Portland State University

Transportation networks are a vital lifeline essential to the functionality of modern society. A newly published research report offers a new methodology for assessing transportation network vulnerability and resilience, with a particular focus on incorporating social vulnerability into the analysis.

Why? Vulnerable populations—such as people with low income, minorities, or seniors—could suffer higher levels of adverse impacts from disruptions. Road closures and other transportation network interruptions due to earthquakes, floods or other disasters may disproportionately affect these groups of people.

The research project, "Integrate Socioeconomic Vulnerability for Resilient Transportation Infrastructure Planning," by Liming Wang, John MacArthur, and Yu Xiao of Portland State University (PSU), addresses a critical gap by integrating socioeconomic vulnerability indicators into the evaluation of transportation infrastructure vulnerabilities.

The report demonstrates this novel methodology using the Portland, Oregon metropolitan area as a case study.

WHAT DOES THE METHODOLOGY OFFER?

The new methodology proposed by the research team combines spatial analysis, network modeling, and social vulnerability indices to identify critical links in the transportation system. It assesses the impact of potential disruptions on accessibility to...

Since 2011, Portland State University and the Initiative for Bicycle and Pedestrian Innovation have offered a unique opportunity to students: a two-week study abroad course that introduces participants to cities with stellar bike cultures. In past years, classes have explored the Netherlands, Sweden, and Denmark. This year’s class of eight students, led by Hau Hagedorn and Drusilla van Hengel, spent two weeks this summer traversing Denmark by public transportation, foot, and (of course) bike. Check out some photos from the trip.

Students came from all over the country—from Portland to Connecticut—to attend the course. What they all had in common was a desire to learn from a city that is renowned to have some of the best bike infrastructure in the world. The students wanted to bring their newfound knowledge back to their respective towns to make the world a safer, happier place for their loved ones and communities.

Ern Tan—the founder of Civic Cincinnati, a grassroots urbanism advocacy group in Ohio—said before the trip that she was looking forward to seeing the promise of a more bikeable future for Cincinnati reflected in...

When Kyu Ri Kim was seven years old, she was struck by a car while walking in her neighborhood where there was no separate walkway for pedestrians in Seoul, South Korea.

Kim, who is now an adjunct research associate at Portland State University (PSU), received nerve damage in her legs and had to use a wheelchair for several days after the incident. This experience launched her interest in pedestrian safety, which eventually led to her 2024 doctoral dissertation research project: "The Central Role of Perceived Safety in Connecting Crash Risk Factors and Walking Behavior."

"That was the real starting point, my personal experience. And I'm curious whether other people really do understand the real risk around them. What are the crash risk factors around them and how are they different from individual perceived risk?" Kim said.

Her dissertation, supported by funding from the National Institute for Transportation and Communities (NITC), illuminates the relationship between pedestrian crash risk factors and perceived safety, as well as the relationship between safety attitudes and walking behavior. How the interplay between these factors influences people's behavior...

This year, residents of 37 new apartment buildings in the Portland area are receiving surveys in the mail. The reason? Portland State University researchers are requesting information about how they travel.

Knowing how residents of these high-density affordable and mixed-income housing developments get around town is key to guiding future development in the metropolitan area.

Metro—the regional government of the Portland, Oregon area—strategically invests in transit-oriented development, or TOD, to help more people live in neighborhoods served by high-quality transit. In a partnership going back nearly twenty years, PSU has supported the Metro TOD program by collecting data on residents' travel habits. This latest round of surveys will add to a knowledge base that has been useful for both Metro and PSU, for several reasons.

WHY COLLECT TRAVEL DATA FROM TOD RESIDENTS? 

Using this information, Metro can refine its TOD funding program model to ensure that future developments achieve intended outcomes. 

Patrick McLaughlin, senior development project manager for housing and transit-oriented development at Metro, joined the TOD project in April 2016. Part of his job is to assign gap funding to affordable housing projects...