Transportation Commons^™

Gis Approach In Vehicle Route Optimization For Residential Recyclables Collection, Karel Kus

Open Access Theses & Dissertations

This Thesis focuses on evaluation of utilization of Geographic Information Systems (GIS) for solving the residential recyclables collection routing problems.

Recyclables collection is considered as a part of reverse logistics to which a specific routing problem is connected. Rise of recycling rate in recent years, and always high transportation costs are the main drivers for looking for the new methods how to optimize routing in residential recyclables collection. Geospatial relation of data by Geographic Information Systems (GIS) software can be used to design and analyze the routing strategy. In this Thesis ArcGIS and its Network Analyst extension is used to …

A Rapid Approach For Considering Nonlinear Response Of Flexible Pavements Under Fwd And Estimation Of Remaining Lives Of Pavements, Shahabaldin Shirazi

Open Access Theses & Dissertations

Most mechanistic empirical pavement analyses are based on the layered elastic models where the stress sensitivity of geomaterials and their nonlinearity are either ignored or accounted for indirectly. Advanced numerical models, such as finite element models, are required to consider the nonlinear nature of the geomaterials. Existing pavements are often tested with the Falling Weight Deflectometer (FWD) to estimate the input moduli to the layered elastic models in order to estimate remaining life and structural capacity of pavements. It has been more than 30 years that FWD tests are being performed to measure structural adequacy of pavements. Backcalculation is the …

Employee Perception Of The Value Of Customer Focus Training In Public Transportation, Michael L. Dawkins

Walden Dissertations and Doctoral Studies

The number of service-oriented jobs has increased locally and nationally, and organizations are spending millions of dollars to train front-line employees to maintain customer satisfaction and compete in the service industry. Despite the financial investments of these training programs, little research has investigated the holistic effectiveness of customer-focused training (CFT) programs. Researchers found positive relationships between the constructs under investigation and reported that when CFT programs are delivered on a consistent basis with leadership support, they help build a service-oriented culture. The purpose of this case study was to investigate employee perceptions of CFT and relationships between performance, engagement, and …

Risks Of Driving While Talking On Mobile Devices: Soccer Parents' Perceptions, Tonisha Dawn Joyner-Bagby

Walden Dissertations and Doctoral Studies

The number of motor vehicle accidents that occur as a result of driving while talking on

mobile devices increases each year. Distracted driving is dangerous; however, policy

researchers have not focused on adults who talk on mobile devices as they drive children

to and from daily events. This study focused on the experiences of soccer parents, an

important focus because of soccer's year-long duration that requires a large amount of

driving in addition to the other daily tasks of parenting. The purpose of this

phenomenological study was to investigate the perceptions of parents of child soccer

players regarding the motivations …

European Airport Concessions: Retail Strategies To Improve Commercial Revenue From Leisure Travelers, René W. B. Puls

Walden Dissertations and Doctoral Studies

Aeronautical revenue from landing and handling charges to carriers is falling significantly below 60% of total revenue and will not persist as the main source of income for airports. Airports in Europe cannot continue to rely on profits from airlines; operating companies need to improve the competitiveness through commercial income from different traveler types. The purpose of this multiple case study was to understand the elements of successful sales strategies by concessionaires (retailers) at the metropolitan airport system of Zurich and Basel in hopes of improving the nonaeronautical revenue from leisure travelers, a price-sensitive customer segment. The conceptual framework was …

Business Strategies To Improve On-Time Deliveries And Profits In Southcentral Alaska, Donald Richard Leaver Ii

Walden Dissertations and Doctoral Studies

Traffic congestion can cause late deliveries, decreased profits from vehicle fuel idling in traffic, and delayed distribution in tight delivery windows. The focus of this study was on developing strategies that business leaders could use to increase on-time deliveries. The conceptual frameworks for this case study were systems theory, traffic equilibrium theory, bathtub theory, and kinematic wave theory. Data were collected from semistructured interviews with 6 delivery service leaders from 3 delivery businesses in Southcentral Alaska. In addition, secondary data were collected from government information. Interview responses were coded to identify trends including delivery time, business activity, and amount of …

Road Management System And Road Safety In Uganda, Paul Gudoi Zanule

Walden Dissertations and Doctoral Studies

Traffic collisions cost Uganda millions of dollars each year. The purpose of this descriptive case study was to describe the strategies and processes needed to implement a road management system. Such a system would significantly reduce the fatalities and accidents in Uganda, improve the transportation within Kampala's business district, and increase business profitability. Three conceptual theories framed the research study: management theory, strategic management theory, and criminology theory. Using a snowball sampling strategy, data were collected from open-ended interviews, questionnaires, observations, and archived documents from 20 administrative participants in the government and organizational leaders involved in the transport operations and …

Interagency Coordination Of Security Operations In A Large U.S. Seaport, Edmund Levy

Walden Dissertations and Doctoral Studies

Protecting U.S. transportation hubs against a wide variety of security threats, while avoiding undue interference with the normal operations of the hubs, is one of the greatest challenges facing security agencies. The problem addressed in this study was the limited information on the contributing factors to seaport security. The purpose of this case study was to explore issues that can inhibit efficiency of security agency operation and collaboration and to identify actions that have enhanced collaboration. Based on theories of organizational development, leadership, and security tradecraft, this study examined the activities related to maintenance of security at a large California …

Stability Of Transportation Networks Under Adaptive Routing Policies, Sebastien Boyer, Sebastien Blandin, Laura Wynter

Research Collection School Of Computing and Information Systems

Growing concerns regarding urban congestion, and the recent explosion of mobile devices able to provide real-time information to traffic users have motivated increasing reliance on real-time route guidance for the online management of traffic networks. However, while the theory of traffic equilibria is very well-known, much fewer results exist on the stability of such equilibria, especially in the context of adaptive routing policy. In this work, we consider the problem of characterizing the stability properties of traffic equilibria in the context of online adaptive route choice induced by GPS-based decision making. We first extend the recent framework of “Markovian Traffic …

Managing Optimum Workload Through Terminal Appointment System (Tas) : Case Of Jakarta International Container Terminal, Usman Saroni

World Maritime University Dissertations

The Dissertation is a study of optimizing terminal through Terminal Appointment System (TAS), comparing the impact of unscheduled truck arrival with regulated truck arrival to the optimization process. A brief look is taken at present growth in container business. The rapid growth of world container trade, especially in Asia brings economic potentials for the countries and also challenges for container terminals. Capacity limitation in accommodating the trade growth forces the terminal to optimize their existing equipment and facilities. The evaluation of the existing performance of each component of the terminal operation, covering quay, yard and gate operation, is a starting …

Relationship Between Maritime Logistics Performance And International Trade Competitiveness : A Case Study Of Nigeria In Central West African Cluster Of Countries, Victor Isioma Onyemejor

World Maritime University Dissertations

This dissertation examines the relationship between logistics performance and international trade competitiveness. It aims to identify the challenges of logistics performance in Nigeria and analyse their effects on international trade competitiveness. The study also seeks to identify possible solutions for improving logistics performance for better competitiveness in foreign trade. The study takes a trend and comparative analysis approach to providing answers to the research questions and analyses quantitative and qualitative data, balancing established statistical data with expert opinions from a survey administered to 100 personnel actively involved with logistics and trade. The outcome of the survey showed that logistics performance …

Major Challenges And Solutions For Utilizing Big Data In The Maritime Industry, Sadaharu Koga

World Maritime University Dissertations

The dissertation is a study of big data for the use in the maritime industry. Today’s society is information-intensive. The term “big data” is becoming more common. In fact, some maritime companies and institutions have already been trying to utilize big data for enhancing maritime safety and environmental protection. In order to promote this trend, the dissertation tries to identify common and important challenges for the whole maritime industry in terms of the utilization of big data and propose corresponding solutions. First, by reviewing the definitions of big data, three major features are identified. Big data takes electronic form, is …

Navy, Russian (1991-), Bert Chapman

Libraries Faculty and Staff Scholarship and Research

Provides a historical overview and analysis of events affecting the Russian Navy from 1991-present. Emphasizes how this force still has mammoth strategic ambitions despite limited resources and an obsolete infrastructure. Stresses the ongoing presence of nuclear weapons, the increasing importance of the Northern Sea Route in Russian and international trade and strategy, and how U.S. and NATO countries budget constraints may make it hard for them to resist Russian assertiveness in areas such as Ukraine.

The Objective Vs. The Perceived Environment: What Matters For Active Travel, Liang Ma

Dissertations and Theses

This study aims to explore the relationship between the objective (actual) environment and people's perceptions of the environment, and their relative effects on active travel behavior, particularly bicycling behavior. This is an important research gap in the current literature linking the built environment and active travel. Better understanding this relationship will help to explore the mechanism underlying the built environment- behavior relationship and identify potential interventions to promote active travel.

Relying on the data from Portland, OR, this study investigated the following four research questions: (1) How does the objectively measured environment correspond to the perceived environment? And what factors …

Evaluating The Planning And Implementation Of Major Transit Capital Projects In The Portland Region, Joseph Recker

PSU Transportation Seminars

The Federal Transit Administration's (FTA) discretionary New Starts program is the federal government's largest discretionary funding program. From heavy to light rail, from commuter rail to bus rapid transit systems, the FTA's New Starts program has helped to make possible hundreds of new or extended transit fixed guideway systems across the country, including most of TriMet’s light rail extensions and WES commuter rail. Beginning in 2001, FTA has required project sponsors to prepare a Before and After Study report on the effectiveness of planning and implementation of New Starts and Small Starts projects. The studies focus on five transit characteristics …

Drivers' Perception Of Saher Traffic Monitoring System In Jeddah, Saudi Arabia, Yaseen Jan

Masters Theses & Specialist Projects

This study examined the drivers' perception of the SAHER (means "watchful" in Arabic) system in Jeddah, Saudi Arabia. The purpose of this study was to analyze the perception of the SAHER system on impacting the overall traffic conditions in Jeddah, Saudi Arabia including its effectiveness and flaws. A survey was conducted and distributed to 70 drivers and residents of Jeddah. Drivers were divided into two groups based on their age. Five hypotheses were tested in this study. Hypotheses one through four were tested using the averages of related questions. Hypothesis five was tested statistically using a z-test for differences between …

Evaluation Of Bicyclists Exposure To Traffic-Related Air Pollution Along Distinct Facility Types, James F. Pankow, Miguel A. Figliozzi, Alexander Y. Bigazzi

Civil and Environmental Engineering Faculty Publications and Presentations

While bicyclists and other active travelers obtain health benefits from increased physical activity, they also risk an uptake of traffic-related air pollution. But pollution exposure for urban bicyclists is not well understood due to a lack of direct measurements and insufficient analysis of the determinants of exposure. This knowledge gap impedes pollution-conscious transportation planning, design, and health impact assessment. The research presented in this report generates new connections between transportation system characteristics and pollution exposure for bicyclists. The primary research questions are: 1) How does urban bicyclists’ exposure to air pollution vary with roadway and travel characteristics? and 2) To …

Inclusive Planning To Evaluate Improved Non-Emergency Medical Transportation Services For Patients With End Stage Renal Disease, Jenny Liu, August Benzow

TREC Final Reports

The objective of this project is to design a framework that could be used to evaluate the effectiveness and efficiency of non-emergency transportation services (NEMT) for better livability. In addition to the development of the framework, this project aimed to establish connections between Portland State University (PSU) researchers with regional connections involved in public health research, non-emergency medical transportation, medical services, and medical insurance provision. With the rising costs of transportation and medical costs generally in the United States, it is increasingly important to develop new tools and strategies to reduce these costs while maintaining and improving upon the level …

Walking And Cycling In San Francisco: Identifying Underserved Locations That Are Particularly Receptive To Non-Motorized Transport Via The Pedestrian And Bicycling Survey, Rebecca Walters

Master's Projects

No abstract provided.

A Case Study Of Pedestrian Environments Around Tamien Station In San Jose, California: An Analysis Of Existing Conditions And Recommendations To Improve Pedestrian Access And Promote Walking Around Tamien Station, Priya Gopalkrishnan

Master's Projects

The objective of this research is to understand how the analysis of design elements can foster design recommendations for the transformation of the pedestrian environment around the Tamien Station area. This was done by conducting a street segment audit for twenty-five selected streets around the one-half mile walking distance of Tamien Station providing recommendations based on audit findings and urban design analysis.