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Showing 35241 - 35260 of 36747 results
  • Feasibility of reducing fines in S5 mixes
    Feasibility of reducing fines in S-5 mixes.
    Johnson, H. W
    1975-01-01 | PDF
    The study investigated the feasibility of eliminating aggregate particulates passing the #200 and #100 sieves from a surface mix (S-5) gradation. Feasibility was to be determined on the basis of test mixtures, with particulates deleted, meeting Virginia's specifications. Two aggregates, greenstone and granite, were used to prepare Marshall specimen ...
  • Evaluation of several types of curing and protective materials for concrete part IV final report on performance
    Evaluation of several types of curing and protective materials for concrete : part IV : final report on performance.
    Newlon, Howard
    1975-01-01 | 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 subjected to controlled application of deicers, and (3) exposure of some of the materials on three bridges. The performance of t ...
  • Evaluation of flood risk factors in the design of highway stream crossings V3 Finite element model for bridge backwater computation
    Evaluation of flood risk factors in the design of highway stream crossings : V.3, Finite element model for bridge backwater computation
    Tseng, M. T.
    1975-01-01 | PDF
    No Description
  • Users manual for the Noise 1 area computer program for transportation noise prediction report under project entitled area computer model for transportation noise prediction phase 1 adaptation of MICNOISE
    User's manual for the Noise 1 area computer program for transportation noise prediction : report under project entitled "area computer model for transportation noise prediction : phase 1 : adaptation of MICNOISE".
    Sullivan, Dan ;
    Haviland, J. K
    1975-01-01 | PDF
    It was found that the coordinates of the highways required for Noise 1 could be supplied on punched cards by the Photogrammetry Section of the Department. In preparing data for contour plotting, it was found advisable to divide the area into sectors, with each sector being surrounded by the edges of roads or by internal boundaries. In this manner, ...
  • Highwaywildlife relationships Vol 1 A stateoftheart report
    Highway-wildlife relationships : Vol. 1; A state-of-the-art report
    Leedy, Daniel L.
    1975-01-01 | PDF
    No Description
  • The design of temporary sediment controls with special reference to water quality
    The design of temporary sediment controls with special reference to water quality.
    Poche´, David
    1975-01-01 | PDF
    The laboratory and field trapping efficiencies of several types of flow barriers were ascertained. The materials used to fabricate the barriers were various types of hay straw crushed stone and crushed stone/straw mixes. Field checks of systems of battlers have indicated that flow barriers placed by the contractor have a near zero average efficienc ...
  • A survey and photographic inventory of metal truss bridges in Virginia 18651932 III the Culpeper construction district
    A survey and photographic inventory of metal truss bridges in Virginia, 1865-1932 : III : the Culpeper construction district.
    Deibler, Dan Grove
    1975-01-01 | PDF
    Prior to 1932, road maintenance and construction in Virginia were largely the responsibility of the individual county governments. Bridge construction projects formed a natural part of these activities. Local responsibility resulted in a rich variety of bridge designs built by an equally diverse group of bridge companies. The following report on th ...
  • Evaluation of the new Virginia Dept of Highways and Transportation skid testing trailer
    Evaluation of the new Virginia Dept. of Highways and Transportation skid testing trailer.
    Runkle, Stephen N
    1975 | PDF
    The purpose of this study was to evaluate the new skid trailer obtained by the Virginia Department of Highways & Transportation and to determine how the survey skid testing program should be conducted in light of the findings. Specifically, those things considered about the new trailer were: (1) testing precision; (2) operational error, defined as ...
  • Area computer model for transportation noise prediction phase IIimproved noise prediction methods
    Area computer model for transportation noise prediction : phase II--improved noise prediction methods.
    Haviland, J. K ;
    Sullivan, Dan
    1975-01-01 | PDF
    This report recommended that NOISE 3 initially use the same basic logic as the MICNOISE program for highway noise prediction except that additional options be made available, such as flexibility in specifying vehicle noise sources. A choice of six noise ratings was recommended, including Ldn, the day-night level then being proposed by the EPA for g ...
  • Diagnosis referral and rehabilitation within the Fairfax Alcohol Safety Action Project 1974
    Diagnosis, referral, and rehabilitation within the Fairfax Alcohol Safety Action Project, 1974.
    Lynn, Cheryl
    1975-01-01 | PDF
    This report is a combination of Analytic Study #5 (Diagnosis and Referral) and Analytic Study #6 (Rehabilitation). Data concerning these countermeasures are presented together because of their very close relationship within the Fairfax ASAP. Both the diagnosis and referral, and the rehabilitation systems are described and statistics concerning thei ...
  • Field evaluations of waterproof membrane systems for bridge decks 19721974
    Field evaluations of waterproof membrane systems for bridge decks, 1972-1974.
    McKeel, Wallace T
    1975-01-01 | PDF
    Waterproof membrane systems are being studied by many agencies from the standpoint of their effectiveness in protecting the reinforcing steel in concrete bridge decks against corrosion. Trial applications and evaluations of six such systems, including both preformed sheet and liquid membranes, were made in Virginia during the period from 1972 throu ...
  • Effect of pavement texture on tireroad noise
    Effect of pavement texture on tire-road noise.
    Noble, David F
    1975-01-01 | PDF
    Because of the potentially conflicting considerations for cost, durability, environment and safety the design engineer must have information on each such subject on which to base his decisions. The great variety of pavement textures for affecting the noise levels generated by traffic on the highway, made the need for information on the effect of pa ...
  • Evaluation of the MacDonald scabbler for highway use
    Evaluation of the MacDonald scabbler for highway use.
    Creech, Marion F
    1975-01-01 | PDF
    The MacDonald Scabbler is a small, hand held machine suitable for use in cleaning and roughening concrete surfaces, It weighs 308 pounds (140 kg), has 11 cutting heads, and, as a power source, requires a compressor capable of delivering 365 cubic foot of air per minute (cfm) (10.33 m³/min.) at 100 psi (689.48 kPa). The machine was tested in four op ...
  • An evaluation of the effectiveness of the FAA Management Training School
    An evaluation of the effectiveness of the FAA Management Training School.
    Smith, Roger C. ;
    Rana, Barbara
    1975-01-01 | PDF
    This report covers two aspects of an agency-wide assessment of the FAA Management Training School (MTS) program. The first part of the report considers the evaluation of MTS by approximately 10% of the Supervisory and Managerial Training Course graduates. It was found that supervisors and managers held similar views of MTS: Most felt that the progr ...
  • An analysis of pricesubsidy issues in public transportation and some suggestions of practical importance
    An analysis of price-subsidy issues in public transportation and some suggestions of practical importance.
    Allen, Gary R
    1975-01-01 | PDF
    This report is directed to highway and transportation officials and other state and local government officials faced with questions of public transit subsidies. The questions are very real ones and, in this one's opinion, require well founded answers.* By means of this exposition, the author provides the above audience with several conclusions, rec ...
  • Engineering measures for reducing wrongway driving
    Engineering measures for reducing wrong-way driving.
    Vaswani, N. K
    1975-01-01 | PDF
    Presented is an evaluation of engineering measures instituted in Virginia to reduce incidences of wrong-way driving. Also discussed are the data collected in a survey of wrong-way driving incidents, the causes of wrong-way entries determined through recent on-site investigations, and corrective measures for preventing them. Measures found highly ef ...
  • Foldup concrete construction
    Fold-up concrete construction.
    Zuk, William
    1975-01-01 | PDF
    The fold-up method of concrete construction is a relatively new method of precasting a variety of structural shapes on a single flat surface and then folding portions up to form a three-dimensional shape. Structural members as beams, girders, columns, piers, footing, and retaining walls all having applications in bridge or building construction may ...
  • Freeway Design and Location A Case Study of Urban Residents Attitudes
    Freeway Design and Location: A Case Study of Urban Residents’ Attitudes
    Fuller, Theron K. ;
    Burke, Dock
    1975-01-01 | PDF
    The purpose of this study was to examine the effects of location and design characteristics of urban freeways upon persons with middle and upper incomes living along freeway rights of way. The objectives of the study were~ 1) to determine the effects of freeway location on land use characteristics of middle- and upper-income areas, 2) to determine ...
  • Nuclear field density problems
    Nuclear field density problems.
    Wyant, David C
    1975 | PDF
    The densities of subgrade soil at various locations throughout the state were determined using the different model nuclear gages owned by the Department. In addition, some laboratory testing and sand cote testing were carried out. It was concluded that the direct transmission-standard mode of nuclear density determination could replace the presentl ...
  • Efforts to reduce reflective cracking of bituminous concrete overlays of Portland cement concrete pavements
    Efforts to reduce reflective cracking of bituminous concrete overlays of Portland cement concrete pavements.
    McGhee, Kenneth H
    1975 | PDF
    Studies of efforts in Virginia to reduce the incidence of reflection cracking when portland cement concrete pavements or bases are overlayed with asphaltic concrete are reported. The methods of reflection crack reduction discussed are: (1) The use of sand as a bond breaker between portland cement concrete pavements and asphaltic overlays, (2) the u ...
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