UNT Libraries Government Documents Department - 39 Matching Results

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Fatigue Life of Steel Base Plate to Pole Connections for Traffic Structures

Description: "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."
Date: January 2011
Creator: Stam, Andrew Philip; Frank, Karl H.; Stern, A. P.; Anderson, T. H. & Richman, N. B.

Proposed TxDOT strategic research program

Description: "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."
Date: October 2010
Creator: Persad, Khali (Khali Ram), 1956-; Gilliland, Cynthia A. Weatherby; Nash, Phil; Machemehl, Randy B.; Stockton, Bill & Cleveland, Theodore

Materials selection for concrete overlays : information survey review and evaluation of existing concrete overlays in Texas

Description: "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."
Date: April 2011
Creator: Kim, Dong Hyun; Trevino, Manuel; Whitney, David P. & Ferron, Raissa

Design and application of accessible land-use modeling tools for Texas regions

Description: "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 Austing region of Texas, but for different case study examples."
Date: August 2010
Creator: Kockelman, Kara; Anjomani, Ardeshir; Paul, Binny M.; Nostikasai, Dian; Tayyebi, Ali & Kharel, Gehandra

Assessing the environmental justice impacts of toll road projects

Description: "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."
Date: October 2010
Creator: Prozzi, Jolanda; Carroll, Lindsey; Loftus-Otway, Lisa Dawn; Bhat, Chandra; Paleti, Rajesh & McCray, Talia M.

Texas roundabout guidelines : final report

Description: "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."
Date: October 2011
Creator: Mills, Alison; Duthie, Jen; Machemehl, Randy B.; Ferguson, Erin; Waller, Travis; Sun, Dazhi et al.

Guidance for erection and construction of curved I-girder bridges

Description: "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."
Date: May 2010
Creator: Stith, Jason; Schuh, Andrew; Farris, Jamie; Petruzzi, Brian; Helwig, Todd; Williamson, Eric et al.

Guidance on extracting value from Texas Department of Transportation's land holdings

Description: "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."
Date: July 2012
Creator: Prozzi, Jolanda; Paes, Thiago; Loftus-Otway, Lisa & Caldas, Carlos

Laboratory evaluation of influence of operational tolerance (acceptance criterion) on performance of Hot-Mix Asphalt Concrete

Description: The objective of the study was to determine the effects of variability in key mix design factors, such as asphalt content, gradation, and density, on the laboratory performance of different hot-mix asphalt samples that were mixed and compacted in the laboratory. Variability was kept within specified limits by the allowable operational tolerances, and performance was addressed through the evaluation of the results obtained from volumetric properties and laboratory tests, such as flexural fatigue test, Hamburg wheel-tracking test, and overlay tester. A series of statistical analyses was conducted to develop relationships between the key mix design factors and the observed laboratory performances of each type of mixture. From the analysis, the effects of the main variables on the results of the performance tests used in this study were found. Finally, a statistically-based sensitivity analysis was conducted to reveal the relationship between different tolerance levels and mixture performance for the individual mixtures types.
Date: June 2010
Creator: Vazquez, Christian G.; Aguiar-Moya, José Pablo; Smit, Andre de F. & Prozzi, Jorge Alberto

Materials selection for concrete overlays : the final report

Description: Concrete overlays have been a rehabilitation method for many years. It has been extensively utilized and studied in other states, but Texas is still at an initial stage of fully implementing the method. The large volume of concrete highways in Texas makes bonded concrete overlays, unbonded concrete overlays, and whitetoppings very viable options. However, there is a lack of educational guidelines for pavement engineers for concrete overlay construction. This research presents the information gathered from literature review, condition survey, and evaluation of existing concrete overlays in Texas. Also, a laboratory research was performed for recommendations for materials selection and construction for concrete overlays. From these, guidelines for materials selection and construction method developed that will assist in future concrete overlays in Texas are presented.
Date: July 2012
Creator: Kim, Dong H.; Fowler, David W.; Ferron, Raissa P.; Trevino, Manuel M. & Whitney, David P.

Proposed Texas Department of Transporation strategic research program : second year report

Description: 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.
Date: August 2011
Creator: Persad, Khali; Machemehl, Randy; Nash, Phillip T.; Cleveland, Theodore G.; Weatherby, Cynthia & Stockton, William

Equipment replacement optimization

Description: "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."
Date: October 2011
Creator: Fan, Wei; Brown, Leonard; Patterson, Casey; Winkler, Mike; Schminkey, Justin; Western, Kevin et al.

Measuring access to transit service in rural transit systems : feedback from the workshops and recommendations for improving the Demand Response Transit accessibility tool

Description: "This report discussed the application of the para-transit patron accessibility analysis tool developed by the University of Texas researchers. The analysis tool is applied to four rural transit agencies in Texas. Workshops were held at these four agencies plus two other agencies. The workshops were undertaken to achieve the following three objectives: (1) Provide an overview of the demand response transit (DRT) accessibility tool developed by the research team and to demonstrate how it can be used as a proactive planning tool by the transit agencies, (2) Obtain feedback from the transit agencies on the results predicted by the DRT Tool, and (3) Identify recommendations for improving the DRT Tool."
Date: August 2011
Creator: Vyas, Gaurav; Bhat, Chandra R. & Ferdous, Zazneen

Geosynthetic-reinforced unbound base courses: quantification of the reinforcement benefits

Description: "As part of Research Project 0-4829, a new testing device was developed and a monitoring program was initiated to evaluate the performance of geosynthetics used as reinforcement for unbound base courses. This implementation involves the use of the new testing device and procedures developed by the 0-4829 research project. Specifically, the testing involves a modified pullout device for characterization of the confined stiffness in geosynthetic reinforcements. The project also provides continued monitoring of 32 experimental test sections constructed on FM2 (Bryan District) for the purposes of correlating field performance with material characterization. The experimental component of this implementation project was accomplished by testing four different geosynthetic reinforcement products in order to verify the draft specifications recommended by project 0-4829. The field component of this implementation project involved continued condition survey, moisture monitoring, falling weight deflectometer (FWD) testing, and weather data gathering in order to establish the threshold of the proposed parameter in the new specification based on field performance."
Date: February 2012
Creator: Zornberg, Jorge G.; Ferreira, J.A.Z.; Gupta, R.; Joshi, R.V. & Roodi, G. H.