Transportation Commons^™

Strategies For Reducing Occupational Stress On Cabin Crewmembers In The Airline Industry, Wendy N. Lindsey

Walden Dissertations and Doctoral Studies

Occupational stress threatens airline cabin crew and passengers’ health and safety. Airline leaders who lack strategies to address occupational stress may experience adverse impacts on cabin crew health, organizational efficiency, and overall aviation safety. Grounded in the job demands-resources theory, the purpose of this single case study was to explore strategies that upper-level airline leaders used to reduce occupational stress on cabin crewmembers. The participants were five upper-level airline leaders with more than 10 years of airline experience. Data were collected via semistructured interviews, organizational documents, and company records. Three themes emerged from Yin’s five-step approach: inflight training for generating …

Technology Innovation Strategies Supply Chain Managers Adopt To Improve Product Marketing And Profitability, George Richard Rapciewicz Jr.

Walden Dissertations and Doctoral Studies

Improperly planned capital investments in new technologies could result in lost productivity for e-procurement and supply chain managers in the e-commerce industries. Grounded in the technology acceptance model, the qualitative multiple case study design was used to explore strategies business managers use to adopt technology innovations to improve product marketing and profitability. Participants were five supply chain business managers and owners from five separate organizations in the southwestern region of the United States. Data were collected via responses submitted through Google Forms and emails, written logs, telephone calls, and recorded audio. Thematic analysis resulted in two key themes: perceived ease …

Strategies For Catalyzing Supply Chain Innovation In Midsized Manufacturing Firms, Matthew J. Szukalowski Iii

Walden Dissertations and Doctoral Studies

Supply chain inflexibility results in reduced efficiency and profitability. Without supply chain flexibility, supply chain managers in manufacturing firms risk the loss of competitive advantage due to reduced efficiency and profitability. Grounded in business process engineering conceptual framework, the purpose of this qualitative multiple case study was to explore strategies supply chain leaders in manufacturing organizations use to achieve supply chain flexibility. The participants were five supply chain leaders in the manufacturing industry in the midwestern United States and successfully implemented innovative solutions to achieve supply chain flexibility. Data were collected using semistructured interviews and a review of company documents …

Parents' And Caregivers' Attitudes About Child Passenger Safety, Latoya Wider

Walden Dissertations and Doctoral Studies

Motor vehicle crashes are a leading cause of childhood injury and death in the United States. Many car seats are installed incorrectly, and many children under the age of 6 are seriously injured or killed in a motor vehicle crash. The purpose of this study was to examine the relationship between age of child, age of parent/caregiver, attitudes, and behaviors of child passenger safety among parents and caregivers in South Carolina. The influence of age and attitude on consistent car seat use was also examined. The study was based on the theory of planned behavior. A survey design featuring questions …

Definition And Detection Of Hypervulnerabilities Using A Framework For Assessing Port Resilience, Katherine Smith, Rafael Diaz, Yuzhong Shen, Francesco Longo

VMASC Publications

Long term plans for maritime ports are identifying investments that will increase their capacity while decreasing their environmental footprint and operating costs. These changes are leading to increases in complexity at a time when leaner practices are driving investments to become more strategic. As such, this work proposes a generalized definition that allows a system or entity to be classified as exceedingly vulnerable by comparing it to other entities. This definition is developed from a set of definitions gathered from disparate fields. From this definition grounded in theory, the initial rules for complex system implementation are developed and demonstrated on …

Engineering Countermeasures For Left Turns At Signalized Intersections: A Review, Siby Samuel, Amandeep Singh, Yusuke Yamani

Psychology Faculty Publications

Left turn crashes can impact the safety of the drivers due to the speed and angle at which they occur. Left turns are specifically reported to affect older drivers more than the other types of crashes. This paper provides a review of the existing engineering countermeasures that have been evaluated to improve driver safety at left turns. Twenty- eight studies on left turn signal displays (protected left turns, flashing yellow arrow, and digital countdown timers), intersection geometry (offset left turn lanes, diverging diamond interchange, roundabouts, exit lanes for left turn, left turn bay extension, and contraflow left turn lanes), and …

Sustainable Strategies For Mass Rapid Transit Ppps, Sock Yong Phang, Bin Chye Tan

Research Collection School Of Economics

Mass rapid transit (MRT) PPPs have proliferated in the past two decades. This chapter provides a framework to categorise and understand alternative PPP designs. As MRT systems are inherently large, unprofitable and risky projects, PPP design is critical to project success and sustainability. We study the experiences of MRT PPPs in London, Hong Kong, Singapore and Beijing to understand factors underlying success and failure and to arrive at policy recommendations for PPPs. Policymakers need to have additional governance improvement and risk mitigation measures in place when tied supply chains are utilised. Hong Kong’s experience illustrates that ‘Rail plus Property’ strategy …

Strategies For Catalyzing Supply Chain Innovation In Midsized Manufacturing Firms, Matthew J. Szukalowski Iii

Walden Dissertations and Doctoral Studies

Supply chain inflexibility results in reduced efficiency and profitability. Without supply chain flexibility, supply chain managers in manufacturing firms risk the loss of competitive advantage due to reduced efficiency and profitability. Grounded in business process engineering conceptual framework, the purpose of this qualitative multiple case study was to explore strategies supply chain leaders in manufacturing organizations use to achieve supply chain flexibility. The participants were five supply chain leaders in the manufacturing industry in the midwestern United States and successfully implemented innovative solutions to achieve supply chain flexibility. Data were collected using semistructured interviews and a review of company documents …

Disenfranchised Residents’ Perceptions Of The Public Transportation Accessibility-Job Opportunity Mismatch In San Bernardino, California, Maggi Elgeziry

Walden Dissertations and Doctoral Studies

AbstractPeople access employment opportunities at a more affordable rate by using public transportation. In San Bernardino, California, poverty, minority populations, and low-skilled individuals all exceed national rates. This research explored how a cheap and reliable means of transportation would facilitate access to job opportunities that would otherwise be relatively expensive for this disadvantaged population to access. Research has documented the benefit of public transportation in communities where public transportation is pivotal in helping disadvantaged populations access job opportunities. Common good theory (CGT) was used to explain the shared benefit that communities reap when working together for a common socioeconomic purpose. …

Can Californian Households Save Money On Transportation Costs By Living In Transit-Oriented Developments (Tods)?, Hongwei Dong

Mineta Transportation Institute

Many residents in large Californian metropolitan areas are heavily burdened by housing costs. Advocates, researchers, and elected officials in California are debating whether transit-oriented development (TOD) could be an effective tool to mitigate the housing affordability problem by increasing housing supply and reducing transportation costs in transit-rich neighborhoods. This study contributes to this debate by estimating how much Californian families can save on transportation costs by living in transit-oriented developments (TODs). By utilizing the confidential version of the 2010–2012 California Household Travel Survey, this study evaluates the impact of TOD on household transportation expenditures by comparing TOD households with two …

Which Transportation Technologies Do We Want?, Michael Lewyn

Scholarly Works

A review of Todd Litman's book, New Mobilities- Smart Planning for Emerging Transportation Technologies

The Two-Echelon Vehicle Routing Problem With Transshipment Nodes And Occasional Drivers: Formulation And Adaptive Large Neighborhood Search Heuristic, Vincent F. Yu, Minh P. K. Nguyen, Kuza Putra, Aldy Gunawan, I. Gusti Bagus Budi Dharma

Research Collection School Of Computing and Information Systems

This research introduces a new variant of the two-echelon vehicle routing problem (2EVRP) called the two-echelon vehicle routing problem with transshipment nodes and occasional drivers (2EVRP-TN-OD). In addition to city freighters in the second-echelon network, a set of occasional drivers (ODs) is available to serve customers. ODs are the basis of a crowd-shipping system in which crowds with planned trips are willing to take detours to deliver packages in exchange for some compensation. To serve customers, ODs collect the assigned packages at either satellite served by first-echelon trucks or transshipment nodes served by city freighters. We formulate this problem as …

Adapting The Human Factors Analysis And Classification System For Commercial Fishing Vessel Accidents, Peter Zohorsky, Holly Handley, Ronald Boring (Ed.)

Engineering Management & Systems Engineering Faculty Publications

The commercial fishing industry is frequently described as one of the most hazardous occupations in the United States. The objective, to maximize the catch, is routinely challenged by a variety of elements due to the environment, the vessel, the crew, and how they interact with each other. This study developed and evaluated a version of Wiegmann and Shappell’s (2003) Human Factors Analysis and Classification System (HFACS), specifically for commercial fishing industry vessels (HFACS-FV), using data from ten years of fatal fishing vessel accidents. For this study, the accident investigation information was converted into the HFACS-FV format by independent raters and …

Schedule Reliability In Liner Shipping Timetable Design: A Convex Programming Approach, Abraham Zhang, Zhichao Zheng, Chung-Piaw Teo

Research Collection Lee Kong Chian School Of Business

Container liner shipping is the primary mode of moving manufactured products across continents. Partly due to inherent uncertainties at sea and ports, the liner shipping industry has long had a notorious reputation of schedule delays and unreliable on-time performance. This paper formulates a new approach to incorporate schedule reliability targets in liner shipping timetable design, to balance bunker consumption, time taken for the voyage, and schedule delays. We first model a surrogate problem using a copositive program through a moment decomposition approach and solve it as a convex semidefinite programming relaxation. We next incorporate schedule reliability targets implicitly by exploiting …

Crash Injury Severity Prediction With Artificial Neural Networks, Rima Abisaad

Dissertations

Motor vehicle crashes are one of our nation's most serious social, economic and health issues. They are the leading cause of death among children and young adults, killing approximately 1.35 million people each year. Providing a safe and efficient transportation system is the primary goal of transportation engineering and planning. To help reduce traffic fatalities and injuries on roadways, crash prediction models are used to forecast the injury severity of potential crashes and apply precautionary countermeasures accordingly. Most of these models are reactive as they use historical crash data to categorize crash-related factors. Recently, advancements have been made in developing …

Interstate 11: The Road To Prosperity In Nevada, Arthur C. Nelson

Policy Briefs and Reports

Interstate 11 (I-11) offers Nevada a unique opportunity to advance the economic development prospects of one of the state’s most economically challenged areas: Elko and eastern Nevada. Although the state used a qualitative system to choose a western route for I-11, this process may not have considered fully the costs of extending I-11 to Canada in a cost-effective manner or in a manner consistent with I-11 purposes, especially avoiding congested areas. This briefing report reviews the history and purposes of I-11; summarizes the I-11 route options; considers how I-11 might extend to Canada in a way that is consistent with …

Non-Linear And Weakly Monotonic Relationship Between School Quality And House Prices, Shishir Mathur

Faculty Research, Scholarly, and Creative Activity

This study provides evidence for a non-linear and weakly monotonic relationship between school quality and house prices. Using Fremont, California, as the study area, the regression analysis shows that homeowners are unwilling to pay a premium for an increase in school quality from low to medium quality. However, they are willing to pay a) a large premium when all schools are top-quality schools and b) a premium for access to nationally-renowned schools, which is in addition to the premium for top-quality schools. These findings have important land use policy significance because they provide new insights into the homeowner’s residential location …

A New Approach To Transportation Pricing: Lessons From The Poem Project, Shoshana Cohen, Emma Sagor

PSU Transportation Seminars

In October 2021, Portland City Council accepted the Pricing Options for Equitable Mobility (POEM) report. This was the culmination of 18 months of work by the POEM Task Force, a group of 19 volunteer community members who explored whether pricing tools—or charges related to driving or using road space—could be used to improve mobility, reduce climate impact, and make our transportation system more equitable. More information is available at Portland.gov/POEM.

At this seminar, POEM Project Managers Shoshana Cohen and Emma Sagor from the Portland Bureau of Transportation (PBOT) will share how this project took on the topic of …

Factors Influencing The Usage Of Shared E-Scooters : A Case Study Of Chicago, Farzana Mehzabin Tuli

Graduate Theses and Dissertations

The rapid popularity growth of shared e-scooters creates the necessity of understanding the determinants of shared e-scooter usage. This thesis estimates the impacts of temporal variables (weather data, weekday/weekend, and gasoline prices) and time-invariant variables (socio-demographic, built environment, and neighborhood characteristics) on the shared e-scooter demand by using four months (June 2019- October 2019) period of data from the shared e-scooter pilot program in Chicago. The study employs a random-effects negative binomial (RENB) model that effectively models shared e-scooter trip origin and destination count data with over-dispersion while capturing serial autocorrelation in the data. Results of temporal variables indicate that …

Solar-Powered Automated Transportation: Feasibility And Visualization, Burford J. Furman, Laxmi Ramasubramanian, Shannon Mcdonald, Ron Swenson, Jack Fogelquist, Yu Chiao, Alex Pape, Mario Cruz

Mineta Transportation Institute

A solar-powered automated transportation network (ATN) connecting the North and South campuses of San José State University with three passenger stations was designed, visualized, and analyzed in terms of its energy usage, carbon offset, and cost. The study’s methodology included the use of tools and software such as ArcGIS, SketchUp, Infraworks, Sketchup, Rhinoceros, and Autodesk 3DS Max. ATN vehicle energy usage was estimated using data from the university’s Park & Ride shuttle bus operation and by modeling with SUMOPy, the advanced simulation suite for the micro-traffic simulator SUMO. The energy study showed that an extensive solar photovoltaic (PV) canopy over …