UNT Libraries Government Documents Department - 39 Matching Results

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Methods for Improving Consistency Between Statewide and Regional Planning Models
"This research provides insight into the current practices of statewide modelling across the USA and presents methods to not only to quantify the inconsistencies, but reduce them" (p. i).
Binder Rheology and Performance in Warm Mix Asphalt : Interim Report
This report presents the preliminary findings from a study conducted to investigate the influence of chemical warm mix asphalt (WMA) additives and reduced aging on the viscosity, stiffness, susceptibility to permanent deformation, fracture resistance, and thermal cracking resistance of asphalt binders.
Developing a Testing Device for Total Pavements Acceptance : Third Year Report
This report provides information on the third year of the Project 0-6005 test progress towards building the Total Pavement Acceptance Device (TPAD).
Guidance on extracting value from Texas Department of Transportation's land holdings
"In this report the Center of Transportation Research at The University of Texas at Austin undertook a comprehensive research study to identify and determine when, where, and under what circumstances Texas Department of Transportation (TxDOT) should pursue the implementation of Value Extraction Applications (VEA), and how to effectively recognize and involve key stakeholders."
Materials selection for concrete overlays : the final report
Report on the existing concrete overlays in Texas and the results of laboratory research on the material selection and construction of concrete overlays.
RTI Special Studies for TxDOT Administration in FY 2011
Abstract: This research project was established by TxDOT's Research and Technology Implementation Office to address special studies required by the department's Administration during FY 2011. Three short-term, quick-turnaround tasks were completed and are documented.
Strut-and-Tie Model Design Examples for Bridges
A series of five detailed design examples feature the application of state-of-the-art strut-and-tie modeling (STM) design recommendations. Design components include: Five-Column Bent Cap of a Skewed Bridge, Cantilever Bent Cap, Inverted-T Straddle Bent Cap (Moment Frame), Inverted-T Straddle Bent Cap (Simply Supported), and Drilled-Shaft Footing.
Megaregion Freight Planning: A Synopsis
"Megaregion interest has grown strongly in the last decade and is now seen be a growing number of planners as offering effective contributions to problems such as modal congestion, development disparity, and air pollution that individual metropolitan areas or cities cannot resolve individually. Megaregion planning presents an alternative way of mitigating metropolitan problems of large-scale transportation systems, green infrastructure, and economic development and has attracted a number of transportation advocates since 2000."
Application guide and specifications for geotextiles in roadway applications
Abstract: "Geotextiles, one among the different geosynthetic products, can be used for a number of functions or applications in pavement design. The benefits of using geotextiles in pavements and other transportation applications have triggered a proliferation of products. While this abundance of new products has led to reduction in costs, it has also made it difficult for TxDOT personnel to choose appropriate products based on their engineering properties. Consequently, this report provides the basis for (i) guidelines for proper use and selection of geotextiles in pavements, (ii) material specifications for geotextiles in pavement applications, and (iii) draft construction specifications."
Experimental Results on Soil-Geosynthetic Interaction Stiffness
This report summarizes small pullout test results conducted as par of Texas Department of Transportation (TxDOT) Project 5-4829 to assess the performance of a newly developed small pullout box as well as the associated K SGI model.
Geosynthetic-Reinforced Unbound Base Courses: Quantification of the Reinforcement Benefits
Report on the testing involving a modified pullout device for the characterization of the confined stiffness in geosynthetic reinforcements.
Monitoring of Experimental Sections Using a Web-Based Database
Report describing the development of a wiki-type online database system to document TxDOT research and construction programs.
Shear strengthening of reinforced and prestressed concrete beams using Carbon Fiber Reinforced Polymer (CFRP) sheets and anchors
This report presents experimental results, installation procedures for CFRP sheets and anchors, specifications for fabrication and installation of CFRP anchors, and anchored CFRP shear design guidelines.
Texas Energy Sector: Past and Future
"The objectives of this research study were to (a) illustrate and quantify the impacts imposed by the energy sector on Texas's transportation system and (b) identify key energy demand indicators by energy source that TxDOT can track in an effort to anticipate the associated future transportation impacts on Texas's transportation system."
Estimating Texas motor vehicle operating costs : final report
"This report and its appendices summarize the findings of a 2-year extension to the TxDOT-sponsored study 0-5974 entitled "Estimating Texas Motor Vehicle Costs" undertaken by a Center for Transportation Research (CTR) team of mechanical engineers and economists at The University of Texas at Austin."
Equipment Replacement Optimization
"The objective of the Texas Department of Transportation (TxDOT) Research Project 7-4941 is to; determine the best optimization methodology; evaluate commercial fleet management systems; develop the model if this cost-effective relative to purchasing a commercial model; and validate the new model as needed using data available on TxDOT's current fleet."
Impacts of energy developments on the Texas Transportation System infrastructure
"Texas energy sector has a critical impact-historically and currently-on both the state economy and the Texas transportation system. The stat's various transportation modes, including rail, highways, pipelines, and ports, form a system that supports the energy sector in a number of ways."
Implementing a project and portfolio management system for TxDOT project development
"Beginning in the summer of 1999, Texas Department of Transportation (TxDOT) started developing the framework for implementing a sophisticated new system to manage its large and diverse portfolio of projects during their development phase. This was followed by the implementation itself for managing project schedules, project and portfolio resources and costs during their development cycle. This unique and challenging implementation across TxDOT encompassed all functional areas involved in the project development phase. It was successfully completed by overcoming technical, technological, and cultural challenges inherent with any implementation of this scale and magnitude."
Texas Roundabout Guidelines: Final Report
"This report contains best practices for choosing appropriate locations and design concepts for Texas roundabouts. This research effort is comprised of the following components: synthesis of available literature and analysis methods, development of capacity analysis methods, validation and enhancement of existing tools, and a spreadsheet tool to aid in roundabout planning and implementation."
Traffic Operations and Safety Benefits of Active Traffic Strategies on TxDOT Freeways
Report discussing a project, which developed a series of interdependent models and a simulation framework to evaluate the traffic operations and safety benefits of ATM strategies. Four ATM scenarios were evaluated in this study: variable speed limits (VSL), peak-period shoulder use, VSL and shoulder use, and ramp metering.
Literature review of current practices in dealing with fluctuations of maintenance budgets
Report discussing a literature review of current budget cutting strategies used in routine roadway maintenance planning, including methods and techniques that are employed by other state and international transportation organizations (DOT's). It also reviewed methodologies developed from previous research and identified the most effect risk management techniques.
Comparative study of mechanical and corrosion resistance properties of bridge post-tensioning strands
This report summarized the exploration of new methods of protection for the strands used in post-tensioning of concrete bridges.
Implementation of Database for TxDOT ARRA Projects
Report discussing projects initiated under the American Recovery and Reinvestment Act of 2009 (ARRA), a fiscal stimulus package signed by President Obama on March 6, 2009. State agencies like the Texas Department of Transportation (TxDOT) who received ARRA funds had to report, on a monthly basis, various data on each project in the ARRA program, including staff numbers, hours worked, and payroll. TxDOT asked the Center for Transportation Research (CTR) to identify and isolate specific elements of the 0-6592 database that TxDOT's Construction Division (CST) can implement into an existing TxDot database. This report describes the implementation of the database and procedures for updating it.
Measuring access to transit service in rural transit systems : feedback from the workshops and recommendations for improving the Demand Response Transit accessibility tool
Report on the application of a paratransit microsimulation patron accessibility analysis tool in four rural transit agencies in workshops. The workshops provided an overview of the Demand Response Transit [DRT] accessibility tool developed by the research team, obtained feedback on the results predicted by the DRT tool, and identified ways to improve the DRT tool.
Proposed Texas Department of Transporation Strategic Research Program: Second Year Report
In February 2010, The Texas Department of Transportation (TcDOT) contracted with the Center for Transportation Research (CTR) at The University of Texas at Austin, the Texas Transportation Institute (TTI), and The Center for Multidisciplinary Research in Transportation (TechMRT) at Texas Tech University, to assist TxDot in developing a Strategic Research Program (SRP). This report documents the work conducted from September 2010 to August 2011.
Validation and implementation of the structural condition index (SCI) for network-level pavement evaluation
"The objective of this research is to validate the pavement Structural Condition Index (SCI) developed under a previous Research Project, 0-4322, and to develop guidelines for implementing the SCI at the network level."
Materials selection for concrete overlays : information survey review and evaluation of existing concrete overlays in Texas
"A comprehensive search and review of the use of concrete overlays by the TxDOT districts as well as other DOTs was conducted, with special emphasis focused on gathering information about the constituent materials and mixture proportioning used in the concrete overlays. This review also included new materials such as fibers used in previous studies and new types of fibers currently available. Publications and articles covering the various overlay rehabilitations were used as the background this project, as well as the several studies and implementation projects have been conducted for TxDOT."
Project Report on the Continued Development and Analysis of the Flexible Pavements Database
Report on the development of the Texas Flexible Pavement database and the first 7 months of a stage two project, after which the project was terminated.
A web-based pavement performance and maintenance management and Geographic Information Systems mapping system for easy access to pavement condition information
"This report presents a new approach to the development of such a decision support system with its focus on maintenance management for TxDOT."
Fatigue Life of Steel Base Plate to Pole Connections for Traffic Structures
"This is a final report of an extensive experimental and analytical examination of the fatigue behavior of the welded end connection used on high-mast light structures and traffic signal masts. The weld details commonly used for these connections produce very poor fatigue performance. Their performance is a function of base plate stiffness, weld type and geometry, and number of anchor bolts. Recommended connections and their corresponding fatigue strength are given as well as recommended fabrication and welding specifications."
Laboratory and field evaluations of external sulfate attack in concrete
"The research described in this report aims to address several of these lingering issues, especially those that are particularly relevant to the state of Texas."
Peer state assessment of TxDOT maintenance program and practices: workshop and road rally findings
"The goal of the project was to conduct a workshop at CTR and in the Austin District that would educate the visiting peers on TxDOT"s maintenance practices and invite their feedback."
Assessing the environmental justice impacts of toll road projects
"The objective of this study was to extend the work that was conducted under TxDOT Research Project 0-5208 by (a) reviewing the ability of available tools and analysis techniques to quantify and qualitatively describe the (environmental justice) EJ impacts associated with toll road projects and toll road systems through an evaluation of state-of-the-practice applications, and (b) recommending a suitable approach to assess the EJ impacts of toll roads and toll road systems on EJ communities."
Proposed TxDOT strategic research program
"This report documents the results of the work conducted by the Center for Transportation Research (CTR) at the University of Texas at Austin, the Texas Transportation Institute (TTI), and The Center for Multidisciplinary Research in Transportation (TechMRT) at Texas Tech University, to assist TxDOT in developing the elements of the SRP."
Progress during the first year towards building the Total Pavement Acceptance Device (TPAD)
This report discusses the significant progress that was made towards developing the Total Pavement Acceptance Device (TPAD) during the first year of Project 0-6005.
Design and application of accessible land-use modeling tools for Texas regions
"This report consists of two parts. The first summarizes key details of the Suitability Analysis (SA) model, while the second illustrates the implementation details of the Gravity Land-Use Model (G-LUM). Both modeling approaches have been applied to the Austin region of Texas, but for different case study examples."
Laboratory evaluation of influence of operational tolerance (acceptance criterion) on performance of Hot-Mix Asphalt Concrete
Report on a study examining the effects of variability in mix design of hot-mix asphalt concrete. The study tested the laboratory performance of the asphalt mixes and performed statistical analyses to determine the effects of each variable.
Guidance for erection and construction of curved I-girder bridges
"This report summarizes the methods, results, and recommendations from a research investigation on the behavior of horizontally curved girders during construction. This information provides guidance on critical issues that bridge engineers face when designing curved steel plate I-girders."
Training Manual for Pavement Concrete Proportioning Method
"This manual presents a method to proportion concrete paving mixtures made with manufactured sands and increased micro-fines percentages in a step-by-step manner. This method was adapted from Koehler's (2007) proportioning method for self-consolidating concrete" (p. 1).
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