Transportation Commons^™

Unlocking The Landlocked : Appraising The Economic Viability Of Dry Ports For Zimbabwe, Blessing Charuka

World Maritime University Dissertations

No abstract provided.

A Theory Of Travel Decision-Making With Applications For Modeling Active Travel Demand, Patrick Allen Singleton

Dissertations and Theses

The continuing evolution of urban travel patterns and changing policy goals and priorities requires that transportation researchers and practitioners improve their abilities to plan and forecast the demand for travel. Walking and bicycling - the primary forms of active travel - are generating increasing interest for their potential to reduce automobile use, save governmental and consumer costs, and improve personal and social health outcomes. Yet, current transportation planning tools, namely regional travel demand forecasting models, poorly represent these active travel modes, if at all.

More broadly, travel models do an incomplete job of representing the decision-making processes involved in travel …

A Simple Method For Estimation Of Queue Length, S. P. Anusha, Lelitha Devi Vanajakshi, Anuj Sharma

Department of Civil and Environmental Engineering: Faculty Publications

Urban arterials are characterized by frequent intersections. Queue length and delay are the two primary measures of performance of intersection. These measures play a primary role in determining the arterial performance. This article presents a methodology to determine the number of vehicles in queue at a signalized intersection for under saturated traffic conditions. The results obtained were validated using actual values that are manually extracted. The root-mean-square error is of the range 1.3 vehicles for estimation of number of vehicles in queue. The various aspects that have to be considered in accurate estimation of performance measures are also discussed.

Estimation Of Travel Time Based On Vehicle-Tracking Models, Anuj Nayyar

UNLV Theses, Dissertations, Professional Papers, and Capstones

In this thesis we study the travel time problem based on the known traffic density model. Using the conservation law, we model the travel time function by a boundary value problem of a non homogeneous linear hyperbolic equation. The equation is transformed into an initial value hyperbolic equation, and the well-posedness of the problem is discussed. The mathematical analysis for both density and travel problems are given. We also derive the analytic solutions for several special cases of traffic density. Numerical schemes are proposed for solving for travel time problem. Several numerical examples are presented and error analysis on the …

Performance Measure For Transportation Network: A Study In Travel Time Dynamics, Anuj Nayyar

UNLV Theses, Dissertations, Professional Papers, and Capstones

Arterial Performance Measurement and Monitoring is one of the leading goals of any transportation agency. The complexity of the differences between performance measures is highlighted and the various data collection methodologies are highlighted. A major performance measure that impacts end users and traffic planners is travel time. This study presents defining a mathematical system for modeling travel time. The modeling in real-time is presented and methods are proposed to evaluate it using vehicle trajectories. Also comparative results are presented between the actual sensor data sets and simulated data to study the effectiveness of the system developed.

Study Of Seat-Belt Usage In Nevada & Driver's Performance, Atul Sancheti

UNLV Theses, Dissertations, Professional Papers, and Capstones

According to the Centers for Disease Control (CDC), motor vehicle incidents has been reported to be the leading cause of the accidental deaths in the United States accounting for more than 42,000 deaths every year. Distracted driving and Driving under influence (DUI) are the major contributors to these roadway crashes. Moreover, drivers fatigue and drowsiness behind the wheel is another important factor contributing to the high fatality rate. These factors results in significant decline in the driver's abilities of perception, recognition and vehicle control.

It has also been reported by National Highway Traffic Safety Administration (NHTSA) estimated that about 292,471 …

Performance Comparison Of Design-Build And Construction Manager/General Contractor Highway Projects, Binita Shakya

UNLV Theses, Dissertations, Professional Papers, and Capstones

Researchers have conducted numerous studies comparing project performance of design-bid-build (DBB) and design-build (DB) highway projects. However, little research has been done to compare the performance of DB and construction manager/general contractor (CM/GC) highway projects. Therefore, an exploratory study was conducted to compare the performance of 55 DB and 34 CM/GC highway projects from various States Departments of Transportation (DOTs) in terms of cost, change orders, and construction intensity. The results showed that contract award cost growth was significantly lower in DB projects than in CM/GC projects. In contrast to this, the total cost growth of DB projects was higher …

Cracking Susceptibility Of Concrete Made With Recycled Concrete Aggregate, O. Burkan Isgor, Jason Ideker, Tengfei Fu, Matthew P. Adams

TREC Final Reports

As high-quality, local, natural aggregate resources continue to become less available, and the cost of landfilling waste material rises, the need for alternative aggregates and recycling of waste material will increase. Using RCA in fresh concrete is one way to address both of these issues. However, there has long been a concern that RCA may negatively affect the properties of new concrete in which it is included. The results of the present investigation, however, indicate that the use of RCA in new concrete may not produce higher levels of free drying shrinkage as previously believed. Actually, these results show that …

Piloting Portland's Multimodal Arterial Performance System, Shaun Quayle

PSU Transportation Seminars

Shaun will present on the recently completed pilot demonstration of multimodal arterial performance measures for the Portland metro region, as part of the larger regional concept of operations. Treatments include a permanent bike count station on the Springwater Trail, permanent truck classification stations, Bluetooth travel time stations, as well as leveraging existing transit and signal controller data to paint a picture of the collective modal transportation system.

Cyclist Compliance At Signalized Intersections, Sam R. Thompson

PSU Transportation Seminars

Although the running of red lights is perceived by motorists as a commonplace behavior for cyclists, little research has been done on the actual rates of cyclist compliance at signalized intersections. Furthermore, little is known about the factors that influence cyclist non-compliance. This research seeks to illuminate the rates of and reasons for infringement against red lights using video footage and survey data from cyclists in Oregon.

University Scholar Series: Frances Edwards And Daniel Goodrich, Frances L. Edwards, Daniel Goodrich

University Scholar Series

Transportation Security After 9/11

On November 13, 2013, Dr. Frances Edwards and Daniel Goodrich gave a talk titled “Transportation Security After 9/11” as part of the University Scholar Series hosted by Provost Ellen Junn at the Dr. Martin Luther King, Jr. Library. Dr. Frances L. Edwards is Deputy Director of the National Transportation Security Center at Mineta Transportation Institute, professor of political science, and director of the MPA program at SJSU. Dan Goodrich is a Research Associate with Mineta Transportation Institute at SJSU, and a lecturer in the MSTM and MPA programs. Together, they have authored the textbook Introduction to …

Why Doesn't That Traffic Signal Ever Turn Green? An Evaluation Of Roadway Markings For Cyclists, Stefan W. Bussey, Christopher Monsere, Peter Koonce

PSU Transportation Seminars

Signalized intersections often rely on vehicle detection to determine when to give a green light. The 2009 Manual of Uniform Traffic Control Devices (MUTCD) includes an on-pavement marking and curbside sign that public agencies can use to indicate where cyclists should position themselves while waiting at an intersection. This presentation reviews the effectiveness of current markings, signs, and other methods used to help cyclists properly position themselves over detection.

Fluttering Beauty, Jonathan Jeffrey

SCL Faculty and Staff Publications

This article chronicles the efforts of Lillian Iona (Tyne) Pace (1925-2010) in getting the Viceroy butterfly designated as the Kentucky state butterfly.

Tls Newsletter Volume 7, Edition 10. November, 2013, Unf Transportation And Logistics Society

Transportation & Logistics Society Newsletter

Inside the Newsletter: TLS Meeting, Wednesday November 13. TLS President's Corner. Upcoming Events. Expanding Your Network with Professional Organizations. Get to Know TLS Secretary Lindsey Zuccala. TLS on Tour: Seaonus--Cargo in Motion. Life After Graduation with Rachel Cecil.

From Transit Stop To Urbanity Node: Field Audit For Measuring Livability At The Transit Stop, Deni Ruggeri

TREC Final Reports

This research proposal addresses issues of livability at the transit stop. American transit systems have historically been “shoehorned” into existing street networks designed predominantly for cars and trucks. While much research exists on livability and walkability in the context of urban and suburban streets and blocks, bus stops are greatly understudied. This research focused on bus stops and aimed at analyzing their performance in terms of livability, with particular emphasis on perceptions. Our definition of livability was expanded to include considerations of safety and maintenance, cleanliness, imageability and vitality, which have been shown to affect people’s perceptions of livability and …

Clouds, Crowds, And Traffic: What 10 Emerging Megatrends Mean For The Future Of Transportation, Ted Trepanier

PSU Transportation Seminars

Ten new megatrends will be presented with a discussion on the resulting shifts on the transportation industry. Details will include a look on broken trends and the new challenges introduced for transportation planning. Thoughts will also be presented introducing a pivot to the current model being pursued by the Connected Vehicle program. Finally, planners will be challenged to consider a new question for the future of our connected communities, you have to come to hear it.

Educational Campaign For Improving Pedestrian Safety: A University Campus Study, Yu Zhang, Makarand Gawade, Pei-Sung Lin, Trenda Mcpherson

CUTR Faculty Journal Publications

Florida is the state with the highest pedestrian fatality rate per unit population in the U.S. In addition to engineering countermeasures, educational efforts directed to pedestrians and other road users are equally important for improving pedestrian safety. To explore educational formats and identify effective educational methods, the Florida Department of Transportation (FDOT) sponsored a pilot program called “Bulls Walk and Bike Week Campaign” on the Tampa campus of the University of South Florida (USF). A before-and-after comparison study was designed to evaluate the effectiveness of this campaign. In the study, observational surveys and a questionnaire survey were conducted to compare …

Podcar City Washington, Mti Report S-13-03, Mineta Transportation Institute

Mineta Transportation Institute

On October 23-25, 2013, the Mineta Transportation Institute (MTI) co-presented a two-and-one-half day conference offering insights, strategies, and opportunities for cities to develop personal rapid transit (PRT) systems in their jurisdictions. These PRT systems are also known as automated guideway transit (AGT) or “podcars.” They are small driverless cars (4-6 passengers) that operate on an automated guideway system. Typically, they are used to transport passengers for first- and last- mile trips, such as between a transit station and an airport. However, they may be used for longer distances within or between neighborhoods or commerce centers. The International Institute of Sustainable …

Challenges And Opportunities In Taxi Fleet Anomaly Detection, Rijurekha Sen, Rajesh Krishna Balan

Research Collection School Of Computing and Information Systems

To enhance fleet operation and management, logistics companies instrument their vehicles with GPS receivers and network connectivity to servers. Mobility traces from such large fleets provide significant information on commuter travel patterns, traffic congestion and road anomalies, and hence several researchers have mined such datasets to gain useful urban insights. These logistics companies, however, incur significant cost in deploying and maintaining their vast network of instrumented vehicles. Thus research problems, that are not only of interest to urban planners, but to the logistics companies themselves are important to attract and engage these companies for collaborative data analysis. In this paper, …

E-Bikes In The United States, John Macarthur

PSU Transportation Seminars

Electric bicycles (e-bikes) are well established in China and other Asian and European countries but have yet to realize their potential in the United States, although recently the number of e-bikes has been growing. Research on the economic, operational, and safety issues of e-bikes in the U.S. is limited. This research aims in part to understand if different bicycling technology, in this case electric assist bicycles or e-bikes, can reduce barriers to bicycling and encourage more bike trips and longer bike trips, and increase the diversity of people bicycling, including people with a disability or chronic injury to bicycle. Some …

Transportation Analysis Informing Transportation Planning And Policy At Odot, Alexander Bettinardi

PSU Transportation Seminars

The Transportation Planning Analysis Unit (TPAU) at ODOT helps to provide information to a large variety of transportation plans, projects, and policy questions. This allows customers to make better informed decisions and to maximize limited resources. In order to fill this role TPAU and the Oregon modeling community have a fairly large "toolbox" of models and analysis tools and procedures. This transportation seminar will give an overview of the role and services that TPAU provides and the different tools and processes used to fulfill that role.

Using Empirical (Real-World) Transportation Data To Extend Travel Demand Model Capabilities, Michael Mauch

PSU Transportation Seminars

Real-world traffic trends observed in PORTAL and INRIX traffic data are used to expand the performance measures that can be obtained from Portland Metro's travel demand model to include the number of hours of congestion that can be expected during a typical weekday and travel time reliability measures for congested freeway corridors.

Tls Newsletter Volume 7, Edition 9. October, 2013, Unf Transportation And Logistics Society

Transportation & Logistics Society Newsletter

Inside the Newsletter: TLS Meeting October 16. TLS President's Corner. Upcoming Events. Hard and Soft Skills for a Successful Career. UNF T & L Students Attend National Events. Get to know TLS Vice President Benjamin Freedman. TLS on Tour--COACH Distribution Center. Life After Graduation with Chris Elliott

Data-Driven Illustrations For Climate Smart Communities Scenarios, Nancy Yen-Wen Cheng, Kim Ellis, Molly Vogt, Clint Chiavarini, Justin Houk, Brian Lockyear, Boyce Postma, Peggy Morell

TREC Final Reports

Public investment in transit and streetscape improvements can encourage private development, and subsequently increase transit ridership and reduce pollution. Portland, OR’s Metro regional government has developed investment scenarios designed to reduce light vehicle carbon emissions. Adopting a regional scenario requires public review and consultation with local governments who will implement the comprehensive plans and land-use regulations. Decision makers and residents need to understand potential benefits: ways in which targeted investment could generate more livable urban spaces while reducing greenhouse gases. Illustrations can show how the investments could shape the pedestrian experience through trees, street furniture, buildings, open spaces, etc.

This …

Commute-Friendly, Gas-Electric Hybrid Vehicle Testing, James Long, Hugh Currin, Xin Wang

TREC Final Reports

Overview: Green Lite Motors is a Portland-based company building a hybrid commuter vehicle targeted for urban and suburban areas. The vehicle is a front/back, two-seat configuration with three wheels (two front and one rear-drive wheel). The vehicle is classed as a motorcycle, giving it all the advantages of a smaller footprint in parking and highway travel; however, the advanced roll-cage design and fairing give the vehicle safety and comfort advantages of a standard passenger car. The unique combination of internal combustion engine and electric motor give the vehicle mileage possibilities greater than 100 mpg as well as the convenience and …

Influence Of Road Cross Section On Access Spacing, Karen K. Dixon, Yanfen Zhou, J. L. Gattis

TREC Final Reports

This report presents a study on the influences of select cross-sectional-related design elements (specifically median configurations and bicycle lanes) and their impact on crash severity and type, as well as the associated driver gap acceptance for turning maneuvers at midblock driveway locations on urban arterials. The primary goal of this proposed research is to better understand how the median and bicycle lane configurations can influence safety and operations at driveway locations. The research team utilized crash data, traffic data, and roadway information from driveway locations in the U.S. states of Oregon, Arkansas and Oklahoma. The project team supplemented the data …

The Crisis In State Highway Finances: Its Roots, Current Effects, And Some Possible Remedies, Juita-Elena Yusuf, Lenahan O'Connell

School of Public Service Faculty Publications

This paper focuses on the American states and the sources of the expanding structural imbalance between their highway-related revenues on the one hand and expenditures for transportation infrastructure needs on the other. The paper describes the roots of the funding problem over recent decades, looks at some of the responses taken at the state and federal level, and discusses their inherent limitations as solutions to this funding crisis. The paper also presents several policy recommendations for increasing revenues. We demonstrate that a variable rate gas tax indexed to the construction cost index and improvements in automobile fuel efficiency and a …

Developing A Framework For Determining The Contribution Of Transportation Project To Sustainable Development, Karim Ahmed Abdel Warith

Open Access Dissertations

In the past few years, stakeholders in the transportation industry have been concerned with sustainability. However, transportation decision makers have had difficulty incorporating sustainability into transportation infrastructure decisions. This is mainly attributed to the vagueness of the term. Incorporating sustainability into transportation decision making has been a desire put forth by engineers for that past 10 years. However, with no apparent method of defining sustainability, designers and decision makers have not been able to fulfill this desire.

This investigation attempts to define sustainability in a comprehensive and quantitative manner. The research proposes a new methodology that relies on the objective …

Merged Aggregate Nearest Neighbor Query Processing In Road Networks, Weiwei Sun, Chong Chen, Baihua Zheng, Chunan Chen, Liang Zhu

Research Collection School Of Computing and Information Systems

Aggregate nearest neighbor query, which returns a common interesting point that minimizes the aggregate distance for a given query point set, is one of the most important operations in spatial databases and their application domains. This paper addresses the problem of finding the aggregate nearest neighbor for a merged set that consists of the given query point set and multiple points needed to be selected from a candidate set, which we name as merged aggregate nearest neighbor(MANN) query. This paper proposes an effective algorithm to process MANN query in road networks based on our pruning strategies. Extensive experiments are conducted …

2012 Portland Metropolitan Region Transportation System Performance Report, Robert L. Bertini, Dean George, Matthew Downey

Civil and Environmental Engineering Faculty Publications and Presentations

Our transportation system is a key ingredient in the economy, quality of life and urban fabric of the Portland metropolitan area. It has been stated in the past that it is not possible to manage our transportation system tomorrow unless we understand how it is performing today. In this spirit, Portland State University has been working with regional and statewide partners to develop new capabilities to measure, monitor and track the performance of the transportation system in real time and using archived data sources. We believe that it is possible to leverage these disparate data sources toward providing better transportation …