Transportation Commons^™

Navigating The Balance Between Cost And Efficiency : Examining International Ship And Port Facility Security (Isps) Code Compliance Challenges For Nigerian Port Operators, Desmond Eluemuno Nwoko

World Maritime University Dissertations

No abstract provided.

Blue Bird: Building The Right Path, Yuanto Kusnadi, Wee Kiat Lim

Research Collection School Of Accountancy

How Indonesia's leading mobility provider pursued twin transformations involving sustainable growth and digitalisation.

Broadening Workforce Participation In Transportation: Challenges And Strategies, Jodi Godfrey, Stephanie Ivey

Mineta Transportation Institute

Attracting and retaining a diverse, skilled workforce remains one of the most pressing challenges in the transportation industry. A new MTI-led California State University Transportation Consortium report examines why workforce participation gaps persist and identifies practical strategies organizations can implement to address them. Drawing on an extensive literature review, a nationwide industry survey with 996 respondents, and in-depth interviews with 15 transportation professionals, the study highlights both the barriers and the solutions to workforce participation. The findings emphasize that open dialogue, intentional investment, and inclusive workplace policies can help transform industry culture, making transportation careers more appealing to a broader …

Information Strategies In The Electric Vehicles Battery Reverse Supply Chain With Blockchain Technology, Tianqin Shi, Yanting Huang

Mineta Transportation Institute

The surge in demand for electric vehicles (EV) and EV batteries, coupled with supply chain vulnerabilities and price instability, has driven the need for efficient and sustainable EV battery recycling processes. This report investigates the potential of blockchain technology to address the challenges in the EV battery reverse supply chain (moving goods from the end customer back towards the manufacturer), focusing on enhancing transparency and coordination, as well as mitigating the impact of unregulated recycling. Key stakeholders in this analysis include manufacturers, recyclers, and regulatory bodies. To achieve these objectives, the study employs a mixed-methods approach. It includes semi-structured interviews …

Reducing Motor Vehicle – Bicycle Conflicts At Controlled Intersections, Jason C. Anderson, Sirisha Kothuri

PSU Transportation Seminars

One of the most common locations for fatal motor vehicle-bicyclist crashes is at intersections, which inherently have a large number of turning conflicts. Reducing these conflicts is a key objective in improving intersection safety across all modes. Of particular concern for bicyclists’ safety at intersections are the conflicts between straight-through bicyclists and motor vehicle right-turns and opposing left-turns. The objective of this research was to develop guidance and tools for transportation practitioners to use to reduce turning conflicts between motor vehicles and bicycles at controlled intersections and improve the safety and comfort of intersections for bicyclists.

Fresno’S Scribbles Bike Path: A Master Plan For Active Transportation, Holly Sowles, Uris Giron

Mineta Transportation Institute

The Fresno Scribbles Bike Path Master Plan, which represents a commitment to equitable active transportation and social infrastructure, is designed to enhance the quality of life for Fresno residents by providing safe, comfortable, and accessible biking and walking paths while promoting sustainability and fostering a sense of community. This report details the Intelligent Design Visualization Lab’s (IDVL) ongoing contribution to the Fresno City Scribbles Bike Campus initiative. This multifaceted urban intervention seeks to promote bike and pedestrian safety, enhance environmental resilience, and active transportation infrastructure through design, serving as a form of placemaking. In collaboration with the Fresno State Transportation …

Use Of Polymer Fiber To Improve Mechanical Properties Of Hma Containing Recycled Asphalt Pavement (Rap), Ashraf Rahim, Shadi Saadeh, Hani Al Zaraiee

Mineta Transportation Institute

A great percentage of highways and roads in California are constructed with Hot Mix Asphalt (HMA), and, as California infrastructure ages, these highways and roads must be maintained and rehabilitated. Reclaimed Asphalt Pavement (RAP) is considered an excellent alternative to virgin (raw, unprocessed) materials because it reduces the use of virgin aggregate and binder. Also, the use of RAP decreases the amount of construction waste placed into landfills. This laboratory study investigated the effect of two different commercial polymer fibers on the mechanical properties of HMA with RAP. Three different HMA with RAP mixes were used in the study. One …

The Realities Of Roadkill: Challenges And Opportunities For Wildlife Transportation Mitigation, Rachel Wheat

PSU Transportation Seminars

Transportation infrastructure is critical for our communities and economies, but the roadways we depend on for travel have significant negative impacts on wildlife populations. Roadkill is the most visible consequence, with tens of millions of animals injured or killed on Oregon’s roadways each year. Beyond direct mortality, transportation corridors fragment habitat and can alter wildlife behavior, creating barriers that disrupt wildlife movement and access to critical resources, contributing to population declines. Despite these challenges, opportunities exist for mitigation, including the use of wildlife crossing structures, autonomous animal detection systems, and smarter project siting. This talk will explore the multifaceted challenges …

Transit-Oriented Development And Affordable Housing: Lessons From Portland, Nathan Mcneil

PSU Transportation Seminars

The seminar will cover surveys of residents at recently built Transit-Oriented Developments (TODs) focused on affordable housing sites. This study builds off of an ongoing partnership between Portland State University and the Portland Metro regional government to understand the travel choices of people who move to recently constructed Metro supported TODs. Since 2018, Metro has focused their TOD investment on affordable housing; this survey, conducted in 2024, offers a lens into how TOD works for these low-income Portlanders, how their travel differs from prior TOD residents, and what opportunities exist to improve the TOD - affordable housing combination.

Walk Portland: A Downtown Pedestrian Wayfinding Strategy And Pilot, Gena Gastaldi, Gwen Sullivan, Ryan Sullivan

PSU Transportation Seminars

Walk Portland, a partnership between the Portland Bureau of Transportation (PBOT) and Travel Portland, seeks to make it easier than ever for pedestrians to explore the city. In 2024, PBOT and Travel Portland, in partnership with sparks+sullivan, teamed up to develop a wayfinding strategic plan. In 2025, with grant funding from Travel Oregon, the team launched a short-term pilot wayfinding system to help people explore Portland as a pedestrian: the Downtown Portland Walking Route. The pilot, up from August-October 2025, is designed to see what works and what doesn’t in helping people navigate downtown. The long-term goal of this project …

Hlcg: A Hierarchical Lane-Changing Gaming Decision Model For Heterogeneous Traffic Flow On Two-Lane Highways, Tianyi Wang, Chong He, Hao Li, Yixuan Li, Yiming Xu, Yangyang Wang, Junfeng Jiao

Research Collection College of Integrative Studies

Discretionary lane-changing behavior is one of the most common highway operations, which seriously affects traffic efficiency and safety. Nowadays, connected and automated vehicles (CAVs) are advancing rapidly, though not yet fully widespread. As a result, a mixed traffic environment with traditional human-driven vehicles (HDVs) and CAVs will persist for the foreseeable future. To achieve effective automatic lane-changing maneuvers, it’s necessary to propose a lane-changing decision model for heterogeneous traffic flow on two-lane highways. This paper firstly extends longitudinal car-following models based on the intelligent driver model and lateral lane-changing models using quintic polynomial curves to accommodate heterogeneous traffic flow, and …

Frameworks And Life Cycle Assessment For Reinforced Concrete Bridges For Sustainability In Transportation, Yu-Fu Ko, Jessica Gonzalez

Mineta Transportation Institute

Bridge structures are critical components of California’s transportation network, with reinforced concrete (RC) bridges being among the most widely used. Extending the lifespan of these structures can lead to significant reductions in environmental impacts. However, California’s frequent seismic activity has repeatedly exposed the vulnerability of existing RC bridges, highlighting the urgent need for seismic retrofitting and maintenance to improve infrastructure resilience against earthquakes and to increase sustainability. This research used detailed computer simulations known as nonlinear finite element models, which are highly detailed computer models, incorporating section damage indices to predict damage and assess structural deficiencies in RC bridges during …

A Holistic Inquiry Of Intelligent Speed-Assist Technology: Safety Impacts, Technology Implementation, And Challenges, Sahar Ghanipoor Machiani, Nusheen Baradaran, Arash Jahangiri

Mineta Transportation Institute

Speeding is a leading contributor to roadway fatalities in the United States, and California consistently ranks among states with the highest number of speed-related crashes. Intelligent Speed Assistance (ISA) technology has emerged as a solution aimed at mitigating this issue by notifying drivers of speed limits and, in some cases, intervening and lowering the speed to the posted speed limit. This work presents a comprehensive investigation into ISA system safety benefits, implementation challenges, and public perception, with a focus on California drivers. This study utilized a multi-method approach. A literature review explores the history, regulatory barriers, and international trails of …

Best Practices In Marketing And Creative Outreach For New Transportation Technologies, William Riggs, Caillou Dasalla, Cayden Rooney, Vaasu Bhartia

Mineta Transportation Institute

Emerging transportation technologies—including electric vehicles (EVs), micromobility solutions, autonomous vehicles (AVs), hyperloop systems, and mobility-as-a-service (MaaS) platforms—are rapidly reshaping mobility patterns and urban environments. As these innovations gain traction, it becomes increasingly important to address concerns, communicate advantages, and foster trust across communities. This project examines marketing best practices for promoting emerging mobility solutions, synthesizing insights from scholarly research, industry standards, and case studies of successful campaigns. Emphasis is placed on the shift toward “snackable,” visually engaging content delivered through widely used social media platforms such as TikTok, Instagram, and Snapchat, which are increasingly central to reaching diverse audiences. The …

Large Lithium-Ion Battery Model For Secure Shared E-Bike Battery In Smart Cities, Donghui Ding, Zhao Li, Linhao Luo, Ming Jin, Bin Zhu, Yichen Zhong, Junhao Hu, Peng Cai, Huiqi Hu

Research Collection School Of Computing and Information Systems

Electric bikes powered by lithium-ion batteries are increasingly used in smart cities to promote sustainable mobility and efficient delivery services. However, limited battery range and slow plug-in charging remain key challenges. Shared electric bike battery systems, facilitated by battery swapping stations, offer a promising solution by enabling quick and efficient battery replacements. However, their success hinges on accurate anomaly detection, battery health estimation and remain range prediction. These tasks remain challenging due to data scarcity, battery diversity and environmental variability. Here we show that a large-scale lithium-ion battery model trained on over ten million battery time series data enables robust …

Development Of An Access Charge Framework For High-Speed Rail Incorporating Rail Replacement Costs And Dynamic Train Characteristics, Nitesh Kumar Yadav

UNLV Theses, Dissertations, Professional Papers, and Capstones

This thesis develops a framework to determine track access charges for shared high-speed rail corridors, with a focus on rail replacement cost driven by train-induced loads. The method explicitly accounts for both static loads, resulting from axle weights, and dynamic loads that arise from train speed and track geometry, particularly curvature. Train characteristics such as axle load, operating speed, frequency of service, and number of wheels are integrated with track parameters, including curve radius, to calculate the total vertical load. These loads are used to estimate the cumulative tonnage threshold for rail replacement and the resulting service life of the …

Resilience Of Interdependent Transportation And Healthcare Systems: A Simulation-Driven Framework Incorporating Social Equity And Facility Optimization, S. Yasaman Ahmadi

Dissertations and Doctoral Documents, University of Nebraska-Lincoln, 2023–

The overarching goal of this dissertation is to develop an integrated, simulation-driven framework to assess and enhance the resilience of interdependent transportation and healthcare systems before, during, and after natural hazards. By examining how spatial disruptions, social vulnerability, operational constraints, and infrastructure interdependencies affect access to and functionality of hospitals, this research offers a multifaceted evaluation of system performance under stress. This dissertation examines the impact of natural hazards, particularly floods, on the interdependent transportation and healthcare systems. The proposed approach combines and advances GIS-based network analysis, graph-theoretical modeling, and discrete-event simulation to evaluate system performance under different scenarios. The …

Exploring Commuter Cyclists' Experiences Commuting In And Around Clemson University, Trevor S. Romans

All Theses

Climate change is a global issue, and high rates of automobile usage contribute to substantial social, environmental, and economic issues. One potential partial solution is creating bicycle-friendly communities. Research suggests that bicycle use leads to benefits in physical health, environmental sustainability, economic savings, and social justice. Research supports the roles of infrastructure development, safety policies, and other transportation planning initiatives in increasing bicycling, but less research has been completed about what is needed to develop bicycle-friendly communities. While physical infrastructure affects willingness to commute by bicycle, research suggests that understanding psychological factors and other behavioral aspects is also important for …

Constructing A State: Canals And The Transformation Of The Economy, Politics, And Finance In Nineteenth-Century New York, Youwei Xing

All Dissertations

This dissertation consists of three essays in economic history, unified by a focus on one of America's earliest transportation infrastructures, the canal system, in nineteenth-century New York. Each chapter explores a different aspect of the state's transformation: its economy, politics, and finance, each of which helped construct New York as the Empire State.

The first chapter studies the economic impact of canals on economic modernization from three aspects: sectoral transition, urbanization, and banking development. Contrary to much of the modern literature finds transportation infrastructure leads to decentralization, I find the opposite-evidence of centralization. Specially: (1) canal towns experienced a transition …

Evaluating Demand-Responsive Scheduling In Public Transportation Service Offerings To Retirement Communities, Steven D. Silver

Mineta Transportation Institute

This project addresses alternatives to fixed schedule local transportation service offerings to members of retirement communities. The project design measures the effects of the contrast between fixed schedule (Fixed) service and demand-responsive services (DRT) in retirement communities in Santa Clara County that are closely matched in demographic profiles and geographic location. The research team investigates the effects of scheduling alternatives in a diary format with a within-person variable of four recent trips. The measure of public transportation usage under the Fixed schedule and DRT service offerings is supplemented by a measure of subjective well-being (STS) for each trip—in other words, …