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Nanotechnology-Based System for Damage-Resistant Concrete Pavements

Description: This report's focus was to explore the use of nanotechnology-based nanofilaments, such as carbon nanotubes (CNTs) and nanofibers (CNFs), as reinforcement for improving the mechanical properties of Portland cement paste and creating multifunctional and sensing concrete. (p. 1).
Date: August 2012
Creator: Abu Al-Rub, Rashid K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department

Comparing Perceptions and Measures of Congestion

Description: This report attempts to connect the relationship between perceived congestion as determined by IBM's Commuter Pain Survey results and measured congestion from the Urban Mobility Report (UMR) in 10 cities across the United States.
Date: October 2012
Creator: Le, Minh; Turner, Shawn; Wikander, John & Poe, Chris
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department

Comparison Between Vehicular Emissions from Real-World In-Use Testing and EPA MOVES Estimation

Description: This research study developed a methodology to perform mandatory dynamometer vehicular emissions tests on real roads, performed on-road emissions tests, and compared the test results to the estimates using the current EPA emissions estimation model.
Date: July 2012
Creator: Lee, Doh-Won; Johnson, Jeremy; Lv, Jinpeng; Novak, Kristen & Zietsman, Josias
Item Type: Refine your search to only Report
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
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department

Unknown Foundation Determination for Scour

Description: 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.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department

Alternative Methods of Flexible Base Compaction Acceptance

Description: "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
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department

Positive Feedback: Exploring Current Approaches in Iterative Travel Demand Model Implementation

Description: 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
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department

Research and recommendations for a statewide sign retroreflectivity maintenance program

Description: "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.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department

Evaluation of traffic control devices : year 3

Description: 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.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department

Continuous prestressed concrete girder bridges. Volume 1, Literature review and preliminary designs

Description: "The Texas Department of Transportation (TxDOT) is currently designing typical highway bridge structures as simply supported using standard precast, pretension-ed girders. TxDOT is interested in developing additional economical design alternatives for longer span bridges, through the use of the continuous precast, pretension-ed concrete bridge structures that use spliced girder technology. The objectives of this portion of the study are to evaluate the current stat-of-the-art and practice relev… more
Date: October 2011
Creator: Mander, John B.; Parkar, Anagha S. & Hueste, Mary Beth D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department

Developing a mixture design specification for flexible base construction

Description: "In the Texas Department of Transportation (TxDOT), flexible base producers typically generate large stockpiles of material exclusively for TxDOT projects. This large "state-only" inventory often maintained by producers, along with time requirements for testing and reduced manpower within TxDOT offices, resulted in this project's investigation into a mixture-design specification for flexible base. The goals of this project are to develop a flexible base specification that reduces TxDOT's burden… more
Date: October 2011
Creator: Epps, Jon A.; Sebesta, Stephen; Sahin, Hakan; Button, Joe; Luo, Rong & Lytton, Robert
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department

Performance of lap splices in large-scale column specimens affectedby ASR and/or DEF

Description: "This research program conducted a large experimental program, which consisted of the design, construction, curing, deterioration, and structural load testing of 16 large-scale column specimens with a critical lap splice region, and then compared and calibrated models developed in the analytical program with the experimental behavior. Specimens were carefully instrumented both internally and externally to monitor the strain behavior of the concrete and reinforcing steel from specimen constructi… more
Date: June 2012
Creator: Bracci, Joseph M.; Gardoni, Paolo; Eck, Kathleen M. & Trejo, David
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department

Performance measures for metropolitan planning organizations

Description: "The aim of this project is to consolidate available knowledge and provide guidance to transportation agencies, specifically MPOs, to help them incorporate performance measurement relating to transportation planning and operations. This research includes a survey of agency practices and agency needs, development of guidance on effective performance measurement and allied issues of strategic planning, goal setting, and data collection."
Date: April 2012
Creator: Moore, Devin; Ramni, Tara; Norboge, Nicolas & Turnbull, Katherine
Item Type: Refine your search to only Report
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
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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