UNT Libraries Government Documents Department - 24,858 Matching Results

Search Results

Motor Vehicle Traffic Accidents: 1991
Statistics related to motor vehicle traffic accidents in Texas, for the year 1991.
Motor Vehicle Traffic Accidents: 1992
Repot on statistics related to motor vehicle traffic accidents in Texas during 1992.
Motor Vehicle Traffic Accidents: 1993
Report discussing statistics related to motor vehicle traffic accidents in Texas during 1993.
Motor Vehicle Traffic Accidents: 1994
Statistics related to motor vehicle traffic accidents in Texas, for the year 1994.
Motor Vehicle Traffic Accidents: 1995
Statistics related to motor vehicle traffic accidents in Texas, for the year 1995.
Motor Vehicle Traffic Accidents: 1998
A report on motor vehicle accidents in Texas for 1998 detailing statistics related to deaths, injuries, locations of accidents, times of accidents, vehicle types involved in accidents, and causes of accidents.
Shear strengthening of reinforced and prestressed concrete beams using Carbon Fiber Reinforced Polymer (CFRP) sheets and anchors
This report presents experimental results, installation procedures for CFRP sheets and anchors, specifications for fabrication and installation of CFRP anchors, and anchored CFRP shear design guidelines.
Validation of field test methods for use of tire bales
Report discussing an implementation project that validates field test methods for checking he conformity of tire bales used in transportation applications.
An Assessment and Framework of Management Science Applications for TxDOT
Report discussing the results of a project in which researchers implemented a systematic approach to identify the domains within the Texas Department of Transportation (TxDot) where Operations Research and Management Science (OR/MS) techniques could lead to substantial improvements.
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."
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.
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.
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.
Application guide and specifications for geotextiles in roadway applications
Abstract: "Geotextiles, one among the different geosynthetic products, can be used for a number of functions or applications in pavement design. The benefits of using geotextiles in pavements and other transportation applications have triggered a proliferation of products. While this abundance of new products has led to reduction in costs, it has also made it difficult for TxDOT personnel to choose appropriate products based on their engineering properties. Consequently, this report provides the basis for (i) guidelines for proper use and selection of geotextiles in pavements, (ii) material specifications for geotextiles in pavement applications, and (iii) draft construction specifications."
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).
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.
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.
The Economic Efficiency of Allowing Longer Combination Vehicles in Texas
Paper discussing the economic efficiency of allowing longer combination vehicles to operate in Texas.
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."
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.
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.
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."
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."
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.
Performance Measures for Sustainable Freight Movement
This report addresses the issues of freight sustainability at the transportation corridor level.
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.
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."
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.
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.
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.
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."
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."
Geosynthetic-Reinforced Unbound Base Courses: Quantification of the Reinforcement Benefits
Report on the testing involving a modified pullout device for the characterization of the confined stiffness in geosynthetic reinforcements.
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."
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.
RTI Special Studies for TxDOT Administration in FY 2011
Abstract: This research project was established by TxDOT's Research and Technology Implementation Office to address special studies required by the department's Administration during FY 2011. Three short-term, quick-turnaround tasks were completed and are documented.
Identification of priority rail projects for Texas: initial methodology/user manual and guidebook
"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."
Continuous prestressed concrete girder bridges. Volume 1, Literature review and preliminary designs
"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 relevant to continuous precast concrete girder bridges and recommend suitable continuity connections for use with typical Texas bridge girders."
Pavement repair strategies for selected distresses in FM roadways
"Expansive soil is considered one of the most common causes of pavement distresses in FM roadways. Depending upon the moisture level, expansive soils will experience changes in volume due to moisture fluctuations from seasonal variations. The objective of this research was to evaluate existing repair projects on selected FM roadways. Those roadways experienced failures in the form of fatigue and rutting in the wheel path, and longitudinal (faulted) cracking including edge cracking. The causes of those failures were mainly linked to high PI expansive soil and narrow pavement" (from abstract).
Developing a mixture design specification for flexible base construction
"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 for sampling and testing, reduces time and space burdens on producers for maintaining TxDOT-only stockpiles, and maintains or improves the quality of the base."
San Marcos City Park archaeological survey, Hays County, Texas
"At the request of the City of San Marcos, the Center for Archaeological Studies (CAS) conducted archaeological testing of the playground in San Marcos City Park under Texas Historical Commission Antiquities Permit No. 2731. The testing was conducted on October 26 and 29, 2001, to determine whether scheduled renovation of the playground would disturb potentially intact prehistoric or historic cultural material. Shovel testing revealed possibly intact subsurface deposits below approximately 50 cm of disturbed deposits, and subsequently site 41HY319 was recorded. CAS assessed that it is unlikely that cultural resources would be impacted during construction of the playground equipment, as planned construction activities will not extend below the previously disturbed zone."
Performance of lap splices in large-scale column specimens affectedby ASR and/or DEF
"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 construction, curing, deterioration, and final structural load testing."
Compilation of Results of Aquifer Tests in Texas
"The mission of the Texas Water Development Board's (TWDB) Groundwater Resources Division is to collect, interpret, and provide accurate, objective information on the groundwater resources of Texas. In support of this mission, the TWDB has undertaken a long-term process of mapping and characterizing the aquifers of Texas."
Pecos Valley Aquifer, West Texas: Structure and Brackish Groundwater
"The pilot study has helped lay the foundation for future Brackish Resources Aquifer Characterization System projects by developing a database management system in which variety of data can be stored and processed."
Positive feedback: exploring current approaches in iterative travel demand model implementation
"This project researched current trends, practices, and tools in implementing a feedback approach for potential implementation in the TxDOT TDMs."
Statewide implementation of PAVE-IR in the Texas Department of Transportation
Report on demonstrations of Pave-IR thermal profiling on eight construction projects around Texas.
Use of dowel bars at longitudinal construction joints
Report discussing the primary objective of this research project, whcih was to develop rational guidelines on the use of dowel bars in longitudinal construction joints (LCJs) for better-performing concrete pavements without potential longitudinal cracking problems.
Rational Use of terminal Achorages in Portland Cement Concrete Pavements
Report describing the results of a study to look at various systems used to protect bridges from expansion of Portland cement concrete (PCC) due to changes in temperatures. It includes background information on the problem, identifies particular bridges that have concerns, a literature review on the topic, results of field experimentation, collection and analysis of data, and conclusions and recommendations, with supplementary references and appendices.
Implementation of technology for rapid field detection of sulfate and organic content in soils
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.
Best Practice for Using RAS in HMA
"The use of recycles asphalt shingles (RAS) in hot-mix asphalt (HMA) mixtures has the potential to significantly reduce the cost of asphalt paving mixes while conserving energy and preserving the environment. This report documents the best practices for the use of RAS in HMA in terms of Ras processing, characterizing the processed RAS (binder content,gradations, and performance grad [PG]), RAS mix design, production, and field construction."
Back to Top of Screen