UNT Libraries Government Documents Department - 87 Matching Results
Search Results
- Rural planning organizations, their role in transportation planning and project development in Texas : technical report
- Report containing research identifying and examining rural planning organizations, their structure and operation, and their role in transportation planning and programming.
- Development of a MASH TL-3 median barrier gate
- Report regarding a median barrier gate designed to both offer protection to motorists and easier cross-median access for emergency and maintenance vehicles.
- Benefits of Public Roadside Safety Rest Areas in Texas : technical report
- Report regarding efforts to develop a benefit-cost analysis methodology for safety rest areas in Texas and to demonstrate its application in select corridors throughout the state. This project also considers approaches to developing rest areas that could reduce costs to the public.
- Rapid Field Detection of Sulfate and Organic Content in Soils: Technical Report
- Report regarding efforts to identify a technique to map the sulfate content of soil over a large area to a depth of 3 to 4 feet. Two devices are noted: an electromagnetic device called EM-38 and a soil conductivity device called VERIS 315.
- The Overlay Tester : A Sensitivity Study to Improve Repeatability and Minimize Variability in the Test Results
- "This report presents a comprehensive sensitivity evaluation of the critical steps of the Overlay Tester (OT) test procedure in an attempt to optimize the OT repeatability and minimize variability in the test results."
- Comprehensive evaluation of compaction of asphalt pavements and development of compaction monitoring system
- "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)."
- Subbase and Subgrade Performance Investigation and Design Guidelines for Concrete Pavement
- Report regarding research into cheaper alternatives for the construction of pavement subbases that maintains adequate pavement performance.
- Performance monitoring pavements with thermal segregation in Texas
- This report investigated the performance of asphalt surface mixtures that exhibited thermal segregation during construction from 2004 to 2009. The results do not show that thermally segregated locations will fail within three to seven years but they do show that instances of thermal segregation may continue to be anomalous locations in the layer that could lead to failures in the pavement structure.
- Effects of bending and heat on the ductility and fracture toughness of flange plate
- "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."
- Development of guidelines for triple left and dual right-turn lanes : technical report
- Report regarding the development of geometric and signal design guidelines for triple left-turn lanes and dual right-turn lanes and then evaluatues the safety of such sites in Texas.
- Synthesis and Study of the Roadside Vegetation Establishment Process
- "In this report the researchers try to provide a more diverse set of tools and options for Texas Department of Transportation (TxDOT) personnel that will help ensure timely vegetation establishment to meet Texas Pollutant Discharge Elimination System (TPDES) regulatory requirements, minimize project delays, and help reduce long-term costs in vegetation development and management."
- White Paper: State of ITS Industry and Assessment of Project Types
- "This report describes the state of the intelligent transportation system (ITS) industry and provides a reference for use in soliciting ITS strategic plan inputs from stakeholders in Texas."
- Traffic signal operations handbook workshop series : final report
- Report documenting the development and conduct of a two-year series of workshops to share information with Texas Department of Transportation (TxDOT) engineers and technicians regarding the cost-effective design and operation of traffic signals at intersections along state highways in Texas.
- Performance Measures for Public Transit Mobility Management
- Report that looks at the state of mobility management practice throughout Texas, as well as national best practices in mobility management. Additionally, this research provides an overview of the varying roles of state departments of transportation in public transit mobility management efforts. The research also presents applied mobility management for agencies seeking to implement mobility management programs as well as a menu of performance measures that can be utilized based on the type and level of program implemented.
- TxDOT uses of real-time commercial traffic data : opportunity matrix
- Based on a TxDOT survey, a review of other state DOTs, and researcher understanding of Intelligent Transportation System (ITS) needs, the Texas Transportation Institute (TTI) team developed a comprehensive list of opportunities for TxDOT to consider pertaining to future use of private sector (PS) data. Specific opportunities for applying private data were reviewed in light of accuracy of the data, coverage areas, data availability, cost, and control of the data stream.
- Development of a MASH TL-2 guardrail-to-bridge rail transition compatible with 31-inch guardrail
- Report discussing the development of a transition roadway rail that is suitable on lower-speed roadways and that is suitable for implementation.
- Energy Developments and the Transportation Infrastructure in Texas: Impacts and Strategies
- "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."
- Texas M-E flexible pavement design system : literature review and proposed framework
- "This report discusses the framework proposed for the Texas Mechanistic-Empirical (TxME) flexible pavement design system, including pavement structure, material properties, traffic, climate, design reliability, and user interfaces."
- High RAP mixes design methodology with balanced performance
- "This report presents a comprehensive study focusing on methodologies to improve the performance of high reclaimed asphalt pavement (RAP) content mixes."
- Research on asset management for safety and operations
- "This report provided Texas Department of Transportation (TxDOT) with guidance on developing a well-designed asset management system as a critical component of the agency's approach to providing for the mobility of its customers, preserving the infrastructure already in place, planning for future improvements of that infrastructure, and being responsive and accountable to the public regarding the investment of their tax dollars."
- Signing strategies for low-water and flood-prone highway crossings
- "In this report the Texas Transportation Institute (TTI) developed a guidelines and recommendations for creating signing uniformity for low-water and flood-prone sections of roadways. TTI also developed criteria for when to implement active water-level detection and advance warning systems at low-water crossings and flood-prone roadway sections."
- A portable toolbox to monitor and evaluate signal operations
- Report regarding a portable computer that interfaces with traffic signal cabinets, monitors and logs events that occur within the cabinet, and then analyzes the log files and creates easy to read reports.
- Work zone positive protection guidelines
- "In this report the goal of the project was to develop implementation guidance that the Texas Department of Transportation (TxDOT) can use to make better decisions regarding when and where to use positive protection in work zones and when to consider exposure control and other traffic control measures that could improve work zone safety."
- Evaluation and development of pavement scores, performance models and needs estimates : phase I activities
- Report that documents the results of two completed tasks for the "Evaluation and Development of Pavement Scores, Performance Models and Needs Estimates" project.
- MASH test 3-37 of the TxDOT 31-inch w-beam downstream anchor terminal
- Report discussing the findings of a study exploring issues related to roadside safety devices. It includes background information, system details, test requirements and evaluation criteria, crash test procedures, crash test results, and conclusions.
- Development of guidelines for pedestrian safety treatments at signalized intersections
- "This document summarized the research conducted and the conclusions reached during the development of guidelines for pedestrian safety treatments at signalized intersections. The guidelines are focused on treatments that alleviate conflicts between left-turning vehicles and pedestrians."
- Studies to determine the effectiveness of automated flagger assistance devices and school crossing devices
- "This report describes the methodology and results of analyses performed to determine motorist understanding, as well as the operational and safety effectiveness, of automated flaggers assistance devices (AFADs) relative to the use of flaggers at lane closures on two-lane, two-way roadways."
- Modern traffic control devices to improve safety at rural intersections
- "The goal of this project was to obtain a better understanding of modern TCD capabilities. Researchers conducted the following tasks literature review, crash data examination, TxDOT district survey, laboratory survey, field study, and development of principles for selecting TCDs."
- Applying the Systems Engineering Approach to Video Over IP Projects
- Abstract: In 2009, the Texas Transportation Institute produced for the Texas Department of Transportation a document called Video over IP Design Guidebook. This report summarized an implementation of that project in the form of a workshop. The workshop was developed and presented as a pilot in Austin in 2010 and taught an additional four times in 2011 in Fort Worth, Lubbock, Houston, and San Antonio.
- Development of the Texas Revenue Estimator and Needs Determination System (T.R.E.N.D.S.) model : FY 2010 activities
- Report that recaps the continued development of the Texas Revenue Estimator and Needs Determination System model.
- Effect of climate change on crop production patterns with implications to transport flows and inland waterways
- "This report analyzed the demand for transportation capacity and changes in transportation flows on inland waterways due to shifts in crop production patterns induced by climate change."
- Mobility and economic effects of system investments in Texas: 2010 to 2020
- "The report summarizes estimates of the consequences of current funding levels and a range of greater and lesser funding amounts. The report describes the population, travel, system extent and expenditure data and analyses used to develop the mobility and economic effect analyses. An associated study by the Center for Transportation Research analyzed pavement maintenance spending and condition. Both the mobility and pavement studies were used as part of the March 2011 Texas 2030 Committee report."
- Landside freight access to airports : findings and case studies
- Report identifying the issues, and infrastructure needs concerning access to airports in Texas for both travel and freight shipping purposes and proposing solutions to the identified problems.
- Peer grouping and performance measurement to improve rural and urban transit in Texas
- "Rural and small urban transit systems in Texas will become even more important with predicted changes in population trends. Rural demographic trends indicate growth in the number of persons age 65 and over coupled with a decrease in population density. Small urban area trends indicate substantial population growth and broadened geographic boundaries, yet resources to provide rural and small urban transit are limited. Therefore, transit managers find it is increasingly important to maximize service efficiency and effectiveness. The purpose of this research was to identify peer groups, performance benchmarks, and strategies used by successful transit providers to achieve high performance. The research project identifies peer groups based on the transit environment within which each agency operates, so that agencies can be compared to other operators who face similar environments. Peer group effectiveness and efficiency performance are examined within and between rural and urban peer groups, and high performers are identified for case studies. Through the case studies, key attributes are identified for achieving high operating efficiency and/or effectiveness. Performance strategies are categorized to provide transit providers with transferrable information to improve performance and increase the return on transit investment."
- Prototype Design for a Predictive Model to Improve Evacuation Operations: Technical Report
- "This project focused primarily on the specific issue of developing a new technical tool to help TxDOT and other key operating agencies/stakeholders better predict when major elements of evacuation operations should be implemented."
- Development of precast bridge deck overhang system: technical report
- "The testing and analyses documented in this report (0-6100-3) provides a new equation for determining the number of shear pockets required for the various shear connector/coupler systems evaluated in this research. This equation was used to determine the number of shear pockets required for the newer TxDOT girders."
- Treatments to reduce the frequency of freeway exit sign hits
- Report of a project to identify and evaluate methods that may reduce the number of sign hit by errant vehicles with field studies conducted near Corpus Christi, Texas.
- Characterization of Exhaust Emissions From Heavy-Duty Diesel Vehicles in the Houston-Galveston-Brazoria Area
- "For this study, a total of 30 heavy-duty diesel vehicles (HDDVs) were selected from City of Houston (COH) fleet based on opacity testing for HEs and random selection for non-HEs. With the selected 30 vehicles, driving and idling emission testing were performed to characterize their emissions with respect to vehicle classes, types (HE or non-HE), and model years."
- Evaluating the Impact of Overweight Load Routing on Buried Utility Facilities [Report 2]
- "The objectives of this project were to (a) provide a review of technical design and engineering requirements for utility accommodation in Texas, (b) provide an assessment of potential impact of overweight loads on buried utilities, (c) provide recommendations for a business process for TxDOT overweight routing coordination, (d) provide recommendations for changes to TxDOT manuals, (e) provide an assessment of UAR adequacy to deal with overweight loads on buried utilities, and (f) provide recommendations for changes to the UAR" (abstract, para. 2).
- Use of Intelligent Transportation Systems in rural work zones
- "This project defined an approach to integrating data collected and traveler information displayed in a work zone with a regional transportation management center and/or other state websites. The project conducted a literature review to define the state of the practice in work zone Intelligent Transportation Systems (ITS; smart work zones) and worked with the Texas Department of Transportation traffic managers to identify their safety and nobility needs in a work zone and where ITS can play a role."
- School Traffic Workshop: Dealing With Texas-Sized Problems Around Schools
- "This report summarized the series of "Traffic around Schools"" workshops conducted throughout the state of Texas to familiarize TxDOT employees and partner agencies with two key products from previous research projects (0-4286 and 0-5470) and other tools and guidance that are available for dealing with problems around schools."
- Development guidance for sign design standards
- "This two-year project was designed to provide TxDOT with comprehensive review and update of mounting details and standards for large and small sign supports, and to provide a mechanism for TxDOT to quickly and effectively evaluate and address high priority needs related to sign support systems."
- Studies to determine the effectiveness of longitudinal channelizing devices in work zones
- "This report describes the methodology and results of analyses performed to determine whether the following longitudinal channelizing device (LCD) applications improve the traffic safety and operations of work zones relative to the use of standard drums."
- Improving stop line detection using video imaging detectors
- Report discussing research conducted on video imaging vehicle detection system [VIVDS] products which resulted in the development of a VIVDS test protocol and performance measures that transportation agencies can use to uniformly evaluate VIVDS products.
- Collision Loads on Bridge Piers: Phase 2. Report of Guidelines for Designing Bridge Piers and Abutments for Vehicle Collisions
- "An instrumented, simulated bridge pier was constructed, and two full-scale collisions with an 80,000-lb van-type tractor-trailer were performed on it. The trailer was ballasted with bags of sand on pallets. The simulated pier was 36 inches in diameter and was supported in the longitudinal direction by two load cells. Force-versus-time data were obtained from the load cells."
- Development of performance-based evaluation methods and specifications for roadside maintenance
- " This report documents the work performed during Project 0-6387, "Performance Based Roadside Maintenance Specifications." "
- Development of a model performance-based sign sheeting specification based on the evaluation of nighttime traffic signs using legibility and eye-tracker data : data and analysis
- "This report presents data and technical analyses for Texas Department of Transportation Project 0-5235. This project focused on the evaluation of traffic sign sheeting performance in terms of meeting the nighttime driver needs. The goal was to develop a nighttime driver needs specification for traffic signs. Full information on the project is presented in Report 0-5235-1 Volume 1."
- Implementation report on PASSER V-07 training workshops
- "The objective of this project was to conduct one pilot workshop and five regular workshops to teach the effective use of the enhanced PASSER V-07 arterial signal timing optimization software."
- The Freight Shuttle System : advancing commercial readiness
- This report summarizes the results of research aimed at advancing the commercial readiness of a new hybrid mode of inter-modal freight transportation called the Freight Shuttle System (FSS).
- Non-vital advance rail preemption of signalized intersections near highway-rail grade crossings
- Technical report examining two strategies were investigated to ensure pedestrian clearance time in intersections near highway-rail grade crossings. The first utilizes a lower-level preemption sequence to guarantee full pedestrian clearance to a terminating phase before the traffic signal starts the preemption sequence. The second strategy uses the pedestrian-omit feature to prevent the controller from activating the pedestrian interval if there is not sufficient time in advance of the start of the preemption sequence to provide full pedestrian clearance.