and Transportation Planning and ModelingEvaluating and Enhancing Public Transit Systems for Operational Efficiency, Service Quality and Access Equity, and the development of a data science course, Introduction to Scientific Computing for Planners, Engineers, and Scientists.

Contact Us

Get in Touch

Email: asktrec@pdx.edu

Phone: 503-725-2896

Mailing Address:
P.O. Box 751
Portland, OR 97207 

Media Requests

Cait McCusker, Communications Director


Visit Us at Portland State University (PSU)

Our Office: Fourth Avenue Building at PSU 1900 SW Fourth Ave., Suite 175 

Nearby accommodations can be found here.