Data-driven policy and strategy are critical to meeting transportation goals. Where there is insufficient or incomplete data, there can be no effective solutions. It’s why we’ve focused our research efforts on filling data gaps, and why we house two national data clearinghouses – PORTAL and BikePed Portal – aimed at making transportation data more easily accessible to researchers and practitioners.

Notify me about transportation data education opportunities

Another key aspect is education. Over the years we have hosted a variety of offerings that support data collection and analysis, including:

  • Webinar Series: Webinars focused on the issues and topics important to multimodal transportation data, led by the TREC Transportation Data Manager, with support from our PORTAL partners.
  • Multi-Day Courses
    • Data Science Course - Part 1: Introduction to Scientific Computing for Planners, Engineers, and Scientists
    • Data Science Course - Part 2: Intermediate Scientific Computing for Planners, Engineers, and Scientists
  • Full and half-day Workshops
    • Survey Design: Asking the Right Questions
    • Data Analysis for Smarties Who Forgot What They Learned in College
    • R for Transportation Data Science: Application and Best Practices
    • QPED Toolkit - Qualitative Pedestrian Environments Data for better, more equitable transportation decision-making
    • Using novel data sources to support transportation planning and analysis
    • Using the PORTAL Data Archive
  • And many more seminars, panels and webinars (see our playlist of past recordings) on transportation data topics like: Counting the Underrepresented in Transportation Data: Bicyclists and Pedestrians; Fair and Accurate Data: Equity-informed Approach to Representation; and more.

Learn more about our key transportation data research and applications here.

Main Image
Transportation Webinars
Seminar or Event
Webinars
Main Image Style
Full width image
SPEAKERS
Jordan Katcher and Elizabeth Sodja, GNAR Initiative
COST
Free

PRESENTATION ARCHIVE

OVERVIEW

Small towns and cities near national parks, public lands, and other natural amenities across the West are experiencing rapid growth and increased tourism. As we have documented via our prior NITC-funded research, this has created a range of big city challenges for these “gateway communities,” particularly in the form of interconnected transportation, land use, and housing issues. Seeking to help gateway communities better prepare for and respond to their transportation and planning challenges, the Gateway and Natural Amenity Region (GNAR) Initiative team translated the findings from our research on planning and development challenges in gateway communities into an online learning program.

This program, the "GNAR Academy Fundamentals: Foundations for Planning and Collaboration in Gateway Communities and Regions" includes seven modules, each of which highlights key skills for addressing transportation and planning issues in gateway communities. This Fundamentals course will be an entry point for the rest of the GNAR Academy, which is currently in development.

In this webinar, we will introduce the GNAR Academy and Fundamentals course, explain how the course was developed, and share how we anticipate the course will result in improved transportation, planning, and development decisions in gateway communities and regions across the West.

KEY LEARNING OUTCOMES

Participants will:

  • Gain an understanding of the unique transportation and planning challenges facing gateway communities.
  • Learn about the GNAR Initiative and how it serves gateway communities.
  • Learn about the purpose and goals of the GNAR Academy.
  • Get an introduction to the GNAR Academy Fundamentals: Foundations for Planning and Collaboration in Gateway Communities and Regions course.
  • Provide input to inform future GNAR Academy course topics.

THE RESEARCH

This webinar is based on a study funded by the National Institute for Transportation and Communites (NITC) and conducted at Portland State University. Read more about the project: Tools and Resources for Gateway Communities. Past projects by the team include:

SPEAKERS

Jordan Katcher, University of Utah: Initiatives Facilitator with the Wallace Stegner Center Environmental Dispute Resolution Program and GNAR Facilitator with the Gateway and Natural Amenity Region (GNAR) Initiative

Jordan Katcher (she/her) is an Initiatives Facilitator for the Wallace Stegner Center Environmental Dispute Resolution (EDR) Program and an Adjunct Instructor within the City + Metropolitan Planning Department at the University of Utah. She serves as facilitator and operations manager for the Gateway + Natural Amenity Region (GNAR) Initiative, facilitates community conversations, conducts situation assessments, and provides training and coaching related to conflict management and collaborative process design. Outside of work, she enjoys forest bathing, baking sourdough bread, traveling, laughing with loved ones, and practicing gratitude.

 

Elizabeth Sodja, Utah State University: GNAR Coordinator with the Gateway and Natural Amenity Region (GNAR) Initiative

Elizabeth Sodja is the Program Coordinator for the Gateway & Natural Amenity Region (GNAR) Initiative at Utah State University (USU) Extension. She has a decade of communications and community outreach experience, and has worked with federal, state, and local government agencies. Before joining GNAR, she worked for USU's Center for Community Engagement and the National Park Service. She grew up in a small town in Utah where most family vacations were either camping, fishing, or in a National Park, and has a passion for helping small towns around the west preserve what is special about them. When she isn't working, you can usually find her and her husband climbing a rock, living out of a tent, or driving down a dirt road covered in dog hair.

 

PROFESSIONAL DEVELOPMENT

This 60-minute webinar is eligible for 1 hour of professional development credit for AICP (see our provider summary). We provide an electronic attendance certificate for other types of certification maintenance.

LEARN MORE

Sign up for our newsletter to get updates on our events.

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

CREDIT
PDH: 1 | AICP: 1
Is Visiting Scholar
Off
DATE
-

One of the ways in which we seek to inform transportation decision making is through the education of current and future transportation professionals. To that end, we host one or more webinars per month, covering a wide range of research topics that advance mobility for people and goods

These webinars are supported by a variety of grants and partners, primarily funded by our National Institute for Transportation and Communities (NITC) - one of seven national University Transportation Centers (UTC) of the U.S. Department of Transportation.

All of our webinars are provided to the public for free, and recorded and archived on our site for anyone to access. To get notifications of upcoming seminars and webinars, sign up for our monthly newsletter here.

Main Image
Transportation Seminars
Seminar or Event
Friday Seminars
Main Image Style
Full width image
SPEAKERS
Bruce Appleyard, San Diego State University
COST
Free and open to the public

Friday Transportation Seminars at Portland State University have been a tradition since 2000. We've opened up PSU Transportation Seminars to other days of the week, but the format is the same: Feel free to bring your lunch! If you can't join us in person, you can always watch online via Zoom.

PRESENTATION ARCHIVE

THE TOPIC 

Streets constitute the majority of our urban public spaces, yet we struggle everyday with how they should be designed and operated for travel, safety, and livability.

In 1969, when Dr. Bruce Appleyard was 4 years old, he was hit by a car and nearly killed. Around that time his father, Donald Appleyard, started work on what would become Livable Streets, published in 1981 – a ground-breaking and seminal work, the product of more than a decade of rigorous research and thoughtful analysis that would uncover the ill effects of traffic and laying out the seminal arguments that streets are for people.

On September 23, 1982, a year after Livable Streets was published, Donald Appleyard was killed by a speeding, drunk driver in Athens, Greece—it was never reprinted. And so it goes, one of the most important books on street safety and livability was itself bookended by two horrific events of traffic violence. In 2021, Dr. Bruce Appleyard published an updated version, Livable Streets 2.0. Dr. Appleyard’s talk will revolve around the work of Livable Streets and Livable Streets 2.0, including the old as well as the new research research around the general theory that streets are for people, not merely conduits for cars. His talk will also deal directly with the Conflict, Power, and Promise of our streets, which will be presented to spur on group discussion. Participants are invited to reflect on their own research and work on streets and on such topics as street livability, complete streets, and Vision Zero.

KEY LEARNING OUTCOMES

  • Gain an understanding of the history of research, theoretical arguments, and findings related to the conflict, power, and promise of our streets.
  • Gain an understanding of how to design and create streets that are both safe and livable for people, specifically for pedestrians and bicyclists.
  • Gain an understanding of the challenges and opportunities in the way of making streets safe and livable, now and in the future of driverless cars.

SPEAKER

Bruce Appleyard, San Diego State University

Dr. Appleyard is a Professor of City Planning and Urban Design at San Diego State University (SDSU) where he is the Director of The Active Transportation Research (ATR), the Action Institute for Sustainability, Livability, and Equity (AISLE), and SDSU’s Director of the national Center for Pedestrian and Bicyclist Safety (CPBS). Working at the intersection of land use, housing, transportation, and urban design, he helps people and agencies make more informed decisions about how we live, work, and thrive. Working from the human to regional/ecosystem scale, he is an author of numerous peer-reviewed and professional publications, and is the most highly cited scholar in the SDSU School of Public Affairs. He is also a renowned expert on urban quality, regional planning, the future of transport, street livability and designing for pedestrians and bicyclists.

PROFESSIONAL DEVELOPMENT

This 60-minute seminar is eligible for 1 hour of professional development credit for AICP (see our provider summary). We can provide an electronic attendance certificate for other types of certification maintenance.

ADD TO CALENDAR

Photo by Page Light Studios/iStock

Portland State University's Transportation Research and Education Center (TREC) is home to the U.S. DOT funded National Institute for Transportation and Communities (NITC), the Initiative for Bicycle and Pedestrian Innovation (IBPI), PORTAL, BikePed Portal and other transportation grants and programs. We produce impactful research and tools for transportation decision makers, expand the diversity and capacity of the workforce, and engage students and professionals through education and participation in research.

LOCATION
Vanport Building room 269
CREDIT
PDH: 1 | AICP: 1
Is Visiting Scholar
Off
DATE
-

Transportation Seminars at Portland State University have been a tradition since 2000. Formerly known as the "Friday Transportation Seminar" series, we've opened up the schedule to accommodate more audiences post-pandemic and the seminars are no longer held exclusively on Fridays. With over 450 seminars presented and recorded, we host both visiting and local scholars to share the latest in research, technology, and implementation in transportation. This seminar series is supported by PSU's Toulan School of Urban Studies and Planning and Department of Civil and Environmental Engineering.

WHO CAN ATTEND: This series is free and open to the public.
WHERE: Online or in person at PSU. Check each individual seminar page for location info for that seminar.
ACCESSIBILITY: The Vanport Building (where most seminars are held) has wheelchair-accessible entrances on 4th and 5th Avenue. If you need to request reasonable accommodations, email us at asktrec@pdx.edu.

WATCH ONLINE: Watch online via the registration link on each seminar page
HOW DO I HEAR ABOUT THEM? To get notifications of upcoming seminars and webinars, sign up for our monthly TREC at Portland State newsletter.

Jennifer Dill, director of Portland State University's Transportation Research and Education Center (TREC), has been named the inaugural editor-in-chief of the Transportation Research Record (TRR). The TRR—the flagship journal of the National Academies of Sciences, Engineering, and Medicine’s Transportation Research Board (TRB)—is one of the most cited and prolific transportation journals in the world, offering wide coverage of transportation-related topics.

While maintaining her current role as the director of TREC, Dill will begin her duties at TRR on July 15, collaborating with the TRR team and TRB volunteers to enhance the journal’s role in improving the nation's transportation system through high-quality research.

"The Transportation Research Record and TRB have played key roles in my scholarly and professional career. My very first peer-reviewed journal article was published in TRR based on research I did as an undergraduate student with my mentor, Dr. Dan Sperling. That opportunity opened my eyes to the possibility of being a researcher and professor," Dill said.

Prior to entering academia, Dill worked as an environmental and transportation planner at the federal and regional levels. When she first started as an assistant professor at Portland State University, she was inspired by an article in TRR to start a new thread of research focused on bicycling. This has shaped her career ever since: Dill today leads TREC, a national center in the field of active transportation research, while her own research continues to advance the state of practice around sustainable, multimodal transportation. Her work focuses on decision-making at both the individual and institutional levels, with a particular interest in multimodal and active transportation and the impacts of these choices on health, equity, infrastructure, and the environment.

"I have continued to publish in TRR... because I want my research to reach a particular audience—practitioners who can use the findings to make better decisions, like I did early on in my career," Dill said.

Portland State University's Transportation Research and Education Center (TREC) is home to the U.S. DOT funded National Institute for Transportation and Communities (NITC), the Initiative for Bicycle and Pedestrian Innovation (IBPI), PORTAL, BikePed Portal and other transportation grants and programs. We produce impactful research and tools for transportation decision makers, expand the diversity and capacity of the workforce, and engage students and professionals through education and participation in research. To get updates about what's going on at TREC, sign up for our monthly newsletter or follow us on social media.

The need for improving active transportation safety and mobility is clear: Nationally, since 2004, the share of all road user deaths that are pedestrians has risen from just under 11% to nearly 17% in 2020. Cyclists’ share of all fatalities has also increased over the past decade, from 2.1% in 2011 to 2.4% in 2020.. In many cases, solutions are also clear: for example, there are numerous evidence-based approaches to making walking and bicycling safer and more comfortable through improved infrastructure. So if the needs and solutions are clear, why are we not progressing more quickly toward improved road safety and better active transportation options?

In many ways, walking, bicycling, and rolling have not been a top priority for state departments of transportation (DOTs). Changing agency practice is essential: DOTs need research to help them better implement active transportation effectively and seamlessly.

This is the objective of a newly launched project, funded by the National Cooperative Highway Research Program (NCHRP). Over two years, researchers will create an active transportation institutionalization guide to help state DOTs change their culture and processes and integrate active transportation into every stage of their work, from program development and project funding to project delivery, operations and maintenance.

The research team is led by Jennifer Dill of the Transportation Research and Education Center (TREC) at Portland State University (PSU), along with Nathan McNeil and John MacArthur. Project partners include Erin Flanigan at Applied Research Associates (ARA), who has pioneered the application of the Transportation Systems Management and Operations (TSMO) CMM assessment framework at multiple transportation agencies, and Kelly Rodgers at Streetsmart Planning.

WHAT WILL THE NEW PROJECT DO? 

The objective of this project is to provide a framework for state DOTs to institutionalize active transportation. The guide produced by the research team will include a capability maturity model (CMM) for organizational assessment of readiness. 

The framework and guide will also include:

  • examples of successful implementation practices;
  • models for partner and stakeholder coordination and public engagement;
  • considerations for organizational structure, policy, process, and procedural changes needed to embed and integrate active transportation into program development, project funding, project delivery, operations, and maintenance; and
  • strategies for overcoming barriers to implementing and institutionalizing transportation improvements to equity, access, safety, and health.

Read more about the new project: NCHRP 08-164: Institutional Integration of Active Transportation

Photo by ArtMassa/iStock

Portland State University's Transportation Research and Education Center (TREC) is home to the U.S. DOT funded National Institute for Transportation and Communities (NITC), the Initiative for Bicycle and Pedestrian Innovation (IBPI), PORTAL, BikePed Portal and other transportation grants and programs. We produce impactful research and tools for transportation decision makers, expand the diversity and capacity of the workforce, and engage students and professionals through education and participation in research. To get updates about what's going on at TREC, sign up for our monthly newsletter or follow us on social media.

Transportation decision-makers typically use benefit-cost analysis (BCA) to evaluate the tradeoffs of transportation projects. However, it is difficult to produce state-specific measures that are multimodal and can consistently evaluate the full range of public and private benefits and costs for Oregonians.

Supported by a $200,000 grant from the Oregon Department of Transportation (ODOT), Jenny Liu of Portland State University will lead a research effort to develop an Oregon-specific, multimodal framework for transportation benefit-cost analysis.

Having a framework specifically tailored to Oregon can help ODOT make informed decisions on infrastructure, policies and support programs based on information about the economic and societal impacts of each transportation mode.

Launched in May 2024, the project, "Mode-Based Benefit-Cost Analysis Calculator" aims to create an easy-to-update Oregon BCA framework to compare transportation benefits and costs for better policy, program, and investment assessments. The research will also develop a methodology that incorporates equity and distributional assessments into the multimodal BCA framework. This will contribute to ODOT’s Strategic Action Plan priority of equity and inclusion.

The primary outcome of this project will be an easy-to-use, quantified assessment tool for transportation costs. Knowing public and private costs based on locally-specific and well-sourced data will help ODOT make financially sustainable decisions, as well as apply for federal discretionary funding. 

Findings from this research will have broad application in ODOT, supporting the agency’s greenhouse gas reduction goals and incorporating equity and distributional considerations. 

For example, "VisionEval" is a version of Oregon's statewide GreenSTEP model, which was developed by the Oregon Department of Transportation (ODOT) to conduct long- range strategic planning. VisionEval modeling has a social cost parameter that can be used to assess the cost of a scenario. The project team will collaborate with the ongoing research project Development Of A New Visioneval Land Use Model And Applications To Evaluation Of Climate Strategies In Oregon, in which PSU's Liming Wang is working to update the VisionEval land use models and applications, to identify how the BCA framework might best be integrated into future developments.

The new project will also support communication around tolling and road usage charges by providing an accessible assessment of the cost of subject modes, and guide efficient decision-making about transportation system development by demonstrating economically efficient modes. An interactive dashboard will be developed to help ODOT users further integrate the new BCA framework into ODOT practice.

Photo courtesy of the Oregon Department of Transportation

Portland State University's Transportation Research and Education Center (TREC) is home to the U.S. DOT funded National Institute for Transportation and Communities (NITC), the Initiative for Bicycle and Pedestrian Innovation (IBPI), PORTAL, BikePed Portal and other transportation grants and programs. We produce impactful research and tools for transportation decision makers, expand the diversity and capacity of the workforce, and engage students and professionals through education and participation in research. To get updates about what's going on at TREC, sign up for our monthly newsletter or follow us on social media.

Shared micromobility (including shared electric scooters and bikes provided by private companies) is one of the newest transportation options that has come to cities in the last several decades. A new report explores the different ways cities charge shared micromobility companies to operate, and how these funds are used.

In the newly released report, John MacArthur of Portland State University, Kevin Fang of Sonoma State University and Calvin Thigpen of Lime examine data from 120 cities in 16 countries around the world. They also conducted a survey of cities’ shared micromobility program managers, with responses representing 33 jurisdictions in North America.

Download the report: "Taxing shared micromobility: assessing the global landscape of fees and taxes and their implications for cities, riders, and operators (PDF)"

"This study builds our understanding of a topic that is near and dear to the hearts of cities, riders, and micromobility operators: how to run a system that is affordable for riders while also remaining financially sustainable for micromobility operators. In the last 6 months alone, the industry has seen substantial upheaval through mergers, bankruptcies, and closures. So as cities revisit their program regulations, we hope they take into consideration that the industry has matured substantially since fees were initially established - with safer vehicles, better operations, and closer city collaboration - as well as the role shared micromobility can play in achieving sustainability and equity goals," Thigpen said
 

Digging into how each city made the decision of what to charge, the researchers find that taxes and fees vary dramatically from city to city and may not always reflect the city's stated policy goals.

"Though cities are using fees and taxes to mitigate the cost of program administration, which is very understandable given local budget constraints, these additional costs to riders can be at odds with a city’s broader goals for supporting sustainable and equitable transportation," MacArthur said.

The findings also reveal a trend of cities charging less for shared bicycles than for shared scooters. The notable exception to this pattern is Denver (which has both e-bikes and scooters), where the city does not differentiate between vehicle types and charges no program fees.

"One concern sometimes raised about shared micromobility are user fares. To the degree fees increase the cost of business and get passed along to riders, cities have a say in fares with their fee levels," Fang said.

Four Key Findings

1) Fees vary dramatically between cities. Some cities do not impose program fees at all, in line with municipal transportation goals. In cities that do assess program fees, the common types are per-trip, per-vehicle, flat annual, and flat one-time fees. There are large differences in the fee amounts that cities charge – for example, the highest per-vehicle fee is over four hundred times higher than the lowest.

"Fee levels were consistently inconsistent. In some cases, cities had zero permit fees. On the other end they could be a dollar or two for every trip," Fang said.

2) Shared micromobility is taxed twice—via sales tax and program fees—and these revenues can be substantial. On average, cities charging an annual fee received over a third of a million USD each year. If sales taxes/value added taxes (VAT) are included with fees, the average shared micromobility trip generates a fee + tax revenue of $0.70 USD per mile or $0.89 USD per trip. This means that globally, shared micromobility programs bring in an average rate of 16.4% of revenue from user fares in taxes and fees.

3) Shared micromobility taxes and fees are higher than most other modes of transportation, especially driving and ridehail. The research team found that fees and taxes on shared micromobility are significantly higher compared to other travel modes, being 23 times higher per mile than personal cars and over 5 times higher than ridehail trips.

"On average, fees and taxes on shared micromobility were quite a bit higher than charges on personal driving or ride-hail trips. This seems counter to many cities' goals of promoting alternative modes of travel," Fang said.

4) When deciding on fees, cities are especially concerned with covering administrative costs as well as influencing operator behaviors. The primary use of fee revenue is to cover program administration costs, rated as the top consideration by 77% of respondents (see chart below). Ensuring financial feasibility for scooter companies or lowering rider costs were less prioritized, even though both would benefit the shared micromobility system.

While cities’ concerns over budget are understandable, this consideration can be at odds with cities’ broader goals for supporting alternative transportation.

"After the boom of shared micromobility in 2017, cities looked at fees as a way to react to this new mode. We see that cities are still setting fees to cover program administration costs, but also as a way to influence operator behavior of how they operate their systems in the public rights-of-way," MacArthur said.

Download the report (PDF) for details about the research, including the survey that was distributed to shared micromobility program staff and the methods used to calculate taxes and fees for other modes of transportation. The report's appendix includes a complete summary of program fees in each jurisdiction as well as shared micromobility program fee revenues in 2022.

Who Can Use This Research?

Fees and taxes are relevant to all three of the major "stakeholders" in the shared micromobility field: cities, private micromobility companies, and travelers.

There have been numerous studies on cities’ shared micromobility policies around parking, ridership, safety, equitable distribution of vehicles, and sustainability. By contrast, there has been little research on the taxes and fees levied on shared micromobility systems and how they work to advance or deter municipal goals for shared micromobility.

The researchers provide case studies of cities taking different—and evolving—approaches to illustrate how different cities weigh tradeoffs. The information provided in this report can help inform cities who are working with shared micromobility companies to align program fee structures with their goals around climate, equity, congestion and more.

In a section offering rationales for lowering (or not charging) fees, the report notes that the shared micromobility landscape has changed since e-scooters first swept the world in 2017 and 2018. The shared micromobility industry no longer deploys at-will in city streets, but rather works through formal procurement processes to serve cities.

"Considering the newness of shared micromobility, it is not that surprising that approaches to fees have varied so widely initially. Today, though, cities are mostly on the same page with what they want with micromobility operations, so greater alignment on fees probably makes sense," Fang said.

Shared scooters and bikes are no longer just pilots; most cities now have multi-year permits with established operators. Both cities and companies are aware of the risks of poorly managed systems and have developed technologies and programs to address equity and operational challenges. This research offers a comprehensive look at how cities around the world are approaching the question of what to charge, and offers strategies to ensure that a city's fee structure supports transportation policy goals.

Portland State University's Transportation Research and Education Center (TREC) is home to the U.S. DOT funded National Institute for Transportation and Communities (NITC), the Initiative for Bicycle and Pedestrian Innovation (IBPI), PORTAL, BikePed Portal and other transportation grants and programs. We produce impactful research and tools for transportation decision makers, expand the diversity and capacity of the workforce, and engage students and professionals through education and participation in research. To get updates about what's going on at TREC, sign up for our monthly newsletter or follow us on social media.

In a new project that's just getting underway, Portland State University researchers will work with researchers at the University of North Carolina (UNC) at Chapel Hill to develop tools and a decision-making process to proactively design and retrofit roadways to make them safer. 

Led by Sirisha Kothuri of the Maseeh College of Engineering & Computer Science and supported by the Washington Department of Transportation (WSDOT), the effort aims to help WSDOT implement a Safe System Approach to prevent dangerous crashes. They intend to implement safe systems in conjunction with another principle embraced by WSDOT and many other transportation agencies, the Complete Streets concept. Complete Streets is a planning and design method that prioritizes safe access for all road users.

"PSU along with UNC is excited to help WSDOT implement the Safe System Approach to road safety within the Complete Streets context. This work aims to reduce crashes for all road users generally, and in particular to eliminate fatal and serious injury crashes," Kothuri said.

WHY THE SAFE SYSTEM APPROACH?

As described by the United States Department of Transportation (U.S. DOT), the Safe System Approach has been embraced by the transportation community as an effective way to address and mitigate the risks inherent in our transportation system. It works by building and reinforcing multiple layers of protection to both prevent crashes from happening in the first place and minimize the harm caused to those involved when crashes do occur. It is a holistic and comprehensive approach to making places safer for people.

In the 2022 Legislative session, with WSDOT input, Washington's state transportation budget included requirements to develop Complete Streets projects using safe system principles. The U.S. DOT, too, has formally adopted the approach as part of its National Roadway Safety Strategy. The Safe System Approach calls for strengthening every part of the transportation system with safer roads, safer vehicles, safer speeds, safer road users, and post-crash care to create an overlap of countermeasures that prevent death and serious injury. 

PROJECT GOALS AND OBJECTIVES

Current fatality and serious injury trends continue to rise steeply for all road users, particularly vulnerable users, in both Washington State specifically and across the United States more broadly. With the $199,750 in funding from WSDOT, the PSU research team will spend the next two years developing a knowledge base to enable planners and engineers to influence planning, programming, design, and operational decisions in order to reduce fatal and serious injury crashes. 

Included in this knowledge base will be specific, illustrated approaches for evaluating route directness (RDI) and level of traffic stress (LTS) on both the corridor level and project level. The team will identify potential approaches to navigating the problem of traffic stress: Either by directly lowering the LTS of a roadway through strategies like lowering speeds, reducing lane number, or reducing annual average daily traffic so that less costly multimodal facilities will be needed; or else by mitigating LTS with robust multimodal treatments.

The researchers will create tools in the form of matrixes, tables, worksheets and other systems that will enable the people involved in planning, scoping, and designing Complete Streets to identify specific solutions (treatments, or suites of treatments) that act as mitigations to lower LTS to the Complete Streets goal.

NEXT STEPS

To begin this work, the research team will first consult with WSDOT to select a variety of sites for case studies. The selected sites will contain intersections and roadway segments with different characteristics in terms of roadway geometry (intersection or segment configuration), traffic volumes (vehicle and non-motorized), transit service and availability, and roadway context (land use typologies, equity metrics, and other built-environment or sociodemographic characteristics).

The case study analysis will focus on how geometric, operational, and contextual features contribute to crashes. Results of the evaluations will be compared to determine the effects on safety of different site-specific characteristics.

THE PROJECT TEAM

Applying the Safe System Approach in Decision-Making

The team, consisting of researchers from Portland State University and the University of North Carolina at Chapel Hill, bring a wealth of experience in the Safe System Approach. Sirisha Kothuri of PSU and Wesley Kumfer of UNC will be the Co-Principal Investigators on this study. They will be assisted by PSU's Jason Anderson and UNC's Stephen Heiny and Alessandro Figueroa.

Photo by Dongho Chang, WSDOT State Traffic Engineer and Director of Transportation Operations

Portland State University's Transportation Research and Education Center (TREC) is home to the U.S. DOT funded National Institute for Transportation and Communities (NITC), the Initiative for Bicycle and Pedestrian Innovation (IBPI), PORTAL, BikePed Portal and other transportation grants and programs. We produce impactful research and tools for transportation decision makers, expand the diversity and capacity of the workforce, and engage students and professionals through education and participation in research. To get updates about what's going on at TREC, sign up for our monthly newsletter or follow us on social media.