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25,204 Matching Results
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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."
Date:
December 2011
Creator:
Prozzi, Jolanda; Dumais, Ashley; Cline, Mike; Loftus-Otway, Lisa & Seaborne, Eleanor
Object Type:
Report
System:
The Portal to Texas History
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.
Date:
October 2011
Creator:
Nezamuddin, N.; Jiang, Nan (Writer on transportation); Zhang, Ti; Waller, S. Travis & Sun, Dazhi
Object Type:
Report
System:
The Portal to Texas History
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.
Date:
August 2011
Creator:
Persad, Khali R. & Suri, Jasjyot S.
Object Type:
Report
System:
The Portal to Texas History
Evaluation of Corrosion Resistance of Improved Post-Tensioning Materials After Long-Term Exposure Testing
Technical report on the results of a study evaluating the corrosion resistance of post-tensioned beams after four years of aggressive cyclic ponded saltwater exposure.
Date:
October 2011
Creator:
McCool, G. E.; Ahern, M. E.; Breen, J. E. & Wood, S. L.
Object Type:
Report
System:
The Portal to Texas History
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).
Date:
February 2010
Creator:
McLeroy, Meredith; Fowler, David; Won, Moon & Whitney, David
Object Type:
Report
System:
The Portal to Texas History
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.
Date:
September 2011
Creator:
Gonzales, Epigmenio.; Li, Wenxing; Murphy, Mike; O'Connor, James T.; Bhat, Chandra R. & Yildirim, Yetkin
Object Type:
Report
System:
The Portal to Texas History
Prioritization of highway maintenance functions using multi-attribute decision making with fuzzy pairwise comparison
Report on a methodological framework to help highway agencies develop maintenance plans that are minimally impacted by budget fluctuations. It includes a case study testing the effectiveness of the methodology using data from the Texas Department of Transportation.
Date:
September 2011
Creator:
Zhang, Zhanmin & Liu, Wenxing
Object Type:
Report
System:
The Portal to Texas History
The Economic Efficiency of Allowing Longer Combination Vehicles in Texas
Paper discussing the economic efficiency of allowing longer combination vehicles to operate in Texas.
Date:
August 2011
Creator:
Walton, C. Michael & Bienkowski, Bridget N.
Object Type:
Report
System:
The Portal to Texas History
Evaluating the effect of street network connectivity on first/last mile transit performance
"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
Object Type:
Report
System:
The Portal to Texas History
Implementation of the Soil Compactor Analyzer Into Test Method TEX-113-E : Technical Report
This report describes a study showing that the Soil Compactor Analyzer(SCA) enables excellent precision precision of total statistics of test method Tex-113-E.
Date:
April 2012
Creator:
Sebesta, Stephen & Taylor, Ross
Object Type:
Report
System:
The Portal to Texas History
Unknown Foundation Determination for Scour
This report describes a project to develop a global approach that would reduce the level of uncertainty associated with unknown foundations.
Date:
April 2012
Creator:
Briaud, Jean-Louis; Medina-Cetina, Zenon; Hurlebaus, Stefan; Everett, Mark; Tucker, Stacey; Yousefpour, Negin et al.
Object Type:
Report
System:
The Portal to Texas History
Alternative Methods of Flexible Base Compaction Acceptance
"This report summarizes the concerns expressed with the current Texas Department of Transportation(TxDOT) methods, presents approaches some TxDOT districts have taken to overcome problems, and summarizes the current status of other agencies' efforts at mechanistic based acceptance for flexible base. Also this report presents results and findings from a full-scale compaction experiment."
Date:
May 2012
Creator:
Sebesta, Stephen; Taylor, Ross & Frazier, James
Object Type:
Report
System:
The Portal to Texas History
Community Design and the Incidence of Crashes Involving Pedestrians and Motorists Aged 75 and Older
"This report studies a series of negative binomial regression models to understand how urban form may affect the incidence of total and killed-or-severely-injured (KSI) crashes involving older drivers and pedestrians."
Date:
April 2012
Creator:
Dumbaugh, Eric; Zhang, Yi & Li, Wenhao
Object Type:
Report
System:
The Portal to Texas History
Development of an Early-Stage Toll Revenue Estimation Model
This report contains a standalone, spreadsheet-based model that prepares early-stage traffic and toll revenue estimates.
Date:
May 2012
Creator:
Beaty, Curtis & Lieu, Henry
Object Type:
Report
System:
The Portal to Texas History
Performance Measures for Sustainable Freight Movement
This report addresses the issues of freight sustainability at the transportation corridor level.
Date:
February 2012
Creator:
Farzaneh, Reza; Ramani, Tara; Krishnan, Anupama & Zietsman, Josias
Object Type:
Report
System:
The Portal to Texas History
Positive Feedback: Exploring Current Approaches in Iterative Travel Demand Model Implementation
This report looked at the current Texas Department of Transportation Travel Demand Model (TxDOT TDM) and found that they do not include any impedance or accessibility measures in the trip generation step and found that the best approach is to feed back the output from the traffic assignment step to the trip distribution step.
Date:
January 2012
Creator:
Reeder, Phillip; Bhat, Chandra & Hall, Kevin
Object Type:
Report
System:
The Portal to Texas History
Research and recommendations for a statewide sign retroreflectivity maintenance program
"This report evaluated Texas Department of Transportation's (TxDOT) current sign retroreflectivity maintenance practices, assessed their effectiveness, and recommended statewide sign retroreflectivity maintenance practices that could be easily and effectively implemented to ensure that TxDOT would be in compliance with the new Manual on Uniform Traffic Control Devices (MUTCD) language related to minimum sign retroreflectivity."
Date:
April 2012
Creator:
Carlson, Paul J.; Higgins, Laura L. & Re, Jonathan M.
Object Type:
Report
System:
The Portal to Texas History
Evaluation, presentation and repair of microbial acid-produced attack of concrete
This report evaluates the severity of the deterioration in bridges to determine if microbial induced deterioration (MID) is a significant contributor by visual inspection and a number of tests on twelve selected columns. This report also evaluates the effectiveness of suggested test procedures on identifying microbial attack on concrete and the integrity of deteriorated concrete due to the attack.
Date:
October 2011
Creator:
Hu, Jiong; Hahn, Dittmar; Rudzinski, Walter; Wang, Zhuo & Estrada, Luzelva
Object Type:
Report
System:
The Portal to Texas History
The TCEQ Border Initiative
This document describes how the Texas Commission on Environmental Quality (TCEQ) works with local, state, and federal stakeholders to increase cooperation and exchange knowledge, experience, and technology related to the environment. The TCEQ mission is to maximize the efforts to improve the environment of the U.S. Mexico border region.
Date:
April 2012
Creator:
Texas Commission on Environmental Quality
Object Type:
Pamphlet
System:
The Portal to Texas History
Evaluation of traffic control devices : year 3
Report summarizing the research activities that were conducted between September 2010 and August 2011. The five primary activities were evaluating nighttime visibility along rural highways with bright signs, continuing the evaluation of lead-free thermoplastic pavement markings, evaluating contrast pavement marking layouts, continuing the evaluation of accelerated pavement marking test decks, and providing district support for hurricane evacuation routing.
Date:
March 2012
Creator:
Carlson, Paul J.; Pike, Adam M.; Miles, Jeff D.; Ullman, Brooke R. & Borchardt, Darrel W.
Object Type:
Report
System:
The Portal to Texas History
CAM Mix Design With Local Aggregates
"This study provides revised mix design recommendations for crack attenuating mixtures (CAM) with local aggregates. The use of lower quality aggregates is cost beneficial but limits the application of these mixes in terms of reduced performance. Aggregate guidelines and aggregate quality criteria are provided to enhance the rutting and cracking performance of these mixes. The mix design recommendations as well as aggregate guidelines and quality criteria provided in the report are based on laboratory investigations and field validation is strongly recommended before implementation."
Date:
October 2011
Creator:
Smit, Andrè de Fortier; Prasad, Sivaram; Prozzi, Jorge Alberto & Tahmoressi, Maghsoud
Object Type:
Report
System:
The Portal to Texas History
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."
Date:
November 2011
Creator:
Matthews, Ronald; Seedah, Dan; Ates, Murat; Kim, Kyung Jin; Anderson, Garrett; Vaughn, James et al.
Object Type:
Report
System:
The Portal to Texas History
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."
Date:
October 2011
Creator:
Khwaja, Nabeel
Object Type:
Report
System:
The Portal to Texas History
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.
Date:
June 2012
Creator:
Williams, Chris; Deschenes, Dean & Bayrak, Oguzhan
Object Type:
Report
System:
The Portal to Texas History