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  Partner: UNT Libraries Government Documents Department
 Resource Type: Report
Evaluation of corrosion resistance of improved post-tensioning materials after long-term exposure testing

Evaluation of corrosion resistance of improved post-tensioning materials after long-term exposure testing

Date: October 2011
Creator: McCool, G. E.
Description: Ten full-scale post-tensioned beam specimens were subject to 4 years of aggressive cyclic ponded saltwater exposure. Three of those specimens were additionally exposed to saltwater spray once per month on one anchorage face. Non-destructive monitoring was conducted during the exposure period. This consisted of half-cell potential measurements, AC impedance measurements (for specimens with fully encapsulated tendons), and regular visual inspections. Chloride samples were extracted from the specimens at the end of exposure. "After 4 years, the specimens were autopsied, and all reinforcing elements from the middle of each specimen were examined for corrosion and damage. Anchorage regions were also autopsied and examined for corrosion. Duct systems included galvanized metal ducts, plastic ducts, and encapsulated duct systems. Strand types included conventional strand, hot dipped galvanized strand, copper clad strand, and stainless steel strand. Complete observations are presented."
Contributing Partner: UNT Libraries Government Documents Department
Implementation of technology for rapid field detection of sulfate and organic content in soils

Implementation of technology for rapid field detection of sulfate and organic content in soils

Date: March 2012
Creator: Shon, Chang-Seon
Description: This report discusses a protocol using the Veris 3150 for determination of sulfate-rich soils, which has been implemented to two full-scale projects in Dallas and Paris Districts.
Contributing Partner: UNT Libraries Government Documents Department
Implementation of database for TxDOT ARRA projects

Implementation of database for TxDOT ARRA projects

Date: August 2011
Creator: Persad, Khali R.
Description: 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.
Contributing Partner: UNT Libraries Government Documents Department
CAM mix design with local aggregates

CAM mix design with local aggregates

Date: October 2011
Creator: Smit, Andrè€ de Fortier
Description: "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."
Contributing Partner: UNT Libraries Government Documents Department
Use of performance measurement to include air quality and energy into mileage-based user fees

Use of performance measurement to include air quality and energy into mileage-based user fees

Date: March 2012
Creator: Farzaneh, Reza
Description: "This research project is aimed at establishing a framework for levying MBUFs designed to achieve various air quality improvement policy objectives. This research presents the first step toward a pricing framework based on the concept of performance measurement that systematically defines and incorporates potential air quality goals. The process of developing the proposed framework included defining the interactive role of user fees and pricing in roadway transportation operations and identifying air quality performance measures for determining the appropriate vehicle mileage fee price."
Contributing Partner: UNT Libraries Government Documents Department
Algorithms for routing vehicles and their application to the paratransit vehicle scheduling problem

Algorithms for routing vehicles and their application to the paratransit vehicle scheduling problem

Date: March 2012
Creator: Park, Myoungkuk
Description: "As the demand for paratransit services increases, there is a constant pressure to maintain the quality of service provided to the customers while minimizing the cost of operation: this is especially important as the availability of public funding for paratransit services has been on the decline. Key tasks in accomplishing this objective are efficiently allocating vehicles to service trips and adjusting the schedules of vehicles dynamically in response to calls received by the service providers from the customers on the day of the service."
Contributing Partner: UNT Libraries Government Documents Department
Megaregion freight planning : a synopsis

Megaregion freight planning : a synopsis

Date: March 2012
Creator: Harrison, Rob.
Description: "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."
Contributing Partner: UNT Libraries Government Documents Department
Potential connected vehicle applications to enhance mobility, safety, and environmental security

Potential connected vehicle applications to enhance mobility, safety, and environmental security

Date: February 2012
Creator: Balke, Kevin N.
Description: "Researchers first conducted a comprehensive review of the state-of-the-art connected-vehicle research and technologies. Once researchers had a thorough understanding of the technology, they focused on selecting and developing the near-term practical applications that use connected vehicle technology. The research team then sought expert opinions from the Texas Transportation Institute working group during two brainstorming sessions, which produced two lists of potential applications and prioritized the applications based on deployment feasibility. In particular, a total of five applications were selected for development of the full concept of operations, including two in safety, two in mobility, and one in environmental security. These applications address various problems, including wrong-way driving and unprotected-grade-crossing crashes (safety): work-zone merge efficiency and safety, and freeway speed harmonization (mobility): and slippery pavement-related crashes (environmental security)."
Contributing Partner: UNT Libraries Government Documents Department
Development and validation of a testing protocol for carbon sequestration using a controlled environment

Development and validation of a testing protocol for carbon sequestration using a controlled environment

Date: March 2012
Creator: Storey, Beverly B.
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)."
Contributing Partner: UNT Libraries Government Documents Department
Performance measures for metropolitan planning organizations

Performance measures for metropolitan planning organizations

Date: April 2012
Creator: Moore, Devin
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."
Contributing Partner: UNT Libraries Government Documents Department
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