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Predicting the incremental effects on transit ridership due to Bus-On-Shoulder operations

Description: "Bus-On-Shoulder (BOS) operations are an extremely effective method for increasing the quality of a bus service; allowing for a bus to use a freeway shoulder as a bypass lane not only decreases bus travel time but also increases the bus service's overall performance. BOS has also been found to increase bus ridership. The modern BOS system began in the Minneapolis-Saint Paul area almost 20 years ago. Using the extensive data available from Minneapolis-Saint Paul, ridership changes due to BOS operations were explored. The data showed that with 90% confidence, ridership will increase by at least 4.5% and as much as 14.3%. This paper also explores how the citizens of Austin, Texas would respond to a BOS operation on local freeways. A stated preference survey was administered to a sample of Austin commuters. It was determined that potential riders would desire a time savings of 7 or more minutes. Typically it is challenging for persons to accurately predict time savings, therefore it was concluded that for a BOS operation to be successful it was necessary for a there to be a perceived time savings."
Date: August 2010
Creator: Machemehl, Randy B. & Pappas, Elani
Partner: UNT Libraries Government Documents Department

Use of Micro Unmanned Aerial Vehicles for roadside condition assessment

Description: "Micro Unmanned Aerial Vehicles (MUAVs) that are equipped with digital imaging systems and global positioning systems provide a potential opportunity for improving the effectiveness and safety of roadside condition and inventory surveys. This study provides an assessment of the effectiveness of MUAVs as a tool for collecting condition data for roadside infrastructure assets using three field experiments."
Date: December 2010
Creator: Gharaibeh, Nasir G. & Hart, William Scott
Partner: UNT Libraries Government Documents Department

How fast is a fast train? : comparing attitudes and preferences for improved passenger rail service among urban areas in the South Central high-speed rail corridor

Description: "Using data from an Internet-based survey of residents in three communities in Central Texas-Waco, Temple, and Hillsboro-this research project examined the potential impacts of new intercity passenger rail service on small-or medium-sized communities located in the intermediate area between two larger urban areas that form the endpoints of a federally designated intercity high-speed rail corridor."
Date: December 2011
Creator: Morgan, Curtis Alan & Sperry, Benjamin R.
Partner: UNT Libraries Government Documents Department

Developing infrastructure for interconnecting transportation network and electric grid

Description: "This report is primarily focused on the development of mathematical models that can be used to support decisions regarding a charging station location and installation problem. The major parts of developing the models included identification of the problem, development of mathematical models in the form of bi-level and stochastic programming problems, and development of a solution approach using a meta-heuristic method."
Date: September 2011
Creator: Damnjanovic, Ivan & Kim, Seok
Partner: UNT Libraries Government Documents Department

Managing commodity risks in highway contracts: quantifying premiums, accounting for correlations among risk factors, and designing optimal price-adjustment contracts

Description: "The main goal of this report is to investigate the impact of commodity price risk on construction cost and the optimal risk hedging of such risks using price adjustment clauses. More specifically, the objective of the report is to develop models that can help highway agencies manage commodity price risks. In this report, weighted least square regression model is used to estimate the risk premium; both univariate and vector time series models are estimated and applied to simulate changes in commodity prices over time, including the effect of correlation; while genetic algorithm is used as a solution approach to a multi-objective optimization formulation. The data set used in this report consists of TxDot bidding data, market-based data including New York Mercantile Exchange (NYMEX) future options data, and Engineering New-Record (ENR) material cost index data. The results of this report suggest that the optimal risk mitigation actions are conditional on owners' risk preferences, correlation among the prices of commodities, and volatility of the market."
Date: September 2011
Creator: Damnjanovic, Ivan & Zhou, Xue
Partner: UNT Libraries Government Documents Department

Automated generation of virtual scenarios in driving simulator from highway design data

Description: "The current project explored ways to create custom roadway segments for use in the TTI driving simulator. The project initially attempted to use AutoCAD Civil 3D roadway drawings and export them for use in the simulator."
Date: September 2010
Creator: Zhao, Xi; Nelson, Alicia A.; Chrysler, Susan & Zhang, Yunlong
Partner: UNT Libraries Government Documents Department

Partnering with AVID to create transportation scholars

Description: "The goal of this project was to team with the Advancement Via Individual Determination (AVID) program in local schools to stimulate student awareness of transportation and engineering careers and to encourage interest in the science, technology, engineering, and mathematics (STEM) fields."
Date: October 2010
Creator: Jasek, Debbie & Finley, Melisa D.
Partner: UNT Libraries Government Documents Department

Equity evaluation of vehicle miles traveled fees in Texas

Description: "This report used 2009 National Household Travel Survey (NHTS) Texas data to consider the equity impacts surrounding four vehicle miles traveled (VMT) scenarios. Results indicate that all of the VMT fee scenarios are essentially as equally vertically equitable as the current state gas tax system."
Date: March 2012
Creator: Burris, Mark; Larsen, Lisa. & Whitty, James M.
Partner: UNT Libraries Government Documents Department

Characterizing information propagation through inter-vehicle communication on a simple network of two parallel roads

Description: "In this report, we study information propagation via inter-vehicle communication along two parallel roads. By identifying an inherent Bernoulli process, we are able to derive the mean and variance of propagation distance."
Date: October 2010
Creator: Yin, Kai & Wang, Bruce X.
Partner: UNT Libraries Government Documents Department

Predicting damage in concrete due to expansive aggregates : modeling to enable sustainable material design

Description: "A poroelastic model is developed that can predict stress and strain distributions and, thus, ostensibly damage likelihood in concrete under freezing conditions caused by aggregates with undesirable combinations of geometry and constitutive properties.Sensitivity of the stress distributions to the aggregate and matrix constitutive parameters are assessed to allow improved concrete design."
Date: April 2012
Creator: Grasley, Zachary Charles & Rahman, Syeda
Partner: UNT Libraries Government Documents Department

Laboratory evaluation of friction loss and compactability of asphalt mixtures

Description: "This study aimed to develop prediction models for friction loss and laboratory compaction of asphalt mixtures. In addition, the study evaluated the effect of compaction level and compaction method of skid resistance and the internal structure of asphalt mixtures."
Date: April 2012
Creator: Kassem, Emad Abdel-Rahman; Masad, Eyad; Awed, Ahmed & Little, Dallas
Partner: UNT Libraries Government Documents Department

Development and validation of a testing protocol for carbon sequestration using a controlled environment

Description: "This project conducted initial testing to develop a method for quantifying plant and soil carbon sequestration capabilities under the controlled conditions of the Texas Transportation Institute's Environmental and Emissions Research Facility (EERF)."
Date: March 2012
Creator: Storey, Beverly B.; Foster, Derrold; Johnson, Jeremy & McFalls, Jett
Partner: UNT Libraries Government Documents Department

Potential connected vehicle applications to enhance mobility, safety, and environmental security

Description: "Researchers first conducted a comprehensive review of the state-of-the-art connected-vehicle research and technologies. Once researchers had a thorough understanding of the technology, they focused on selecting and developing the near-term practical applications that use connected vehicle technology. The research team then sought expert opinions from the Texas Transportation Institute working group during two brainstorming sessions, which produced two lists of potential applications and prioritized the applications based on deployment feasibility. In particular, a total of five applications were selected for development of the full concept of operations, including two in safety, two in mobility, and one in environmental security. These applications address various problems, including wrong-way driving and unprotected-grade-crossing crashes (safety): work-zone merge efficiency and safety, and freeway speed harmonization (mobility): and slippery pavement-related crashes (environmental security)."
Date: February 2012
Creator: Balke, Kevin N.; Songchitruksa, Praprut. & Zeng, Xiaosi
Partner: UNT Libraries Government Documents Department

Evaluating the effect of street network connectivity on first/last mile transit performance

Description: "This study defines a novel connectivity indicator (CI) to predict transit performance by identifying the role that street network connectivity plays in influencing the service quality of demand responsive feeder transit services."
Date: November 2011
Creator: Chandra, Shailesh. & Quadrifoglio, Luca
Partner: UNT Libraries Government Documents Department

Enhancement and Outreach for the Active Management Screening Tool

Description: This document reports on the enhancement of and outreach for an active management screening tool. The purpose of the Active Management Screening Tool (AMST) is to help agencies better assess the potential of active management strategies for their region within the congestion management process (CMP). It is structured to provide beneficial information and guidance related to active management strategies in all areas and levels of transportation planning." (Abstract).
Date: July 2012
Creator: Kuhn, Beverly T.
Partner: UNT Libraries Government Documents Department

Using Smartphones to Collect Bicycle Travel Data in Texas

Description: This report provides information on the belief that smartphones could prove to be an effective tool for collecting bicycle travel data and that the information could be used for aiding decision making as to what types of facilities users prefer and guiding decisions about future facilities.
Date: August 2012
Creator: Hudson, Joan G.; Duthie, Jennifer; Rathod, Yatinkumar; Larsen, Katie & Meyer, Joel
Partner: UNT Libraries Government Documents Department

The Transportation Economy : Just in Time

Description: This document discusses a "project to produce a short educational video, targeted at middle school and high school students, illustrating the critical role transportation plays in our modern economy. This report documents the production of 6.5-minute video that provides students with a glimpse of how transportation has become an integral part of the modern economy." (p. 7).
Date: July 2012
Creator: Cole, Richard G.
Partner: UNT Libraries Government Documents Department