Friday Transportation Seminar: Transportation and Gentrification: Impacts on Low-income Black Households in Portland

Friday, May 7, 2021, 11:30am to 12:30pm PDT

We are committed to making decisions that promote the success and well-being of our campus community. Until further notice, all live events hosted by TREC will be online only.

Friday Transportation Seminars at Portland State University have been a tradition since 2000. You can join us online at 11:30 AM.


Portland’s Black population has been heavily impacted by gentrification in the historic Albina community. Nearly half of Portland’s Black population lives in the area east of 82nd Ave, known as East Portland. This has had substantial impacts on both Black households that can continue living in Albina and those living in East Portland. The suburban-esque built environment of East Portland makes it difficult to get around and reach basic necessities. Those living in Albina have taken on exorbitant rents. Both groups suffer from a geographic divide that has made it difficult to rely on family and friends for basic needs like childcare and...

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Webinar: Eliminating Cash Options for Public Transit Fares: Costs, Benefits and Equity Impacts

Tuesday, May 11, 2021, 10:00am to 11:00am PDT


Many transit agencies plan to automate their fare collection and limit the use of cash, with the goals of improving boarding and data collection while lowering operating costs. Yet about 10% of adults in the United States lack a bank account or credit card, and many either rely on restrictive cell-phone data plans or don’t have access to internet or a smartphone. 

This webinar will present part of a larger research project exploring these issues in the cities of Denver, Colorado, and Eugene and Portland–Gresham, Oregon. In this part, we explore the tradeoffs between reducing cash acceptance, ridership and the costs of fare collection systems. How much does it save to reduce cash acceptance, verses ridership and equity impacts?

We will also present a cost-effectiveness framework that combines a qualitative and quantitative analysis and use this model to explore case scenarios in our three cities. The model shows that adding a retail network to facilitate fare payment as well as preserving cash acceptance on board buses through the farebox are highly effective solutions. The model is customizable for any agency and similar analyses can be run for different configurations of fare collection systems.


  • The extent and dimensions of digital and...
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Webinar: Electric Bus Deployment: Cost and Environmental Equity

Tuesday, June 8, 2021, 10:00am to 11:00am PDT


This presentation introduces an innovative spatiotemporal analytical framework and web-based visualization platform developed by researchers at the University of Utah to assist transit agencies in identifying optimal deployment strategies for a battery-electric bus (BEB) system by using a combination of mathematical programming methods, GIS-based analysis, and multi-objective optimization techniques. The framework allows transit agencies to optimally phase in BEB infrastructure and deploy the BEB system in a way that can minimize the capital and operational cost of the BEB system while maximizing its environmental benefits (i.e., emission reduction).


  • Introduction to a bi-objective spatiotemporal optimization model for the strategic deployment of BEBs to minimize the cost of purchasing BEBs, on-route and in-depot charging stations, and to maximize environmental equity for disadvantaged populations.
  • The optimization considers the unique constraints imposed by BEB operations in a spatiotemporal fashion.
  • We used empirical data to offer a potential framework that can be adopted or expanded by transit agencies to optimally deploy BEBs by accommodating multiple goals and objectives that the transit agencies set forth.
  • The research could help transit agencies develop optimal deployment...
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Webinar: The Impact of Ride Hail Services on the Accessibility of Nonprofit Services

Tuesday, July 13, 2021, 10:00am to 11:00am PDT


Nonprofit organizations are responsible for providing human services across the United States, often in partnership with government agencies. In this work, they address some of the most pressing social issues – including homelessness, poverty, health care and education. While many of these organizations consider location and accessibility crucial to supporting their clients – often locating services near bus or train stops, for example – little is known about the impact of new technologies, including ride hail services (also called Transportation Network Companies, or TNCs) like Lyft and Uber, on nonprofit accessibility.   

Do these services help fill gaps in client needs? How are nonprofit organizations considering these services in meeting client needs?

This exploratory and qualitative study is among the first of its kind to measure the impact of TNCs and other emerging technologies on community mobility and the accessibility of human services, helping to build stronger communities. This study includes interviews with nonprofit service providers and clients in Seattle to explore the ways nonprofit leaders and organizations are using TNCS, and the impact on their clients.


  • Nonprofit human services organizations use transportation network companies like Uber and Lyft to support client mobility, but that use is modest and uneven across organizations.
  • ...
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