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Graduate Theses and Dissertations

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Factors Explaining Changes In Household Vehicle Miles Of Travel, Richard Driscoll Oct 2018

Factors Explaining Changes In Household Vehicle Miles Of Travel, Richard Driscoll

Graduate Theses and Dissertations

Vehicle miles of travel (VMT) is a key indicator of travel demand in the United States. Since 1995 total VMT and VMT per capita has fluctuated, with notable declines in the late 2000s and accelerated increases in the last 7 years. Since 1995, the National Household Travel Survey (NHTS) has tracked the household share of total VMT to shed light on the demographic and behavioral data behind personal vehicle travel. The household share of VMT, while still a majority, has declined every NHTS year since at least 1995. Meanwhile, household VMT has stagnated around 2.25 trillion miles since the ...


Connected Autonomous Vehicles: Capacity Analysis, Trajectory Optimization, And Speed Harmonization, Amir Ghiasi Jul 2018

Connected Autonomous Vehicles: Capacity Analysis, Trajectory Optimization, And Speed Harmonization, Amir Ghiasi

Graduate Theses and Dissertations

Emerging connected and autonomous vehicle technologies (CAV) provide an opportunity to improve highway capacity and reduce adverse impacts of stop-and-go traffic. To realize the potential benefits of CAV technologies, this study provides insightful methodological and managerial tools in microscopic and macroscopic traffic scales. In the macroscopic scale, this dissertation proposes an analytical method to formulate highway capacity for a mixed traffic environment where a portion of vehicles are CAVs and the remaining are human-driven vehicles (HVs). The proposed analytical mixed traffic highway capacity model is based on a Markov chain representation of spatial distribution of heterogeneous and stochastic headways. This ...


Heavy Vehicle Classification Analysis Using Length-Based Vehicle Count And Speed Data, Eren Yuksel Jun 2018

Heavy Vehicle Classification Analysis Using Length-Based Vehicle Count And Speed Data, Eren Yuksel

Graduate Theses and Dissertations

There is an increasing demand for application of Intelligent Transportation Systems (ITS) in order to make highways safer and sustainable. Collecting and analyzing traffic stream data are the most important parameters in transportation engineering in enhancing our understanding of traffic congestion and mobility. Classification of the vehicles using traffic data is one of the most essential parameters for traffic management. Of particular interest are heavy vehicles which impact traffic mobility due to their lack of maneuverability and slower speeds. The impact of heavy vehicles on the traffic stream results in congestion and reduction of road efficiency. In this paper, length-based ...


Understanding The Effects Of Demographic And Socio-Economic Factors On Public Transit Ridership Trends, Kurt Lehmann Mar 2018

Understanding The Effects Of Demographic And Socio-Economic Factors On Public Transit Ridership Trends, Kurt Lehmann

Graduate Theses and Dissertations

Public transit, an important mobility service for many, has incurred ridership decline in the U.S. for the past three years. In 2014, U.S. transit ridership was 10.74 billion unlinked passenger trips. In 2015, total ridership was 1.0 percent fewer, and the 2016 decrease was 2.2 percent from 2015. The consistent abandonment of transit in the U.S. does not seem to be ending. In 2017, ridership predicted from year-to-date data is 2.4 percent less than 2016. Furthermore, per capita ridership has decreased 17 percent since 1980. Both the short-term ridership trend and long-term per ...


Understanding The Linkages Between Urban Transportation Design And Population Exposure To Traffic-Related Air Pollution: Application Of An Integrated Transportation And Air Pollution Modeling Framework To Tampa, Fl, Sashikanth Gurram Nov 2017

Understanding The Linkages Between Urban Transportation Design And Population Exposure To Traffic-Related Air Pollution: Application Of An Integrated Transportation And Air Pollution Modeling Framework To Tampa, Fl, Sashikanth Gurram

Graduate Theses and Dissertations

Rapid and unplanned urbanization has ushered in a variety of public health challenges, including exposure to traffic pollution and greater dependence on automobiles. Moreover, vulnerable population groups often bear the brunt of negative outcomes and are subject to disproportionate exposure and health effects. This makes it imperative for urban transportation engineers, land use planners, and public health professionals to work synergistically to understand both the relationship between urban design and population exposure to traffic pollution, and its social distribution. Researchers have started to pay close attention to this connection, mainly by conducting observational studies on the relationship between transportation, urban ...


Improving Service Level Of Free-Floating Bike Sharing Systems, Aritra Pal Nov 2017

Improving Service Level Of Free-Floating Bike Sharing Systems, Aritra Pal

Graduate Theses and Dissertations

Bike Sharing is a sustainable mode of urban mobility, not only for regular commuters but also for casual users and tourists. Free-floating bike sharing (FFBS) is an innovative bike sharing model, which saves on start-up cost, prevents bike theft, and offers significant opportunities for smart management by tracking bikes in real-time with built-in GPS. Efficient management of a FFBS requires: 1) analyzing its mobility patterns and spatio-temporal imbalance of supply and demand of bikes, 2) developing strategies to mitigate such imbalances, and 3) understanding the causes of a bike getting damaged and developing strategies to minimize them. All of these ...


Comprehensive Exploratory Analysis Of Truck Route Choice Diversity In Florida, Trang D. Luong Nov 2017

Comprehensive Exploratory Analysis Of Truck Route Choice Diversity In Florida, Trang D. Luong

Graduate Theses and Dissertations

This thesis presents a comprehensive exploratory analysis of truck route choice diversity in the state of Florida, for both long-haul and short-haul truck travel segments. We employ six metrics to measure three different dimensions of diversity in truck route choice between any given origin-destination (OD) pair. These dimensions are: (1) number of distinct routes used to travel between the OD pair, (2) the extent of overlap (or lack thereof) among the routes, and (3) the evenness (or the dominance) of the usage of different unique routes. The diversity metrics were utilized to examine truck route choice diversity from over 73 ...


How Transportation Network Companies Could Replace Public Transportation In The United States, Matthew L. Kessler Nov 2017

How Transportation Network Companies Could Replace Public Transportation In The United States, Matthew L. Kessler

Graduate Theses and Dissertations

The quantity of cell phone applications or mobile apps have seen an upsurge at an exponential rate in under a decade. Many have been created for a variety of industries, including transportation. The advent and subsequent commercialized implementation of near-instant transport by a middleman-type of app is now known as a Transportation Network Company or TNC. Examples of the more renowned TNCs are Uber, Lyft and Sidecar.

In recent years, TNCs have cultivated a tremendous following, to the degree of taxicab desertion. Moreover, the massive success of TNCs led to expansion of its capacities into public transportation.

The TNC’s ...


Autonomous Vehicles: An Empirical Assessment Of Consumers’ Perceptions, Intended Adoption, And Impacts On Household Vehicle Ownership, Nikhil Menon Jul 2017

Autonomous Vehicles: An Empirical Assessment Of Consumers’ Perceptions, Intended Adoption, And Impacts On Household Vehicle Ownership, Nikhil Menon

Graduate Theses and Dissertations

Emerging automotive and transportation technologies have provided revolutionary possibilities in the way we might travel in the future. Major car manufacturers and technology giants have demonstrated significant progress in advancing and testing autonomous vehicles in real-life traffic conditions. Governmental agencies are grappling with how to plan transportation systems for a world with autonomous vehicles. Past research has shown that not all technologies are immediately welcomed by the public. Autonomous Vehicles would have to likely go through a similar phase, and would need to overcome not just technological challenges but also social barriers for successful penetration into the marketplace. Most previous ...


Reappropriating Public Space In Nanchang, China: A Study Of Informal Street Vendors, Bryan C. Winter Jul 2017

Reappropriating Public Space In Nanchang, China: A Study Of Informal Street Vendors, Bryan C. Winter

Graduate Theses and Dissertations

Since China's shift to market socialism, many marginalized by this process work as informal street vendors where they reappropriate public space in order to survive―a practice at odds with urban authorities' modernizing agenda. In relation to these competing logics concerning public space's use value versus its exchange value, this dissertation examines the practices, experiences, and agency of informal street vendors working in Sanjingwuwei, an ordinary, yet rapidly gentrifying, neighborhood of Nanchang, capital and largest city of southeastern China's Jiangxi Province. After describing the growth of an informal economy in modern China and providing a history of ...


Space-Time Transportation System Modelling: From Traveler’S Characteristics To The Network Design Problem, Mohsen Parsafard Jun 2017

Space-Time Transportation System Modelling: From Traveler’S Characteristics To The Network Design Problem, Mohsen Parsafard

Graduate Theses and Dissertations

Traditional network design problems only consider the long-term stationary travel patterns (e.g., fixed OD demand) and short-term variations of human mobility are ignored. This study aims to integrate human mobility characteristics and travel patterns into network design problems using a space-time network structure. Emerging technologies such as location-based social network platforms provide a unique opportunity for understanding human mobility patterns that can lead to advanced modeling techniques. To reach our goal, at first multimodal network design problems are investigated by considering safety and flow interactions between different modes of transport. We develop a network reconstruction method to expand a ...


Architecture Of Care In The Urban Public Space: A Philosophical Inquiry In ‘Ethics Of Care’ To Inform The Nature Of The Urban Public Space, Rucha Vivek Newalkar Jan 2017

Architecture Of Care In The Urban Public Space: A Philosophical Inquiry In ‘Ethics Of Care’ To Inform The Nature Of The Urban Public Space, Rucha Vivek Newalkar

Graduate Theses and Dissertations

Within any urban setting, the public space has always reflected the city’s social, economic, cultural, and environmental well-being. In the broader discussion of urban environmental sustainability, however, there has been a pronounced dualism and an implicit hierarchy of value when looking at the city-ecology paradigm. This corresponds to the political-social, human- nature and especially subject-object divides within the perspectives on the sustainability of urban public spaces. I associate this divide and the subsequent domination of pedagogies that lack feminist approaches in analyzing qualitative aspects like experience, well-being, and equity. Do public spaces belong to women and nature? Do women ...


Locally Optimized Mapping Of Slum Conditions In A Sub-Saharan Context: A Case Study Of Bamenda, Cameroon, Julius Anchang Nov 2016

Locally Optimized Mapping Of Slum Conditions In A Sub-Saharan Context: A Case Study Of Bamenda, Cameroon, Julius Anchang

Graduate Theses and Dissertations

Despite being an indicator of modernization and macro-economic growth, urbanization in regions such as Sub-Saharan Africa is tightly interwoven with poverty and deprivation. This has manifested physically as slums, which represent the worst residential urban areas, marked by lack of access to good quality housing and basic services. To effectively combat the slum phenomenon, local slum conditions must be captured in quantitative and spatial terms. However, there are significant hurdles to this. Slum detection and mapping requires readily available and reliable data, as well as a proper conceptualization of measurement and scale. Using Bamenda, Cameroon, as a test case, this ...


The Effects Of Age And Gender On Pedestrian Traffic Injuries: A Random Parameters And Latent Class Analysis, Tatok Raharjo Raharjo Jun 2016

The Effects Of Age And Gender On Pedestrian Traffic Injuries: A Random Parameters And Latent Class Analysis, Tatok Raharjo Raharjo

Graduate Theses and Dissertations

Pedestrians are vulnerable road users because they do not have any protection while they walk. They are unlike cyclists and motorcyclists who often have at least helmet protection and sometimes additional body protection (in the case of motorcyclists with body-armored jackets and pants). In the US, pedestrian fatalities are increasing and becoming an ever larger proportion of overall roadway fatalities (NHTSA, 2016), thus underscoring the need to study factors that influence pedestrian-injury severity and potentially develop appropriate countermeasures. One of the critical elements in the study of pedestrian-injury severities is to understand how injuries vary across age and gender ‒ two ...


Assessing Property Value Impacts Of Access To Bus Rapid Transit (Brt): Case Study Of The Cleveland Healthline, Victoria A. Perk Apr 2016

Assessing Property Value Impacts Of Access To Bus Rapid Transit (Brt): Case Study Of The Cleveland Healthline, Victoria A. Perk

Graduate Theses and Dissertations

The nation’s economy depends heavily on mobility of goods and people. As communities look to improve mobility, many options can be considered, including roadway improvements, congestion-pricing options such as dynamic tolling and toll lanes, and public transit. Investment in public transit services can come in the form of increased and enhanced bus services, including bus rapid transit (BRT), as well as rail transit investments. As BRT continues to grow in popularity in the United States, a better understanding of the mode’s impacts on land uses and economic development is needed. One method of assessing the mode’s impacts ...


The Pursuit Of Happiness: The Shifting Narrative Of Suburbia And The American Dream, Kristen Ann Greteman Jan 2016

The Pursuit Of Happiness: The Shifting Narrative Of Suburbia And The American Dream, Kristen Ann Greteman

Graduate Theses and Dissertations

Suburbia and the American Dream have long, complex history in the United States. As the visual manifestation of the American Dream since the mid-twenty first century, suburbia has been criticized for being placeless, unhealthy, discriminatory, and wasteful. Alternative development methods have been created to combat the growth of suburban sprawl to create “places worth caring about” (Kunstler, 2007). This research study, through the methodology of oral history, uses in-depth interviews and morphological study to continue the narrative of suburbia and the American Dream as it exists in two alternative developments in Central Iowa: Prairie Trail in Ankeny and Glynn Village ...


A Theoretical And Methodological Framework To Analyze Long Distance Pleasure Travel, Vijayaraghavan Sivaraman Nov 2015

A Theoretical And Methodological Framework To Analyze Long Distance Pleasure Travel, Vijayaraghavan Sivaraman

Graduate Theses and Dissertations

The United States (US) witnessed remarkable growth in annual long distance travel over the past few decades. Over half of the long distance travel in the US is made for pleasure, including visiting friends and relatives (VFR) and leisure activities. This trend could continue with increased use of information and communication technologies for socialization, and enhanced mobility being achieved using fuel-efficient (electric/hybrid) and technology enhanced vehicles. Despite these developments, and recent interest to implement alternate mass transit options to serve this market, not much exists on the measurement, analysis and modeling of long distance pleasure travel in the U ...


Development Of Truck Route Choice Data Using Truck Gps, Mohammadreza Kamali Nov 2015

Development Of Truck Route Choice Data Using Truck Gps, Mohammadreza Kamali

Graduate Theses and Dissertations

Over the past few decades, the value and weight of freight shipments have grown steadily in both developed and developing countries. A recent statistic in the U.S. reveals that weight of shipments increased from 18,879 to 19,662 million tons between 2007 and 2012 (1). It is also expected that this amount will increase to 28,520 million tons by 2040 (1). It is worth mentioning that 67 percent of shipments are shipped by truck mode in 2012. The monetary value of freight is expected to escalate even faster than weight. This value is estimated to rise from ...


Consumer Perception And Anticipated Adoption Of Autonomous Vehicle Technology: Results From Multi-Population Surveys, Nikhil Menon Nov 2015

Consumer Perception And Anticipated Adoption Of Autonomous Vehicle Technology: Results From Multi-Population Surveys, Nikhil Menon

Graduate Theses and Dissertations

Emerging automotive and transportation technologies, such as autonomous vehicles (AVs) have created revolutionary possibilities in the way we might travel in the future. Major car manufacturers and technology giants have demonstrated significant progress in advancing and testing AV technologies in real-life traffic conditions.

Results from multi-population surveys indicate that despite enjoying moderate familiarity with AVs, more than 40% of the respondents were likely to use them when they become available. Simply looking at the demographic differences without paying any regard to the perceptions might suggest that the demographic differences are the primary causal factors behind the differences observed in the ...


Modeling Intrastate Air Travel: A Case Study Of The State Of Florida, Kai Liao Oct 2015

Modeling Intrastate Air Travel: A Case Study Of The State Of Florida, Kai Liao

Graduate Theses and Dissertations

Florida is a state in the southeastern region of the United States. Its infrastructure allows for several travel modes including: rail, automobile, bus, aircraft, and ship. However, most intrastate travelers in Florida are limited to two practical choices: travel by car (ground mode) or travel by air (air primary mode). Due to the dramatic growth of Florida’s population over recent years, traffic has become a critical factor that impacts Florida’s development. This thesis focuses on intrastate air primary mode and develops decision making models that could aid government and airline companies to better understand travelers need and as ...


The Effect Of Urbanization On The Embodied Energy Of Drinking Water In Tampa, Florida, Mark Vincent Eli Santana Sep 2015

The Effect Of Urbanization On The Embodied Energy Of Drinking Water In Tampa, Florida, Mark Vincent Eli Santana

Graduate Theses and Dissertations

Increasing urbanization has serious implications for resource and energy use. One of these resources is drinking water. The increased amount of impervious surfaces associated with urban development is responsible for increased runoff during rain events, which may have a negative impact on the quality of nearby bodies of water, including drinking water sources. The growing populations associated with urbanization require a higher water demand. In addition, urban drinking water systems use energy to collect, treat, and distribute a safe reliable effluent to users. Therefore, this study focuses on the degree to which urbanization influences the embodied energy of drinking water ...


Expanding The Role Of Design: Developing Holistic Food Systems, Jasmine Singh Jan 2015

Expanding The Role Of Design: Developing Holistic Food Systems, Jasmine Singh

Graduate Theses and Dissertations

Post World War II, technological and political factors prioritized economic efficiency in food production, distribution and access. Although this currently delivers benefits such as the doubling of caloric production and food availability despite geographic constraints, the food system is becoming implicated both directly and indirectly with a host of environmental and social issues.

This thesis re-frames food system issues as "wicked problems" (Buchanan, 1992, 15) and develops a framework of design tactics . The framework is used as a matrix for analyzing past and current theory and practice based design approaches that engage the food system and two university food systems ...


Understanding Competing Motivations For Urban Agriculture: An Analysis Of U.S. Municipal Ordinance Adoption, Andrea Vaage Jan 2015

Understanding Competing Motivations For Urban Agriculture: An Analysis Of U.S. Municipal Ordinance Adoption, Andrea Vaage

Graduate Theses and Dissertations

Municipalities are increasingly responding to zoning regulations that act as a barrier to the practice of urban agriculture activities. While there has been some case-study research on municipalities engaging in large urban agriculture policy efforts, a framework for analyzing urban agriculture ordinances on a national scale has not yet been established. This research is an exploratory analysis of the motivations for urban agriculture ordinance adoption utilizing a theoretical framework of neoliberalism to understand the potential for urban agriculture to be used either as a tool to reinforce or alter neoliberal structures. Responses from 34 municipalities throughout the United States that ...


Develop A Social Return On Investment Framework For Iowa Rural Bridge Transportation Asset Management, Maria Catalina Miller Jan 2015

Develop A Social Return On Investment Framework For Iowa Rural Bridge Transportation Asset Management, Maria Catalina Miller

Graduate Theses and Dissertations

In 2012, the U.S. Congress passed the Moving Ahead for Progress in the 21st Century (MAP-21) Act, which funds surface transportation programs and transforms the policy and programmatic framework for capital investments to guide the growth and development of the country's vital transportation infrastructure. Within many of its goals, MAP-21 supports the economic growth of the regions and requires each state to develop a Transportation Asset Management (TAM) plan (FHWA-5 2012).

Therefore, the objective of this study is to develop a framework for the Iowa Department of Transportation (IADOT) to help in the prioritization and allocation of the ...


An Exploratory Case Study Of Three Scales Of Food Pantries In Story County, Iowa, Jacqueline Ann Nester Jan 2015

An Exploratory Case Study Of Three Scales Of Food Pantries In Story County, Iowa, Jacqueline Ann Nester

Graduate Theses and Dissertations

Story County, Iowa, has the highest rate of food insecurity (15.2%) in the state (12.7%). As a result of this large need, the county has responded by creating 16 private food pantries and one soup kitchen. Many people, however, require both public (e.g. SNAP, WIC, TEFAP, and School Lunch/Breakfast Program) and private assistance, indicating the depth of food insecurity is great. As a result of this growing demand for private emergency food to supplement public food assistance programming, questions emerge about the effectiveness of this approach. Thus, an exploratory case study looking at three scales of ...


An Analysis Of Travel Behavior Of University Population Consisting Of Students, Faculty And Staff At Iowa State University, Meghna Chakraborty Jan 2015

An Analysis Of Travel Behavior Of University Population Consisting Of Students, Faculty And Staff At Iowa State University, Meghna Chakraborty

Graduate Theses and Dissertations

The study of travel behavior is one of the key areas in the field of transportation planning. However, there is has been limited research on the travel behavior of university population. With the help of analyzing the travel behavior of university population including students and employees, this study attempts to answer the following questions: (i) what are the modal choices of the students and employees in a rural university setting? (ii) how employees and university students from the same university are different in terms of travel behavior? (iii) what are the influencing factors or determinants of the travel pattern of ...


The Effect Of Airport Servicescape Features On Traveler Anxiety And Enjoyment, Vanja Bogicevic May 2014

The Effect Of Airport Servicescape Features On Traveler Anxiety And Enjoyment, Vanja Bogicevic

Graduate Theses and Dissertations

The physical attributes of the service setting are critical differentiators among service providers that significantly influence customers' emotional responses. Following the changes in the airport industry and addressing the gap in the existing research, this study aims to investigate the relationship between physical servicescape elements, emotional responses of enjoyment and anxiety and word-of-mouth in the context of airport environment.

This study was conducted in three phases. The first phase incorporated an EFA conducted on a pilot study sample of 174 respondents that proposed a six-factor structure of airport service environment. In the second phase of the study, a self-administered online ...


Deriving Statewide Freight Truck Flows From Global Positioning System (Gps) Data, Akbar Bakhshi Zanjani Jan 2014

Deriving Statewide Freight Truck Flows From Global Positioning System (Gps) Data, Akbar Bakhshi Zanjani

Graduate Theses and Dissertations

An accelerated growth in the volume of freight shipped on Florida's highways has led to a significant increase in truck traffic, influencing traffic operations, safety, and the state of repair of highway infrastructure. Traffic congestion in turn has impeded the speed and reliability of freight movement on the highway system. Appropriate planning and decision making processes are necessary to address these issues. However, a main challenge in establishing such processes is the lack of adequate data on statewide freight movements. As traditional data sources on freight movement are either inadequate or no longer available, new sources of data must ...


"Keep It Rural": The Politics Of Planning For Smart Growth In South Fulton County, Georgia, Eric John Christianson Jan 2014

"Keep It Rural": The Politics Of Planning For Smart Growth In South Fulton County, Georgia, Eric John Christianson

Graduate Theses and Dissertations

The politics and practice of planning exurban areas in the United States has been a major focus of debate since the 1950s. Urban growth management and more recently smart growth have arisen in response to the sprawling forms of development that are characteristic of most North American cities. While these movements represent the development of a broad set of tools for directing growth and preserving agriculturally and biologically important land, political and institutional barriers to their implementation remain strong. A more robust understanding of the political environment in which plans with strong growth management are enacted and implemented is necessary ...


Evaluation Of Systemic Safety Methodologies On Low-Volume Rural Paved Roadways, Georges Elias Bou Saab Jan 2014

Evaluation Of Systemic Safety Methodologies On Low-Volume Rural Paved Roadways, Georges Elias Bou Saab

Graduate Theses and Dissertations

Prioritizing locations in rural areas has been a major concern to various transportation agencies due to the wide-spread nature of crashes on rural roadways. A systemic (more proactive) approach is required to rank sites in this case since the traditional "hot spot" method only considers crash data. The thesis was based on a prioritization project funded by Mid-America Transportation Center (MATC). Several systemic safety methodologies were explored and summarized in the report. However, one technique was selected, i.e. Minnesota CRSP approach, on the basis of a decision-making matrix that included five factors. The selected technique was applied on secondary ...