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The US Transportation Collection consists of documents from across all transportation modes with specific focus on research reports from US DOT, state DOTs, and other transportation organizations. Bookmark this collection: https://rosap.ntl.bts.gov/collection_ust or https://doi.org/10.21949/1530857.

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Showing 34081 - 34100 of 35438 results
  • The effect of diagrammatic signing at head speed interchanges final report by Frank D Shepard
    The effect of diagrammatic signing at head speed interchanges; final report, by Frank D. Shepard.
    Shepard, Frank D.
    1974 | PDF
    Improvements in highway guide signing at interchange areas are needed to reduce driver confusion and the accidents that result from it. One possible means of improving traffic operations within interchange areas is through the use of diagrammatic signs that give a graphic representation of the highway or interchange ahead. This study consisted of a ...
  • Freeway operations analysis of I80 to I29 interchange
    Freeway operations analysis of I-80 to I-29 interchange.
    Brewer, K.A. ;
    Ring, S.L.
    1974-01-01 | PDF
    At the request of the Iowa State Highway Commission, the Engineering Research Institute observed the traffic operations at the Interstate 29 (1-29) and Interstate 80 (1-80) interchange in the southwest part of Council Bluffs.
  • Vibratory compaction of bituminous concrete where does it stand
    Vibratory compaction of bituminous concrete -- where does it stand?.
    Hughes, Charles S
    1974-01-01 | PDF
    A questionnaire concerning the specifications on the use of vibratory rollers on bituminous concrete was sent to the 50 state highway agencies. All 50 agencies replied, and many indicated that their specs were in a state of change. The report presents the survey results. Field experience is discussed under five headings: (1) dual-drum density vs. s ...
  • The Virginia highway construction and maintenance fund a survey of revenue sources 19731974
    The Virginia highway construction and maintenance fund : a survey of revenue sources, [1973-1974].
    Raab, Linda ;
    Daniel, Thomas
    1974-01-01 | PDF
    No Description
  • Subgrade moisture temperature variations under road pavements in Virginia
    Subgrade moisture & temperature variations under road pavements in Virginia.
    Vaswani, N. K
    1974-01-01 | PDF
    In this investigation the changes in the subgrade moisture content under five road pavements ranging in age from new to about ten years old were determined and evaluated. The moisture content was determined by means of a nuclear moisture depth probe. This investigation has shown that: (1) the higher compaction and dry density of the subgrade soil, ...
  • Seat belt and shoulder strap use among urban travelers interim report
    Seat belt and shoulder strap use among urban travelers : interim report.
    Stoke, Charles B
    1974-01-01 | PDF
    Because of the need to establish a data baseline for belt usage without mandatory legislation, a survey of selected areas of the state of Virginia was conducted during January 1974 to determine lap and shoulder belt use by urban travelers. Observer-data collectors were positioned at preselected signalized intersections. Over a nine-day period, data ...
  • Seat belts their use among drivers killed in fatal crashes in Virginia
    Seat belts : their use among drivers killed in fatal crashes in Virginia.
    Lynn, Cheryl ;
    Simpson, Clinton H
    1974-01-01 | PDF
    SR300 Accident Report forms and corresponding Medical Examiner's reports were examined for fatal crashes which occurred during fiscal year 1973. The status of seat belt usage was noted for drivers whose deaths were directly related to the accidents and in whose cars seat belts were installed. In addition, data on 32 other variables available in the ...
  • Test procedures and data input techniques for skid testing
    Test procedures and data input techniques for skid testing.
    Runkle, Stephen N
    1974-01-01 | PDF
    The purpose of this report is to describe the system for obtaining and handling skid data, including skid testing procedures and data input procedures. While all testing devices used in Virginia are covered (other than the British portable tester), the emphasis is on those procedures to be followed in operating the new skid trailer being obtained b ...
  • Review of a statistical specification for pugmill mixed material
    Review of a statistical specification for pugmill mixed material.
    Runkle, Stephen N
    1974-01-01 | PDF
    Since the spring of 1964, the Virginia Highway Research Council has been developing and implementing statistical specifications for highway operations. One of these specifications is used for the acceptance of pugmill mixed materials. The purpose of this study was to review the data obtained under the present statistical specification for pugmill m ...
  • Compensation for noise damaged property
    Compensation for noise damaged property.
    Merrill, Dennis G
    1974-01-01 | PDF
    The U.S. Constitution and the constitution of every state, except North Carolina, requires "just compensation" to be made for property taken by eminent domain. Courts both in Virginia and elsewhere have taken a very narrow view of this requirement where there is only indirect damage to property. Reformers, unhappy with the failure of government to ...
  • Pavement marking extensions for deceleration lanes
    Pavement marking extensions for deceleration lanes.
    Shelor, John D
    1974-01-01 | PDF
    Pavement markings have definite and important functions in a proper scheme of traffic control. One such marking, the pavement edge line, has received much favorable public reaction. One of the limitations of the edge line as conventionally applied is that it is broken at all intersecting roads and streets, which leaves the motorist without marking ...
  • Partialdepth precast concrete patching
    Partial-depth precast concrete patching.
    Creech, Marion F
    1974-01-01 | PDF
    Experiments were performed with partial-depth precast concrete patching to determine the feasibility of the method. In the experiments prefabricated slabs of various sizes, stockpiled near the pavement repair site were installed in machine cut holes in the pavement and cemented into place to make 68 patches. To determine the feasibility of using th ...
  • Water reuse at highway rest stations
    Water reuse at highway rest stations.
    Ritz, Michael A
    1974-01-01 | PDF
    A laboratory biological wastewater treatment system was operated to investigate the effects of wastewater effluent recycle on the treatment system and the effluent water quality. This concept is being investigated for use at highway rest areas in the Commonwealth of Virginia where it is desirable to utilize biologically treated and filtered effluen ...
  • Response of plain concrete to a state of biaxial fatigue loading equipment and technique
    Response of plain concrete to a state of biaxial fatigue loading : equipment and technique.
    Smith, Charles E
    1974-01-01 | PDF
    The fatigue strength of concrete is an important factor in the design of certain structures, particularly those associated with transportation functions. A considerable body of research has been developed on fatigue using specimens subjected to uniaxial loadings. The purpose of this project was to study concrete subjected to a state of biaxial fati ...
  • Design of bituminous surface mixes with high skid resistance
    Design of bituminous surface mixes with high skid resistance.
    Johnson, H. W
    1974-01-01 | PDF
    The Virginia Highway Research Council has proposed a study of the skid resistance of bituminous surfaces incorporating relatively hard and expensive aggregates. The hardness of the aggregates to be used aluminum oxide (Exolon) and calcined kaolin -- is expected to contribute appreciably to the lasting skid resistance of the surfaces. Since these ha ...
  • Evaluation of remedial treatments at skid accident locations
    Evaluation of remedial treatments at skid accident locations.
    Payne, Charles W
    1974-01-01 | PDF
    The Virginia Department of Highways has for many years been concerned with the slipperiness of highway pavements, and has undertaken remedial action at numerous high wet accident locations. The purpose of this study was to evaluate the remedial action taken at 18 locations to determine if the percentages of wet accidents were significantly reduced. ...
  • Investigation of asphalt content design for opengraded bituminous mixes
    Investigation of asphalt content design for open-graded bituminous mixes.
    Maupin, G. W
    1974-01-01 | PDF
    Several design procedures associated with determining the proper asphalt content for open-graded bituminous mixes were investigated. Also considered was the proper amount of tack coat that should be placed on the old surface prior to paving operations. The design procedures obtained from other highway agencies were evaluated in the laboratory for t ...
  • An evaluation of the erosionsiltation control program of the Virginia Department of Highways summer 1973
    An evaluation of the erosion-siltation control program of the Virginia Department of Highways, summer 1973.
    Sherwood, W. Cullen ;
    Wyant, David C
    1974-01-01 | PDF
    During the summer of 1973 the authors conducted a statewide survey of the present state of the art of the Virginia Department of Highways' erosion and siltation control program. The survey included field observations of erosion and siltation control measures on many highway projects and interviews and discussions with over 50 field personnel active ...
  • An industrialized construction approach to concrete superstructures for bridges
    An industrialized construction approach to concrete superstructures for bridges.
    Brown, H. E
    1974-01-01 | PDF
    The objective of this study was to develop drawings for a specific site or sites that incorporated the best concepts of industrialized bridge superstructure construction, that is, great emphasis was placed upon the use of modular design and assembly line techniques in the prefabrication and assembly of the superstructure. The final design featured ...
  • Industrialized timber structures
    Industrialized timber structures.
    Brown, H. E
    1974-01-01 | PDF
    It was recently learned that a number of innovations in structural timber components are available to the construction industry, but that they were largely unknown to bridge designers. The purpose of this study was to develop for the Department a feasibility document that presented the latest technology in industrialized structural timber component ...
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