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The US Transportation Collection consists of documents from across all transportation modes with specific focus on research reports from US DOT, state DOTs, and other transportation organizations. Bookmark this collection: https://rosap.ntl.bts.gov/collection_ust or https://doi.org/10.21949/1530857.

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Showing 32641 - 32660 of 35448 results
  • Alcohol control in Virginia planning documents for use by agencies of the Commonwealth
    Alcohol control in Virginia : planning documents for use by agencies of the Commonwealth.
    Virginia. Governor's Task Force to Combat Drunk Driving  ...
    1982-01-01 | PDF
    The Governor's Task Force to Combat Drunk Driving was created to confront the problem of drunken driving in Virginia, and to ascertain Virginia's current efforts to address this problem so that these efforts could be assessed and appropriate changes recommended. The planning documents presented in this report were designed to provide an overview of ...
  • An evaluation of the impact of the Virginia driver improvement program on negligent driving 24month report final report
    An evaluation of the impact of the Virginia driver improvement program on negligent driving : 24-month report [final report].
    Lynn, Cheryl
    1982-01-01 | PDF
    This study evaluated the impact of the four basic treatment combinations of the rehabilitation component of the Virginia driver improvement program. This was accomplished through a comparison of the driving records of experimental group subjects who received the treatments with the records of control group subjects who did not. It was hypothesized ...
  • Evaluation of channelizing devices for work zones type II barricades and chevron panels
    Evaluation of channelizing devices for work zones : type II barricades and chevron panels.
    Cottrell, Benjamin H.
    1982-01-01 | PDF
    The objectives of this research were (1) to evaluate the 4-in. (10.2-cm) and 6-in. (15.2-cm) wide alternating diagonal stripes on barricade rails less than 3 ft. (0.92-m) long, and (2) to select the most effective chevron panel. A secondary objective was to investigate minimum sight distance requirements for work zone lane closures. These objective ...
  • Analysis of maintenance costing with emphasis on contracting versus using state forces
    Analysis of maintenance costing with emphasis on contracting versus using state forces.
    Allen, Gary R ;
    Lisle, Frank N
    1982-01-01 | PDF
    The authors present the findings of a study to develop a methodology for analyzing decisions of whether to perform ordinary maintenance, maintenance replacement, and incidental construction with state forces or to let them to contract. In developing the method, the authors interviewed resident engineers and examined the techniques most frequently u ...
  • Efficiency of erosion control practices of the Virginia Department of Highways and Transportation final report
    Efficiency of erosion control practices of the Virginia Department of Highways and Transportation : final report.
    Wyant, David C
    1982-01-01 | PDF
    Twelve streams affected by highway construction were monitored to ascertain the effectiveness of the Virginia Department of Highways and Transportation's erosion and sediment control practices. The streams were located throughout Virginia in areas having different types of soil; viz., silts, sands, and clays. The results of the study indicate that ...
  • Methodology for selecting urban median treatments a users manual
    Methodology for selecting urban median treatments : a user's manual.
    Parker, Martin R
    1982-01-01 | PDF
    No Description
  • Comparison of two freezethaw apparatus
    Comparison of two freeze-thaw apparatus.
    Ozyildirim, H. Celik
    1982-01-01 | PDF
    The purpose of this study was to compare the results of rapid freezing and thawing tests conducted on machine A with results from machine B, which is intended to replace the aging machine A. Concrete samples were prepared to attain levels of resistance to cycles of freezing and thawing. For comparison purposes, tests were conducted using the Resear ...
  • Heatcurved girders deflections and camber loss during and subsequent to bridge construction
    Heat-curved girders : deflections and camber loss during and subsequent to bridge construction.
    Hilton, Marvin H
    1982-01-01 | PDF
    The present AASHTO bridge design specifications require that additional camber be built into steel girders that are to be heat curved. The additional camber is provided to allow for subsequent losses due to the dissipation of residual stresses imposed by the heat-curving process during fabrication of the girders. Many bridge engineers and steel fab ...
  • Installation report evaluation of recycled hot mix asphaltic concrete on Route 220
    Installation report : evaluation of recycled hot mix asphaltic concrete on Route 220.
    Hughes, Charles S
    1982-01-01 | PDF
    This report describes a project in which the bituminous pavement on an approximately 8-mi. (13-km) section of roadway was removed, recycled through a conventional asphalt batch plant, and relaid. The project was accomplished with little difficulty and proved that recycling is an economical, feasible process. The asphaltic mix relaid consisted of ab ...
  • Control of reflection cracking in a fabricreinforced overlay on jointed portland cement concrete pavement
    Control of reflection cracking in a fabric-reinforced overlay on jointed portland cement concrete pavement.
    McGhee, Kenneth H
    1982-01-01 | PDF
    A study of the installation and three-year performance evaluation of a fabric-reinforced bituminous concrete overlay of a jointed concrete pavement is reported. The fabric, a polypropylene in an asphaltic mastic, was shown to act as a significant deterrent to the development of reflection cracks in an overlay exposed to over 30,000 vehicles per day ...
  • Design of overlays based on pavement condition roughness and deflections
    Design of overlays based on pavement condition, roughness, and deflections.
    McGhee, Kenneth H
    1982-01-01 | PDF
    Changing economic conditions have led to a need for more objective means of prioritizing pavement resurfacing needs and for determining the required thickness of resurfacings. Both of these issues have been addressed in the study for which this document constitutes the final report. Earlier reports on the study were directed at the development of a ...
  • Guidelines for the design and placement of curb ramps
    Guidelines for the design and placement of curb ramps.
    Cottrell, Benjamin H
    1982-01-01 | PDF
    Information was obtained through surveys of ten state departments of transportation, four large U. S. cities, and eighteen departments of public works in Virginia. A sample inventory of curb ramps was made in 15 municipalities in Virginia. Interviews with representatives of agencies serving the handicapped and with engineers in charge of planning a ...
  • Determination of rainfall losses in Virginia phase II final report
    Determination of rainfall losses in Virginia, phase II : final report.
    Cruise, James ;
    Yu, Shaw L
    1982-01-01 | PDF
    A procedure is presented by which regional unit hydrograph and loss rate parameters are estimated for the generation of design storm hydrographs for watershed in Virginia. The state is divided into seven hydrological regions, and unit hydrograph and loss rate parameters are computed for each region and then related to watershed characteristics such ...
  • An assessment of exclusive
    An assessment of exclusive.
    Perfater, Michael A
    1982-01-01 | PDF
    More than 70% of motorists returning a questionnaire distributed for the study favored the exclusive/permissive signal, while about 17% said the signal reduced delays, and 30% said it created a hazard. Intersections with one or more right-turn-on-red movements seemed especially susceptible to vehicular conflicts. The ratios of accidents involving l ...
  • Evaluation of ChemCrete interim report
    Evaluation of Chem-Crete : interim report.
    Maupin, G. W
    1982-01-01 | PDF
    Two test sections, one on new construction and the other on a maintenance resurfacing project, were installed in the fall of 1980 to evaluate the proprietary asphalt product Chem-Crete. Dynaflect and density measurements were performed on the experimental and control mixes and the performance of the pavements is being evaluated. Raveling was notice ...
  • Segregation of asphalt mixes caused by surge silos final report
    Segregation of asphalt mixes caused by surge silos : final report.
    Maupin, G. W
    1982-01-01 | PDF
    Segregation of asphalt mixes continues to be a problem in Virginia, particularly with base mixes and coarse surface mixes. Although the problem is encountered primarily on jobs using surge silos, it has been related to other factors such as mix design and handling or paving techniques. This report discusses changes in equipment and production proce ...
  • Relative heating costs for Virginia Department of Highways and Transportation buildings
    Relative heating costs for Virginia Department of Highways and Transportation buildings.
    Pritchard, Alan C
    1982-01-01 | PDF
    This report presents the results of a survey of the energy used to heat various buildings owned and operated by the Virginia Department of Highways and Transportation. Energy intensity and cost intensity indices (EII and CII) for buildings were calculated. These can be used to indicate possible deficiencies in the heating and cooling systems of the ...
  • Evaluation of Microlon and TechnolG final report
    Evaluation of Microlon and Technol-G : final report.
    Sprinkel, Michael M
    1982-01-01 | PDF
    An evaluation was made of the cost-effectiveness of the automotive products Microlon, an engine treatment consisting of Teflon suspended in a solvent, and Technol-G, a gasoline treating additive consisting of a blend of aliphatic and aromatic distillates. Examined in the evaluation were engineering test reports provided by the manufacturers of the ...
  • Installation report experimental mix using foamed asphalt
    Installation report : experimental mix using foamed asphalt.
    Hughes, Charles S
    1982-01-01 | PDF
    This report describes the first foam asphalt mix produced and used in a highway pavement in Virginia. The aggregate used was a local Eastern Shore sand modified with 5% fly ash to improve the gradation. A foam asphalt chamber on a portable pug-mixer was used to produce slightly more than 500 tons of mix. While the early performance of the pavement ...
  • Virginia method for the design of densegraded emulsion mixes
    Virginia method for the design of dense-graded emulsion mixes.
    Hughes, Charles S
    1982-01-01 | PDF
    An investigation into the Illinois method for the design of dense-graded emulsion base mixes had resulted in a report offering several modifications to that procedure. The Bituminous Research Advisory Committee then recommended that the Illinois method, along with the recommended modifications, be adopted for use in Virginia. This report was prepar ...
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