Transportation Commons^™

Understanding Technology-Based Exclusion In Emerging Smart Mobility Systems, John Macarthur, Aaron Golub

PSU Transportation Seminars

As transit agencies modernize their fare payment systems, opportunities to pay with cash are reduced. This speeds boarding and lowers the cost of operations while also creating new sources of ridership data. Arguably, service is improved for riders as well as payment systems could work across modes, creating a more seamless and simplified experience. Still, about 15% of adults in the United States are without a bank account or credit card account and many rely on restrictive cell-phone data plans or don’t have access to a smartphone. These shares are even higher for public transit users. These un- and under-banked …

Suitability Of Fusing Vehicle Probe Data And Vessel Data To Contextualize The Multimodal Interaction Impacts On Corridor Mobility – A New Orleans Case Study, Kirk Zeringue

LSU New Orleans Theses and Dissertations

Using New Orleans as a case study, this thesis explores the conflation of vehicle probe data with various vessel datasets to characterize the interactions between container vessels and motor vehicles as it relates to interstate congestion in a port city. The case study investigates the impact of container vessel presence/size, fluctuations in container volumes, and container on barge services on roadway congestion. The exploration relies on comparing different conditions using cumulative distribution functions and the Innovative Trend Analysis. The results showed that fusing vehicle and vessel data is achievable and appropriate, but temporal and data completeness issues can effect results. …

Portland’S I-5 Expansion: Evaluating The Environmental And Cultural Impact Of Odot's Rose Quarter Improvement Plan, Mason Ashmore

University Honors Theses

To this day highway expansion remains one of the primary techniques employed to combat urban automobile congestion during peak hours. This paper examines the cultural and environmental shortcomings of Portland, Oregon's I-5 highway expansion project. Research for this paper primarily cites existing academic studies relating to highway expansion, Portland's complicated relationship with urban renewal, and highway expansion alternatives. The evidence suggests that Oregon's expansion project would have less than optimal impact and the resources could be used better elsewhere.

Driving Disruption: Assessing Uber's Corporate Identity In The Battle Over Driver Classification, Benjamin Peterson

Master's Projects and Capstones

This research analyzes the ongoing effort by Uber’s executives to prevent the reclassification of the company’s drivers from independent contractors to employees. Through rhetorical appeals made to customers, regulatory bodies, and drivers themselves, Uber’s executives are attempting to cultivate a corporate identity that portrays the company’s labor practices in a way that adheres to California’s labor laws, namely the “ABC” test for worker classification codified in Assembly Bill 5, while maintaining the company’s ill-gotten reputation as a bastion of Silicon Valley innovation. The success of this posturing hinges on attempts to conflate Uber’s labor practices with equitable social outcomes, publicize …

Webinar: Natural Pozzolans In The Pacific Northwest And Their Beneficial Uses, Matthew D. Sleep

TREC Webinar Series

The eruption of Mt. Mazama approximately 7,700 years ago created what is now known as Crater Lake. This eruption blanketed the Pacific Northwest with volcanic ash. This volcanic ash has been collected from several locations in Southern Oregon near the Oregon Institute of Technology campus. This volcanic ash has been tested and shown to have properties beneficial of a natural pozzolan. This seminar will present the results of a significant laboratory program to determine the natural pozzolanic capabilities of Mt. Mazama volcanic ash. In addition, information will be presented on a field application using the material to create ADA accessible …

Still Careless: Findings From A Cross-Sectional Study Of Young Pedestrians’ Risky Road Crossing Behaviors, Mina Hashemiparast, Manoj Sharma, Mohammad A. Jafarabadi, Zahra Hosseini

Environmental & Global Health Faculty Research

Background: Pedestrian-vehicle collision is one of the most common traffic injuries worldwide. This study aimed to investigate the determinants of pedestrians’ road crossing beliefs and behaviors in potentially risky situations using the Theory of Planned Behavior among Iranian young adults. Methods: This was a population-based study on a sample of 562 young adults aged 18 to 25 years living in Tehran, Iran. Data were collected by using a self-administered validated questionnaire including constructs of the theory of planned behavior and items of perceived risk and severity. The data were analyzed using independent t-test, analysis of covariance and multivariate analysis of …

Safe Speeds Save Lives: How Portland Is Managing Speeds For Safety, Matt Kelly

PSU Transportation Seminars

Speed is a key factor in how people experience Portland’s streets. Appropriate speeds help prevent crashes, reduce the harmful consequences of crashes, and can help streets become more comfortable and sociable spaces that support a variety of travel modes and uses. The Portland Bureau of Transportation will share information on how the City of Portland is supporting safe travel speeds through its Vision Zero work. Topics will include the left turn calming pilot project, speed safety cameras, speed limit reductions, and road reorganizations. Data on the results of these interventions will be shared, along with discussion of next steps for …

Webinar: Connected Vehicle System Design For Signalized Arterials, Xianfeng Terry Yang

TREC Webinar Series

It can be expected that connected vehicles (CVs) systems will soon go beyond testbed and appear in real-world applications. To accommodate a large number of connected vehicles on the roads, traffic signal control systems on signalized arterials would require supports of various components such as roadside infrastructure, vehicle on-board devices, an effective communication network, and optimal control algorithms. In this project, we aim to establish a real-time and adaptive system for supporting the operations of CV-based traffic signal control functions. The proposed system will prioritize the communication needs of different types of CVs and best utilize the capacity of the …

Creating And Using A Publicly Available Multimodal Transportation Data Archive, Tammy Lee, Kristin A. Tufte

PSU Transportation Seminars

PORTAL provides a centralized, electronic database that facilitates the collection, archiving, and sharing of data and information for public agencies within the region. The data stored in PORTAL includes 20-second granularity loop detector data from freeways in the Portland-Vancouver metropolitan region, arterial signal data, travel time data, weather data, incident data, VAS/VMS message data, truck volumes, transit data, and arterial signal data. Many of these data feeds are received by PORTAL in real time or on a daily basis and for most, the retrieval and archiving process is fully automated.

BikePed Portal: Jurisdictions around the country are collecting non-motorized …

Mount Mazama Ash Offers Sustainable Solution For Ada Accessibility On Unpaved Trails, Matthew D. Sleep, Damian K. Matzen

TREC Project Briefs

National Institute for Transportation and Communities (NITC) researcher Matthew Sleep of Oregon Tech investigated whether Mazama ash could be used in place of portland cement, as a natural pozzolan. Results indicate that it can—and unpaved trail surfaces made with Mazama ash are actually firmer and more durable than those made with portland cement alone. Such trails can provide a reliable surface for wheeled mobility devices.

Ada Accessible Trail Improvement With Naturally Occurring, Sustainable Materials, Matthew D. Sleep, Damian K. Matzen

TREC Final Reports

The Americans with Disabilities Act (ADA) provides specific guidelines and requirements that must be met in terms of accessibility. However, in the case of unpaved trails, the requirements are less defined. An ADA trail must be firm, stable and slip resistant. Some compacted aggregate material may meet this definition, but degrade over time and can no longer be ADA compliant. The benefits of using unpaved surfaces for ADA trails include fit to the natural environment, cost, sustainability and environmental benefits such as increased permeability. If an unpaved surface can be improved with the use of an additive, more could be …

What Do 15 Years Of Travel Surveys Tell Us About Tod Residents?, Nathan Mcneil, Jennifer Dill

TREC Project Briefs

Does living in a transit-oriented development (TOD) actually change the way people travel? That’s the fundamental question that 15 years of research in Portland, Oregon seeks to answer. Since 2005, Portland State University has worked with Portland’s Metro regional government to survey occupants of buildings for which developers had received funding from Metro’s Transit-Oriented Development (TOD) Program. Metro strategically invests in TODs to help more people live, work and shop in neighborhoods served by high-quality transit.

“Revisiting TODs,” the latest installment in this research, is led by Nathan McNeil, a research associate in PSU’s School of Urban Studies & Planning, …

Toward Safer Skies: An Analysis Of Global Governance Gaps And Civil Aviation Accidents, Richard Austin Gunderson

Undergraduate Honors Theses

Billions of people around the world use the global airspace system for their travel needs every year. Given the rising number of passengers traveling by air annually, it is crucial that pilots, airlines, regulatory agencies, governments, and international organizations work together to ensure the integrity of a safe and efficient global airspace system. While air travel is statistically one of the safest forms of transportation, accidents in which civilian aircraft operating on standard routes and schedules are shot down are not unprecedented. Not all airspace around the globe designated for civilian use is free from geopolitical conflict. In this project, …

The Impact Of Location On Healthcare Access For Individuals With Disabilities, Addison Kimber

Honors Scholar Theses

This paper analyzes healthcare access for individuals with disabilities living in rural areas. In current political discussion, we typically think of insurance coverage as the metric to analyze healthcare access. However, as demonstrated by studies of healthcare in the United Kingdom, people with disabilities continue to face barriers to health care even with universal healthcare systems. In particular, individuals in rural areas have less healthcare access than urban residents. This is due to factors including socioeconomic status, insurance coverage, access to competent care, and transportation. This study aims to understand if disability status exacerbates the issue of access in rural …

A Data-Driven Analysis On The Impact Of High-Speed Rails On Land Prices In Taiwan, Joyce M. W. Low, Byung Kwon Lee

Research Collection Lee Kong Chian School Of Business

High-speed rail (HSR) networks boost inter-city accessibility across a country and stimulate economic growth in inner cities. These economic gains, however, can often be accompanied by sharp increases in land and property prices along the lines that raise governmental concerns. This study examined the effect of the introduction of HSR on land prices in Taiwan and how the extent of such an effect varied with the stages of economic, societal, and infrastructural developments in different cities in Taiwan. Based on extensive published data, an empirical study was conducted using an integrated methodology comprising system dynamics, multivariate regression, and principal component …

The Adoption Of Zero-Emissions Vehicles By Low-Income Consumers In California: An Outcome Evaluation Of The Clean Vehicle Rebate Project, Julie Nguyen

Master's Projects

Is the Clean Vehicle Rebate Project (CVRP) program achieving its planned outcomes of accelerating the adoption of Zero-Emissions Vehicles (ZEVs) by low-income consumers in California? This research will evaluate what effect additional CVRP rebates provided to low-income consumers have on their adoptions of ZEVs. The purpose of this research is to determine whether the CVRP rebates are making it feasible and compelling enough for low-income consumers to adopt ZEVs at a rate that will lead to California meeting its greenhouse gas reduction goals.

Pupil Transportation Alternatives: An Analysis Of Alternative Pupil Transportation Models, Jarrett Garife

Master's Projects

The purpose of this study was to examine whether alternative pupil-transportation models are more cost efficient and safer for students than traditional school bus transportation in California. The study also focused on the fiscal and safety challenges that school districts face when transporting students. For the purpose of this analysis, “safer” will be defined in relation to the estimated injury or fatality costs resulting from a vehicle/school bus accident during pupil transportation.

The study analyzed the transportation departments of five California school districts (San Francisco Unified School District, Monterey Peninsula Unified School District, Salinas City Elementary School District, Chualar Union …

Revisiting Tods: How Subsequent Development Affects The Travel Behavior Of Residents In Existing Transit-Oriented Developments, Nathan Mcneil, Jennifer Dill

TREC Final Reports

Portland State University has worked with the Portland Metro regional government periodically since 2005 to survey occupants of buildings for which developers had received funding from Metro’s Transit-Oriented Development (TOD) Program. This research extends upon the prior TOD surveys in Portland by revisiting a set of developments with a second wave of surveys to understand how the travel behavior of TOD residents may change over time, and what factors influence change in travel patterns. The second-wave surveys, coming 8-13 years after the baseline surveys, include five TODs in the west-side Portland suburbs of Hillsboro and Beaverton, two TODs in East …

Route Choice Behaviour And Travel Information In A Congested Network: Static And Dynamic Recursive Models, Giselle De Moraes Ramos, Tien Mai, Winnie Daamen, Emma Frejinger

Research Collection School Of Computing and Information Systems

Travel information has the potential to influence travellers choices, in order to steer travellers to less congested routes and alleviate congestion. This paper investigates, on the one hand, how travel information affects route choice behaviour, and on the other hand, the impact of the travel time representation on the interpretation of parameter estimates and prediction accuracy. To this end, we estimate recursive models using data from an innovative data collection effort consisting of route choice observation data from GPS trackers, travel diaries and link travel times on the overall network. Though such combined data sets exist, these have not yet …

Hierarchical Multiagent Reinforcement Learning For Maritime Traffic Management, Arambam James Singh, Akshat Kumar, Hoong Chuin Lau

Research Collection School Of Computing and Information Systems

Increasing global maritime traffic coupled with rapid digitization and automation in shipping mandate developing next generation maritime traffic management systems to mitigate congestion, increase safety of navigation, and avoid collisions in busy and geographically constrained ports (such as Singapore's). To achieve these objectives, we model the maritime traffic as a large multiagent system with individual vessels as agents, and VTS (Vessel Traffic Service) authority as a regulatory agent. We develop a hierarchical reinforcement learning approach where vessels first select a high level action based on the underlying traffic flow, and then select the low level action that determines their future …