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  Partner: UNT Libraries Government Documents Department
 Decade: 2010-2019
 Year: 2012
 Serial/Series Title: Technical report (Texas Transportation Institute)
Accommodating oversize and overweight loads: technical report

Accommodating oversize and overweight loads: technical report

Date: July 2012
Creator: Middleton, Daniel R.; Li, Yingfeng; Le, Jerry & Koncz, Nicholas
Description: "In this report the research project resulted in a statewide map recommending primary and alternate Oversize/ overweight (OS/OW)route networks for the most common origins and destinations based on historical Motor Carrier Division data. Keeping strategic routes open for OS/OW loads and minimizing the number of reroutes along the way will reduce the impedance and unknowns in this critical segment of the motor carrier industry."
Contributing Partner: UNT Libraries Government Documents Department
Alternative methods of flexible base compaction acceptance

Alternative methods of flexible base compaction acceptance

Date: May 2012
Creator: Sebesta, Stephen; Taylor, Ross. & Frazier, James.
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."
Contributing Partner: UNT Libraries Government Documents Department
Comprehensive evaluation of compaction of asphalt pavements and development of compaction monitoring system

Comprehensive evaluation of compaction of asphalt pavements and development of compaction monitoring system

Date: April 2012
Creator: Kassem, Emad Abdel-Rahman, 1979-; Scullion, Tom; Masad, Eyad; Chowdhury, Arif; Liu, Wenting; Estakhri, Cindy K. et al.
Description: "This report aimed to conduct a comprehensive evaluation of compaction of asphalt pavements and develop software for monitoring field compaction in real time.The results were used to determine the effects of compaction temperature, compaction method, mixture design, and base type on the compactability of asphalt mixtures.Also in this report researchers developed a system for monitoring and documenting the compaction process of asphalt mixtures called compaction monitoring system (CMS)."
Contributing Partner: UNT Libraries Government Documents Department
Development of Texas Transportation Institute's asphalt compaction monitoring system

Development of Texas Transportation Institute's asphalt compaction monitoring system

Date: July 2012
Creator: Liu, Wenting; Scullion, Thomas & Kassem, Emad
Description: "In recent years, the Texas Department of Transportation has made significant progress with the development and implementation of new technologies to measure the uniformity of new hot mix asphalt layer construction. In Project 0-6992, researchers took this check one step further by developing an accurate global positioning system tracking system for compaction rolling so that the compaction effort applied can be monitored for 100 percent of the new surface. This report presents details of the hardware and software developed in this study. The system was field tested on a number of new overlay projects in Texas."
Contributing Partner: UNT Libraries Government Documents Department
Effects of bending and heat on the ductility and fracture toughness of flange plate

Effects of bending and heat on the ductility and fracture toughness of flange plate

Date: May 2012
Creator: Keating, Peter B. & Christian, Lee C.
Description: "This report documents the findings of the Texas Department of Transportation (TxDOT)sponsored research project that investigated the possible causes of the cracking and developed recommendations to prevent the occurrence of such cracking."
Contributing Partner: UNT Libraries Government Documents Department
Energy developments and the transportation infrastructure in Texas

Energy developments and the transportation infrastructure in Texas

Date: March 2012
Creator: Quiroga, CeĢsar A.; Fernando, E. G. & Oh, Jeongho
Description: "This report describes the work completed to measure the impact of increased level of energy-related activities on the Texas Department of Transportation (TxDOT) right-of-way and infrastructure, as well as develop recommendations to reduce and manage TxDOT's exposure and risk resulting from those activities."
Contributing Partner: UNT Libraries Government Documents Department
Evaluation of traffic control devices : year 3

Evaluation of traffic control devices : year 3

Date: March 2012
Creator: Carlson, Paul J.; Pike, Adam M.; Miles, Jeff D.; Ullman, Brooke R. & Borchardt, Darrel W.
Description: This project was established to provide a means of conducting small-scale research activities on an as-needed basis so that the results could be available within months of starting the specific research. This report summarizes the research activities that were conducted between September 2010 and August 2011. There were five primary activities and five secondary activities. 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. In addition, the researchers also started to evaluated criteria for setting 80 mph and 85 mph speed limits, evaluated bridge clearance signing, narrowed the focus of a rotational sign sheeting study, provided technical support for the Texas Manual on Uniform Traffic Control Devices (MUTCD), and provided technical support for the Texas Department of Transportation (TxDOT) sign sheeting specification.
Contributing Partner: UNT Libraries Government Documents Department
Full-depth reclamation : new test procedures and recommended updates to specifications

Full-depth reclamation : new test procedures and recommended updates to specifications

Date: July 2012
Creator: Scullion, Thomas; Sebesta, Stephen; Estakhri, Cindy K.; Harris, Pat; Shon, Chang-Seon; Harvey, Omar et al.
Description: Rehabilitating an old pavement by pulverizing and stabilizing the existing pavement is a process referred to as Full Depth Reclamation (FDR). The stabilized layer becomes either the base or sub-base of the new pavement structure. This process has been used widely for over 20 years in Texas to strengthen and widen structurally inadequate pavement sections. This project developed guidelines on successful FDR practices, developed training materials, and identified areas where improvements to current practices are required. To improve the FDR process, this report includes the following enhancements: (1) As current laboratory testing to select the optimal type and amount of stabilizer takes too long and requires too much material, continue to run parallel testing with the small sample test protocols proposed in this report; (2) Use the falling weight deflectometer (FWD) during construction to validate that the design assumptions are being met; (3) Implement the proposed bond test to select the optimum prime material and amount needed to effectively bond the base to the surfacing materials; (4) Modify the specifications to avoid working in freezing conditions; and (5) Consider implementing the other modifications to specifications proposed in this report.
Contributing Partner: UNT Libraries Government Documents Department
Identification of priority rail projects for Texas: initial methodology/user manual and guidebook

Identification of priority rail projects for Texas: initial methodology/user manual and guidebook

Date: February 2012
Creator: Morgan, Curtis Alan
Description: "This project developed a system of evaluative tools for the Texas Department of Transportation (TxDOT) to prioritize its investments in rail-related projects on a statewide basis. This work is meant to ensure that the limited available funding for rail projects is applied in the most beneficial and efficient manner and is focused upon addressing TxDOT's strategic goals. From the findings, researches recommend a transparent methodology for evaluating proposed rail projects and establishing an initial process through which rail-related investments can periodically be re-evaluated."
Contributing Partner: UNT Libraries Government Documents Department
Implementation of the soil compactor analyzer into test method TEX-113-E : technical report

Implementation of the soil compactor analyzer into test method TEX-113-E : technical report

Date: April 2012
Creator: Sebesta, Stephen & Taylor, Ross.
Description: 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.
Contributing Partner: UNT Libraries Government Documents Department
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