Transportation Commons^™

Understanding Residential Development In A High-Quality Transit Area (Hqta): An Application Of Deep Learning, Dohyung Kim

Mineta Transportation Institute

Considerable research addresses the dynamics between land use and public transportation, including the impacts of transit systems on urban development and vice versa. However, this research has underestimated the heterogeneity of contributing factors to urban developments near transit by property type: vacant lot and occupied property. That is, what drives development in vacant lots differs from what drives development in already-occupied property. A lack of comprehensive data that differentiates development records based on the type of property is one explanation for this research gap. This project fills this research gap by employing a deep learning algorithm and separately examining the …

Developing An Integrated Risk Assessment Framework To Quantify The Resilience Of Critical Railway Infrastructure: Characterization Of Risks And Hazards To The U.S. Rail Network Through Empirical Data And Past Events, Haizhong Wang, Brian M. Staes, Benyamin Ghoreishi

Mineta Transportation Institute

To improve understanding of the impact of natural hazards on the U.S. railway system, this project developed a comprehensive, geospatially precise dataset that maps historical hazard events to specific rail segments. The project provides insight into when, where, and how much damage natural hazards have inflicted on rail infrastructure across the country. While a rail-specific hazard database did not previously exist, this research combines data from the Geological Survey (USGS) Flood Events Database, Hydrologic Unit Codes (HUC), the National Centers for Environmental Information (NCEI) from the National Oceanic and Atmospheric Administration (NOAA), and the National Weather Service (NWS) forecast zones. …

Roadside Asset Extraction From Mobile Lidar Point Cloud, Yushin Ahn, Riadh Munjy, Stephen Choi

Mineta Transportation Institute

Mobile LiDAR systems are powerful tools that help us map roads and their surroundings in 3D with great speed and precision. The data provided by these systems support urban planning efforts, digital mapping, transportation infrastructure maintenance, and more. This report presents a comprehensive workflow for roadside asset extraction using Mobile Terrestrial Laser Scanning (MTLS) data, focusing on road lane detection, cross-section slope analysis, and point cloud classification. Roadside asset extraction is the identification and classification of roadside features like signs and poles. The dataset, acquired using a high-resolution mobile LiDAR system, contains over 5.7 billion points (pieces of data) across …

Application Of Distributed Fiber Optic Sensing (Dfos) For Monitoring Asphalt Pavement Strains Under Accelerated Loading Conditions, Sebastian Morales

Open Access Theses & Dissertations

This thesis presents a study on the application of Distributed Fiber Optic Sensing (DFOS) technology for detecting pavement's strain response with high spatial resolution. Using a Rayleigh-based optical frequency domain reflectometry (OFDR) system, DFOS sensors were calibrated and embedded in full-scale asphalt slabs subjected to accelerated loading using a Model Mobile Load Simulator 3 (MMLS3). Calibration of the DFOS sensors was conducted using a three-point bending flexural test with known load conditions and reference strain gauges to validate theoretical and numerical models. The results demonstrate DFOS's capability to detect pavement response under static and dynamic loading, as well as changes …

An Ambient Nox Reduction Reactor System With And Without Forced Air, Hamid Rahai, Rylan Moffit, Komal Gada, Jeremy Bonifacio

Mineta Transportation Institute

Ambient nitrogen oxide (NOX) is one of the main ingredients involved in the formation of ground-level ozone (smog), which contributes to global warming and the formation of particulates in the atmosphere and causes respiratory illnesses, especially in children, older adults, and people with lung diseases. Investigations on adding titanium dioxide (TiO2) nanoparticles to the paint used on concrete surfaces such as buildings and its potential in reducing ambient NOX concentration have provided opportunities for the research and development of methods for passive control and filtration of the ambient NOX. The present research used numerical geometrical optimization to identify an optimized …

Hydrogen Fuel Cell Application For Port Drayage Truck: Integrated Transportation And Energy Modeling, Shams Tanvir, Emu Ghosh

Mineta Transportation Institute

This report investigates the viability of hydrogen Fuel Cell Electric Vehicles (FCEVs) for port drayage applications, focusing on both energy modeling and economic feasibility. Port drayage—trucking operations that move goods a short distance to and from ports—is a key part of freight logistics and the critical movement of goods in American communities. This project developed a microscopic energy consumption model using second-by-second activity data from 38 Class 8 diesel drayage trucks operating in Southern California. The model emulated FCEV operations and determined an average hydrogen fuel consumption of 0.15 kg/mile across 749 trips. This data informed a levelized cost of …

Assessing Vulnerabilities Associated With High-Risk Dams In Utah, Courtney Flint Dr., Michael Englert, Upmanu Lall Dr.

I-GUIDE Forum

Across the United States, the age of dam infrastructure presents a substantial threat. The potential for structural failure associated with these aging dams is exacerbated by increased climate uncertainty and the threat of dam overtopping due to extreme and prolonged precipitation events. These compound threats place downstream areas at pronounced risk. These downstream areas vary widely. Some are relatively free of vulnerable elements, while others have a complex mix of infrastructure, populations, and ecologically important elements. This paper highlights the risk situation associated with aging dams and hydroclimatic extremes, the methodological and geospatial challenges and opportunities associated with mapping the …

Changing Minds, Changing Modes: Optimizing Public Perception Strategies For Urban Cycling Through Behavior Change Theory, Brandon Barnhart

University Honors Theses

This thesis addresses the recent decline in bicycle mode share in cities like Portland, Oregon, despite decades of investment in cycling infrastructure. While the "build it, and they will come" approach succeeded through the early 2000s, it no longer meets targets for bicycle use or broader goals related to sustainability, congestion, health, and safety. A new approach is needed that effectively rebuilds the cultural and behavioral components of cycling. This research asks: What role can behavior change theory play in increasing the effectiveness of public perception campaigns to promote urban cycling? Using a qualitative methodology, this study draws on behavior …

Developing Indicators For Comprehensive Evaluation Of Equity In Transportation Systems, Ruqaya Emad Alfaris

Theses and Dissertations

Achieving transportation equity is essential for social inclusion, access to opportunities, and reducing disparities. However, traditional evaluation methods are often fragmented and fail to capture equity’s multidimensional nature. This dissertation develops a comprehensive framework for creating indicators to evaluate transportation equity effectively. It begins with a literature review to comprehend the theoretical background, followed by expert interviews highlight gaps in current evaluation practices. Statistical modeling and machine learning analysis was conducted to first explore indicators’ impact on transportation equity, and then investigate transportation safety disparities in underserved communities. Findings from literature review, interview with professionals, and analysis results are used …

Is Ride-Hailing A Potential Solution For Older Adults After Driving Cessation? The Role Of Objective And Perceived Accessibility, Minju Kim Song

Dissertations and Theses

Due to age-related physical and cognitive changes, older drivers have a greater risk of crashes and are restricted by age-dependent regulation. Nonetheless, many older adults in the United States maintain a car-dependent lifestyle and still prefer driving. When driving cessation or reduction becomes necessary, a primary concern is finding suitable alternative transportation modes. However, the availability of alternative transportation modes does not guarantee their actual use of these options.

As a relatively new transportation mode, ride-hailing services, such as Uber and Lyft, offer on-demand, door-to-door transportation and may be a feasible transportation solution for older adults who stop driving. While …

The Benefits And Pitfalls Of Public Private Partnerships: Case Study Of The Suez Canal Container Terminal, Egypt, Magda Elswesy

Theses and Dissertations

The study explores the public-private partnerships (PPPs) in constructing, managing, and operating container terminals in Egypt. It examines the benefits the public sector gains from such collaborations and the pitfalls that can be mitigated to foster more effective institutional cooperation. The study specifically focuses on enhancing Egypt's marine container terminals through these partnerships, emphasizing the potential use of growing technology to enable equipment automation. It also highlights concerns regarding the risk of mismanagement of Egyptian terminals, arising from insufficient expected volume to ensure appropriate profitability, especially with the opening of new terminals. The study adopts a qualitative methodology and presents …

Addressing Urban Traffic Congestion: A Deep Reinforcement Learning-Based Approach, Tairan Liu

Mineta Transportation Institute

In an innovative venture, the research team embarked on a mission to redefine urban traffic flow by introducing an automated way to manage traffic light timings. This project integrates two critical technologies, Deep Q-Networks (DQN) and Auto-encoders, into reinforcement learning, with the goal of making traffic smoother and reducing the all-too-common road congestion in simulated city environments. Deep Q-Networks (DQN) are a form of reinforcement learning algorithms that learns the best actions to take in various situations through trial and error. Auto-encoders, on the other hand, are tools that help simplify complex data, making it easier for the DQN to …

Built Environment And Public Electric Vehicle Charging: An Investigation Using Poi Data And Computer Vision, Junfeng Jiao, Seung Jun Choi

Research Collection College of Integrative Studies

Public electric vehicle charging stations (EVCSs) are vital for boosting EV adoption. This study investigates Seoul’s public EV charging patterns, taking into account the surrounding urban built environment. We collected built-environment data from land-use maps, Point of Interest (POI) data, and panorama images near public EVCS. The computer-vision technique was used to extract scene features from panorama images. We conducted a spatiotemporal analysis of public EVCS usage. The built-environment factors underwent dimensionality reduction and were assessed for outliers. Descriptive analysis revealed afternoon peak charging times and variations between chargers. Additional peaks are observed in the weekday late evening for chargers …

Strategized Reduction Of Greenhouse Gas Emissions Through Predicting And Extending The Service Life Of Concrete Pavements And Bridges, Fariborz M. Tehrani

Mineta Transportation Institute

Strong, durable concrete is key to resilient, long-lasting transportation infrastructure—especially in the face of climate change. This project explores innovative strategies for predicting and enhancing the service life of concrete in pavement and bridge systems, addressing the pressing need for sustainable transportation infrastructure. As concrete is pivotal to the durability and resilience of such structures, its environmental impact demands urgent attention. This project aims to reduce greenhouse gas emissions throughout their lifecycle by extending the service life of concrete pavements and bridge decks. A significant focus of the research is on the indications of chloride ion penetration in concrete, which …

The Management Of The Bus Rapid Transit (Brt) System And Its Impact On Mobility In Lagos State, Nigeria, Olukayode Lasisi, Mayowa Paul Obembe, Leke Kayode Onabanjo, Tolulope Oluwatosin Bamiro, Oluwatobee Omowumi Iyiola

BISNIS & BIROKRASI: Jurnal Ilmu Administrasi dan Organisasi

Lagos is famous for its high traffic congestion and insufficient road infrastructure. This study examined the effect of BRT management and its influence on mobility in Lagos State. The study adopted a cross-sectional design involving data gathering through the primary data collection method using a closed-ended questionnaire purposively administered to 100 commuters of BRT buses in Lagos. The findings revealed a high positive relationship between managing the BRT system and mobility in Lagos State. Additionally, the findings indicate a robust and positive causal relationship between Lagos State’s BRT system and transportation development. The BRT system contributes to improving transportation infrastructure …

Pedaling Toward Justice: Exploring The Role Of Community Advocacy In Shaping Bicycle Policy In Oakland., Claire Farrell Lowe

Master's Projects and Capstones

The way people move through a city fundamentally shapes their access to jobs, essential services, and economic and social opportunities. While Oakland’s bicycle infrastructure has improved over the past decade, vehicle-centric planning has historically sidelined cycling, creating mobility inequities. This thesis examines the role of community advocacy in advancing equitable bicycle planning and prioritizing cycling infrastructure as a core element of urban development. This thesis project follows the question: what role do advocacy groups play in addressing the gaps between the Oakland Bicycle Plan and its implementation? Through policy analysis, community engagement, and interviews with key informants from Bike East …

Assessing The Recall Of Traffic Safety Campaigns In Arkansas, Pratik Babu Pokharel

Graduate Theses and Dissertations

This study estimates the degree to which drivers recall traffic safety campaigns based on sociodemographic characteristics including driving frequency, vehicle type, education, income, age, household composition, race, and gender. Traffic safety campaigns are efforts to educate, persuade, and inspire individuals to adjust their attitudes and behaviors for improved road safety, utilizing planned communications over a set time period. They aim to encourage safe driving using slogans shown on television, radio, social media, billboards, and variable message signs. Two years of a mail-based survey conducted in Arkansas were used to estimate binary logistic regression models for each of four safety campaigns. …

Impact Of Various Sealant Materials On Low Temperature Properties Of Asphalt Mixtures, Jackson Hedden

Graduate Theses and Dissertations

In the United States, 43% of the pavement network is in poor condition which can be attributed primarily to different modes of cracking. This network is constantly exposed to the elements and loading leading to thermal and fatigue cracking respectively. Cracking can be addressed through two primary means: mix design and preservation through the application of treatments. However, evaluating these two avenues requires a test that can easily and effectively measure the influence of these factors on thermal and fatigue cracking performance. The two main objectives of this study were to explore the influence of non-standard treatment material (sealant material) …

Stop Design: Rethinking The Approach To Public Transit's Architecture, Elizabeth M. Nielsen

Architecture Masters of Science Program: Theses

Public spaces are the foundation of our social health and wellbeing, but are often designed without considering the needs of the public, creating spaces that people do not feel encouraged to use. Just as public space design as a whole often falls short of serving the public, the same can be said for a subset of public space design, public transit stops. While they are public spaces created for the purpose of waiting, their design rarely reflects this.

Well-designed public transit stops are capable of both maintaining existing ridership and drawing in new riders. Most commonly, this design occurs at …

Quality Considerations In The Pedestrian Realm: Dead Space Intervention And Prevention, Alycia Ramage

Masters in Architecture Program: Theses

What if every space deemed “unadmirable” was reimagined as a stage for community life? Efforts to find solutions to this question prompted a more complex question: how can new construction promote interaction between architecture and the pedestrian realm?

This thesis is conducted in three main parts: 1) understanding dead space, 2) reinventing dead spaces in existing conditions, and 3) creating a design handbook that works to minimize dead spaces in new design.

Using Lincoln, Nebraska as a case study, part one begins with observation- looking for spaces that could be deemed unadmirable by a pedestrian. Utilizing research and observation, the …