Cyclists riding toward a green bike signal
Principal Investigator: Sirisha Kothuri, Portland State University
Learn more about this research by viewing the Executive Summaries, related presentations, and the full Final Report on each Project Overview page.

Sirisha Kothuri, a Portland State University research associate, has recently completed two distinct studies taking different approaches to advancing bicycle safety. Kothuri will lead a Sept. 13 workshop on Bicycle/Pedestrian Focused Signal Timing Strategies along with Peter Koonce, the division manager of Signals & Street Lighting for the City of Portland. The half-day workshop will be part of Transportation and Communities 2018, a two-day...

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Principal Investigator: Nathan McNeil, Portland State University
Learn more about this research by viewing the Summary Report, related publications and the three Final Reports from each phase of the research on the Project Overview page. Hear firsthand from the researchers by watching the August 2017 webinar.

The third and final phase of our bike share equity research project has been published, with new findings from a survey of bike share users.

Riders targeted for equity-focused outreach efforts—lower-income individuals and people of color—were most likely to cite cost savings or discounted membership as reasons why they joined, while higher-income and white users were more likely to cite the convenience of using bike share. Lower-income riders were also more...

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Principal Investigator: Jennifer Dill, Portland State University
Learn more about this research by viewing related presentations and download the full manual on the Project Overview page. Hear firsthand from the researchers by tuning in for the webinar on December 4 (recording available post-webinar).

Prepared by TREC, the Federal Transit Administration (FTA) has just released a Manual on Pedestrian and Bicycle Connections to Transit.

TREC Director Jennifer Dill and TREC researcher Nathan McNeil worked with the FTA to develop the manual, a guidebook to creating a robust network for active transportation and transit users.

From defining "access sheds" to linking up transit and bike share, the newly published manual is a rich resource for planners and engineers looking to boost their city's bicycle and pedestrian transit access.

Dill and McNeil built the manual with a special...

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Psychology teaches us that implicit biases—attitudes we hold on a level below consciousness, and may not even be aware of—can have a heavy influence on split-second decisions.

In a fast-paced activity like driving, with a lot of moving parts in a complex environment, we make those snap decisions all the time. There are obvious safety implications to this, particularly for the most vulnerable road users. That’s why TREC researchers are becoming more and more interested in studying implicit bias and social psychology as it relates to transportation behavior.

The latest report from the NITC program, Exploring Drivers’ Attitudes and Behaviors toward Bicyclists: The Effect of Explicit and Implicit Attitudes on Self-Reported Safety Behaviors, is a dissertation by NITC fellow Tara Goddard.

With a focus on driver-cyclist interactions, Goddard dives into the social psychology of roadway interactions and comes up with some interesting takeaways for practitioners and researchers. Before moving to Portland in 2011 to begin her Ph.D., Goddard was the bicycle/pedestrian coordinator for the City of Davis, California, and says that it’s important to understand the mechanisms at...

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While it’s generally accepted that dense, mixed-use development promotes active travel, researchers don’t have a consensus on exactly how, and to what degree, land use determines people’s travel patterns.

NITC’s latest report, Active Travel Behavior and Spatial-Temporal Land Use Mixing, provides some clarity on the topic.

NITC fellow Steven Gehrke focused his dissertation research on transportation-land use interaction, and sees land use mix as a multidimensional construct.

“We can refocus—away from increasing density—and think more about how we configure land uses,” Gehrke said.

According to Gehrke’s research, more density does not necessarily equal more walking. Rather, the complementarity, composition, and configuration of land use types is essential for cultivating walkability.

Gehrke, who graduates this spring with a Ph.D. in civil and environmental engineering from Portland State University, conducted three empirical studies under his dissertation grant. The first focused on improving measurements of land use mix, introducing a land use mix measurement of the composition and configuration of local land use types.

The second study looked at other smart growth principles, like employment concentration and pedestrian-...

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Principal Investigator: Nathan McNeil
Learn more about this research by viewing the Summary Report, related publications and the full Final Report on the Project Overview page.

While bike-sharing systems become increasingly common in American cities, questions about the equity of such systems are making their way to the forefront of the conversation.

Bike share can provide a cheap and healthy means of transportation, but many systems are not serving the lower-income and minority populations who, arguably, could benefit most from having the additional travel option.

A survey of 56 bike share system operators in the United States offers an overview of how these equity concerns are being addressed.

The survey is part of a larger research effort, Evaluating Efforts to Improve the Equity of Bike Share Systems. To gain an understanding of the challenges and opportunities involved in providing more equitable bike share, TREC and NITC teamed up with the Better Bike Share Partnership: a collaboration between PeopleForBikes, the National Association of City Transportation Officials (NACTO), the...

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Everyday cycling for transportation can have positive, population-level health impacts. Significant deterrents to cycling remain, however, particularly for women and minorities.

Narratives of Marginalized Cyclists, a NITC project conducted by Amy Lubitow of Portland State University, explores the experiences of women and minorities biking in Portland, Oregon.

Lubitow interviewed 28 Portlanders who self-identified as a woman or as a racial/ethnic minority (or both), and based on the insights gained from their stories, came up with a set of recommended interventions for planners to mitigate the barriers they experience.

"Institutionalized racism and sexism is hard to fix. These are complicated issues that involve multiple levels of interventions, but at a basic sort of smaller scale, there are things we can do," Lubitow said.

She chose participants who own a bike and ride it at least once a month, but not more than once a week. The primary aim of the project was to collect rich, narrative data regarding obstacles to routine or utilitarian cycling for women and minorities who already see biking as a viable form of transportation, but who make relatively few bike trips.

The interviews yielded a...

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Principal Investigator: Christopher Monsere, Portland State University
Learn more about this research by viewing the final report and related publications on the Project Overview page.

The Federal Highway Administration issued an interim approval for bike signals, based on the NITC project "Operational Guidance for Bicycle-Specific Traffic Signals." The project, selected in 2015 as one of AASHTO's "Sweet Sixteen" high-value research projects, has been widely cited and the research is instrumental in beginning to standardize the use and design of bicycle signals.

This video provides a look at what that means for jurisdictions in the United States:

At the Transportation Research and Education Center (TREC), we are happy to spread knowledge of how to design bicycle-friendly cities. It’s why we offer two professional workshops every summer for engineers, planners and advocates through our Initiative for Bicycle and Pedestrian Innovation (IBPI) program.

It’s always exciting to see our workshop participants go back home newly empowered to bring vitality to their community’s bicycle networks. But the city of Moscow, Idaho has exceeded our wildest expectations.

Four of Moscow’s city employees have taken our course-- the mayor, the director of public works and two deputy directors -- and in a very short time they have managed to put Moscow on the map as a bicycle-friendly city: last spring they were awarded bronze status by the League of American Bicyclists.

Les MacDonald, P.E., is the director of public works for the city of Moscow.

He took the first course, Comprehensive Bikeway Design 1.0, in 2015 after hearing about it from a city engineer and an operations supervisor who had attended four years ago. He...

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Evaluation of Electric Bike Use at Three Kaiser Permanente NW Employment Centers in Portland Metro Region
John MacArthur, Portland State University; Jennifer Dill, Portland State University

Despite efforts to get more people biking, North America still has low ridership numbers. The problem? Biking is hard.

A new report by John MacArthur of Portland State University's Transportation Research and Education Center (TREC), funded by the National Institute for Transportation and Communtiies, offers a solution to that problem: e-bikes. 

Many people surveyed say that having to pedal up hills and arriving at their destination sweaty are major deterrents to commuting by bike, even when bike lanes and other facilities are there.

Researchers have put a lot of thought into ways to get more people riding bicycles by improving bicycle infrastructure, land use and public engagement. The efforts are largely due to concerns about congestion, climate change and public health. Comparatively little research, however, has focused on the bicycle itself.

MacArthur and co-investigator...

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