Transportation Commons^™

A Comparative Study: Utilizing Data Mining Techniques To Classify Traffic Congestion Status, Abbas Mirakhorli

UNLV Theses, Dissertations, Professional Papers, and Capstones

Performance measure is a process of evaluating and quantifying a system. Performance measure provides us with information about how good a system is working and how well the predefined goals are met. In order to analyze the performance of a transportation system, the traffic data such as speed, volume, occupancy and travel time of the system need to be collected. These data will generate valuable historical database that can be used to develop models to improve the quality of service of transportation system. The performance measures in transportation studies can be categorized to following main groups: Congestion, Mobility, Accessibility, Reliability, …

City Of North Las Vegas Complete Streets Corridor Ranking Study Evaluation, Yasmin Dixon, Brianna Lawrence, Sarah Saenz, Imari Thompson

UNLV Theses, Dissertations, Professional Papers, and Capstones

A Complete Street is a corridor that is accessible by all users and modes of transportation; it promotes livability and economic vitality in the surrounding community, and is a new approach to improving transportation networks. Prior to the implementation of Complete Streets projects, cities conduct corridor ranking studies to determine potential project locations. The City of North Las Vegas Planning Department (CNLV) is currently working on a corridor ranking study in partnership with the Regional Transportation Commission (RTC) and an external consulting group, Atkins International (Atkins). This is the first Complete Streets planning study for the City of North Las …

A Fast Decomposition Approach For Traffic Control, Xiaocheng Tang, Sébastien Blandin, Laura Wynter

Research Collection School Of Computing and Information Systems

Real-time road traffic control has been the subject of active research efforts for more than fifty years. In recent years, however, the convergence of ubiquitous sensing with seamless communication technologies has motivated the development of more computationally efficient control methods, able to operate in real-time in a live environment. In this work, we present a fast decomposition method for network optimization problems, with application to real-time traffic control. Our approach is based on a nonlinear programming formulation of the network control problem and consists of an alternating directions method using forward numerical simulation in place of one of the optimization …

Numerical Simulations Of Traffic Flow Models, Puneet Lakhanpal

UNLV Theses, Dissertations, Professional Papers, and Capstones

Traffic flow has been considered to be a continuum flow of a compressible liquid having a certain density profile and an associated velocity, depending upon density, position and time. Several one-equation and two-equation macroscopic continuum flow models have been developed which utilize the fluid dynamics continuity equation and help us find analytical solutions with simplified initial and boundary conditions. In this thesis, the one-equation Lighthill Witham and Richards (LWR) model combined with the Greenshield's model, is used for finding analytical and numerical solutions for four problems: Linear Advection, Red Traffic Light turning into Green, Stationary Shock and Shock Moving towards …

Combined Traction And Energy Recovery Motor For Electric Vehicles, James Long, Xin Wang, Claude Kansaku, Brian Moravec

TREC Final Reports

Electric vehicle manufacturers are looking for ways to optimize energy use for vehicle range extension and reduction of battery capacity. Electric motors have lower efficiencies at very low speed and high torque. This is typically at vehicle launch from standstill, at very low speeds, and during energy regeneration at lower speeds and approaching standstill. The KersTech solution is a breakthrough technology allowing supplement of the electric drive with a hydraulic drive, active in lower speeds ranges, dropping out as the electric motor takes over in its higher efficiency range of operation. The report consists of four parts. Part I presents …

Assessing Transit Fare Equity In Utah Using A Geographic Information System, Steven Farber, Keith Batholomew, Xiao Li, Antonio Paez, Khandker M. Nurul Habib

TREC Final Reports

The goal of this study is to develop and apply a new method for assessing social equity impacts of distance-based public transit fares. Shifting to a distance-based fare structure can disproportionately favor or penalize different subgroups of a population based on variations in settlement patterns, travel needs, and most importantly, transit use. According to federal law, such disparities must be evaluated by the transit agency, but the area-based techniques identified by the Federal Transit Authority for assessing discrimination fail to account for disparities in distances travelled by transit users. This means that transit agencies currently lack guidelines for assessing the …

Field To Flight: A Techno-Economic Analysis Of Stover To Aviation Biofuels Supply Chain, Amanda C. Bittner

Open Access Theses

Greenhouse gas emissions have been a growing concern. The transportation sector contributes to one-third of GHG emissions in the United States from fossil fuel burning. The Renewable Fuel Standard set a requirement for 16 billion gallons (ethanol equivalent) of cellulosic biofuels to be used in the market. Aviation biofuels can help to meet both of these problems as well as improve U.S. energy security.

Investment in the biofuel industry carries a lot of risk. The biofuel industry is run by the private sector, but can be incentivized by government. Cellulosic biofuels carry even more risk than first generation biofuels, because …

Systems For Delivering Electric Vehicle Data Analytics, Vamshi Krishna Bolly

Open Access Theses

n the recent times, advances in scientific research related to electric vehicles led to generation of large amounts of data. This data is majorly logger data collected from various sensors in the vehicle. It is predominantly unstructured and non-relational in nature, also called Big Data. Analysis of such data needs a high performance information technology infrastructure that provides superior computational efficiency and storage capacity. It should be scalable to accommodate the growing data and ensure its security over a network. This research proposes an architecture built over Hadoop to effectively support distributed data management over a network for real-time data …

Accessibility-Based Transportation Planning: Literature And Applications For Shrinking Cities, Joanna Ganning

TREC Final Reports

For 15 years, scholars have claimed that accessibility-based transportation planning was at the brink of becoming a new paradigm, and yet this hope remains unrealized. Its implementation may lag due to vague definitions when compared to mobility, or because those who would benefit from accessibility-based planning lack political power to rally its support. Possibly, the lag in implementation reflects the missing linkages between theory and application for many contexts. This literature review synthesizes knowledge regarding the applications for accessibility-based transportation planning for shrinking cities along the themes of environmental, social, and economic sustainability. While residents in shrinking cities might especially …

Do Tods Make A Difference? Max Yellow Line Portland, Oregon, Jenny H. Liu, Zakari Mumuni, Matt Berggren, Matt Miller, Arthur C. Miller, Reid Ewing

Urban Studies and Planning Faculty Publications and Presentations

This analysis was intended to help answer the following policy questions:

Q1: Are TODs attractive to certain NAICS sectors?
Q2: Do TODs generate more jobs in certain NAICS sectors?
Q3: Are firms in TODs more resilient to economic downturns?
Q4: Do TODs create more affordable housing measured as H+T?
Q5: Do TODs improve job accessibility for those living in or near them?

The first question investigates which types of industries are actually transit oriented. Best planning practices call for a mix of uses focused around housing and retail, but analysis provides some surprises. The second question tests the economic development …

Do Tods Make A Difference? Ns Streetcar Line Portland, Oregon, Jenny H. Liu, Zakari Mumuni, Matt Berggren, Matt Miller, Arthur C. Nelson, Reid Ewing

Urban Studies and Planning Faculty Publications and Presentations

This analysis was intended to help answer the following policy questions:

Q1: Are TODs attractive to certain NAICS sectors?
Q2: Do TODs generate more jobs in certain NAICS sectors?
Q3: Are firms in TODs more resilient to economic downturns?
Q4: Do TODs create more affordable housing measured as H+T?
Q5: Do TODs improve job accessibility for those living in or near them?

The first question investigates which types of industries are actually transit oriented. Best planning practices call for a mix of uses focused around housing and retail, but analysis provides some surprises. The second question tests the economic development …

Seminar #294: Transforming Transportation Through Connectivity, Robert L. Bertini

PSU Transportation Seminars

The transportation system is the backbone of the United States' economy, and transportation is an essential part of everyday life for American citizens. It is essential that the transportation system continue to provide accessibility and connectivity to an ever-evolving global economy. A key way to do so is to embrace, develop and implement new technologies. One of the newest and most promising facets of transportation-related technology is in the field of connected mobility. The vision behind connected mobility is of a transportation system where vehicles, travelers, and infrastructure are all wirelessly connected with one another and able to transmit real-time …

Participation, Information, Values, And Community Interests Within Health Impact Assessments, Nicole Iroz-Elardo

Dissertations and Theses

Health impact assessment (HIA) has emerged in the U.S. as one promising process to increase social and environmental justice through addressing health equity issues within planning. HIA practice is guided by values such as democracy and equity and grounded in broad social determinants of health. The most readily applied definition of democracy is problematic because it implies an element of direct, participatory engagement with the public. This is at odds with HIA practice that largely relies on stakeholder engagement strategies.

This dissertation critically examines the engagement strategies of three transportation planning HIA cases to more fully understand how the HIA …

Opportunities And Challenges Of Data Publication: A Case From Purdue, David Scherer, Lisa Zilinski, Courtney Matthews

Charleston Library Conference

Beginning in 2011, there have been several policy changes directly affecting the management, preservation, and accessibility of publically funded research and resulting research data in the United States. On January 18, 2011 the National Science Foundation (NSF) required data management plans to be submitted with all grant proposals (National Science Foundation, 2013). On February 22, 2013, the Office of Science and Technology Policy of the President of the United States extended a similar requirement to all federal agencies that have a research and development budget of more than $100 million (Holdren, 2013). These requirements illustrate the need for further coordination …

Lessons From Lived Experience: From Fresh Insights To Effective Action, Lisa Deangelis, Maureen A. Scully, Andrea Wight

Emerging Leaders Program Team Projects

The 34 fellows in the 2014 Emerging Leaders Program worked with community partners to generate the theme, “Learning from Lived Experience: From fresh insights to effective action." Each year, the projects draw upon a theme or lesson from the prior year. Last year and this year, fellows saw how the lived experiences of both their stakeholders and themselves generated nuanced and appropriate approaches to problem-solving. The fellows worked with six community partners, giving their time and professional skills to understand how to frame complex social challenges, engage new partners and resources, and sharpen strategic plans. They conducted surveys, interviews, open …

Analyses Of Bus Travel Time Reliability And Transit Signal Priority At The Stop-To-Stop Segment Level, Wei Feng

Dissertations and Theses

Transit travel time is affected by many factors including traffic signals and traffic condition. Transit agencies have implemented strategies such as transit signal priority (TSP) to reduce transit travel time and improve service reliability. However, due to the lack of empirical data, the joint impact of these factors and improvement strategies on bus travel time has not been studied at the stop-to-stop segment level.

This study utilizes and integrates three databases available along an urban arterial corridor in Portland, Oregon. Data sources include stop-level bus automatic vehicle location (AVL) and automatic passenger count (APC) data provided by the Tri-County Metropolitan …

Continuous Data Integration For Land Use And Transportation Planning And Modeling, Liming Wang, Kihong Kim

TREC Final Reports

There is an urgent need for improved models that address the interdependencies between land use and transportation, and considerable new work is underway to develop such models in Oregon and elsewhere. These models and planning practices to integrate land use into the process, however, require the integration of massive amounts of land use data that is messy and incomplete. There have been considerable advances in the treatment of such data problems in other domains, drawing on data mining and machine-learning techniques to address issues in various domains. To date, however, little systematic effort has applied these technological advances to the …

Evaluation Of Advanced Traffic Control Systems, Miguel Figliozzi

TREC Project Briefs

Researchers from Portland State University develop performance measures and algorithms for evaluation of state-of-the-art traffic signal control technologies..

Overtime Traffic Enforcement Evaluation: A Methodology For Selecting Agencies And Enforcement Periods, Dario Enrique Romero Santana

Masters Theses

Multiple studies have stated the advantages of police traffic enforcement on crash reduction (Zaidel, February 2002). It is very important to identify locations and time periods where police enforcement produces the greatest crash reductions. The objectives of this study were to: (1) determine the impact of overtime traffic enforcement on crash occurrence; (2) develop procedures to identify police agencies with potential to reduce targeted crashes; and (3) develop procedures to identify additional time periods in which enforcement activities should be conducted. In order to accomplish these objectives, many methodologies were explored. The study used crash and enforcement data collected by …

Salem-Keizer Transit Flexible Service Plan, Darwin Moosavi, Brenda Martin, Cj Doxsee, Mike Sellinger, Lauren Wirtis, Matt Berggren

Master of Urban and Regional Planning Workshop Projects

Capturing the Ride is an exploration of flexible transportation options for low-density communities in Salem and Keizer. The current transit system does not serve Keizer, South Salem, and West Salem well; each of these communities has areas with limited or no access to current bus routes. The project intends to provide a service that will better meet the communities’ transit needs than the current system. Over a five-month planning process, Paradigm Planning conducted extensive research and reached out to the public in Keizer, South Salem, and West Salem (herein referred to as the study areas) to determine what kind of …