Portland State University researchers Martin Swobodzinski and Amy Parker, with student co-authors Julie Wright, Kyrsten Hansen and Becky Morton, have published a new article in Frontiers in Education: "Seamless Wayfinding by a Deafblind Adult on an Urban College Campus: A Case Study on Wayfinding Performance, Information Preferences, and Technology Requirements."

The article reports on an empirical evaluation of the experience, performance, and perception of a deafblind adult participant in an experimental case study on pedestrian travel in an urban environment. The case study assessed the degree of seamlessness of the wayfinding experience pertaining to routes that traverse both indoor and outdoor spaces under different modalities of technology-aided pedestrian travel. Specifically, an adult deafblind pedestrian traveler completed three indoor/outdoor routes on an urban college campus using three supplemental wayfinding support tools: a mobile application, written directions, and a tactile map.

Results indicate that wayfinding performance and confidence differed considerably between the three wayfinding support tools. The tactile map afforded the most successful wayfinding and highest confidence. Wayfinding performance and confidence were lowest for the mobile application modality.

The simplicity of use of a wayfinding tool is paramount for reducing cognitive load during wayfinding. In addition, information that does not match individual, user-specific information preferences and needs inhibits wayfinding performance. A substantial engagement of the deafblind community in both research and development is critical for achieving universal and equitable usability of mobile wayfinding technology.

Parker and Swobodzinski have partnered on two previous projects funded by the National Institute for Transportation and Communities (NITC), and this paper builds on findings from their research. The first project, A Comprehensive Examination of Electronic Wayfinding Technology for Visually Impaired Travelers in an Urban Environment, was completed in 2019 and provided an overview of existing mobile wayfinding technology as well as insights from focus groups with users. The second, Seamless Wayfinding by Individuals with Functional Disability in Indoor and Outdoor Spaces: An Investigation into Lived Experiences, Data Needs, and Technology Requirements, is in progress now.

Photo by Halfpoint/iStock

The Transportation Research and Education Center (TREC) at Portland State University is home to the National Institute for Transportation and Communities (NITC), the Initiative for Bicycle and Pedestrian Innovation (IBPI), and other transportation programs. TREC produces research and tools for transportation decision makers, develops K-12 curriculum to expand the diversity and capacity of the workforce, and engages students and professionals through education.

A new study launches next month, funded by the National Institute for Transportation and Communities (NITC). Researchers at Portland State University and the University of Texas at Arlington will explore the use of crowdsourced data to estimate pedestrian counts. The project team consists of Sirisha Kothuri and Nathan McNeil of Portland State University, and Kate Hyun and Stephen Mattingly of the University of Texas at Arlington. 

WHAT ARE PEDESTRIAN COUNTS USED FOR?

"You know that saying that if you can't measure it, you can't change it? For most streets, we might have some intuitive sense of if there are a lot of people walking there or not, but we rarely have data to back it. This project will assess how crowdsourced data can help to establish the level of pedestrian activity on streets throughout the transportation network," McNeil said.

Knowing how many pedestrians or bicyclists are using a link or a network is the foundation for measuring nonmotorized travel. Count data are useful for monitoring trends, planning new infrastructure, and for conducting safety, health, and economic analyses. The lack of widely available pedestrian count data precludes meaningful safety studies, which have become critically important, especially with the nationwide increase in pedestrian crashes over the last decade.

Several automated technologies have been developed to count bicyclists and pedestrians. Many advances in counting technology are more efficient than the old person-with-clipboard method, but cost and other considerations still limit direct observation to small subsets of entire networks. However, the emergence of crowdsourced data such as Strava and StreetLight has allowed for the collection of large-scale datasets over broad areas of the network. 

WHAT WILL BE STUDIED

While several research studies have evaluated and applied bicycle data from these datasets, no study has yet looked at pedestrian count estimates from these data sources or assessed how these compare to traditional pedestrian counts and other measures of pedestrian activity, such as pedestrian actuations from traffic signals. The researchers will evaluate pedestrian data estimates from the crowdsourced data sets and explore how these can be used along with traditional count data and sociodemographic data to derive count estimates.

"The lack of pedestrian counts limits our ability to conduct safety analyses, estimate changes in demand, determine where infrastructure improvements need to be made, and quantify the benefits of walking. We hope that the findings from the study can help agencies estimate pedestrian counts on their network and use them for a variety of applications," Kothuri said.

This project is one seven new research efforts funded by the latest General Research grant from NITC. Read about the other six projects here.

ABOUT THE PROJECT

Exploring the Use of Crowdsourced Data Sources for Pedestrian Count Estimations

Sirisha Kothuri and Nathan McNeil, Portland State University; Kate Hyun and Stephen Mattingly, University of Texas at Arlington

Photo by Dmytro Varavin/iStock

The Transportation Research and Education Center (TREC) at Portland State University is home to the National Institute for Transportation and Communities (NITC), the Initiative for Bicycle and Pedestrian Innovation (IBPI), and other transportation programs. TREC produces research and tools for transportation decision makers, develops K-12 curriculum to expand the diversity and capacity of the workforce, and engages students and professionals through education.

The 2021 World Symposium on Transport and Land Use Research was held virtually August–11, and three recorded sessions are available to watch. See below for links to the opening and closing keynote speeches and a panel discussion on Portland, Oregon's urban growth boundary. TREC co-sponsored the conference with The World Society for Transport and Land Use Research (WSTLUR). Portland State University's interim Associate Vice President for Research, Kelly Clifton, and TREC director Jennifer Dill co-hosted the event along with Yingling Fan of the University of Minnesota. Check out the recordings here:

The first WSTLUR symposium was held in Whistler, Canada 2011; the second was held in Delft, The Netherlands in 2014; and the third took place in Brisbane, Australia in 2017. This year's virtual conference was based out of Portland, Oregon and featured over 100 papers, with authors from 30 different countries around the globe.

The World Society for Transport and Land Use Research is the group that organizes the symposia and fulfills other aims of the Society. Its purpose as a society is to promote the interdisciplinary understanding of interactions between transport and land use and to provide a forum for debate and a mechanism for dissemination of research, while encouraging diverse viewpoints and backgrounds in our membership and activities.

The Transportation Research and Education Center (TREC) at Portland State University is home to the National Institute for Transportation and Communities (NITC), the Initiative for Bicycle and Pedestrian Innovation (IBPI), and other transportation programs. TREC produces research and tools for transportation decision makers, develops K-12 curriculum to expand the diversity and capacity of the workforce, and engages students and professionals through education.

If you could securely pick up your packages on your commute by public transit, from any carrier—be it USPS, FedEx, UPS or other companies, would you? Transit agencies could be missing a potential strategy to increase ridership by offering common carrier parcel lockers at transit facilities. 

Mitigating the demands on our urban transportation networks by consolidating parcel deliveries at high trafficked transit facilities could also benefit retailers, logistics and carrier companies, and consumers. But how do we ensure the equitable distribution of these sites for disadvantaged populations, while keeping accessibility in mind?

Using real world data from the Portland, OR region, a new study from researchers at Portland State University (PSU) offers a multiple-criteria approach using accessibility and equity metrics, including ridership, mode of transportation, spatial distribution, and sociodemographic profiles of coverage areas. 

Limited Free Access: The article in Transportation Research Record, "Accessibility and Equity Analysis of Transit Facility Sites for Common Carrier Parcel Lockers," by Katherine Keeling, Jaclyn Schaefer and Miguel Figliozzi, will be free to access for two months.

“There are multiple types of transit facilities that could work well as host sites for parcel lockers, but the accessibility and equity tradeoffs are complex,” shared Miguel Figliozzi, PSU engineering professor. “Transportation practitioners and policymakers have a lot to consider when prioritizing locations.”

Who could benefit from a common carrier parcel locker at transit facilities?

A lot of people stand to benefit from implementing common carrier parcel lockers at transit facilities: consumers, transit users, logistics and shipping companies, and the retailers.

If offered as a one-stop location for packages from different couriers, consumers could have the convenience of picking up multiple packages while getting on or off public transit. This is easily integrated into trip chaining–including spots near their home, workplace, or frequent errands. An added benefit is that an automatic/unmanned parcel locker system can offer 24-hour operations and more security than a porch drop-off.

Fragmentation and inefficient routing in delivery drives up the cost of last-mile logistics, especially to residential areas. Sometimes, older multi-unit complexes lack adequate space for receiving packages. Consolidation of multiple deliveries to one locker offers efficiencies of scale for delivery operations. Being less energy and time intensive, this could both lower carbon emissions and labor costs.

More efficient shipping options can reduce the costs that retailers absorb when they promote “free” shipping. Secure parcel lockers can also prevent profit losses due to order replacements or refunds to cover stolen packages.

Where do people ride transit, and is it accessible?

The ridership evaluation identified transit facilities with high levels of potential locker users. Researchers looked at a wide variety of transit facilities in Portland, OR–including: bus stops, light rail stops, bus + rail stops, transit center (bus only), transit center (bus + rail), park-and-rides (PaR), transit center + park-and-rides, and transit mall segments. 

Ultimately, the case study indicated that most of the high-ridership transit facilities are within the city center, where PaR facilities are absent. In fact, over half of the 20 highest ridership locations are segments of the downtown transit mall.

The accessibility by mode was extended not only to study equity issues but also because most research on transit-oriented lockers assumes that the catchment area for transit riders is constrained by the distance they are willing to walk with a parcel. However, transit riders that drive their personal vehicle to PaR facilities will not be inhibited by ‘‘willing to walk’’ estimates, and similarly, those who access transit via bicycle are not best represented by ‘‘willing to walk’’ estimates.

Keeping in mind the geometric design of the transit facility, consideration should be given to a loading/unloading zone that could accommodate heavy freight vehicles without interfering with transit activities. Turning radii and sight lines need to be safe for these delivery vehicles. Accessible design is also important for people with mobility impairments and/or and wheelchair users in the facility.

What method was used to determine equitable distribution of the parcel lockers?

“Immediately prior to this work, I had co-written a paper looking at the equity and environmental justice policy implications in home deliveries,” shared Figliozzi. “Disadvantaged groups are less likely to adopt home deliveries, and there are apparent barriers. That got me interested in considering how locating parcel lockers at transit facilities could potentially overcome some of those barriers.”

Some of the equity metrics they looked at included mode of transportation, population, where employers are located, and other key socioeconomic aspects (income, race, education level, and internet access). This was then compared among the twenty highest ridership transit facilities. 

The study demonstrated that there are complex tradeoffs between spatial coverage, type of facility, and equity metrics. There will always be budget constraints, and outside the scope of this research they must be considered alongside the design (and limitations) of the sites when looking at real-world implementation of lockers.

Implementing pilots at transit malls and suburban park-and-rides

Based on the data collected, a common carrier parcel locker system could take advantage of the high number of riders and foot traffic at the transit malls. It offers consolidated parcel collection points at the densest area of the city’s employment and transit networks. Another good option is at suburban PaR facilities which improves spatial equity and coverage, but also has the potential to serve a much greater population given the accessibility to drivers.

If cities and transit agencies are proactive in attracting public-private partnerships with delivery companies, a common carrier locker system could start with a pilot. Implementing a small number of locations and applying an equity-first approach would offer incremental growth of the program that is cost efficient, reaches a large population, and also covers areas serving disadvantaged populations.

Questions remain around how to best design accessible locker sites, and how to plan for the safety of parcel carriers and consumers. “Looking beyond the convenience of these parcel lockers, they should be considered when talking about the evolution of equitable transit-oriented development,” said Figliozzi. “This is one tool we could use in reducing the environmental impact of the last mile in freight delivery.”

About the Research

This article, “Accessibility and Equity Analysis of Transit Facility Sites for Common Carrier Parcel Lockers”, by Katherine Keeling, Jaclyn Schaefer, and Miguel A. Figliozzi and published in Transportation Research Record (TRR), will be free to access for a limited time.

Photo courtesy of TriMet

The research is funded by the Freight Mobility Research Institute––a U.S. DOT university transportation center. 

The Freight Mobility Research Institute (FMRI), housed in the Department of Civil, Environmental and Geomatics Engineering within FAU’s College of Engineering and Computer Science consists of a consortium of experts from universities across the nation with expertise in freight transportation, network modeling, sustainability, and intelligent transportation systems. http://eng.fau.edu/ 

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We're proud to announce that Dr. Sirisha Kothuri, Senior Research Associate at Portland State University, has been awarded the 2021 Research Professional of the Year award by the Association of Pedestrian and Bicycle Professionals (APBP). The APBP Professional of the Year Awards recognize the achievements of pedestrian and bicycle professionals made in the last twelve months in the private, public, research, and nonprofit sectors.

Dr. Kothuri’s contributions to advance the state of practice in bicycle and pedestrian safety research are outstanding. She has worked to inspire the next generation in our field and advance the professional knowledge of others through research around multimodal traffic operations, bicycle and pedestrian counting, and safety, with an emphasis in innovation in non-motorized transport.

The Transportation Research and Education Center (TREC) at Portland State University is home to the National Institute for Transportation and Communities (NITC), the Initiative for Bicycle and Pedestrian Innovation (IBPI), and other transportation programs. TREC produces research and tools for transportation decision makers, develops K-12 curriculum to expand the diversity and capacity of the workforce, and engages students and professionals through education.

"Transformative Transportation Survey Methods: Enhancing Household Transportation Survey Methods for Hard-To-Reach Populations," is a new article published in the September 2021 issue of Transportation Research Part D. It was co-authored by Amy Lubitow, a sociology faculty member at Portland State University, Erika Carpenter, a sociology graduate student, and Julius McGee, a faculty member in urban studies and planning.

The study explores the challenges that hard-to-reach populations face in completing household activity surveys. Researchers drew on qualitative data from hard-to-reach populations regarding the limits of the Oregon Household Activity Survey and found evidence that the survey methods lack social, cultural, and linguistic applicability for Black, Indigenous and other people of color, as well as low-income populations. The authors argue that Oregon’s household travel survey prioritizes certain ways of understanding and experiencing mobility that are, by default, exclusionary. The article concludes in sharing insights regarding how transportation professionals might improve data collection efforts. Broader efforts for transportation equity (and ultimately towards transportation justice) cannot be achieved when the data used to inform transportation planning fails to accurately reflect all populations.

The paper draws on findings from a NITC research project led by Lubitow: Advancing Transportation Equity through Inclusive Travel Survey Data Methods

Photo by santypan/iStock

The National Institute for Transportation and Communities (NITC) is one of seven U.S. Department of Transportation national university transportation centers. NITC is a program of the Transportation Research and Education Center (TREC) at Portland State University. This PSU-led research partnership also includes the Oregon Institute of Technology, University of Arizona, University of Oregon, University of Texas at Arlington and University of Utah. We pursue our theme — improving mobility of people and goods to build strong communities — through research, education and technology transfer.

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How can we use a variety of data-driven speed management strategies to make transportation safer and more efficient for all modes–whether you’re driving, walking or taking transit?

The project was led by Yao Jan Wu, director of the Smart Transportation Lab at the University of Arizona. Co-investigators were Xianfeng Terry Yang of the University of Utah, who researches traffic operations and modeling along with connected automated vehicles, and Sirisha Kothuri of Portland State University, whose research has focused on improving signal timing to better serve pedestrians. Join them on Sept 15, 2021 for a free webinar to learn more.

"We want to improve mobility for all users, be it pedestrians, vehicle drivers or transit riders, and there are different strategies to do this. How do we harness data to drive us to these strategies?" Kothuri said.

Funded by the National Institute for Transportation and Communities (NITC), this multi-university collaboration addressed the question from three angles:

  • Wu and his students in Arizona looked at the impact of speed management strategies on conventional roadways.
  • Yang and his team examined the effects of speed management strategies on connected corridors, coordinating with transit signal priority (TSP) systems.
  • Kothuri and her PSU team came up with an approach to estimate pedestrian delay at signalized intersections.

The aim of their combined research efforts was to investigate the possibility of developing and implementing more innovative speed management strategies that are effective for multimodal transportation and can be applied in both conventional roadways and "connected" roadways - i.e. equipped with vehicle-to-infrastructure or infrastructure-to-infrastructure communication capabilities.

IMPACT OF SPEED FEEDBACK SIGNS ON TRAFFIC FLOW AND SAFETY

Working with Pima County, Arizona, Wu and the Arizona research team evaluated the mobility and safety impacts of speed feedback signs on conventional roadways. Ina Road, a major signalized arterial in Tucson, was selected as the study corridor. This corridor was chosen because of the existing speed feedback signs along the corridor between signalized intersections, and due to the presence of advanced traffic data collection systems. Traffic data were collected for four weeks (May 28-June 25, 2018), and the existing signs were disabled for two weeks (June 11th-June 25th) during the data collection.

Using MioVision’s TrafficLink platform and high-resolution data, the researchers measured:

  • Percentage arrival on red: The percentage of vehicles that arrived at the intersection when the signal was red.
  • Split failure: The occurrence of leftover demand (when at least one vehicle in the queue was not able to go, but had to wait for the next green cycle) for a specific approach at an intersection.
  • Intersection delay: Total amount of time that all vehicles spend in the intersection queue while waiting to pass the intersection.

For a given time of day before and after disabling the speed feedback signs, only a little variation in traffic flow was observed. Similar traffic flow peaks for all the segments suggest that arterial mobility and traffic flow were not affected by disabling the signs. But what about the signs' effect on safety?

Data from the Pima Association of Governments show that the total number of severe crashes (four) on the study corridor all occurred before implementing the speed feedback signs in 2015. Moreover, using speed as a performance indicator, the researchers found a reduction in drivers' speeds along each link of the corridor, in between intersections (see page 21 of the final report for a table of speed results on weekdays and weekends). The reduction in the link speed was significant during the times the feedback signs were enabled, suggesting a reduced likelihood of severe crashes.

RETIMING SIGNALS FOR TRANSIT SIGNAL PRIORITY

Yang and the Utah team explored the impact of a speed management strategy on a connected corridor in Salt Lake City, Utah: how does signal retiming impact a transit signal priority (TSP) system?

Although TSP is a promising way to reduce bus delays at intersections, improve transit operational reliability, and consequently increase transit ridership with improved service, the effectiveness of TSP is subject to things like bus schedule, signal timing plan, passenger flows, etc. Considering this, the Utah Department of Transportation (UDOT) adopted a speed management strategy – signal coordination and retiming –  to improve the effectiveness of TSP. UDOT implemented signal coordination along a stretch of Redwood Road, a connected corridor with dedicated short-range communication, and applied several signal timing plans with the aim of maximizing the benefits of TSP. 

In general, researchers found, the average rate of TSP served before signal retiming was 33.13%, which is lower than that of 35.29% after signal retiming. This means that more buses requesting signal priority had their requests met, after the signals were retimed. In other words, the speed management strategies were also helping to improve bus reliability. 

In addition, bus travel time and bus running time were reduced after signal retiming. All of these findings indicate that the speed management strategy implemented along this connected vehicle corridor results in an improvement of TSP and bus service.

ESTIMATING PEDESTRIAN DELAY

There is technology, like signal controllers that can record high-resolution data, capable of recording pedestrian delay; but not every intersection is equipped with this technology because it is costly. Agencies are upgrading their infrastructure when possible, but there are still a lot of intersections where there is no means of knowing how long of a delay a pedestrian may experience. 

The PSU team, led by Kothuri, developed an alternative method for estimating pedestrian delay by using controller data for estimating multimodal signal performance measures.

Traditionally, signal timing is calibrated to prioritize vehicle movement, and long delays for pedestrians can increase noncompliance, causing unnecessary risk. So the team's goal was to find a way to use data to estimate what the pedestrian delay would be, at intersections that are not equipped with the latest infrastructure. Researchers took data from Ina Road, the same study corridor in Pima County, Arizona used to evaluate speed management strategies, and used finite mixture modeling to model pedestrian delay. Results showed that their method was able to successfully model the delay fluctuations with less than 10% mean absolute error. This method can be applied to intersections with similar characteristics as the test intersections. So cities and agencies that do not have signal controllers to capture pedestrian delay can use this finite mixture modeling method to figure out where they need to apply strategies to reduce that delay. 

The application of the proposed method could be beneficial to transportation agencies in three capacities:

  1. providing a more reliable, robust, and accurate approach for estimating pedestrian delay at signalized intersections where sensors are not available to collect pedestrian delay;
  2. a tool for analyzing the risk of pedestrians violating the signal;
  3. calibrating a network-wide model for estimating pedestrian delay at all intersections without the need to use additional resources

OUTCOMES OF THE RESEARCH

An effective strategy for improving mobility needed to consider both motorized and non-motorized modes of transportation. The three main achievements of this project were:

  1. Evaluate the impact of speed management strategies along conventional arterials using smart sensor data;
  2. Understand the role of conventional speed management strategies in supporting connected arterials;
  3. Examine the possibility of using controller event-based data to estimate multimodal signal performance measures.

Improved multimodal speed management strategies foster a safer community that will, in turn, encourage more people to walk and bike. This project addressed data-driven multimodal speed management strategies for traditional corridors using traffic sensors, and for future evaluation of connected vehicle-based strategies. The project also strengthened relationships between the three universities and their local partners, including Pima County and the Utah DOT.

"This project highlighted the strong collaboration we have among the universities. Trying to find innovative solutions during the process tied our universities together, bringing local resources together as well," Wu said.

ABOUT THE PROJECT

Data-Driven Mobility Strategies for Multimodal Transportation

Yao-Jan Wu, University of Arizona; Xianfeng Yang, University of Utah; Sirisha Kothuri, Portland State University

This research was funded by the National Institute for Transportation and Communities, with additional support from Pima County Public Works Administration, Portland State University, University of Arizona, University of Utah, and Utah Department of Transportation.

RELATED RESEARCH

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Photo by csfotoimages/iStock

The National Institute for Transportation and Communities (NITC) is one of seven U.S. Department of Transportation national university transportation centers. NITC is a program of the Transportation Research and Education Center (TREC) at Portland State University. This PSU-led research partnership also includes the Oregon Institute of Technology, University of Arizona, University of Oregon, University of Texas at Arlington and University of Utah. We pursue our theme — improving mobility of people and goods to build strong communities — through research, education and technology transfer.

Interested in active transportation research? What’s been done? What should be done? 

We’re excited to share the release of the Research Roadmap for the American Association of State Highway and Transportation Officials (AASHTO) Council on Active Transportation (CAT). The Roadmap was created to foster research that will address important active transportation needs at the state DOT level and beyond. 

Funded by the National Cooperative Highway Research Program (NCHRP), a team of researchers from the Transportation Research and Education Center (TREC) at Portland State University (PSU) and Toole Design prepared the Research Roadmap over the past 18 months. They reviewed existing and on-going active transportation research, identified key research needs from a wide range of sources, and held outreach activities with practitioners to refine and prioritize those needs.

The project offers guidance on where active transportation research has been, and where it should go next in developing speed management strategies to improve pedestrian and bicyclist safety on arterial roadways, determining context-driven optimal spacing between marked crosswalks, addressing racial and economic disparities in safety improvements, refining guidance on bicycle signal timing, overcoming barriers to implementing active transportation in planning and engineering practice, and many more research questions:

  • The Research Roadmap provides an introduction and description of the process and methods used to develop the Roadmap. Most importantly, it includes a set of 110 research needs that are grouped into four levels of priority, as well assigned one of six primary topical areas: Data; Design; Equity and Accessibility; Planning; Policy and Practice; Safety; or Technology and Micromobility.
  • The Research Review summarizes the existing and ongoing research on 22 topics. These summaries informed the Research Roadmap, and for each topic it dives into what we already know; how research is being done; current research underway; existing reviews; TRID index terms; and other relevant insights.
  • A February 2, 2022 Webinar provides an overview of the Research Roadmap.

The team also prepared a Continuity and Implementation Plan for the AASHTO CAT, along with a tracking tool. The NCHRP 20-123(02) project page includes more detailed information.

The PSU team was led by Jennifer Dill, and included Nathan McNeil, Christopher Monsere, Sirisha Kothuri, and John MacArthur. PSU graduate students Ana Navia Peláez and Kyuri Kim assisted with the Research Review. Stefanie Brodie led the team from Toole Design, which included Jessica Schoner, Jeremy Chrzan, James Elliot, Christina Fink, Talia Jacobson, Belinda Judelman, and Frank Proulx. Jacobson and Judelman are alums of the PSU Masters of Urban and Regional Planning (MURP) program. 

Photo by Cait McCusker

The Transportation Research and Education Center (TREC) at Portland State University is home to the National Institute for Transportation and Communities (NITC), the Initiative for Bicycle and Pedestrian Innovation (IBPI), and other transportation programs. TREC produces research and tools for transportation decision makers, develops K-12 curriculum to expand the diversity and capacity of the workforce, and engages students and professionals through education.

Last year, a car driver hit a César Chávez K-8 School student at the intersection of N. Portsmouth Ave and N. Willis Blvd in Portland, OR. It underscored what parents, teachers and Portland community members have been demanding for many years: increased investment in traffic safety at schools during pick up and drop off hours.

What’s more: Portsmouth’s residents already had a lot of ideas of how to improve pedestrian safety at this intersection.

Seeking to help the community take action on these ideas, Safe Routes to School advocacy professionals William Francis and Hanna Howsmon at Community Cycling Center and César Chávez teacher Sam Balto recommended this intersection as a potential quick build project for the Better Block PSU pathway program-–a partnership between the volunteer-led group Better Block PDX and the Transportation Research and Education Center (TREC) at Portland State University that pairs transportation students with community-led projects. 

“PSU students support community members with the technical aspects of infrastructure improvements–elevating and materializing their ideas by developing plans, designs, and engineering concepts. It’s a shift from the status quo with a ground-up approach, and their transportation expertise can help community members in navigating the permit process or proposing informed solutions to the city,” shared Hau Hagedorn, TREC Associate Director and Better Block PSU program lead.

Project partner William Francis added, “Community members were plugged into a process that we should not expect them to carry out solely on their own. Strong community-led work requires a mindset in which planners and engineers are looking for ways to say "yes" to community ideas as opposed to reaching for reasons to say "no".”

After undergoing development with PSU’s Urban Planning students in the Fall of 2020, this project was chosen to move onto the second phase with the Spring 2021 PSU Civil Engineering course. The team of thirteen civil engineering students was led by soon-to-be graduate Raymond Poss (now a WSDOT technician). 

“We were given a blank slate to work with, and pushed outside of our comfort zone by Instructor Evan Kristof– but he was always there to bail us out if we went too deep. Unique to this engineering class, we had to learn public speaking skills working with clients and accept that not every solution fits perfectly into a box,” shared Raymond. “We experienced a lot of growth in pitching ideas, making mistakes, and supporting one another in finding solutions. Recognizing and learning to accept the limitations of real-world transportation challenges felt good in the end, and it increased our capacity to work holistically with our counterparts in planning wherever we go next.”

Pooling their collective cultural and technical knowledge, the PSU civil engineering students designed an online survey in three languages: English, Spanish, and Arabic. With the invaluable support of the Community Cycling Center, they bridged the digital divide by handing out printed half-sheet surveys through the CCC’s weekly food-delivery-by-bike program.

The residents of Portsmouth had a lot to say about what was needed to improve pedestrian safety at that intersection, and some had a clear idea of how to get it done:

  • Portsmouth in general feels very unsafe. I avoid it at all costs, on bike or in a car. The area needs more refuge islands like was done on Saint Louis Ave in St Johns.
  • I’ve seen multiple accidents at this intersection due to irresponsible driving. If people aren’t present, cars often don’t even stop, especially in the late evening.
  • Muchos no respetan las señales de alto. [Many do not respect the stop signs.]
  • A stop light or crosswalk light would be so valuable here. I have kids that walk to school everyday - and I would love to be able to send them on their own, but as of now I don't trust the drivers on Willis/Portsmouth to see them or stop for them.
  • A raised table across the intersection or raised crosswalks for all 4 crossings.
     
  • Cars heading North on Portsmouth make the right hand turn (Eastbound) on Willis try to make a turn lane around the cars that are stopped to go straight (Northbound). This is particularly dangerous when I am making the same Eastward turn on my bike (I head south on Portsmouth and turn left). They are already into their turn before they see me in the intersection. Most of them have not stopped when they have gone around the Northbound car that is stopped.

Guided by PSU engineering professor Evan Kristof and community feedback, the civil engineering students assessed the site conditions and project data to develop four pop-up alternatives along with a scoring criteria (download the full Better Block PSU presentation - PDF).

  1. Pop-Up Alternative - Mini-Roundabout: To slow down drivers by obstructing their path in order to ensure pedestrian safety.
  2. Pop-Up Alternative - Bump-outs: To slow down drivers by reducing road width in order to ensure pedestrian safety.
  3. Pop-Up Alternative - Raised Crosswalk: Acts like a speed bump to slow down traffic and provide a safer pedestrian crossing medium.
  4. Pop-Up Alternative - No Build: Maintain the current state of the intersection. (provides baseline)

The scoring criteria considered: ADA Accessibility; Aesthetics; Complexity; Constructability; Cost; ​​Ability to Encourage Active Transportation; Data Collection; Pop-Up Longevity; Safety Improvements; Vehicle Complete Stops; Lowering Speeds; Large Vehicle Accessibility; and Visibility.

The mini-roundabout and bump-outs came pretty close in their final scores, and the team moved forward with a facility design for a pop-up mini-roundabout. They weighed the pros and cons of three different materials:

  • Mixed Media (Straw Wattle; Hay Bales; Plants; Paint)
  • Spray Chalk Mural
  • Deck Stain and Traffic Paint Mural

The student team considered methods for manual traffic counts; how to navigate the permitting process; and developed a temporary traffic control plan. Taking the idea a step further, they laid out the potential design and solutions for a permanent mini-roundabout at N. Portsmouth Ave and N. Willis Blvd. 

“We had to navigate a complicated mix of different engineering standards we needed to meet at the city, state and federal level. I was surprised to find that there was not a lot of emphasis on pedestrian safety at the federal level,” said Raymond.

Inspired by the City of Portland’s Bike-to-Books annual design contest, Raymond shared that one of the highlights of the project for him was creating a coloring sheet for community members to design and envision a mini-roundabout mural that reflects local culture and values.

Now handed off to TREC, project team partners, and the César Chávez School community, we’re seeking to work with the Portland Bureau of Transportation (PBOT) to secure a permit for a three-day community event that would allow for a temporary roundabout installation. 

“We’re looking to host this community event in the Fall, before the school re-opens, so we can bring the community together to collaborate and raise awareness of traffic safety around César Chávez,” emphasized long-time Better Block PDX volunteer leader Ryan Hashagen. “This is an opportunity to showcase what the community and PSU students have to offer, and engage the city in discussing a long-term solution to pedestrian safety.”

Interested in getting involved in this community event? Contact Hau Hagedorn at hagedorn@pdx.edu.

ADDITIONAL PROJECT INFO

Download the full Better Block PSU presentation for this project here (PDF). The PSU civil engineering team included:

Angelica Ruiz

Anh Hoang

Ben Rezq

Cory Aasland

Jacob Rollins

Jane Aldagher

Jean Rwandika

Julianne Chesnutt

Leon Munirah

Maribel Pena

Myla Cross

Raymond Poss

Salvador Mercado

Trevor Mace

Photo by Sam Balto

The Transportation Research and Education Center (TREC) at Portland State University is home to the National Institute for Transportation and Communities (NITC), the Initiative for Bicycle and Pedestrian Innovation (IBPI), and other transportation programs. TREC produces research and tools for transportation decision makers, develops K-12 curriculum to expand the diversity and capacity of the workforce, and engages students and professionals through education.

Dr. Huajie Yang, who graduated in 2020 with a PhD in Urban Studies and Planning from Portland State University, devoted his doctoral research to studying the impacts of light rail transit. His dissertation, "Short-term and Long-term Effects of New Light Rail Transit Service on Transit Ridership and Traffic Congestion at Two Geographical Levels," quantitatively examines the effect of new Light Rail Transit (LRT) services on transit ridership and traffic congestion over time.

Connect with Huajie Yang on LinkedIn

Yang examined light rail's impacts at two different geographic levels. At the corridor level, he conducted case studies of two light rail lines in the Portland, Oregon region (TriMet's Green and Orange MAX lines). At the regional level, he used a synthetic control method to construct a control Urbanized Area that closely approximates the counterfactual transit ridership and traffic congestion scenario - in the absence of light rail projects - in three urbanized areas across America.

The results of the corridor-level study suggest that both the Green and Orange lines increased transit ridership in the short and long term, and relieved traffic congestion in the short term, while having no statistically significant effect on traffic congestion in the long term, likely due to induced traffic demand. Results of the regional-level study suggest that, while new light rail transit services contributed to transit ridership in most urban areas, they did relieve traffic congestion in a limited number of urban areas, and that the effect changed over time and varied across places. The comprehensively temporal and geographical analysis will provide a better understanding of the impacts of new light rail transit services on transit ridership and traffic congestion, and hence provides policy makers insightful suggestions for building light rail projects to be more sustainable and to more effectively attract riders from former automobile drivers.

Photo courtesy of TriMet

The Transportation Research and Education Center (TREC) at Portland State University is home to the National Institute for Transportation and Communities (NITC), the Initiative for Bicycle and Pedestrian Innovation (IBPI), and other transportation programs. TREC produces research and tools for transportation decision makers, develops K-12 curriculum to expand the diversity and capacity of the workforce, and engages students and professionals through education.

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