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Examining the Market Potential for Natural-Gas Powered Trucks: Barriers and Opportunities for Promoting Environmental Sustainability and Economic Prosperity

Description: Report on the potential of natural-gas-powered trucks for increasing environmental sustainability and potential barriers to implementation of natural-gas fueled trucks.
Date: August 2014
Creator: Hazlett, Ryan & Cresswell, Lauren
Partner: UNT Libraries Government Documents Department

The Effect of the City of Houston Transit Corridor Ordinance on Development along METRO's Light Rail Corridors

Description: Report on developers response to the City of Houston's ordinance to encourage development of pedestrian friendly resources in areas along the METRO light rail line.
Date: October 2014
Creator: Hassell, Walter; Lewis, Carol Abel, Ph.D.; Auzenne, Jennifer & Texas Southern University. Center for Transportation Training and Research
Partner: UNT Libraries Government Documents Department

Impact of the Gulf Intracoastal Waterway (GIWW) on Freight Flows in the Texas-Louisiana Megaregion

Description: This report examines the benefits of maintaining the Gulf Intracoastal Waterway (GIWW). The GIWW is comprised of five states. The report contains a historical background, current conditions, barge safety, increase of funding, and summaries of findings and recommendations.
Date: June 2015
Creator: Harrison, Robert
Partner: UNT Libraries Government Documents Department

The Impact of the Conversion of Incandescent Bulbs to LED Light Source in Traffic Signals in Houston: A Step Toward Sustainable Control Devices

Description: Report on the impact of conversion of traffic lights from incandescent bulbs to LEDs and its impact on sustainability and costs using Houston as a case study.
Date: June 2015
Creator: Godazi, Khosro; Miller, Alexandra & Goodwin, Ronald E., Ph.D.
Partner: UNT Libraries Government Documents Department

Forecasting the Impacts of Shale Gas Developments on Public Health and Transportation Systems on Both Sides of the Mexico-U.S. Border

Description: Report on an improvement of the Bayesian system for forecasting the impact of shale gas development on public health and transportation systems on both sides of the Mexico-U.S. border near the Eagle Ford formation.
Date: August 2015
Creator: Medina-Cetina, Zenon & Varela, Patricia
Partner: UNT Libraries Government Documents Department

Optimal infrastructure maintenance scheduling problem under budget uncertainty

Description: "This research addresses a general class of infrastructure asset management problems. Infrastructure agencies usually face budget uncertainties that will eventually lead to suboptimal planning if maintenance decisions are made without taking the uncertainty into consideration. It is important for decision makers to adopt maintenance scheduling policies that take future budget uncertainty into consideration. The author proposes a multistage, stochastic linear programming model to address this problem. The author also develops solution procedures using the augmented Lagrangian decomposition algorithm and scenario reduction method. A case study exploring the computational characteristics of the proposed methods is conducted and the benefit of using the stochastic programming approach is discussed."
Date: May 2011
Creator: Zhang, Zhanmin & Gao, Lu
Partner: UNT Libraries Government Documents Department

Development of reliable pavement models

Description: "The current report proposes a framework for estimating the reliability of a given pavement structure as analyzed by the Mechanistic-Empirical Pavement Design Guide (MEPDG). The methodology proposes using a previously fit response surface, in place of the time-demanding implicit limit state functions used within the MEPDG, in combination with an analytical approach to estimating reliability using First-Order and Second-Order Reliability Methods (FORM and SORM). Additionally, in order to assess the accuracy of the FORM and SORM reliability estimates, Monte Carlo simulations are also performed."
Date: May 2011
Creator: Prozzi, Jorge Alberto & Aguiar-Moya, José Pablo
Partner: UNT Libraries Government Documents Department

Managed lane travelers: do they pay for travel as they claimed they would?

Description: "This study examined if travelers are paying for travel on managed lanes (MLs) as they indicated that they would in a 2008 survey. To achieve the objectives, an Internet-based stated preferences (SP) survey of Houston's Katy Freeway travelers was conducted in 2010. Three survey design methodologies-Db-efficent, random level generation, and adaptive random-were tested in this survey."
Date: May 2011
Creator: Devarasetty, Prem Chand; Shaw, W. Douglass & Burris, Mark
Partner: UNT Libraries Government Documents Department

Texas Urban Triangle: creating a spatial decision support system for mobility policy and investments that shape the sustainable growth of Texas

Description: "This project came into being due to the dramatic transformation of the four core Texas metropolitan areas into an emergent megalopolis: Dallas-Fort Worth, Houston, San Antonio, and Austin. Its aims are two-fold: to provide a framework for decisions about future growth in the fastest growing region of Texas, and to spur further research into the complexities of this vast and rapidly emerging mega-region. The Texas Urban Triangle - 17 million persons spread over 58,000 square miles - is a new urban phenomenon, a triangular megalopolis whose development is not linear and contiguous. This report gives policy makers and investors from all sectors of society the critical knowledge they need to make decisions that will shape the future of Texas. The Texas Urban Triangle is one of the most dynamic urban regions in the nation, and to ensure it continues to flourish, we must build a future based on sustainable growth principles. Our preliminary findings suggest that this is not always the case. Further research needs to be conducted to obtain a complete, detailed, and comprehensive portrait. Nonetheless, even these preliminary findings are robust and point to more sustainable options for the future. Now that this preliminary analysis has been completed, readers are invited to consider the results. The ultimate goals of the project are three-fold: To plant the Texas Urban Triangle squarely and firmly into the public imagination of Texans far and wide - to put the Texas Urban Triangle "on the map." To provide a basis for current policy and planning decisions so that a more vibrant and attractive "Heart of Texas" - its metropolises, counties, and cities - provides a more sustainable environment for its residents, and their descendents [sic] and newcomers, well into the future. To determine what future research, particularly at the regional scale, is needed ...
Date: November 2010
Creator: Bright, Elise M.; Morgan, Curtis Alan & Neuman, Michael
Partner: UNT Libraries Government Documents Department

The economic efficiency of allowing longer combination vehicles in Texas

Description: "This paper shows the economic efficiency of allowing longer combination vehicles in Texas. First, an overview of the truck size and weight policies is explained, with an emphasis on those that affect Texas. Next, LCV operations in other countries are described. Then, an LCV scenario for Texas is chosen, with specific routes and vehicle types. Operational costs for these vehicles are calculated on a cost per mile and cost per ton (or cubic yard) mile. The LCV scenario and the current truck base case are analyzed to find the number of truck trips, the number of mile, and the cost per mile for the chosen routes. These are then compared to estimate the change if LCVs were allowed in Texas."
Date: August 2011
Creator: Walton, C. Michael. & Bienkowski, Bridget N.
Partner: UNT Libraries Government Documents Department

An evaluation of the effects of transit oriented development in a suburban environment

Description: "Transit-Oriented Development (TOD) refers to dense, pedestrian-friendly, livable communities that have good transit as a nucleus. While transit facilities are missing in most suburban towns and the residents are heavily dependent on their vehicles, it is wondered whether residents would take advantage if public facilities were available. This paper presents information about some vital aspects of TOD when viewed in suburban communities."
Date: October 2010
Creator: Lewis, Carol Abel & Lastrape, Krystal M.
Partner: UNT Libraries Government Documents Department

Examining the influence of tolls on commute departure and route choice behavior in the Chicago region

Description: "The current study contributes toward understanding the influence of congestion pricing on commuter behavior by specifically examining what dimensions of commute travel behavior are affected as a response to congestion pricing."
Date: August 2010
Creator: Paleti, Rajesh; Bhat, Chandra R. & Eluru, Naveen
Partner: UNT Libraries Government Documents Department

Examining the Role of Trip Length in Commuter Decisions to Use Public Transportation

Description: Report that examines traveler trip lengths across transit modes, work trip duration frequency distributions and mode share distributions in 7 major cities, 8 Combined Statistical Areas and one Metropolitan Statisical Area and found the effects of increasing population and transit mdoe gvariety on work trip travel time and travel distance.
Date: October 2010
Creator: Yu, Yao & Machemehl, Randy
Partner: UNT Libraries Government Documents Department

Export growth, energy costs, and sustainable supply chains

Description: "The report examines sustainable supply chains in North America and the role played by rail inter-modal operations in lowering ten-mile fuel and emission costs. It examines whether current systems favor imports over exports - a current complaint from some shippers - and whether the development of inland inter-modal ports offers a solution to moving future freight into and out of large metropolitan areas."
Date: November 2010
Creator: Harrison, Rob & Seedah, Dan
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

Designing Fine Aggregate Mixtures to evaluate fatigue crack growth in asphalt mixtures

Description: "Fatigue cracking is a significant form of pavement distress in flexible pavements. The properties of the sand-asphalt mortars or fine aggregate matrix (FAM) can be used to characterize the evolution of fatigue crack growth and self-healing in asphalt mixtures. This study compares the internal microstructure of the mortar within a full asphalt mixture to the internal microstructure of the FAM specimen. This study also conducts a limited evaluation of the influence of mixture properties and methods of compaction on the engineering properties of the FAM specimens. The results from this study, although limited in number, indicate that in most cases the SGC compacted FAM specimen had a microstructure that most closely resembled the microstructure of the mortar within a full asphalt mixture. Another finding from this study was that, at a given level of damage, the healing characteristic of the three different types of FAM mixes was not significantly different. This indicates that the healing rate is mostly dictated by the type of binder and not significantly influenced by the gradation or binder content, as long as the volumetric distribution of the mastic was the same. In other words, the inherent healing characteristics of the asphalt binder play a more significant role relative to other properties (e.g. volumetrics) in the overall fatigue cracking resistance of the asphalt mixture."
Date: April 2001
Creator: Bhasin, Amit; Motamed, Arash & Izadi, Anoosha
Partner: UNT Libraries Government Documents Department