Transportation Commons^™

Traffic Modeling In Lagrangian Coordinates Using Smartphone Apps, Sergio Contreras

UNLV Theses, Dissertations, Professional Papers, and Capstones

Traditionally, one of the ways traffic flow has been studied is by using the kinematic wave model. This model is derived in the Eulerian framework by using conservation of the number of vehicles. Recently, the kinematic wave model has been transformed into Lagrangian coordinates. In this framework, the independent variables are unique

vehicles and time. The detailed change in framework, and the properties of the model in the changed framework are reviewed. Numerical results from different traffic cases are explained. Since vehicle trajectory data can be easily collected from smartphones,

a smartphone application is developed for this purpose. This data …

Calibration Of Traffic Flow Models, Victor Molano

College of Engineering: Graduate Celebration Programs

This study proposes a methodology to calibrate microscopic traffic flow simulation models. A Simultaneous Perturbation Stochastic Approximation (SPSA) algorithm searches for the set of model parameters that minimizes the difference between actual and simulated values

Modeling Long Term Impacts Of Freeway Traffic Incidents On Travel Time Reliability, Vidhya Kumaresan, Mohamed S. Kaseko

College of Engineering: Graduate Celebration Programs

The objective of this study is to calibrate models of relationships between Travel Time Reliability measures and incident and traffic characteristics for a given highway segment.

Development Of A Smart Application For Police Crash Reports, Sebastien Bonnet, Victor Molano, Alexander Paz

College of Engineering: Graduate Celebration Programs

• Gaining a significant amount of time to help police work
• Developing a User Friendly Interface
• Optimizing the GPS Gaining a significant amount of time to help police work
• Developing a User Friendly Interface
• Optimizing the bar code scan technology
• Application for MC 75 mobile technology

Investigation Of Crashes And Identifying The Best Practices For Setting Up Speed Zones In Towns Along Rural Highways In Nevada, Krishna Shrestha

College of Engineering: Graduate Celebration Programs

• To determine the factors associated with crashes
• To determine the factors that affect a speed limit
• To identify the best practices used by other state DOTs when setting up
  speed zones in towns along their rural highways
• To provide recommendations for preparing speed-zone guideline in towns
  along the rural highways in Nevada

Effects On Compliance Of A Hawk Signal In Las Vegas, Mukesh Khadka, Naveen Veeramisti, Alexander Paz, Brendan Morris

College of Engineering: Graduate Celebration Programs

In 2010, 806 crashes involving pedestrians occurred in Nevada; 36 were fatalities and 796 were injuries. Although numerous pedestrian safety countermeasures exist in Las Vegas, NV it was ranked as the 6th most dangerous large metropolitan area in the U.S. So, additional and more effective safety countermeasures were required to reduce pedestrian crashes in Las Vegas. High-intensity Activated crossWalK (HAWK) signal has been identified as a potential mechanism to reduce crashes. This study evaluates the effectiveness of such signal installed at E. Sahara Avenue, Las Vegas. Data was collected from videos captured by two cameras facing eastbound and westbound for …

A Visualization Tool For A Highway Safety Management System, Indira Khanal, Naveen Veeramisti, Justin Baker, Alexander Paz

College of Engineering: Graduate Celebration Programs

• With lot of research, Federal Highway Administration
  has released a highway Safety management System
  software called as SafetyAnalyst (SA)
• SA has a suite of analytical tools to identify and
  manage system-wide safety improvements:
  Network Screening
  Diagnosis and Countermeasure Selection
  Economic Analyses and priority Ranking
  Countermeasure Evaluation
• SA provides a very rudimentary approach to display
  results just in tabular and textual format
• This study proposes a visualization tool that expands
  the output capabilities provided by SafetyAnalyst

Development Of A Comprehensive Database System For A Highway Safety Engineering And Management, Naveen Veeramisti, Justin Baker, Indira Khanal, Kenny Moupita, Alexander Paz

College of Engineering: Graduate Celebration Programs

In simple words, the objective of this study is to develop a comprehensive database system to provide a data for highway safety engineering and management.

Police Injury Crashes And The Intersections Of Policy, Technology, And Culture, Carol Servino

Graduate Research Symposium (2010 - 2017)

Motor vehicle crashes caused the majority fatalities to police officers in the U. S. for more than a decade, yet little is known about factors contributing to injury crashes. This research project required original data collection. A national survey of police chiefs in state, county, and local agencies of all sizes was conducted online in June and July, 2012. Questions focused on various driving policies and practices, including those related to communication technology commonly used in police patrol vehicles. Other questions included hypothetical situations to explore the culture of driving safety in individual police organizations. The majority of chiefs clearly …

Making Transportation Options Possible, Ronald S. Lembke, Dale S. Rogers

Journal of Transportation Management

Transportation options provide the buyer the right, but not the obligation, to buy or sell transportation capacity at a future date. These options can provide shippers, carriers and logistics companies a significant opportunity to reduce risks and increase capacity flexibility. This paper summarizes some of these benefits, describes a number of issues to be resolved before trading transportation options can become a reality, and presents possible resolutions for these issues.

Back Matter, Journal Of Transportation Management Editors

Journal of Transportation Management

No abstract provided.

Transport And Health: A Look At Three Latin American Cities, Janeth Mosquera Becerra, Rodrigo S. Reis, Lawrence D. Frank, Farah A. Ramirez-Marrero, Benjamin Welle, Eugenio Arriaga Cordero, Fabian Mendez Paz, Carlos J. Crespo, Veronica Dujon, Enrique Jacoby, Jennifer Dill, Lynn Weigand, Carlos M. Padin

Community Health Faculty Publications and Presentations

Transport is associated with environmental problems, economic losses, health and social inequalities. A number of European and US cities have implemented initiatives to promote multimodal modes of transport. In Latin America changes are occurring in public transport systems and a number of projects aimed at stimulating non-motorized modes of transport (walking and cycling) have already been implemented. Based on articles from peer-reviewed academic journals, this paper examines experiences in Bogota (Colombia), Curitiba (Brazil), and Santiago (Chile), and identifies how changes to the transport system contribute to encourage active transportation. Bus rapid transit, ciclovias, bike paths/lanes, and car use restriction are …

Tls Newsletter Volume 7, Edition 7. April, 2013, Unf Transportation And Logistics Society

Transportation & Logistics Society Newsletter

Inside this newsletter: TLS Meeting on Wednesday April 3. TLS President's Corner. Upcoming Events. Technology Careers for Transportation and Logistics Graduates. Get to know TLS Assistant recruitment director Michael Kalin. Life After Graduation with Ben Richards.

A Decision Support System For Developing The Managerial Policy Of Urban Paratransit Services: A Case Study Of The Massachusetts Bay Transit Authority, Emanuel Melachrinoudis, Hokey Min, Candace Selneck

Journal of Transportation Management

In the wake of the Americans with Disability Act (ADA) of 1990, paratransit services were offered to improve mobility, employment opportunities, and access to community services for individuals who are mentally or physically handicapped. Due to the complexity involved in ADA rules and transportation regulations as well as the customized, on-demand service requirements, paratransit services are far more costly to render than fixed-route based mass transit services. In times of ongoing budget crisis among public entities, many public transit authorities cope with a dilemma of meeting the growing demand and complex service requirements, while controlling rising paratransit costs. Considering this …

Development, Deployment, And Assessment Of A New Educational Paradigm For Transportation Professionals And University Students, Christopher M. Monsere

TREC Final Reports

Traditionally, engineering coursework has been delivered in a lecture-based format with accompanying exercises assigned for time outside of class. The activity-based approach to learning aims to keep students engaged in and responsible for their own learning processes. This approach has been shown to be more effective than conventional teaching approaches in terms of long-term retention of the educational material.

The Evolving Relationship Between Airline Profitability And Passenger Satisfaction, Kent N. Gourdin

Journal of Transportation Management

This paper examines the ongoing evolution of the U.S. airline industry under deregulation. After losing money for most of the past 35 years, carriers have made structural changes to their business models that have proven to be, at least in the short term, very profitable. After delineating these management actions, the paper examines their impact on passengers. The author utilizes the Service Quality Model to analyze the long-term implications of this new operating paradigm for passenger satisfaction. Based on this analysis the paper goes on to suggest several actions management could take to improve satisfaction. Finally, conclusions are offered and …

U.S. Motor Carrier Hours Of Service Regulations: Their Impact On Carrier Profitability And Productivity, Ahren Johnston

Journal of Transportation Management

This paper discusses the history of hours of service regulations for U.S. motor carriers and investigates the changes to individual carrier profitability and productivity from the last major change to those regulations in 2003. The results of the analysis indicate that operating ratio worsened and sales per employee improved, and return on assets and return on equity were unchanged due to hours of service changes. The implications of these results given the recent changes to hours of service regulations in 2011 are also discussed.

An Empirical Cross Cultural Assessment Of A Logistics/Supply Chain Management Typology, Michael A. Mcginnis, Ali Kara, John E. Spillan

Journal of Transportation Management

This manuscript compares the three dimensions (Process Strategy, Market Strategy, and Information Strategy) of the Bowersox Daugherty (1987) logistics strategy typology among five disparate countries by integrating the findings of previous empirical research. The appropriateness of the three Bowersox/Daugherty dimensions when combined into the construct Overall Logistic Strategy (OLS) are assessed. The role of OLS impact on Organizational Competitiveness (COMP) through two intervening variables LCE (Logistics Coordination Effectiveness) and CSC (Customer Service Commitment) is evaluated. The findings indicate that OLS is an appropriate descriptor of logistics/ supply chain management in a wide range of cultures and that the integration of …

Methods To Develop A Crediting Strategy For Transportation And Metropolitan Planning Agencies: White Paper, James S. Kagan, Lisa Gaines

Institute for Natural Resources Publications

The focus of this paper is to identify the ways in which the Ecosystem Services Crediting methodology, part of the Integrated Ecological Framework (IEF), could be developed to make it easily usable and meaningful to transportation agencies. IEF is an ecological assessment process and framework to integrate conservation planning and transportation planning.

Reducing Seismic Risk To Highway Mobility: Assessment And Design Examples For Pile Foundations Affected By Lateral Spreading, Scott A. Ashford, Michael H. Scott, Deepak Rayamajhi

TREC Final Reports

Damage in pile supported structures due to liquefaction and liquefaction induced deformation were reported in past earthquakes around the world (e.g., Ansal et al. 1999; Seed et al. 1990; EERI 2010, EERI 2011; GEER 2010a, GEER 2010b, GEER 2011). For example, a reconnaissance report from a recent subduction zone event, the 2010 Chile earthquake (Mw=8.8), showed the pervasive nature of liquefaction and liquefaction-induced lateral spreading damage to bridge foundations (GEER 2010a, Yen et al. 2011). In terms of seismic hazard, the Pacific Northwest shares similar conditions from a Cascadia Subduction Zone (CSZ) earthquake source with the expected earthquake magnitude of …