Public Affairs, Public Policy and Public Administration Commons^™

Public Transportation Use By Commuters In The Mountain West, Francisco Reyes, Caitlin J. Saladino, William E. Brown Jr.

Transportation & Infrastructure

This fact sheet synthesizes data on methods and accessibility of transportation for commuters in the Mountain West (Arizona, Colorado, Nevada, New Mexico, and Utah). This fact sheet explores data from the most populous county in each state, using data originally provided by the U.S. Bureau of Transportation Statistics. This dataset includes the type of transportation available (personal automobile, air travel, and maritime travel), the number of resident workers, the percent of these workers that commute to work, and the number of workers commuting within each county.

Webinar: Transportation Benefits Of Polycentric Urban Form, Reid Ewing, Sadegh Sabouri

TREC Webinar Series

A “polycentric” region consists of a network of compact developments connected with each other through high-quality transportation options. Rather than continuing the expanse of low-density development radiating from an urban core, investments can be concentrated on central nodes and transit connections. This development pattern is very popular in Europe and is linked to significant benefits. This presentation is aimed at exploring the academic literature and empirical evidence surrounding polycentric development, analyzing more than 120 regional transportation plans to see how they promote polycentric development, defining types of centers in a hierarchy of centers, quantifying the transportation benefits of polycentric development, …

Public Transit Infrastructure And Heat Perceptions In Hot And Dry Climates, Yuliya Dzyuban, David M. Hondula, Paul J. Coseo, Charles L. Redman

Research Collection College of Integrative Studies

Many cities aim to progress toward their sustainability and public health goals by increasing use of their public transit systems. However, without adequate protective infrastructure that provides thermally comfortable conditions for public transit riders, it can be challenging to reach these goals in hot climates. We took micrometeorological measurements and surveyed riders about their perceptions of heat and heat-coping behaviors at bus stops with a variety of design attributes in Phoenix, AZ, USA, during the summer of 2018. We identified the design attributes and coping behaviors that made riders feel cooler. We observed that current infrastructure standards and material choices …

Is Uber Bad For The Environment?, Singapore Management University

Perspectives@SMU

Research finds Uber’s carbon footprint depended on the characteristics of individual cities

Reimagining China’S Transportation Funding Investments In Africa In The Context Of Covid-1, Clovia Hamilton, Sira Maliphol

Technology & Society Faculty Publications

Africa has not invested enough in its healthcare system, and China has been investing in and financing much of Africa’s transportation system. Many African countries’ fragile health and transportation systems have been further weakened by the COVID-19 pandemic. This literature review confirms the interdependence of the key functional areas of comprehensive development planning and the importance of building and maintaining a sound transportation infrastructure. With respect to partnerships with China, African nations need to strengthen government functional areas more comprehensively, considering all of the areas of development planning including trade as well as transportation and aid issues. It is all …

Peddlers In Means Of Public Transportation In Egypt A Discussion Of Policy Options/ الباعة المتجولين في وسائل النقل العام في مصر: نقاش حول بدائل السياسات, Dina Ahmed Ali, Shatha El Sherif, Zainab Mahmoud Taha

Papers, Posters, and Presentations

The Metro and railway stations play crucial roles in Greater Cairo. Most working-class residents use the Metro and trains as the main transport means to reach their workplace. The Metro carries around 4 million passengers daily, whereas the railways take around 1.4 million passengers per day (Saif Eldien, 2019).

This policy paper is tackling the issue of the informal transportation peddlers namely in the Metro (subway) and railway stations. The authors dealt with this kind of informal peddlers as an occupational segment of the society that contributes to the national economy rather than groups of people who are distorting the …

Pedestrians Under Attack, Michael Lewyn

Scholarly Works

A review of Right Of Way by Angie Schmitt

Applying Data-Driven Multimodal Speed Management Strategies For Safe, Efficient Transportation, Yao-Jan Wu, Xianfeng Yeng, Sirisha Kothuri

TREC Project Briefs

How can we use a variety of data-driven speed management strategies to make transportation safer and more efficient for all modes–whether you’re driving, walking or taking transit? The project was led by Yao Jan Wu, director of the Smart Transportation Lab at the University of Arizona. Co-investigators were Xianfeng Terry Yang of the University of Utah, who researches traffic operations and modeling along with connected automated vehicles, and Sirisha Kothuri of Portland State University, whose research has focused on improving signal timing to better serve pedestrians. “We want to improve mobility for all users, be it pedestrians, vehicle drivers or …

Risk Factors For Workplace Sexual Harassment In Female Truck Drivers, Kimberly Marie Riddle

Theses and Dissertations--Nursing

Sexual harassment is one of the most common forms of workplace violence in the United States. Sexual harassment is defined as unwanted verbal and physical behaviors of a sexual nature (e.g., physical advances, requests for sexual favors, inappropriate sexist or sexual comments or jokes, pornography, or other unwanted conduct) that creates an uncomfortable working environment or interferes with the employee’s job responsibilities. In general, it is estimated that nearly one in every two women have experienced sexual harassment at the workplace over their lifetime. In male-dominated occupations, such as truck driving, law enforcement, firefighting, and construction, females may have a …

Zone Path Construction (Zac) Based Approaches For Effective Real-Time Ridesharing, Meghna Lowalekar, Pradeep Varakantham, Patrick Jaillet

Research Collection School Of Computing and Information Systems

Real-time ridesharing systems such as UberPool, Lyft Line and GrabShare have become hugely popular as they reduce the costs for customers, improve per trip revenue for drivers and reduce traffic on the roads by grouping customers with similar itineraries. The key challenge in these systems is to group the “right” requests to travel together in the “right” available vehicles in real-time, so that the objective (e.g., requests served, revenue or delay) is optimized. This challenge has been addressed in existing work by: (i) generating as many relevant feasible combinations of requests (with respect to the available delay for customers) as …

Difference In Travel Behavior Between Immigrants In The U.S. And U.S. Born Residents: The Immigrant Effect For Car-Sharing, Ride-Sharing, And Bike-Sharing Services, Sangwan Lee, Michael J. Smart, Aaron Golub

Urban Studies and Planning Faculty Publications and Presentations

Understanding immigrants’ travel behavior is important to transportation planners and policymakers working to implement better transportation planning and public policies to serve those needs. The recent changes to the transportation system, specifically, the recent emergence of shared mobility services, such as car‐sharing, ride‐ sharing, and bike‐sharing, may have resulted in changes in how immigrants travel. Thus, we explored two research questions: (1) whether immigrants in the U.S. are more likely to rely on the three newly emerging transportation modes than US‐born persons, and (2) whether the assimilation theory can be applied to the modes. To answer these questions, we used …

Maritime Surveillance In The Gulf Of Suez : Identifying Opportunities For Future Improvements, Esslam Hassan, Dimitrios Dalaklis

Conference Papers

The Gulf of Suez (GOS) is one of the most important waterways in the world. Furthermore, issues like maritime safety, avoidance of accidents and effective conduct of navigation, as well as protection of the marine environment in the GOS are always among the highest priorities of Egyptian legislators. As a result, maritime surveillance in the area under discussion is facilitated by a technologically advanced Vessel Traffic Management System (VTMS) that has been established by the competent authority as a cost-effective measure to reduce and mitigate risks in accordance with international standards and guidelines. The main aim of this paper is …

Data Files: Bi-Objective Optimization For Battery Electric Bus Deployment Considering Cost And Environmental Equity, Xiaoyue Cathy Liu, Yirong Zhou, Ran Wei, Aaron Golub

TREC Datasets and Databases

This data supports the research project Bi-objective Optimization for Battery Electric Bus Deployment Considering Cost and Environmental Equity and a final report published on NITC’s website.

Dataset collected through multiple sources and organized into different formats including CSV format, JSON format, shapefile and code repository.

Context: The research project develops a bi-objective model that aims to help transit agencies to optimally deploy BEB while considering both capital investment and environmental equity. The unique spatio-temporal characteristic of BEB system, charging limitations (on-route and in-depot charging), and operational constraints are also considered and incorporated into the model.

Extending Open Mobility To Mobility Data Justice: A Localized Case Study Of Gtfs-Oriented (Infra)Activism In Defense Of The Mobile-Digital Commons, David Moran

Electronic Theses and Dissertations, 2020-2023

Through a humanist lens, this research aims to conceptualize a Mobility Data Justice (MDJ) framework that re-orients both GTFS open transit data (General Transit Feed Specification) and transit rider activists towards collaborative Mobility Data Justice tactics. Transit riders and activists, in the age of Uberfication, have to account for and navigate the dynamics of how Big Data and platform economies are not only augmenting but co-opting political decision-making processes about public transit policy, planning and investment. Building on mobility justice and data justice theorists, I examine how the GTFS open data ecosystem can be operationalized via justice ontologies to support …

Strategies To Decrease Disorder And Diminishing Transit Ridership Through Fare Enforcement, Stephen Matthew Boehm

Walden Dissertations and Doctoral Studies

AbstractUrban rail transit systems are experiencing a decrease in ridership in part due to the perception of increased crime and disorder. To ensure passengers continue riding rail transportation, agency leaders must develop strategies to decrease crime and disorder caused by fare evasion. Grounded in the Kano model and Lean Six Sigma, the purpose of this qualitative case study was to explore strategies urban rail transit leaders use to reduce declining ridership associated with a perceived disorder caused by fare evasion. Data were collected using semistructured interviews of six urban rail transit leaders who manage fare enforcement efforts and a review …

Evaluating Financing Mechanisms And Economic Benefits To Fund Grade Separation Projects, Shailesh Chandra, Mehran Rahmani, Timothy Thai, Vivek Mishra, Jacqueline Camacho

Mineta Transportation Institute

Investment in transportation infrastructure projects generates benefits, both direct and indirect. While emissions reductions, crash reductions, and travel time savings are prominent direct benefits, there are indirect benefits in the form of real estate enhancements that could pay off debt or loan incurred in the improvement of the infrastructure itself. Studies have shown that improvements associated with rail transportation (such as station upgrades) trigger an increase in the surrounding real estate values, increasing both the opportunity for monetary gains and, ultimately, property tax collections. There is plenty of available guidance that provides blueprints for benefits calculations for operational improvements in …

Digital Disruption Solution For Airlines In Brazil, Camila Bisinoto Borges, Cristiane Lunardi Das Neves Rodrigues, Daniel Dias Landroni, Tatiane Mendonça, Leila Halawi

Publications

Since March 2017, the cost of denied boarding began to draw all Brazilian airlines' attention because of the Resolution 400 of the Brazilian National Civil Aviation Agency. This Resolution covers several items, but we will focus on the penalty that the airlines need to pay for each passenger who had his boarding denied involuntarily in domestic flights. Our goal is to create a plugin that any airline could use in their self-service check-in channels and direct communication with the passenger. It could also become a way to offer proactive accommodation options and monetary compensations due to itinerary or ticket schedule …

Exploring And Visualizing Spatial Effects And Patterns In Ride-Sourcing Trip Demand And Characteristics, Bishoy Kelleny, Sherif Ishak

Civil & Environmental Engineering Faculty Publications

The complex demand pattern of ride-sourcing remains to be a challenge to transportation modeling practitioners due to the infancy and the inherently dynamic nature of the ride-sourcing system. Spatial effects exploration and analysis protocols can provide informative insights on the underlying structure of demand and trip characteristics. Those protocols can be thought of as an opportunistic strategy to alleviate the complexity and help specifying the appropriate econometric models for the system. Spatial effects exploration is comparable to point pattern analysis, in which, signals from spatial entities, like census tracts, can be analyzed statistically to reveal whether a specific phenomenon respective …

Online Bus Speed Prediction With Spatiotemporal Interaction: A Laplace Approximation-Based Bayesian Approach, Haipeng Cui, Kun Xie, Bin Hu, Hangfei Lin

Civil & Environmental Engineering Faculty Publications

This study proposes a novel Bayesian hierarchical approach for online bus speed prediction by explicitly accounting for the spatiotemporal interaction (STI) of speed observations. The use of Laplace approximation can expedite the estimation of Bayesian models and enable the implementation of online prediction. Large numbers of trials are carried out to identify significant predictors and the optimal length of the look-back time window to achieve the highest prediction accuracy. The spatiotemporal interacting patterns are also explored, and results show that the Type IV model assuming the structured spatial effect interacts with the structured temporal effect can best accommodate the bus …

Modeling And Simulation Of Cascading Failures In Transportation Systems During Hurricane Evacuations, Yuan Zhu, Kaan Ozbay, Hong Yang, Fan Zuo, Di Sha

Computational Modeling & Simulation Engineering Faculty Publications

Effective and timely evacuation is critical in alleviating the impact of hurricanes. As such, evacuation models are often sought to support the preparedness of evacuations. One important task in the modeling process is to evaluate exogenous factors that cause transportation system capacity loss during evacuation. Typical factors include direct damage to the roadway network due to storm surge and cascading impacts because of other facilities failures. For example, power outage can lead to signal failure and subway suspension. This paper aims to develop a macroscopic simulation-based approach to study the capacity loss of the roadway network in evacuation due to …

Time Domain Boundary Element Method Prediction Of Noise Shielding By A Naca 0012 Airfoil, Douglas M. Nark, Fang Q. Hu

Mathematics & Statistics Faculty Publications

As aircraft noise constraints become more stringent and the number/mixture of aircraft configurations grows, it becomes more important to understand the interaction of individual aircraft noise sources with nearby aircraft structures. Understanding these interactions and exploring possible approaches to mitigate or exploit their acoustic impact is essential for overcoming key noise barriers. This paper describes the further validation of a time domain boundary element approach for the prediction of the interactions between incident noise sources and nearby aircraft structures. Predictions were completed for multiple source locations and comparisons of these results with measured data are presented. Overall, very good agreement …

Conceptual Development Of A Probabilistic Graphical Framework For Assessing Port Resilience, Katherine Smith, Rafael Diaz, Yuzhong Shen, Francesco Longo

VMASC Publications

Technological advances such as cyber physical systems and autonomous vehicles combined with increased disruptions including the Covid-19 pandemic and coastal natural disasters have heightened the importance of port risk analysis methodologies and frameworks that can accurately quantify and optimize resilience. This work presents the conceptual development of a novel combination of analysis methodologies linking a probabilistic graphic approach on a network of risk events with a functional dependency approach on a system network. Key advantages of these two methodologies are the ability to model and learn causal interactions rather than simply correlations and a high level of computational efficiency. This …

How American Transit Agencies Determine Fare Policy: It All Comes Down To Politics, Julian Thesseling

CMC Senior Theses

This paper will provide readers with an understanding of the variables that US transit agencies grapple with when developing fare policy, with a particular focus on the political process. The framework chapter will examine the objectives of public transportation and how agencies face difficulties in achieving these objectives. While this paper will focus on American transportation policy, the framework will draw from the experiences of cities across the world. Three case study chapters will then each discuss an American city or region’s approach to fare policy, and how variables have either complicated or enhanced agencies’ ability to develop effective fare …

Workshop Outcomes Report: 1st International Workshop On Seismic Resilience Of Arctic Infrastructure And Social Systems, Majid Ghayoomi, Katharine Duderstadt, Alexander Kholodov, Alexander Shiklomanov, Matthew Turner, Elham Ajorlou

Faculty Publications

No abstract provided.

Numerical Investigations Of Transient Wind Shear From Passing Vehicles Near A Road Structure (Part I: Unsteady Reynolds-Averaged Navier-Stokes Simulations), Hamid Rahai, Assma Begum

Mineta Transportation Institute

In this research, the authors performed unsteady numerical simulations of a moving Ahmed body under a freeway overpass at different distances from the bridge columns in order to evaluate transient wind shear and the wind load on these columns. Results have shown that when the vehicle is at 0.75W distance from the bridge columns, an unsteady wind speed of up to 24 m/s is observed at the columns with a pressure coefficient difference of 0.9. Here W is the width of the vehicle. These results indicate with an appropriate system for harnessing these wind energy potentials, significant renewable electric power …

Developing Guidelines For Assessing The Effectiveness Of Intelligent Compaction Technology, Mehran Mazari, Siavash F. Aval, Siddharth M. Satani, David Corona, Joshua Garrido

Mineta Transportation Institute

Many factors affect pavement compaction quality, which can vary. Such variability may result in an additional number of passes required, extended working hours, higher energy consumption, and negative environmental impacts. The use of Intelligent Compaction (IC) technology during construction can improve the quality and longevity of pavement structures while reducing risk for contractors and project owners alike. This study develops guidelines for the implementation of IC in the compaction of pavement layers as well as performing a preliminary life-cycle cost analysis (LCCA) of IC technology compared to the conventional compaction approach. The environmental impacts of the improved construction process were …

Tod And Park-And-Ride: Which Is Appropriate Where?, John Niles, J.M. Pogodzinski

Mineta Transportation Institute

Despite the sharp drop in transit ridership throughout the USA that began in March 2020, two different uses of land near transit stations continue to be implemented in the United States to promote ridership. Since 2010, transit agencies have given priority to multi-family residential construction referred to as transit oriented development (TOD), with an emphasis on housing affordability. In second place for urban planners but popular with suburban commuters is free or inexpensive parking near rail or bus transit centers, known as park-and-ride (PnR). Sometimes, TOD and PnR are combined in the same development. Public policy seeks to gain high …

Using Beam Software To Simulate The Introduction Of On-Demand, Automated, And Electric Shuttles For Last Mile Connectivity In Santa Clara County, Gary Hsueh, David Czerwinski, Cristian Poliziani, Terris Becker, Alexandre Hughes, Peter Chen, Melissa Benn

Mineta Transportation Institute

Despite growing interest in low-speed automated shuttles, pilot deployments have only just begun in a few places in the U.S., and there is a lack of studies that estimate the impacts of a widespread deployment of automated shuttles designed to supplement existing transit networks. This project estimated the potential impacts of automated shuttles based on a deployment scenario generated for a sample geographic area: Santa Clara County, California. The project identified sample deployment markets within Santa Clara County using a GIS screening exercise; tested the mode share changes of an automated shuttle deployment scenario using BEAM, an open-source beta software …

Important Not To Let Hsr Termination Hobble Further Cooperation, Tan K. B. Eugene

Research Collection Yong Pung How School Of Law

Strong people-to-people ties can help temper political histrionics, moderate negative impact on political ties. The tantalising prospect of being able to leave Singapore and arrive in Kuala Lumpur in just 90 minutes remains a pipe dream after the High Speed Rail (HSR) agreement was terminated last Friday, along with what could have been an important confidence booster to bilateral ties between Singapore and Malaysia.

Public Transit Infrastructure And Heat Perceptions In Hot And Dry Climates, Yuliya Dzyuban, David M. Hondula, Paul J. Coseo, Charles L. Redman

Research Collection College of Integrative Studies

Many cities aim to progress toward their sustainability and public health goals by increasing use of their public transit systems. However, without adequate protective infrastructure that provides thermally comfortable conditions for public transit riders, it can be challenging to reach these goals in hot climates. We took micrometeorological measurements and surveyed riders about their perceptions of heat and heat-coping behaviors at bus stops with a variety of design attributes in Phoenix, AZ, USA, during the summer of 2018. We identified the design attributes and coping behaviors that made riders feel cooler. We observed that current infrastructure standards and material choices …