Transportation Commons^™

Revving Up Or Stalling Out? Examining The Effectiveness Of Electric Vehicles In Combating Climate Change, Meghan E. Miller Termat

Villanova Environmental Law Journal (1991 - )

No abstract provided.

Accessible Bike Map Design: A Review And Critique Of Portland’S Bike Maps, Zachary Cheyney

Geography Masters Research Papers

Urban bike maps can serve as key tools for route planning and navigation for prospective cyclists, providing both general information (such as landmarks and natural features) and cycling specific information (such as bike lane infrastructure types and cycling amenities). Despite this, there is little professional guidance or academic research on best practices for bike map design. Potential guidance should consider the full range of potential cyclists, including disabled cyclists who have often been left out of cycling policy discussions. In this paper, I begin by discussing 3 case studies on participatory mapping methodologies with disabled participants in order to generate …

Active Transportation Data Fusion: Incorporating Big Data To Estimate Volumes, Joeseph Broach, Sirisha Kothuri, Nathan Mcneil

PSU Transportation Seminars

Planners and decision-makers have increasingly voiced a need for network-wide estimates of bicycling and walking. Such volume estimates have for decades informed motorized planning and analysis but have only recently become feasible for non-motorized travel modes. Recently, new sources of activity data have emerged derived primarily from GPS-based smartphone location data, both app-based and passively collected. The project team has led several research projects aimed at evaluating and integrating the emerging sources with conventional demand data, including observed bicycle and pedestrian counts, to assess the value added of various emerging sources and the potential for estimating network-wide volumes. This presentation …

A Feedback-Guided Analysis Of Environmental, Health And Socio-Economic Factors Affecting Drivers’ Willingness To Shift To E-Jeepneys, Charlotte Kendra Gotangco Gonzales, Katrina Abenojar, Carlos Rosauro Manalo, Melliza Templonuevo Cruz, Maria Obiminda L. Cambaliza, James Bernard Simpas, Imee Delos Reyes, John Wong, Bernell Go, Krizelle Cleo Fowler, Rene Marlon Panti, Emma E. Porio, Jean Jardeleza Mijares

Environmental Science Faculty Publications

The Jeepney Modernization Program involves the replacement of traditional jeepneys with more efficient alternatives, including modern enclosed electric vehicles, alongside operational improvements to the public transportation system. This study aims to assess the environmental, health and socio-economic factors impacting drivers’ willingness to shift to e-jeepneys. Feedback-Guided Analysis was used as a framework for designing an interdisciplinary approach towards understanding the decision-making paradigms of drivers plying a specific route in Quezon City, Metro Manila. Measurements of drivers’ exposure to PM2.5 and associated health parameters were complemented by key informant interviews delving into income, expenses, valuation of benefits and decision-making paradigms. A …

Investigating The Conversion Of A Signalized Intersection To A Turbo Roundabout, Vyshnavi Shetty, Mycola Sauciur, Anurag Pande

Mineta Transportation Institute

Turbo roundabouts are multilane roundabouts with helical pavement markings and raised structures. While they have seen widespread use in Europe, California is only the second state in the U.S. (after Florida) to have installed a turbo roundabout. Turbo roundabouts separate the ingress and circulating roadways. The concept was proposed and implemented in the Netherlands to mitigate congestion by improving traffic flow efficiency and addressing safety concerns on conventional multilane roundabouts. This research evaluates the first-ever turbo roundabout in California and compares its safety and operational performance with the previously existing 4-legged signalized intersection. The research team obtained safety and operational …

Assessing The Perceived Safety Of Cyclists With Virtual Reality, Vahid Balali

Mineta Transportation Institute

In 2022, 7,522 pedestrians and 1,084 bicyclists were killed and approximately 67,000 pedestrians and 46,195 bicyclists injured in motor vehicle crashes on public roadways in the United States, according to the Insurance Institute for Highway Safety (IIHS). The transportation industry is faced with a pressing need to bolster the safety of these vulnerable road users. This research develops models of design and environmental factors that influence bicyclists’ and pedestrians’ perception of safety using Virtual Reality (VR) technology and ultimately informs transportation infrastructure design to better accommodate nonmotorized travelers. The goal of the bicycle element of this research is to develop …

Smart Highway Construction Site Monitoring Using Artificial Intelligence, Mehran Mazari, Yahaira Nava-Gonzalez, Ly Jacky N. Nhiayi, Mohamad H. Saleh

Mineta Transportation Institute

Construction is a large sector of the economy and plays a significant role in creating economic growth and national development,and construction of transportation infrastructure is critical. This project developed a method to detect, classify, monitor, and track objects during the construction, maintenance, and rehabilitation of transportation infrastructure by using artificial intelligence and a deep learning approach. This study evaluated the performance of AI and deep learning algorithms to compare their performance in detecting and classifying the equipment in various construction scenes. Our goal was to find the optimized balance between the model capabilities in object detection and memory processing requirements. …

Corridor Operational Performance Of Transit Signal Priority, Ayobami Gbenga Olaleye

Theses (2016-Present)

Transit Signal Priority is an intelligent transportation system strategy introduced to enhance the operational efficiency of public transit. The operations of TSP adjust the existing traffic signal timing plan to give preferential treatment to buses, streetcars, or other transit vehicles. This strategy improves efficiency, reliability, and overall network performance. This research mainly focuses on evaluating TSP performance using the green strategy on Studemont/Studewood Street in Houston, Texas, and the performance is measured based on travel time. Data that includes the existing travel time, turning movement count, bus information, and other essential data were collected to achieve the research objectives. Microscopic …

Beyond Congestion Pricing, Gregory H. Shill

Journal of Law and Mobility

After years of political and legal efforts to block it, congestion pricing finally went into effect in New York City in January 2025. Early indications are positive, though threats to its continuation from the Trump administration and others remain. But its journey to this point has already made one thing clear: it is time for the Big Apple to seize more of its own destiny in transportation policy.

The battles that delayed and still imperil the Metropolitan Transportation Authority’s congestion pricing scheme underscore the need for policies that New York City can implement unilaterally. Making urban transportation policy in the …

Preventing Carbon Emissions With Imaging-Based Civil Infrastructure Assessment And Evaluation, Thomas Schumacher

PSU Transportation Seminars

For concrete bridges without existing plans, simplified and highly conservative load rating (structural evaluation) methods may be used, which can lead to unnecessary load restrictions, unjustifiable strengthening, or in the worst case, preventable replacements. Avoiding these outcomes not only saves money but it prevents carbon emissions from longer travel and construction activities and resources associated with replacement.

This presentation discusses a case study of a prestressed concrete bridge that required a load rating, and for which no plans existed. Imaging and image fusion using radar and ultrasonic measurements taken from the top and bottom of the slab were performed to …

Modernizing Railroad Crossings In Gettysburg, Paul Zaim

CAFE Symposium 2025

This project is an investigation of the current state of railroad crossings in the Borough of Gettysburg, including the physical state and shortcomings of each grade crossing. In addition, the project includes a proposal to improve the safety rating of the crossings through a legislative and traffic analysis, including the feasibility of implementing a “Quiet Zone” in the borough complete with an estimated cost breakdown.

Tolland Triangle Project, Garrett Bumps

CAFE Symposium 2025

The Tolland Triangle Project identifies the unique factors that increase the accident rate on a portion of I-84 in Tolland, Connecticut, and establishes an action plan to mitigate the issue. Despite past setbacks in this area, Tolland residents are ready for solutions, and this advocacy plan enables citizens to have their voices heard, and seek solutions from their government on a city, state, and federal level.

Why Are Fairness Concerns So Important? Lessons From A Last-Mile Transportation System, Yiwei Chen, Hai Wang

Research Collection School Of Computing and Information Systems

The Last-Mile Problem refers to the provision of travel service for passengers from the nearest public transportation node to the final destination. The Last-Mile Transportation System (LMTS), which has recently emerged, provides on-demand last-mile transportation service for passengers. We consider an LMTS that consists of two types of passengers, regular-type passengers and special-type passengers (e.g., seniors, disabled people). The valuation of the last-mile service for special-type passengers is statistically higher than the one for regular-type passengers. Passengers incur disutility from waiting for the last-mile service. In this paper, we explore two fairness constraints on special-type passengers: (1) the fare for …

Intelligent Blind Crossings For Suburban And Rural Intersections, Shahab Tayeb

Mineta Transportation Institute

Blind intersections in suburban and rural areas pose significant safety challenges due to limited visibility and inadequate infrastructure. This project proposes an innovative solution leveraging the Internet of Vehicles (IoV) paradigm, utilizing connected and autonomous vehicles (CAVs) for seamless communication to enhance safety at these intersections. The research focuses on developing a specialized Road-Side Unit (RSU) system equipped with a Virtual Traffic Light Algorithm implemented on a Field-Programmable Gate Array (FPGA). Key stakeholders, including transportation authorities, vehicle manufacturers, and local communities, stand to benefit from this initiative. The RSU system acts as a critical infrastructure component, facilitating efficient intersection management …

Analysis Of Access And Egress Mode Choice To High-Speed Railway Stations, Jiaoe Wang, Yongling Li, Junfeng Jiao

Research Collection College of Integrative Studies

High-speed railway (HSR) has become a key mode for short- to medium-haul transportation intercity trips in China and has been regarded as a competitor to air transportation. While significant research has explored daily travel mode choices and access/egress modes for other intercity transport hubs, the factors influencing access and egress to HSR stations – particularly those related to the built environment – remain underexamined. This paper analyses access/egress mode choices for intercity travel along the Beijing-Shanghai HSR corridor using 2015 survey data. The findings show that, during the access stage, the number of bus stations at HSR stations reduces car …

Insights For The Future Of Car Rental And Ridesharing: Driving Behavior Across Different Levels Of Automation, Pranav Meda, Aubrey Victoria Contreras, Wei-Hsiang Lo, Gaojian Huang, Yue Luo

Mineta Transportation Institute

Autonomous vehicles are reshaping the car rental and ridesharing industries, potentially leading to a unified model of on-demand transportation suitable for both uncommon (e.g., business trips) and daily commuting. An exploratory study of human behavior towards autonomous vehicles can uncover the challenges and opportunities inherent in different levels of vehicle automation. This study aims to (a) identify behavioral differences in drivers operating vehicles at various levels of automation and (b) explore how these behaviors vary with different assistance feature styles, specifically between risky and conservative modes. Human-subject experiments were conducted among twelve participants (aged 21 to 29, including four women) …

Understanding The Prevalence Of Mental Health And Behavioral Distress In Transit Assaults And Presenting Targeted Response And Mitigation Methods To Reduce Victimization Trends, Kathleen Moore, Emilie Ellenberg, Melissa Carlson, Jodi Godfrey, Lisa Staes

Mineta Transportation Institute

This research project was performed to better understand the prevalence of mental health and behavioral distress in transit assaults and present corresponding targeted response and mitigation methods to reduce victimization trends. It includes a literature review, a data presentation and overview of reported public transit assault-related events, an examination of the contributing factors to those events, and documentation of 10 transit agency case studies. The literature review discusses some of the misconceptions of mental illness and associated stigmas and discrimination that can occur in response to these misconceptions. It discusses various approaches and strategies that transit agencies have used to …

The Journey Toward Sustainability: Positive Impact Of Environmental, Social, And Governance Index On Transportation., Doreen Mcgunagle, Laura Zizka, Ron Mau, Patti Clark

Publications

The transportation industry has been criticized for its hefty environmental footprint, questionable social practices, and lack of transparency regarding governance. Thus, more companies have begun including Environmental, Social, and Governance (ESG) issues in their strategies. Research has shown that effectively integrating ESG into business models can improve financial performance by tackling environmental, social, and governance challenges. This sustainable progress can be quantified by considering the extent to which the products or services produced by the firm’s harm or benefit social welfare. The current research paper examines ESG and financial performance over time in the Transportation Industry by comparing data from …

Political Turbulence And Aviation Safety: A Cross-National Analysis Of Political Stability's Effects On Aviation Accidents, Léa Faure, Lilliam Maria Cáceres Malachowski

Journal of Aviation/Aerospace Education & Research

To what extent does political stability affect aviation safety? This research aims to link domestic political conditions and public safety through the consideration of aviation accident frequency. Political instability can indeed have profound effects on reducing overall public safety in a variety of domains through its influence on public policies. Reduced regulations and governance efforts can appear in contentious contexts for less-prioritized fields. This could influence the reemergence of technical aviation risk factors like crew training and performance, maintenance issues, infrastructure problems, human errors, etc. This would highlight a correlation between such political instability and weaker aviation safety regulations, investments …

The Economic And Environmental Impact Of Shinkansen And High-Speed Rail Infrastructure: A Comparative Analysis Of Economic Growth And Carbon Emissions Reduction, Dillan R. Victory

SPARK Symposium Presentations

The development of Japan's high-speed rail system, the Shinkansen, has played a pivotal role in the country's post-war economic resurgence. Introduced in 1964 with the Tokaidō Shinkansen, this transformative infrastructure investment significantly reduced travel times, bolstered economic activity around station hubs, and facilitated regional development by enabling urban decentralization. This paper explores the long-term economic benefits of high-speed rail, including its impact on land value, business expansion, and carbon emissions. The case study of the Linear Chuo Shinkansen, Japan's latest maglev project, underscores both the economic promise and the political resistance to expansion, particularly in regions such as Shizuoka.

Using …