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Showing 35821 - 35840 of 36747 results
  • Autogenous accelerated curing of concrete cylinders Part V ASTM Cooperative Testing Program with additional emphasis on the influence of container and storage characteristics supplemented by data on water bath curing from an earlier council project
    Autogenous accelerated curing of concrete cylinders. Part V, ASTM Cooperative Testing Program with additional emphasis on the influence of container and storage characteristics (supplemented by data on water bath curing from an earlier council project).
    Newlon, Howard
    1971-01-01 | PDF
    Concomitant with the Research Council's studies of accelerated curing for strength testing, Subcommittee II-i of ASTM Committee C-9 was developing and refining accelerated methods for standardization. This development included a cooperative testing program in which nine U. S. and Canadian laboratories, including the Research Council, applied variou ...
  • Slipperiness of highway pavements phase 1 final report
    Slipperiness of highway pavements : phase 1, final report.
    Mahone, David C ;
    Runkle, Stephen N
    1971 | PDF
    To gain knowledge of the wet friction levels needed for various traffic conditions, this study evaluated the relationships between (1) accumulated traffic volumes and pavement friction, and (2) percent wet accidents and pavement friction. In addition the study evaluated speed gradients and machine correlations, and selected thirty test sites for co ...
  • A manual for using the highway noise analysis program Noisesim
    A manual for using the highway noise analysis program "Noisesim".
    Walton, L. Ellis
    1971-01-01 | PDF
    Noisesim was developed under a National Cooperative Highway Research Program study by Boilt, Beranek and Newman of Van Nuys, California. According to the NCHRP, Virginia was the first state to implement this program and utilize the findings for predicting noise simulations for future highways. The implementation of this computer program was viewed ...
  • Aviation medicine translations annotated bibliography of recently translated material VI
    Aviation medicine translations : annotated bibliography of recently translated material, VI.
    Mertens, Ruth Ann ;
    Goulden, D.R.
    1971-01-01 | PDF
    An annotated bibliography of translations of foreign-language articles is presented. The 22 entries are concerned with studies in aviation medicine, vestibular function, body temperature, color vision, cholinesterase, nystagmus, alcohol, vestibulo-oculomotor function, anatomy, stress and air traffic control work, flight stress, anti-smoke hoods, hi ...
  • A comparison of Virginia statutes for a first offense of driving while intoxicated with those of 49 states and the District of Columbia
    A comparison of Virginia statutes for a first offense of driving while intoxicated with those of 49 states and the District of Columbia.
    Ames, W. Allen
    1971-01-01 | PDF
    With respect to those statutory factors bearing on the severity of the sentence (fine, jail sentence, and license revocation), it was concluded that the Virginia Code authorized sanctions that, if consistently imposed, would make the penalty for driving while intoxicated one of the more severe in the nation. On the other hand, the state appeared to ...
  • Bridge aesthetic rating diagrams
    Bridge aesthetic rating diagrams.
    Zuk, William
    1971-01-01 | PDF
    Presented is a systematic methodology for rationally determining the esthetic appeal of bridge designs by the use of paired line drawings where one visual factor at a time is varied. These paired drawings are then judged by either a preselected or randomly selected group of people. An example (using a standard bridge overpass) is selected as a vehi ...
  • Selfstressed sandwich bridge decks
    Self-stressed sandwich bridge decks.
    Zuk, William ;
    Sinha, R. S
    1971-01-01 | PDF
    Proposed is an entirely new type of bridge deck, consisting of an unreinforced lightweight concrete slab made of expanding cement sandwiched between two thin plates of steel. The expanding core serves to prestress the panel. Laboratory tests were conducted on the expansion characteristics of the concrete to determine predictable relationships for e ...
  • Department of Transportation Federal Highway Administration environmental impact statement for Interstate Route 66 13 mile section from Glebe Road to Lee Highway Arlington County Virginia
    Department of Transportation Federal Highway Administration environmental impact statement for Interstate Route 66, 1.3 mile section from Glebe Road to Lee Highway, Arlington County, Virginia.
    Walton, L. Ellis
    1971-01-01 | PDF
    The Virginia Department of Highways has undertaken a comprehensive environmental study of a nine-mile section of Interstate Route I-66. This precedent setting study is the Department's attempt to make this a model highway to the nation's capital. The environmental features included in this specific project demonstrate clearly that a highway can be ...
  • Pedestrian safety the identification of precipitating factors and possible countermeasures appendices
    Pedestrian safety, the identification of precipitating factors and possible countermeasures : appendices.
    Snyder, Monroe B. ;
    Knoblauch, Richard L.
    1971-01-01 | PDF
    The study objective was to identify causes and countermeasuresre levant to pedestrian accidents. Behaviora 1 and descriptive data werecollected by interviews and on-scene observations for over 2,000 pedestrianiccidents in 13 major cities. Subsequent analyses emphasized individualcase causation and accident type classification relevant to countermea ...
  • Noise audiometry
    Noise audiometry.
    Tobias, Jerry V.
    1971-01-01 | PDF
    The displacement of a threshold from its measured-in-the-quiet value to the value it takes in the presence of another sound is masking. Measurement of that displacement is masking audiometry. And the measurement of displacements at a large number of frequencies produces masking patterns.This paper concerns itself with a procedure that produces mask ...
  • Highway signing for safety
    Highway signing for safety.
    Shepard, Frank D
    1971 | PDF
    Signing that effectively warns the motorist of temporary obstructions on or near a roadway is essential to traffic safety. The general objective of this study was to become familiar with and investigate the suitability of various temporary maintenance signing conditions, with particular attention being given to certain sign combinations and message ...
  • A Paint System for the Benjamin Harrison Bridge
    A Paint System for the Benjamin Harrison Bridge
    Creech, Marion F ;
    Clemeña, Gerardo G.
    1971-01-01 | PDF
    In order to find out what was causing the paint failure on the Benjamin Harrison Bridge, two trips to the bridge and surrounding area were made. These field inspections revealed that the west side of the bridge the side facing the chemical plants was noticeably more corroded than the east side. The prevailing wind is from the direction of the plant ...
  • A comparative study of aluminum and steel culverts progress report no 4
    A comparative study of aluminum and steel culverts : progress report no. 4.
    McKeel, Wallace T
    1971-01-01 | PDF
    The results of a comparative study of aluminum and steel culverts at six test sites throughout Virginia indicate that satisfactory durability can be expected of aluminum pipe under exposure to most of the soil and water conditions in the state. The performance of the bare aluminum culverts suggests that bituminous coating of the pipes or paving of ...
  • Autogenous accelerated curing of concrete cylinders Part I Strength results
    Autogenous accelerated curing of concrete cylinders. Part I, Strength results.
    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 strengths of auto ...
  • Physiological responses in air traffic control personnel OHare Tower
    Physiological responses in air traffic control personnel : O'Hare Tower.
    Melton, C.E. ;
    McKenzie, J.M.
    1971-01-01 | PDF
    Physiological and biochemical measurements were made on 22 air traffic controllers at O'Hare tower during five days of the heavy traffic evening shift (1600-2400) and five days of the light traffic morning shift (0000-0800).Pulse rates were higher on the evening shift than on the morning shift. Converging approaching traffic was more excitatory tha ...
  • A case study of deervehicle accidents on I64
    A case study of deer-vehicle accidents on I-64.
    Walton, L. Ellis ;
    McKeel, Wallace T
    1971-01-01 | PDF
    This case study of interstate fencing has indicated several findings which should be reviewed by the Virginia Department of Highways Environmental Quality Division. The major findings are: 1. Approximately 55 deer-vehicle collisions occurred on I-64 between Gum Springs and Charlottesville within the first three months after the highway was opened t ...
  • The criticality of sieve size in asphaltic concrete mixes as measured by volumetric properties and stabilities
    The criticality of sieve size in asphaltic concrete mixes as measured by volumetric properties and stabilities.
    Aderhold, J. Wayne
    1971-01-01 | PDF
    The purpose of this study was to investigate the effects of deviations from the specified aggregate gradation on the stability and volumetric properties of the S-5 mix. The project involved two phases of experimental work. The first phase consisted of designing a control mix to be used as a standard for comparison with the experimental mixes. The m ...
  • Study of sealing practices for rigid pavement joints
    Study of sealing practices for rigid pavement joints.
    McGhee, Kenneth H ;
    McElroy, B. R
    1971 | PDF
    The joint sealing materials and the rigid pavement joint sealing practices employed by Virginia and other highway agencies were studied. The studies showed that Virginia's sealant and joint designs were in need of updating and that higher quality poured sealants as well as preformed sealants could be used to advantage.
  • Fourth Annual Report of the US Department of Transportation 1970
    Fourth Annual Report of the U.S. Department of Transportation: 1970
    United States. Department of Transportation
    1971-01-01 | U.S. Department of Transportation Annual Reports | PDF
    Submitted in compliance of Section 11 of the Department of Transportation Act, the fourth annual report of the Department of Transportation deals with the Department's achievements during Fiscal Year 1970.
  • Review of a bituminous concrete statistical specification final report
    Review of a bituminous concrete statistical specification : final report.
    Runkle, Stephen N ;
    Hughes, Charles S
    1971-01-01 | PDF
    The statistically oriented specification for bituminous concrete production reviewed in this report was used as a basis for acceptance of more than one million tons of bituminous concrete in 1970. Data obtained from this system were analyzed for gradation and asphalt content for such comparisons as how well the production average matched the stated ...
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