Urban Studies and Planning Commons^™

Making A Case For Equity Planning In Transportation Development: Identifying Indicators And Building A Framework For Hillsborough County, Fl, Dayna J. Lazarus

USF Tampa Graduate Theses and Dissertations

The idea that planners should work toward an equitable society has been part of the profession since the 1960s, largely based on the work of planning theorists like Paul Davidoff, Sherry Arnstein and Norman Krumholz. Transportation planning, however, has been slower than other sectors of the profession, such as housing, to embrace equity planning concepts. That has begun to change as concerns about income inequality, environmental justice and climate change have become more salient. This thesis makes the case that in order to improve social equity outcomes, transportation planners must make social equity an explicit goal and add social equity …

Statistical Anomaly Detection And Mitigation Of Cyber Attacks For Intelligent Transportation Systems, Ammar Haydari

USF Tampa Graduate Theses and Dissertations

Secure vehicular communication is a critical factor for secure traffic management. Perfect security in intelligent transportation systems (ITS) has solid and efficient intrusion detection systems (IDS). In this paper, we consider false data injection attacks and distributed denial-ofservice attacks (DDoS), especially the stealth low-rate DDoS attacks, targeting the integrity and availability, respectively, in vehicular ad-hoc networks (VANET). Novel statistical intrusion detection and mitigation techniques are proposed for the considered attacks. The performance of the proposed methods are evaluated using a traffic simulator and a real traffic dataset. Comparisons with the state-of-the-art solutions clearly demonstrate the superior performance of the proposed …

Steady State Hydroplaning Risk Analysis And Evaluation Of Unsteady State Effects, Menna Yassin

USF Tampa Graduate Theses and Dissertations

Hydroplaning is a major concern on high speed roadways during heavy rainfall events. Hydroplaning tools are widely used by designers to reduce their roadway’s hydroplaning potential, therefore reducing the possibilities of severe crashes. This dissertation presents two methodologies for improving the prediction of hydroplaning potential.

The first phase focused on improving an existing widely used software called PAVDRN. Using multiple datasets from the Florida Department of Transportation, the author filtered the data using specific criteria to leave only truly dynamic hydroplaning crashes. The author then evaluated PAVDRN’s prediction capabilities and assessed its reliability in predicting a hydroplaning crash. Using past …

Routing And Designing Networks For Two Transportation Problems, Liu Su

USF Tampa Graduate Theses and Dissertations

Routing and designing are essential for transportation networks. With effective routing and designing policies, transportation networks can work safely and efficiently. There are two transportation problems: hazardous materials (hazmat) transportation and warehouse logistics. This dissertation addresses the routing of networks for both problems. For hazmat transportation, the routing can be regulated via network design. Due to catastrophic consequences of potential accidents in hazmat transportation, a risk-averse approach for routing is necessary. In this dissertation, we consider spectral risk measures, for risk-averse hazmat routing. In addition, we introduce a network design problem to select a set of closed road segments for …

Low-Income Access To Employer-Based Transit Benefits: Evidence From 10 Large Metropolitan Regions, Andrea Hamre

Journal of Transportation Demand Management Research

While national aggregate statistics suggest employer-based transit subsidies may be inaccessible to the majority of the working poor, this is the first study to investigate the subject with disaggregate data while controlling for additional factors. This study uses household travel surveys for 10 of the largest Metropolitan Planning Organizations, grouped into seven cases. In each case, the share of workers offered an employer-based transit subsidy is lowest for workers in the lowest income quintile. Binary logistic regression results for the odds of being offered an employer-based transit subsidy are presented for two cases, Washington, DC, and Denver, CO, and the …

Statistical Analysis Of The Role Of Socio-Demographic And Health Factors In Shared Mobility Related Behaviors And Usage Likelihoods, Natalia M. Barbour

USF Tampa Graduate Theses and Dissertations

New transportation technologies and shared mobility systems have not only disrupted the market but also revolutionized the way mobility is perceived. With such rapidly progressing technology, it is likely that this transformation will continue to happen and the market will evolve further. Private and public sectors have been equally engaged in this process and new policies are being formed to accommodate this growth.

The objective of this dissertation study is to investigate how shared mobility is being perceived and utilized, and how socio-demographic and health factors affect users’ behaviors and usage likelihoods. Questionnaire surveys are designed and distributed to collect …

Increasing The Supply Of The Missing Middle Housing Types In Walkable Urban Core Neighborhoods: Risk, Risk Reduction And Capital, Shrimatee Ojah Maharaj

USF Tampa Graduate Theses and Dissertations

There is a low supply of the missing middle housing types (MMH) in walkable urban core neighborhoods. That is, a variety of compact low- to mid-rise housing in walkable areas that are accessible to entertainment, recreational and other amenities. The largest demographic, the millennials, followed by the baby boomers, prefer the MMH types. The MMH types is a new name for a variety of compact housing types that existed in traditional neighborhoods in urban areas pre-World War II. However, due to changes in housing preferences after World War II, the requisite land use and zoning changes facilitated larger single-family homes …

A Tall Ship: The Rise Of The International Mercantile Marine, Jeffrey N. Brown

USF Tampa Graduate Theses and Dissertations

Between 1890 and the outbreak of the Great War in 1914, nations on both sides of the Atlantic attempted to gain prestige by building the world's greatest steamships for their merchant marines. In 1901, the United States entered this competition with the advent of J.P. Morgan's International Mercantile Marine, which built on the previous work of shipping magnate Clement Griscom. This project will explore why and how Morgan built his monopoly and the implications and repercussions this project had for both Atlantic shipping and U.S. foreign relations. Moving beyond Morgan the man, it also tells the story of the key …

Development Of A New Piezoelectric-Based Energy Harvesting Pavement System, Lukai Guo

USF Tampa Graduate Theses and Dissertations

A novel design of a piezoelectric-based energy harvesting pavement system (PZ-EHPS) is introduced in this dissertation work. The design concept of this PZ-EHPS is to transform asphalt layers into a piezoelectric energy harvester to collect dissipated vehicle kinetic energy in a large-scale system, relying on two conductive asphalt layers and one piezoelectric material layer. To verify the feasibility of the above design concept, this dissertation work practically fabricated and tested a series of PZ-EHPS specimens under the loads from a Material Testing System (MTS) in the laboratory, and theoretically analyzed one typical PZ-EHPS specimen via a three-degree-of-freedom electromechanical model and …

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

USF Tampa 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 2001 …

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

USF Tampa 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 …

Immigration, Income, And Public Transit Perceptions: Findings From An Intercept Survey, Jesus M. Barajas, Asha Weinstein Agrawal, Daniel G. Chatman

Journal of Public Transportation

Although a significant fraction of public transit riders in the United States are immigrants, relatively little research explores whether immigrants have unique transit experiences. This paper analyzes intercept survey data from 1,247 transit riders in the San Francisco Bay Area to explore how mode choices and travel experiences differ for low-income immigrants compared to higher-income immigrants and US-born residents. We find that some public transit experiences are similar across all immigrant status and income groups, while in other ways low-income immigrants differ from their higher-income counterparts or from US-born respondents. In particular, low-income immigrants were less likely to have a …

Fare Policy And Vertical Equity: The Trade-Off Between Affordability And Cost Recovery, Xavier J. Harmony

Journal of Public Transportation

Vertical equity and the maximization of farebox revenue are important but conflicting goals in the development of fare policy in the United States. Reducing fares for low-income riders reduces revenue for a transit agency, while increasing fares could disproportionately impact lower-income riders. This paper details this conflict, explores strategies that could account for both goals, and evaluates fare programs in the United States. Two types of low-income strategies are discussed: first generation strategies and targeted subsidy strategies. First generation strategies have several limitations that targeted subsidy strategies account for; first generation strategies focus more on supply, while targeted subsidy strategies …

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

USF Tampa 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

USF Tampa 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 capita ridership trend is concerning given the …

Performance Evaluation Of Choice Set Generation Algorithms For Modeling Truck Route Choice: Insights From Large Streams Of Truck-Gps Data, Divyakant Tahlyan

USF Tampa Graduate Theses and Dissertations

This thesis evaluates truck route choice set generation algorithms and derives guidance on using the algorithms for effective generation of choice sets for modeling truck route choice. Specifically, route choice sets generated from a breadth first search link elimination (BFS-LE) algorithm are evaluated against observed truck routes derived from large streams of GPS traces of a sizeable truck fleet in the Tampa Bay region of Florida. A systematic evaluation approach is presented to arrive at an appropriate combination of spatial aggregation and minimum number of trips to be observed between each origin-destination (OD) location for evaluating algorithm-generated choice sets. The …

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

USF Tampa 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

USF Tampa 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

USF Tampa 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 73,000 …

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

USF Tampa 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 expeditious …

Mobile-Based Sidewalk Inventory App For Smart Communities, Health, And Safety, Madhav Erraguntla, Dursun Delen, Rupesh K. Agrawal, Karthic Madanagopal, Richard Mayer

Suburban Sustainability

As the United States and other nations strive to cope with the obesity epidemic (NCHS, 2015), progressive communities are developing sidewalk infrastructure to promote physical activity and health. The Center for Disease Control (CDC) recommends that community-based interventions like neighborhood walk, bike programs etc. have shown to be effective in promoting physical activity and health. Smart cities are embracing the development of community trails and promoting their use to increase physical activity among youth and adults. System implementation, data collection, and analysis were performed from January 2015 through July 2015. To promote these objectives, communities and cities need accurate information …

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

USF Tampa 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

USF Tampa 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 street vending, I describe …

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

USF Tampa 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 single-modal …

The S-Curve Of Technological Adoption: Mobile Communication Devices On Commuter Trains In The Chicago Region, 2010–2015, Joseph P. Schwieterman, Lauren A. Fischer

Journal of Public Transportation

Urban transit riders’ use of mobile communication devices has grown markedly in recent years. Studies evaluating the usage of these devices have generally focused on only one or two points in time, limiting their ability to describe long-range trends. To foster insights into this issue, this study evaluated data from 15,531 passenger observations collected on 156 commuter trains on the metropolitan commuter rail system of Chicago, Illinois, from 2010 through 2015. The data show that the rate of technological usage is following an S-shaped pattern among passengers. The share of passengers using mobile communication devices at observed points grew sharpest …

Impacts Of New Light Rail Transit Service On Riders' Residential Relocation Decisions, You-Lian Chu, Yi Deng, Rongfang (Rachel) Liu

Journal of Public Transportation

Using the rider survey data collected from Hudson-Bergen Light Rail Transit System in New Jersey, this paper investigated the residential relocating decisions of the riders who have been riding the LRT for a period of time. Using the Heckman’s sample selection model, the paper extends the current mobility literature by describing not only a rider’s likelihood to move as a result of the new LRT service but also the movers’ orientation toward their residence distances to LRT stations. Information on the socio-economic characteristics of the movers and their residence distances to LRT stations would help planners and developers identify areas …

Access To Taxicabs For Unbanked Households: An Exploratory Analysis In New York City, David A. King, Juan Francisco Saldarriaga

Journal of Public Transportation

Taxicabs are critical complements to public transit systems. In New York City, ubiquitous yellow cabs are as iconic as the city’s subway system, and the city recently added green taxicabs to improve taxi service in areas outside of the Central Business Districts and airports. In this paper, we used multiple datasets to explore taxicab fare payments by neighborhood and examine how paid taxicab fares are associated with use of conventional banking services. There are clear spatial dimensions of the propensity of riders to pay cash, and we found that both immigrant status and being “unbanked” are strong predictors of cash …

Measuring The Accuracy Of Bus Rapid Transit Forecasts, John Perry

Journal of Public Transportation

The research of Dr. Bent Flyvbjerg in the 1990s and early 2000s showed that urban rail projects often cost more than estimated and carried fewer riders than projected, a troubling trend suggesting that the forecasts for urban rail projects were too optimistic in terms of cost and ridership. Inspired by that research, this analysis seeks to extend that framework to analyze Bus Rapid Transit (BRT). A study of forecast vs. actual costs and ridership was conducted for 19 BRT projects in the United States. From this, it was found that the cost projections for these projects tended to be quite …

The Causal Effect Of Bus Rapid Transit On Changes In Transit Ridership, Orion T. Stewart, Anne Vernez Moudon, Brian E. Saelens

Journal of Public Transportation

Numerous studies have reported ridership increases along routes when Bus rapid transit (BRT) replaces conventional bus service, but these increases could be due simply to broader temporal trends in transit ridership. To address this limitation, we compared changes in ridership among routes where BRT was implemented to routes where BRT was planned or already existed in King County, Washington. Ridership was measured at 2010, 2013, and 2014. Ridership increased by 35% along routes where BRT was implemented from 2010 to 2013 compared to routes that maintained conventional bus service. Ridership increased by 29% along routes where BRT was implemented from …

A New Market Segmentation Approach: Evidence From Two Canadian Cities, Dea Van Lierop, Ahmed El-Geneidy

Journal of Public Transportation

Traditionally, transit market research has categorized passengers into two distinct groups: captive riders and choice riders. Market analyses that depend on such broad categories are likely to overlook important details about the needs and desires of their customer base. This study attempts to better understand the complexities of the different groups who take transit by using information from five years of customer satisfaction questionnaires collected by two Canadian transit providers. Employing a series of clustering techniques, the analysis reveals that nine market segments are present across different modes in both transit agencies. Three different overarching groups of transit users are …