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Showing 35841 - 35860 of 36747 results
  • The Virginia method of determining the cement content of freshly mixed cementsoil mixtures a manual prepared for the use of the Virginia Dept of Highways
    The Virginia method of determining the cement content of freshly mixed cement-soil mixtures : a manual prepared for the use of the Virginia Dept. of Highways.
    Anday, M. C.
    1971 | PDF
    This manual describes a new method developed by the author, based on ASTM Method D2901, for determining the cement content of freshly mixed soil cement. The manual contains information on apparatus, reagents, procedures, source of equipment and reagents, forms, and a sampling plan.
  • Case study 3 severe scaling of an interstate bridge deck and Potentially reactive carbonate aggregates progress report 6 partial an example of bridge deterioration promoted by alkalicarbonate reaction
    Case study #3 -- severe scaling of an interstate bridge deck, and Potentially reactive carbonate aggregates, progress report #6 (partial): an example of bridge deterioration promoted by alkali-carbonate reaction.
    Ozol, Michael A ;
    Newlon, Howard
    1971-01-01 | PDF
    The project designated "Concrete Durability Studies" comprises case studies of unusual durability, either in kind or extent. These case studies are directed toward situations in which appearances suggest materials or construction rather than structural causes. Included in this project as Case Study #3 is an occurrence of severe scaling and pattern ...
  • A comparison of the legibility and visibility of enamel and reflectorized 1971 Virginia license plates
    A comparison of the legibility and visibility of enamel and reflectorized 1971 Virginia license plates.
    Stoke, Charles B ;
    Simpson, C. H
    1971-01-01 | PDF
    The Safety Section of the Virginia Highway Research. Council carried out observation tests of the legibility and visibility of reflectorized and enamel license plates. The primary objectives were to determine the comparative legibility and visibility distances of these plates under low beam headlights and from several angles of approach. Fifteen su ...
  • Soil Erosion Control on New Construction Projects A Bibliography
    Soil Erosion Control on New Construction Projects: A Bibliography
    White, Frederick S.
    1971-01-01 | PDF
    Bibliography on Soil erosion control on new construction projects.
  • Bituminous concrete overlay studies
    Bituminous concrete overlay studies.
    McGhee, Kenneth H
    1971-01-01 | PDF
    Deflection tests conducted on eight sections of primary highway, both before and after asphaltic concrete resurfacings, were analyzed as a study of the utility of such tests in the design of overlays. The application of tentative traffic and allowable deflection criteria showed that seven of the eight projects had deflections reduced to a satisfact ...
  • Legislative recommendations of the Virginia Highway Safety Commission to the 1972 Virginia General Assembly
    Legislative recommendations of the Virginia Highway Safety Commission to the 1972 Virginia General Assembly.
    Micas, Steven L
    1971-01-01 | PDF
    In 1970, alcohol contributed to the deaths of over 340 drivers on the Commonwealth of Virginia's roads and a total of 19,000 crashes. Until 1972, Virginia retained the 0.15% presumptive level of intoxication. Advantages of the 0.10% presumptive level included increased deterrence and greater concurrence with medical knowledge as to when a driver's ...
  • Autogenous accelerated curing of concrete cylinders Part III Temperature relationships
    Autogenous accelerated curing of concrete cylinders. Part III, Temperature relationships.
    Cook, Larry M
    1971-01-01 | PDF
    Forty-eight different concrete mixes were designed to investigate the influence of cement types (II, III, and V), cement contents (450, 550, and 650 lb. per cu. yd.), water cement ratios (0.4, 0.5, and 0.6), admixtures (accelerator, retarder, and air entraining agent), and initial mixture temperatures (50°F, 70°F, and 90°F) on the temperature devel ...
  • Modeling of VSTOL noise in city streets
    Modeling of V/STOL noise in city streets
    Lyon, Richard H. ;
    Pande, Lalit
    1971-01-01 | PDF
    No Description
  • Evaluation of diagrammatic signing at Capital Beltway exit no 1
    Evaluation of diagrammatic signing at Capital Beltway exit no. 1.
    Hanscom, Fred R
    1971-01-01 | PDF
    Much research to eliminate driver confusion at high-speed interchanges is being directed toward the application of diagrammatic signing. In this study, one conventional sign on the westbound approach to Exit No. 1 of the Capital Beltway was replaced by a diagrammatic sign to determine the effect of the new sign on driver behavior. Before and after ...
  • Environmental impact case study Project 0100077105 C501 Dublin Virginia
    Environmental impact case study : Project 0100-077-105, C-501 : Dublin, Virginia.
    Schafer, Scott ;
    McGeehan, Daniel D
    1971-01-01 | PDF
    At the request of the Environmental Quality Division of the Virginia Department of Highways, the Environmental and Economics Section of the Virginia Highway Research Council conducted a study to determine the probable socioeconomic and environmental impact of the proposed improvement of Route 100 north of Dublin. This evaluation was a part of the D ...
  • Proposed methodology for estimating the impact of highway improvements on urban air pollution
    Proposed methodology for estimating the impact of highway improvements on urban air pollution.
    Reed, Wallace E
    1971-01-01 | PDF
    The aim of this methodology is to indicate the expected change in ambient air quality in the vicinity of a highway improvement and in the total background level of urban air pollution resulting from the highway improvement. Both the jurisdiction in which it is located and groups living adjacent to the proposed improvement should be made aware of th ...
  • HeadIn Angle or Parallel Parking Bibliography
    Head-In, Angle, or Parallel Parking: Bibliography
    White, Fredrick S.
    1971-01-01 | PDF
    The selective bibliography contains 26 abstracts on head-in, angle, and parallel parking.
  • Guide for Truck Weight Study Manual 1971
    Guide for Truck Weight Study Manual (1971)
    United States. Federal Highway Administration
    1971-01-01 | PDF
    No Description
  • Driving under the influence of alcohol determining an optimum sanction
    Driving under the influence of alcohol : determining an optimum sanction.
    Ames, W. A ;
    Peters, Eric G
    1971-01-01 | PDF
    Numerous elements must be considered in the design of an optimal statutory scheme for the definition and enforcement of the prohibition against driving under the influence of alcohol. Psychological factors determine the extent to which the statute has deterrent effect. Administrative factors affect the ability of police officers and judicial person ...
  • A Theory of driver motivation the results of structured group interviews with civic and service club groups traffic safety views of older drivers
    A Theory of driver motivation : the results of structured group interviews with civic and service club groups : traffic safety views of older drivers.
    Virginia Highway Research Council
    1971-01-01 | PDF
    Although there were divisions in opinions pertaining to many matters in highway safety, there was a general consensus over the following items: (1) Personal automobiles are the most convenient form of transportation. While there are other modes of mobility, they only delay the inevitable function of an individual operating a motor vehicle to reach ...
  • Environmental impact case study Martinsville bypass
    Environmental impact case study : Martinsville bypass.
    McGeehan, Daniel D ;
    Walton, L. Ellis
    1971-01-01 | PDF
    At the request of the Environmental Quality Division, the Environmental and Economics Section of the Virginia Highway Research Council conducted an environmental impact study of the proposed Route 220 bypass around Martinsville. This evaluation of the social, economic, and environmental considerations was initiated as part of the Department's effor ...
  • An evaluation of two bridge deck overlay systems on the Rte 85 bridges over the Roanoke River
    An evaluation of two bridge deck overlay systems on the Rte. 85 bridges over the Roanoke River.
    Hilton, Marvin H
    1971-01-01 | PDF
    Because of exposed reinforcing steel in some areas of the decks, the interstate route 85 bridges over the Roanoke River were treated with overlays in August 1969. In order to evaluate two different materials on a comparative basis, the Department of Highways decided to apply a Guardkote 250 (epoxy) mortarmix overlay to the SBL deck, and a latex (DO ...
  • Autogenous accelerated curing of concrete cylinders Part IV Moisture relationships
    Autogenous accelerated curing of concrete cylinders. Part IV, Moisture relationships.
    Cook, Larry M
    1971-01-01 | PDF
    Eighteen different concrete mixtures were proportioned to investigate the influence of cement types (II and III), water cement ratios (0.4, 0.5, and 0.6), and admixtures (accelerator, retarder, and air entraining agent) on the moisture changes during autogenous curing of concrete cylinders. A total of 360 concrete cylinders were made comprising aut ...
  • A method for evaluating the structural performance of subgrades andor the overlying flexible pavements
    A method for evaluating the structural performance of subgrades and/or the overlying flexible pavements.
    Vaswani, N. K
    1971-01-01 | PDF
    The structural evaluation of flexible pavement is now carried out mostly by deflection measuring devices such as the dynaflect or Benkelman beam. The object of this investigation was to determine whether the properties of the deflected basin measured by these devices on the pavement surfaces could enable evaluation of the subgrade and/or its overly ...
  • General aviation structures directly responsible for trauma in crash decelerations
    General aviation structures directly responsible for trauma in crash decelerations.
    Swearingen, John J.
    1971-01-01 | PDF
    An analytical study of general aviation accident injuries is presented. Needs for improvement of both the crash design of the interior of the cockpit and the structural integrity of the cockpit itself are clearly illustrated. Crash safety design in light aircraft has fallen so far behind that for the automobile that death rates per 100,000,000 pass ...
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