UNT Libraries Government Documents Department - 87 Matching Results

Search Results

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.
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."
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.
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."
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."
Internal trip capture estimator for mixed-use developments: Report describing a spreadsheet tool for estimating trip generation for mixed-use developments, single developments that include different types of land use.
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.
Delivery of workshops on corridor management and preservation in Texas: "This report summarizes the delivery and outcome of a series of workshops conducted at 23 Texas Department of Transportation (TxDOT) districts across the state on corridor management and preservation in Texas. The workshops served as follow-up implementation work for research project 0-5606, "Creating Partnerships with Local Communities to Manage and Preserve Corridors." The report provides an overview of the project and documents the dates, locations, and attendance of workshops implemented during the three-year project period."
Development of a model performance-based sign sheeting specification based on the evaluation of nighttime traffic signs using legibility and eye-tracker data: "This report focused on the evaluation of traffic sign sheeting performance in terms of meeting the nighttime driver needs. Using the luminance requirements derived from the study and market-weighted headlamp flux matrices, the researchers developed an approach to sigh sheeting specification that is based on nighttime driver needs."
Estimated impacts of the 2010 census on the Texas transit funding formula: Changes in the population and land area of urbanized areas in Texas will play a significant role in determining the allocation of public transportation funds to service providers in Texas after Census 2010. The purpose of this research report is to review the impacts of the changes in urbanized area population and non-urbanized (rural) population and land area for 2010 on the current Texas Transit Funding Formula for allocation of Federal Section 5311 and state rural and urban funds. This collaborative effort between the Texas Transportation Institute and the Institute for Demographic and Socioeconomic Research at the University of Texas at San Antonio draws upon the complementary expertise of public Transportation planners, demographers, and geographic information systems professionals of the two research organizations. The research project identifies areas with the potential to exceed 200,000 in population and those non-urbanized areas that have potential to become urbanized (over 50,000 people) in 2010. The implications of these changes will be examined relative to the current public transportation funding allocations. The research staff provides a comprehensive assessment of these changes for the state as a whole and for individual transit service providers.
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."
Alternative methods for developing external travel survey data: Report on research examining alternative methods for collecting data on external travel movements and evaluating the potential for synthesizing/modeling external travel in lieu of conducting external surveys. The report also provides recommendations to the Texas Department of Transportation on the most viable methods to estimate external travel movements for use in travel demand models in urban areas in Texas.
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." "
Incorporating sustainability into Texas Department of Transportation's transportation decision making : summary of work performed, methods used and results achieved: "This report summarized the work performed in Fiscal Year (FY) 2009 and 2010 under TxDOT Implementation Project 5-5541-01-"Regional Workshops on Sustainability Enhancement Tool."
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.
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.
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."
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).
Highway safety design workshops: Report on a series of workshops provided by the Texas Department of Transportation on the topic, "Incorporating Safety into the Highway Design Process." The report focuses on workshop content, attendance, and participation evaluation.
Manual for Assessing Safety Hardware test 3-10 on 31-inch W-beam guardrail with standard offset blocks: "The test reported herein corresponds to American Association of State Highway and Transportation Officials (AASHTO) Manual for Assessing Safety Hardware (MASH) test 3-10. This is primarily a severity test that assesses risk of injury to the vehicle occupants."
Field Evaluation of Asphalt Mixture Skid Resistance and Its Relationship to Aggregate Characteristics: Report documenting the findings from the research that was carried out as part of Phase II of Texas Department of Transportation Project 0-5627. The research included measurements and analysis of mechanical and physical properties of aggregates used in surface mixes in the state of Texas.
Exploratory study : vehicle mileage fees in Texas: This project evaluates Vehicle Mileage (VM) fees as a possible funding mechanism for meeting the State of Texas' long-term transportation needs. Researchers conducted listening sessions with the general public and stakeholders to gather input on the concept. Researchers also prepared a decision matrix that can aid policy makers in evaluating the various trade-offs in policy that will be encountered in vehicle mileage fee system development. This study identified both challenges and opportunities for implementation of VM fees.
Implementation of Transverse Variable Asphalt Rate seal coat practices in Texas: An implementation project was performed to expand use of transversely varied asphalt rate (TVAR) seal coat practices in all districts. The project included nine regional workshops, continued field texture testing of test sites, provided one set of sand patch test equipment to each Texas Department of Transportation (TxDOT) district, and published 500 copies of the TVAR Field Guide for broad TxDOT distribution.
Manual for Assessing Safety Hardware test 3-11 of the Texas Department of Transportation Portable Concrete Traffic Barriers with sign support assembly: This report presents the details of the design developed for mounting the traffic control sign support on top a portable concrete traffic barrier (PCTB), description of the full scale crash test performed on the design, and an assessment and evaluation of the performance of the PCTB with the sign support mounted on top according to specifications of "Manual for Assessing Safety Hardware" (MASH). The PCTB mounted sign support assembly anchored to the top of the TxDOT Type 2 PCTB tested for this project performed acceptably for MASH test 3-11.
Planning tools to assess the real estate leveraging potential for roadways and transit: technical report: Report on research examining the implementation of Senate Bill 1266, which provides for alternative funding methods for transportation projects and presenting recommended amendments to address the bill's shortcomings.
Safety and economic impacts of converting two-way frontage roads to one-way : methodology and findings: Report on research develop information to communicate the safety and economic impacts of converting frontage roads from two-way to one-way. Researchers studied five locations in Texas where frontage roads were converted from two-way operation to one-way operation and developed accident modification factors related to frontage road conversion segments that roadway designers can use to guide frontage road conversion project planning.
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.
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.
Development of a precast bridge deck overhang system: This research investigated the overhang and shear capacity of a precast overhang system for potential use during the construction of bridges with precast overhang panels. The research was performed in three phases: the Phase 1 research including work specifically for the Rock Creek Bridge in Parker County, Texas; the Phase 2 research for general precast overhang panels, and; the Phase 3 research investigating the shear capacity. Grout material characteristics were also assessed for possible use in the haunch; constructability issues were also addressed.
Evaluating the Impact of Overweight Load Routing on Buried Utility Facilities [Report 1]: From abstract: This report focuses on the year one project objectives, which were (a) provide a review of technical design and engineering requirements for utility accommodation in Texas, (b) provide a preliminary assessment of potential impact of overweight loads on buried utilities, (c) provide a preliminary assessment of Utility Accommodation Rules (UAR) adequacy to deal with overweight loads on buried utilities, (d) provide preliminary recommendations for a business process for Texas Department of Transportation overweight routing coordination, and (e) provide recommendations for the phase 2 utility damage evaluation.
Realtime monitoring of bridge scour using remote monitoring technology: Report on research performed on the application of instruments including accelerometers and tiltmeters to monitor bridge scour. The instrumentation on the two bridges does not show great hope of application of accelerometers to monitor bridge scour because of a lack of sufficient excitation from traffic. Tiltmeters can provide the integral behavior of the bridge, and therefore are very useful devices for scour monitoring. Guidelines and protocols for scour monitoring based on the US59 over Guadalupe River Bridge and the SH80 over San Antonio River Bridge are provided in the study.
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 field performance evaluation tools and program for pavement marking materials: technical report: Report on a project is to investigate field evaluation plans and procedures, and develop field performance-based evaluation procedures for pavement marking materials.
Field and laboratory investigations for Full Depth Reclamation projects: Full-depth reclamation (FDR) offers a timely, cost-effective solution to restore a pavement's condition. However, FDR represents only one technique in the engineer's toolkit available for addressing deteriorating pavement conditions. The purpose of this project is to provide guidance on determining whether a pavement is a candidate for FDR and, if so, what design, construction, and inspection processes will maximize the performance of the completed reclamation. This report presents initial recommendations for selecting a candidate FDR project and developing design options (including field sampling and lab design protocols). Along with a literature review, these recommendations are illustrated by application on several projects in the Texas Department of Transportation's Austin and Dallas Districts.
Manual for Assessing Safety Hardware test 3-11 on the Texas T101 bridge rail: Report on a study examining the impact performance of T101 bridge rails with pickup trucks. The study determined the T101 bridge rail did not meet Manual for Assessing Safety Hardware evaluation criteria for test 3-11 and the vehicle overturned after losing contact with the barrier.
Operational Performance Management of Priced Facilities: "This study provides a framework in which operating decisions for priced facilities can be made and can guide the changes in operational strategies for a facility over time" (p. i).
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."
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.
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."
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.
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.
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.
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."
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."
Microsurfacing in Texas: This report describes the current state of practice of microsurfacing in Texas and compares it to best practices extracted from existing literature. A survey of DOT personnel, contractors and emulsion suppliers in Texas provides insight into the most crucial factors contributing to the success or failure of a microsurfacing. From the results of the survey, literature reviews, case studies and site visits, the research team analyzed material selection and mix design methods, construction practices, equipment practices and performance measures for microsurfacings.
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."
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."
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."
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.

UNT Libraries Government Documents Department - 87 Matching Results

Search Results

Add Filters

Applied Filters