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Showing 27241 - 27260 of 35628 results
  • Use of Vegetative Controls for Treatment of Highway Runoff
    Use of Vegetative Controls for Treatment of Highway Runoff
    Walsh, Frank M. ;
    Barrett, Michael E.
    1998-09-01 | PDF
    Pollutants found in runoff from highways may cause toxic responses in receiving waters for some conditions and, in addition, are obstacles to obtaining water quality goals in the United States. This study investigated the capability of two vegetative controls -- grassed swales and vegetated buffer strips -- to treat highway runoff. A grassed swale ...
  • The Effectiveness of Permanent Highway Runoff Controls SedimentationFiltration Systems
    The Effectiveness of Permanent Highway Runoff Controls: Sedimentation/Filtration Systems
    Keblin, Michael V. ;
    Barrett, Michael E.
    1998-09-01 | PDF
    Original Report Date: October 1997. This study evaluates the performance of sedimentation/ filtration systems that are the most common control for treating highway runoff in the Edwards Aquifer recharge zone. The study includes: 1) monitoring and evaluating the Seton Pond sedimentation/filtration facility in Austin, Texas, and 2) evaluating the fac ...
  • Matching Traffic Safety Strategies to Youth Characteristics A Literature Review of Cognitive Development
    Matching Traffic Safety Strategies to Youth Characteristics: A Literature Review of Cognitive Development
    Eby, David W ;
    Molnar, Lisa J
    1998-09-01 | PDF
    In an effort to reduce the high crash rate and resulting injuries of young drivers, the National Highway Traffic Safety Administration has sponsored research to assess the factors responsible for this heightened crash risk and to determine the implications for traffic safety programs. As part of this research, this review of research literature was ...
  • Summary Report of Research on Permanent Ground Anchor Walls Volume IV Conclusions and Recommendations
    Summary Report of Research on Permanent Ground Anchor Walls, Volume IV: Conclusions and Recommendations
    Weatherby, D. E.
    1998-09-01 | PDF
    Research directed toward improving the design and construction of permanent ground anchor walls is presented. The research focused on tiedback soldier beam walls for highway applications. These walls are generally less than 25 ft high, and they are supported by one or two rows of permanent ground anchors. This volume is part of a four-volume report ...
  • Geopolymer for protective coating of transportation infrastructures
    Geopolymer for protective coating of transportation infrastructures.
    Balaguru, Perumalsamy N.
    1998-09-01 | PDF
    Surface deterioration of exposed transportation structures is a major problem. In most cases,surface deterioration could lead to structural problems because of the loss of cover and ensuingreinforcement corrosion. To minimize the deterioration, various types of coatings have been tried overthree decades with different degrees of success. For succes ...
  • Seasonal instrumentation of SHRP pavements the Ohio State University final report
    Seasonal instrumentation of SHRP pavements, the Ohio State University : final report.
    Wolfe, W. E. ;
    Abdulshafi, O. A.
    1998-09-01 | PDF
    Environmental instruments to measure temperature, soil moisture and frost depth were installed at five test sections of the SHRP pavement project on U.S. 23 north of Delaware, Ohio. At three of these locations tensiometers, which a designed to measure negative pore pressures, were added to the instrumentation package. The pore pressures as recorded ...
  • Life Cycle Cost Analysis in Pavement Design In Search of Better Investment Decisions
    Life Cycle Cost Analysis in Pavement Design: In Search of Better Investment Decisions
    Walls, James ;
    Smith, Michael
    1998-09-01 | PDF
    This Interim Technical Bulletin recommends procedures for conducting Life-Cycle Cost Analysis (LCCA) of pavements, provides detailed procedures to determine work zone user costs, and introduces a probabilistic approach to account for the uncertainty associated with LCCA inputs. The Bulletin begins with a discussion of the broad fundamental principl ...
  • OECD DIVINE Element 1 Accelerated Dynamic Pavement Testing
    OECD DIVINE Element 1 : Accelerated Dynamic Pavement Testing
    Kenis, William J. ;
    Wang, Weijun
    1998-09-01 | PDF
    The loads that trucks impose on pavements and bridges have an important effect on the life of the infrastructure and, therefore, on total national road costs. The Organisation for Economic Co-operation and Development (OECD) Road Transport Research Programme has found that dynamic pavement loading is increasing in OECD countries, resulting in an in ...
  • Implementing Bicycle Improvements at the Local Level
    Implementing Bicycle Improvements at the Local Level
    Williams, J. ;
    Burgess, B.
    1998-09-01 | PDF
    This implementational manual is intended for local governments who want to make improvements to existing conditions that affect bicycling. Thirteen of the most typical situations or factors that impact bicycle use are considered.
  • Summary Report of Research on Permanent Ground Anchor Walls Volume III ModelScale Wall Tests and Ground Anchor Tests
    Summary Report of Research on Permanent Ground Anchor Walls, Volume III: Model-Scale Wall Tests and Ground Anchor Tests
    Mueller, C. G. ;
    Long, J. H.
    1998-09-01 | PDF
    Research directed toward improving the design and construction of permanent ground anchor walls is presented. The research focused on tied back soldier beam walls for highway applications. These walls are generally less than 25 ft high, and they are supported by one or two rows of permanent ground anchors. This volume is part of a four-volume repor ...
  • Adhesion Testing of Epoxy Coating
    Adhesion Testing of Epoxy Coating
    Vaca-Cortés, Enrique ;
    Lorenzo, Miguel A.
    1998-09-01 | PDF
    The hot water and knife adhesion tests developed in this study proved to be a valuable tool for quality control and for in-depth studies of coating adhesion. Hot water and knife adhesion tests were very useful in discriminating and identifying good from bad quality coatings. The tests were relatively easy to perform and did not require special or s ...
  • Repair of EpoxyCoated Reinforcement
    Repair of Epoxy-Coated Reinforcement
    Vaca-Cortés, Enrique ;
    Chen, Hengching
    1998-09-01 | PDF
    Coating damage to epoxy-coated rebars (ECR) in chloride-contaminated concrete may lead to failure of the coating protection system. Damage to epoxy coating can occur during the stages of coating application, handling, storage, transportation, fabrication, assemblage, and/or concrete placement. Epoxy patching materials are manufactured to repair coa ...
  • MeasurementBased Performance Evaluation of a Segmental Concrete Bridge
    Measurement-Based Performance Evaluation of a Segmental Concrete Bridge
    Davis, Rodney T., ;
    Thompson, M. Keith
    1998-09-01 | PDF
    Construction of around 10km of the US 183 elevated highway in Austin, Texas, using precast segmental posttensioned construction provided a unique opportunity to investigate many aspects of segmental bridge technology. The project included balanced cantilever erection, span-by-span erection and some cast-in-place transitions. Some of the piers were ...
  • Suggested Guidelines for Reviewing Private Toll Road Feasibility Studies in Texas
    Suggested Guidelines for Reviewing Private Toll Road Feasibility Studies in Texas
    Glenn, Thomas L.
    1998-09-01 | PDF
    This is the fourth in a series of six research reports focusing on the process of preparing and evaluating feasibility studies for private toll road projects in Texas. State legislation requires that the sponsors of a proposed private toll road project submit a feasibility study to the Texas Department of Transportation (TxDOT). The financial viabi ...
  • Suggested Guidelines for Reviewing Private Toll Road Revenue Forecasts in Texas
    Suggested Guidelines for Reviewing Private Toll Road Revenue Forecasts in Texas
    Glenn, Thomas L.
    1998-09-01 | PDF
    This is the fifth in a series of six research reports focusing on the process of preparing and evaluating feasibility studies for private toll road projects in Texas. State legislation requires that the sponsors of a proposed toll road project submit a feasibility study to the Texas Department of Transportation (TxDOT). The financial viability of a ...
  • Suggested Guidelines for the Preparation of Feasibility Studies for Private Toll Road Projects in Texas
    Suggested Guidelines for the Preparation of Feasibility Studies for Private Toll Road Projects in Texas
    Glenn, Thomas L.
    1998-09-01 | PDF
    This is the third in a series of six research reports focusing on the process of preparing and evaluating feasibility studies for private toll road projects in Texas. State legislation requires that the sponsors of a proposed toll road submit a feasibility study to the Texas Department of Transportation (TxDOT). The financial viability of a propose ...
  • Evaluation of Some Existing Technologies for Vehicle Detection
    Evaluation of Some Existing Technologies for Vehicle Detection
    Middleton, Dan ;
    Jasek, Debbie
    1998-09-01 | PDF
    Most vehicle detection today relies on inductive loop detectors (ILDs). However, problems with installation and maintenance of these detectors have necessitated evaluation of alternative detection systems. Replacing ILDs with better detectors requires a thorough evaluation of the alternatives. This evaluation included examination of the functional ...
  • Handbook of Speed Management Techniques
    Handbook of Speed Management Techniques
    Parham, Angelia ;
    Fitzpatrick, Kay
    1998-09-01 | PDF
    Speeding and speed control are often considered critical issues on residential and collector streets. Activities to reduce speed and volume on residential streets have recently been gathered under the term traffic calming. Speed management goes a step beyond traffic calming by looking at higher speed facilities such as arterials in addition to resi ...
  • Integrated Arterial and Freeway Operation Control Strategies for IVHS Advanced Traffic Management Systems Research Report
    Integrated Arterial and Freeway Operation Control Strategies for IVHS Advanced Traffic Management Systems: Research Report
    Mahmassani, Hani S. ;
    Valdes, Didier M.
    1998-09-01 | PDF
    The main focus of this study is congestion, primarily that occurring on freeway corridors in metropolitan areas. Lack of coordination in the operation of various components of the system is often a major source of inefficiency, resulting in greater delays to motorists than what might be achievable with the existing physical infrastructure. Ineffici ...
  • A Comprehensive Methodology for Predicting Field Skid Resistance of Bituminous Aggregates Based on Laboratory Test Data as Well as Their Past Skid Performance
    A Comprehensive Methodology for Predicting Field Skid Resistance of Bituminous Aggregates Based on Laboratory Test Data as Well as Their Past Skid Performance
    Jayawickrama, Priyantha W. ;
    Rachakatla, Prasanna
    1998-09-01 | PDF
    A comprehensive laboratory and field test program was undertaken with the objective of developing an improved procedure for predicting field skid resistance performance of bituminous aggregates. The field test program included monitoring of 55 test pavement sections that were located in various climatic zones within the state of Texas over the 3-ye ...
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