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Showing 34861 - 34880 of 36747 results
  • Installation of raised pavement markers for reducing incidences of wrongway driving
    Installation of raised pavement markers for reducing incidences of wrong-way driving.
    Shepard, Frank D
    1977 | PDF
    Effectiveness at two interstate off-ramps.
  • Stress analysis of the haunch region in a rigid frame bridge
    Stress analysis of the haunch region in a rigid frame bridge.
    Leftwich, Steven Del ;
    Barton, Furman W
    1977-01-01 | PDF
    The purpose of this study was to obtain an understanding of the behavior and stress distribution in the haunch region of a rigid frame highway bridge. A finite element model of the haunch of the bridge was developed to permit the prediction of stress levels within the haunch region. Loadings on this region were determined using an analytical model ...
  • Basic characteristics and functions of traffic signal equipment
    Basic characteristics and functions of traffic signal equipment.
    Robertson, R. N
    1977-01-01 | PDF
    A questionnaire survey was conducted to determine the types of traffic signal controls utilized by state and local agencies. The majority of the equipment was found to be supplied by three manufacturers; however, there are hundreds of different pieces of control equipment in use. Much of the equipment is quite old, and while it is relatively simple ...
  • Index to FAA Office of Aviation Medicine reports 1961 through 1976
    Index to FAA Office of Aviation Medicine reports : 1961 through 1976.
    Murcko, LaNelle E. ;
    Dille, J. Robert
    1977-01-01 | PDF
    An index to Office of Aviation Medicine Reports (1964-1971) and is presented as a quick reference for those engaged in aviation medicine and related activities. It provides a listing of all FAA aviation medicine reports published from 1961 through 1967 by year, number, author, subject and title.
  • Methods of identifying potential vanpool riders
    Methods of identifying potential vanpool riders.
    Goodwin, George S., ;
    Robertson, R. Neal
    1977 | PDF
    Identifying potential vanpool riders and matching them to form pools are fundamental tasks in the initiation of a vanpool program. The manner in which these tasks are done will determine the costs and benefits of the program. This report presents the data requirements for a vanpool project and reviews the techniques that may be applied in the ident ...
  • Determination of tolerable flaw sizes in full size welded bridge details final report
    Determination of tolerable flaw sizes in full size welded bridge details : final report
    Roberts, R.
    1977-01-01 | PDF
    No Description
  • An evaluation of the feasibility of using photologging in the Virginia Department of Highways and Transportation
    An evaluation of the feasibility of using photologging in the Virginia Department of Highways and Transportation.
    McGeehan, Daniel D
    1977-01-01 | PDF
    A photolog system was pilot tested to obtain data for a comparison of the costs of a statewide photologging program with those incurred in other methods of recording roadway information.
  • Investigation of the use of methanolgasoline blends
    Investigation of the use of methanol-gasoline blends.
    Sprinkel, Michael M
    1977-01-01 | PDF
    An 18-month field test was conducted to determine if the Virginia Department of Highways & Transportation should give serious consideration to the use of methanol as a substitute for gasoline in the operation of its motor vehicles. Five of the eight 1973 and 1974 model vehicles involved in the test were operated for a total of 92,000 miles on a fue ...
  • Live load rating of short span highway bridges as controlled by the exterior girder
    Live load rating of short span highway bridges as controlled by the exterior girder.
    Kinnier, H. L ;
    Barton, Furman W
    1977 | PDF
    The 1973 AASHTO Standard Specifications for Highway Bridge introduced the requirement that "In no case shall an exterior stringer have less carrying capacity than an interior stringer." This statement resulted from the concern that many original exterior stringers became interior stringers when bridges were widened. Since current specifications are ...
  • State of the art in the management of through traffic in residential subdivisions
    State of the art in the management of through traffic in residential subdivisions.
    Vaswani, Nari K
    1977-01-01 | PDF
    Through traffic in residential subdivisions results from motorists seeking shortcuts between two arterial roads, or trying to avoid saturated intersections of two arterial roads. Control techniques to reduce through traffic could be classified into internal, peripheral, or distributed within the residential areas. Internal traffic controls and cont ...
  • Development of Design Procedures for Stabilized Soil Support Systems for Soft Ground Tunneling Vol II Preliminary Results
    Development of Design Procedures for Stabilized Soil Support Systems for Soft Ground Tunneling: Vol. II: Preliminary Results
    Clough, G. Wayne
    1977-01-01 | PDF
    No Description
  • Alternatives to type II cement Part I Preliminary laboratory studies
    Alternatives to type II cement : Part I, Preliminary laboratory studies.
    Ozyildirim, H. Celik
    1977 | PDF
    In this study concrete mixtures incorporating fly ash are being investigated as possible alternatives to mixtures utilizing Type II cements. The mixture characteristics being considered are strength, resistance to freezing and thawing and sulfates, heat of hydration, and volume stability. Control mixtures are made of Types I, II, and III cements. I ...
  • The effectiveness of workshops on management evaluation of traffic safety programs
    The effectiveness of workshops on management evaluation of traffic safety programs.
    Lynn, Cheryl ;
    Mitchell, Deborah
    1977 | PDF
    Nine management evaluation workshops based on The Evaluation of Highway Traffic Safety Programs' A Manual for Managers were held in various cities throughout the United States by the Office of Manpower Development (NHTSA). The analysis reported here was undertaken on their behalf to determine the effect, if any, of the workshops on the knowledge of ...
  • Seat belt and shoulder strap use among urban travelers a comparison of survey results from 1974 1975 and 1976
    Seat belt and shoulder strap use among urban travelers : a comparison of survey results from 1974, 1975, and 1976.
    Stoke, Charles B
    1977-01-01 | PDF
    During nine days in late January 1974, four major metropolitan areas of the state of Virginia were surveyed in an effort to determine seat belt use by urban travelers. Observer-data collectors were stationed at selected signalized intersections. Motorists in the lane adjacent to the curb were shown a clipboard lettered with the question "Are you we ...
  • Accelerated weathering of tough shales final report
    Accelerated weathering of tough shales : final report.
    Noble, David F
    1977-01-01 | PDF
    The purpose of this study was to find or develop a test that would identify a very tough but relatively rapid weathering type of shale that has caused problems when used in embankments as rock. Eight shales, including the problem shale, were collected and tested by the slake, slake durability, and modified sulfate soundness tests, and a new sulfuri ...
  • Evaluation of epoxy coated reinforcing steel
    Evaluation of epoxy coated reinforcing steel.
    McKeel, Wallace T
    1977-01-01 | PDF
    Epoxy coated deck reinforcement was evaluated during the construction of two bridges on Rte. I-77 in Carroll County. The contractor was favorably impressed with the coated steel, which sustained no damage during shipping or deck construction. Among the data collected were resistivity and potential readings, initial chloride contents of the deck con ...
  • Water reuse at highway rest areas evaluation phase
    Water reuse at highway rest areas : evaluation phase.
    Parker, Clinton E
    1977-01-01 | PDF
    The limited availability of water and stringent wastewater effluent standards at rest areas led to the development of a water recycle-reuse system to treat flush water from water closets. Flush fluid for rest area water closets accounts for 95% to 97% of the rest area water requirements. For a flush fluid to be acceptable it must have no objectiona ...
  • A management system for evaluating the Virginia periodic motor vehicle inspection program
    A management system for evaluating the Virginia periodic motor vehicle inspection program.
    Mitchell, Deborah
    1977-01-01 | PDF
    A system for management evaluation of Virginia's periodic motor vehicle inspection (PMVI) program was developed which is similar to that currently in use by the Virginia Department of State Police, except for changes in the sample size of inspection receipts and a modification of the procedure for sampling inspection receipts. Using the procedure d ...
  • Texturing new concrete pavements
    Texturing new concrete pavements.
    Mahone, David C
    1977 | PDF
    Several texturing experiments on heavily traveled portland cement concrete pavements in Virginia are described. Included in the experiments were textures imparted by a heavy burlap drag, metal tines (transverse and longitudinal striations), sprinkled aggregate, mortar removal, and imprinting. All textures were imparted to concrete in the plastic st ...
  • Construction of prestressed concrete singletee bridge superstructures
    Construction of prestressed concrete single-tee bridge superstructures.
    Sprinkel, Michael M
    1977 | PDF
    This report discusses in detail the construction of the first five precast, prestressed concrete, single-tee beam bridge superstructures to be let to contract in Virginia. The data suggest that this single-tee beam enables efficient construction of the superstructures of bridges in the short-span range, because the contractor can move from the brid ...
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