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Showing 35521 - 35540 of 36747 results
  • A case study early cracking of unreinforced concrete pavement
    A case study : early cracking of unreinforced concrete pavement.
    McGhee, Kenneth H
    1973-01-01 | PDF
    A study of cores from both the concrete and subbase of the cracked pavement, along with an examination of the in-place subgrade and subbase, suggested that there was no structural damage to the pavement except for the cracking. The situation was aggravated by the poor lateral drainage, which was being corrected by the excavation of shoulder materia ...
  • A case study of three methods used in detecting bridge deck deterioration associated with spalling
    A case study of three methods used in detecting bridge deck deterioration associated with spalling.
    Smith, Charles E
    1973-01-01 | PDF
    The three most widely used current methods for detecting deterioration of concrete bridge decks associated with spalling were compared with a visual inspection of the reinforcing steel and to each other in order to determine the degree of agreement among the methods. The three methods are known as the Chain Drag Method, Measurement of Corrosion Pot ...
  • Selection of a location method for highway data systems
    Selection of a location method for highway data systems.
    Runkle, Stephen N
    1973-01-01 | PDF
    The Virginia Department of Highways has many data systems, and among them highway locations are referenced in various ways. While each of the several present systems is useful for its primary intended purpose, the ability to automatically relate the systems through the use of a common locator method would yield much greater benefits. In fact, the f ...
  • Economics of the maximum limits of motor vehicle dimensions and weights
    Economics of the maximum limits of motor vehicle dimensions and weights
    Winfrey, Robley
    1973-01-01 | PDF
    No Description
  • Characteristics and effectiveness of the Fairfax Virginia ASAP driver improvement schools
    Characteristics and effectiveness of the Fairfax, Virginia ASAP driver improvement schools.
    Stoke, Charles B
    1973-01-01 | PDF
    There are two driver improvement schools in simultaneous operation associated with the Fairfax, Virginia ASAP. One is conducted by the Northern Virginia Community College and the other by the Fairfax County Public Schools. The NVCC organized and developed a specialized alcohol curriculum prior to the establishment of the FCPS program. For this repo ...
  • Drugs driving and the law a report to the governor and General Assembly of Virginia
    Drugs, driving and the law : a report to the governor and General Assembly of Virginia.
    Lorman, Alvin J
    1973-01-01 | PDF
    No Description
  • Evaluation of several types of curing and protective materials for concrete interim report part III performance
    Evaluation of several types of curing and protective materials for concrete : interim report part III : performance.
    Newlon, Howard
    1973-01-01 | PDF
    Various curing and/or protective coatings were evaluated under three conditions: (1) accelerated laboratory freezing and thawing of specimens in 2 percent sodium chloride solution, (2) exposure in an outdoor area of slabs which were subjected to controlled application of deicers, and (3) exposure of some of the materials on three bridges. The perfo ...
  • Particulate measurement and control devices for hot mix asphalt plants
    Particulate measurement and control devices for hot mix asphalt plants.
    Ritz, M. A
    1973-01-01 | PDF
    The emission of particulates is the main form of air pollution from hot mix asphalt plants. The measurement of these emissions in the ambient air may be used by the state and the plant personnel to monitor the quality of air in the area of a plant. Source sampling can be used to determine the amount of pollution created by a given source. If the am ...
  • Application of commercial aircraft accident investigation techniques to a railroad derailment
    Application of commercial aircraft accident investigation techniques to a railroad derailment.
    Braden, Gale ;
    Reed, William
    1973-01-01 | PDF
    Crash investigation techniques utilized by human factors teams in investigating commercial airline crashes have been applied in the analysis of a railroad train derailment - crash. Passengers in cars that remained upright experienced very low deceleration forces and practically no injuries in stopping from a speed of 90 miles per hour over distance ...
  • Methods for increasing the harshness of texture on old concrete pavements mechanical alteration with the Klarcrete machine
    Methods for increasing the harshness of texture on old concrete pavements : mechanical alteration with the Klarcrete machine.
    Creech, Marion F
    1973-01-01 | PDF
    Experiments were performed with the British Klarcrete machine-on the Emporia bypass (I-95) in Greensville County to determine if it was capable of removing the top layer of roadway to a depth of between 1/8 to 1/4 inch, and in so doing expose a fresh surface of highly fractured coarse aggregate to give a better skid resistance. In addition, experim ...
  • Initial studies of a flexural member composed of glassfiber reinforced polyester resin
    Initial studies of a flexural member composed of glass-fiber reinforced polyester resin.
    McCormick, Fred C
    1973-01-01 | PDF
    An investigation was conducted of the structural behavior of a flexural member composed entirely of glass-fiber reinforced polyester resin. Three experimental girders were fabricated and load-tested in the laboratory. The physical characteristics of the members included a triangular cross section, a top flange built up with preformed shapes, a comb ...
  • Evaluating accident rates on Virginias secondary road system
    Evaluating accident rates on Virginia's secondary road system.
    LaBaugh, William C
    1973-01-01 | PDF
    In order to establish priorities for allocating highway funds available for safety improvements, an investigation was made of a method for ranking the state's counties according to their accident histories. Million vehicle miles traveled, registered vehicles, and registered vehicles times road miles were used to normalize the counties' accident sta ...
  • Results of reflective crack questionnaire survey
    Results of reflective crack questionnaire survey.
    Hughes, Charles S ;
    McGhee, Kenneth H
    1973-01-01 | PDF
    Department engineers were surveyed to obtain their opinions on the potential detrimental effects of transverse reflective cracks through the surface course of bituminous pavements and the costs of preventive measures. The majority of respondents (67%) stated that the cracks were only moderately detrimental, and 49% believed no additional cost for p ...
  • Evaluation of strains in bituminous surfaces stiffnessfatigue investigation
    Evaluation of strains in bituminous surfaces : stiffness-fatigue investigation.
    Maupin, G. W
    1973 | PDF
    The study was designed to determine if strains in Virginia's thin asphaltic pavements were high enough to cause early fatigue failure. Strains were computed with the Chevron multilayer computer program, and also measured on selected highways using electrical strain gages and a dynamic recording system.
  • A Primer on Motor Vehicle Air Pollution
    A Primer on Motor Vehicle Air Pollution
    Clemeña, Gerardo G.
    1973-01-01 | PDF
    This primer presents a brief state-of-the art review of motor vehicle air pollution. Its purpose is to aid highway personnel in understanding the nature of this environmental problem on our highways and to present possible solutions for its abatement. The primer discusses the type of vehicular pollutants (namely, carbon monoxide, hydrocarbons, oxid ...
  • Evaluation of social impact a suggested approach
    Evaluation of social impact : a suggested approach.
    Perfater, Michael A ;
    Howell, David R
    1973-01-01 | PDF
    In recent years, the investigation of the effects of highway improvements on the social structure existing in the chosen highway corridor has become a necessary part of the transportation planning process. The environmental impact statement, as required by the 1970 Federal Aid Highway Act, stipulates that the social effects of the proposed highway ...
  • Recidivism rates as a measure of the effectiveness of the rehabilitation and treatment countermeasure of the Fairfax Virginia ASAP 1972
    Recidivism rates as a measure of the effectiveness of the rehabilitation and treatment countermeasure of the Fairfax, Virginia, ASAP, 1972.
    Lynn, Cheryl
    1973-01-01 | PDF
    The rehabilitation countermeasure of the Fairfax, Virginia, ASAP is concerned primarily with four modes of treatment: (1) the Fairfax Driver Improvement Schools, (2) the Community Alcohol Center Clinic of the Division of Alcohol Services, (3) the Fairfax Mental Health Center, and (4) the Fairfax Alcoholism Continuing Evaluation. These programs are ...
  • The compilation and usage of condemnation proceedings data
    The compilation and usage of condemnation proceedings data.
    Allen, Gary R
    1973-01-01 | PDF
    1. Although there appear to be many factors which affect the magnitude of awards in right-of-way condemnations, the problem of testing for the significance of those factors is not insurmountable. This report provides an example of such testing. 2. There appears to be no significant relationship between the months delay from the date of original off ...
  • Analysis of express busfringe parking operations
    Analysis of express bus-fringe parking operations.
    Demetsky, Michael J.
    1973 | PDF
    No Description
  • Drinkingdriving attitudes a survey of Fairfax County
    Drinking-driving attitudes: a survey of Fairfax County.
    Rodman, Reed M.
    1973-01-01 | PDF
    The objective of this study was to gather and tabulate baseline data on selected attitudes and opinions held by the public of Fairfax County, Virginia. The study was designed to assist the program of the Alcohol Safety Action Project, currently in operation in that county. The subject matter of this initial study of Fairfax County was public opinio ...
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