Transportation Commons^™

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.

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 …

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 …

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 …

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.

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, …

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 …

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 …

La Multiplication Des Services De Livraison À Vélo Et Les Problèmes De Santé Et De Sécurité Des Cyclistes Commerciaux : Élaboration De Bonnes Pratiques, Ugo Lachapelle, David Carpentier Laberge, Marie-Soleil Cloutier

Rapports de recherche scientifique

Les emplois nécessitant l’usage d’un vélo se sont diversifiés au-delà de la simple messagerie de plis et colis pour devenir de plus en plus nombreux. Parmi ces types d’emploi, celui qui a connu le plus grand essor à Montréal, comme ailleurs, est la livraison par vélo de repas à domicile. D’autres services mobiles, les déménagements, la vente ambulante et les entreprises de logistique du dernier kilomètre utilisent également de plus en plus souvent le vélo comme moyen de transport. Pourtant, les risques encourus par les cyclistes commerciaux sont peu connus.

Les objectifs du projet étaient d’étudier la croissance de la …

A No-Crash Course In Vision Zero Data, Anamaria Perez

PSU Transportation Seminars

Vision Zero was adopted unanimously by Portland City Council in 2015 with the goal of eliminating traffic deaths and serious injuries on Portland streets in a way that is equitable, accountable, and data-driven. But what does it mean to be data-driven? And should we stop there?

In this presentation, learn how Portland’s Vision Zero Action Plan was developed and how the Vision Zero team is using data to move into a future where all Portlanders can travel safely, regardless of the travel mode they use. Explore the datasets used in Vision Zero implementation and the challenges that come with them. …

Curb-Sided: How Technology Disrupts The American Transportation Planning Process, Mary Angelica Painter

Dissertations

The disruptive arrival of Uber, Lyft, and other transportation network companies (TNCs) into American cities ignited arguments on how policy-makers should regulate such entities. Policy debates started among policymakers, companies, and existing industries and interests. In attempts to persuade policy, actors adopted a variety of language and used different levels of government to achieve policy goals. In almost all cases, TNCs were able to gain favorable policy through image framing and venue shopping – the key components to Punctuated Equilibrium Theory (PET). This analysis looks at the policy process of three American cities: Chicago, IL, St. Louis, MO, and Austin, …

Moving Toward Equitable Transit-Oriented Developments By Integrating Transit And Housing, Hongwei Dong

PSU Transportation Seminars

Prior studies show that transit-oriented developments (TODs) increase property values and raise property tax revenue. Property owners reap economic benefit from TODs and public officials use it as evidence to justify the high cost of rail transit. However, renters, who rely on transit more than homeowners, may have to pay higher rent to live in TODs. The location affordability index at the neighborhood level suggests that renters can also benefit from TOD by saving money on transportation costs. Recent studies at the individual level, however, found little evidence that living in TODs reduces transportation expenditure. Using rental data scraped from …

Webinar: Visual Exploration Of Trajectory Data, Nikola Markovic, Mark Franz, Seth Miller

TREC Webinar Series

This webinar will demonstrate the tremendous value of GPS trajectory data in understanding statewide travel patterns and measuring performance. First, Dr. Markovic (U of Utah) will conduct visual exploration of GPS trajectories that capture about 3% of all the trips in Utah. He will briefly discuss the problem of scaling GPS trajectories to the population, and then focus on the use of scaled trajectories in computing origin-destination matrices, vehicle-hours delays, vehicle-miles traveled, and trip-based performance measures. Second, Dr. Franz (CATT Lab) will demonstrate a suite of visual analytics that enables transportation agencies to easily explore terabytes of GPS trajectory data. …

Bus-Bike Designs For The Division Transit Project, Derek Abe, Jesse Stemmier

PSU Transportation Seminars

This seminar is brought to you by the Oregon chapter of the Association of Pedestrian and Bicycle Professionals (APBP), with support from TREC at Portland State.

Transit stops and stations are a confluence of complementary and competing activities - pedestrians accessing businesses, passengers boarding and alighting, and bicyclists zipping through to their destinations. People are moving in different directions, at different speeds, and need to be able to navigate this space safely and comfortably. A common point of conflict is the bus/bicycle interaction when a transit stop is adjacent to a bike lane. Designs for integrating pedestrian and bicycle …

Critical Issues In Trucking Workforce Development, Thomas O’Brien, Tyler Reeb, Deanna Matsumoto, Diana Sanchez

Mineta Transportation Institute

This white paper identifies research opportunities focused on workforce development for the trucking industry, particularly regarding truck drivers and the truck driver shortage. Interviews were conducted with key national and state trucking industry leaders. In addition, the authors gathered information from relevant sessions at the Transportation Research Board (TRB) Annual Meeting in January of 2020. The researchers also synthesized recent literature related to the trucking industry and workforce development. Key findings indicate that 1) the shortage may be a byproduct of “churn,” where truck drivers are leaving not the industry, but their respective companies for other companies, which creates a …

Final Project Report, Nikhil Menon

CTEDD Final Project Reports - Archive

No abstract provided.

Incorporating A Reverse Logistics Scheme In A Vehicle Routing Problem With Cross-Docking Network: A Modelling Approach, Audrey Tedja Widjaja, Aldy Gunawan, Panca Jodiawan, Vincent F. Yu

Research Collection School Of Computing and Information Systems

Reverse logistics has been implemented by various companies because of its ability to gain more profit and maintain the competitiveness of the company. However, extensive studies on the vehicle routing problem with cross-docking (VRPCD) only considered the forward flow instead of the reverse flow. Motivated by the ability of a VRPCD network to minimize the distribution cost in the forward flow, this research incorporates the reverse logistics scheme in a VRPCD network, namely the VRP with reverse cross-docking (VRP-RCD). We propose a VRP-RCD mathematical model for a four-level supply chain network that involves suppliers, cross-dock, customers, and outlets. The main …

A Proposed Taxonomy For General Aviation Pilot Weather Education And Training, John M. Lanicci, Thomas A. Guinn, Jayde M. King, Beth Blickensderfer, Robert Thomas, Yolanda Ortiz

Journal of Aviation/Aerospace Education & Research

As General Aviation (GA) safety continues to remain a focus of the aviation community, GA pilot weather education and training continues to be an active area of interest within the research community. This study introduces a taxonomy for organizing GA pilot weather education and training materials that was originally conceived as part of the FAA’s Weather Technology In the Cockpit research program. The taxonomy is built upon three main knowledge categories, or tiers:1) Weather Phenomena (which includes hazards); 2) Weather Hazard Products; and 3) Weather Hazard Product Sources and their Application. The concept behind the categorization is to link knowledge …

Connected Vehicle System Design For Signalized Arterials, Xianfeng Terry Yang, Mingyue Ji, Qinzheng Wang

TREC Final Reports

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 …