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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 34361 - 34380 of 35438 results
  • Control strip study interim report
    Control strip study : interim report.
    Shah, S. C. ;
    Melancon, J. L.
    1972-01-01 | PDF
    This report is concerned with the application of the "control strip" technique using nuclear devices for compaction control of certain base courses and asphaltic concrete surface course. The technique, as evaluated here, consisted of applying increasing compactive effort to a small section (300 feet) of the material type to establish the optimum ro ...
  • Collapsible soils in Louisiana
    Collapsible soils in Louisiana.
    Arman, Ara ;
    Thornton, Samuel I.
    1972-01-01 | PDF
    In southwest Louisiana, some surface silts (up to 3 feet deep) collapse under load after moisture is added. These soils were indistinguishable from nearby normal silts through routine tests. The deposits occur as low, gently-sloping ridges. Very similar collapsible soils were found in the well-known pimple mounds of the area. In the stable silts, v ...
  • The stripping of penetration 85100 asphalt from silicate aggregate rocks a laboratory study
    The stripping of penetration 85-100 asphalt from silicate aggregate rocks : a laboratory study.
    Walker, Hollis N
    1972-01-01 | PDF
    In Virginia stripping has occurred when certain of the acidic silicate rocks have been used as aggregate in bituminous paving. The purpose of this project was to discover which kinds of silicate aggregate would be most apt to remain well bonded in bituminous mixes and which would be more apt to have a poor bond and become stripped from their binder ...
  • A survey of waterproofing membrane systems for bridge decks
    A survey of waterproofing membrane systems for bridge decks.
    McKeel, Wallace T
    1972-01-01 | PDF
    This survey was concerned with only a few of the many waterproof systems available for sealing concrete bridge decks, and made use of personal contacts with engineers of other highway agencies. The information gathered indicated that there were several systems that warranted testing in Virginia. Evaluations of the effectiveness of the membrane syst ...
  • A comparison of blood alcohol levels as determined by breath and blood tests taken in actual field operations
    A comparison of blood alcohol levels as determined by breath and blood tests taken in actual field operations.
    Smith, Thomas J
    1972-01-01 | PDF
    During its 1972 session, the General Assembly of Virginia enacted Senate Bill 104, which authorizes the breath test, as well as the blood test used previously, as a proper chemical test to determine the alcoholic content of the blood. Any person arrested in Virginia after January 1, 1973 for suspicion of driving while intoxicated may elect to have ...
  • Void parameters of 24 cores of concrete removed from a consolidation test study section of I64
    Void parameters of 24 cores of concrete removed from a consolidation test study section of I-64.
    Walker, Hollis N
    1972-01-01 | PDF
    During the construction of I-64 near Charlottesville, Virginia, the Ballenger Paving Company chose to set up a limited experiment to investigate various factors affecting the consolidation of concrete by vibration. The test design varied the speed of the paver and used vibrations at several frequencies. Speeds of 3, 4, 25, 5.5, 11, 12, and 14 feet ...
  • Systematizing pavement surface information for the highways of Virginia
    Systematizing pavement surface information for the highways of Virginia.
    Creech, Marion F
    1972-01-01 | PDF
    Pavement information consisting of type of pavement, date of construction, methods used in construction, and types and sources of materials have been recorded in Virginia since the 1930's. Because there has been no effective system for filing the information and no one has been assigned the overall responsibility for supervising the collection, sto ...
  • Evaluation of traffic marking beads and paint
    Evaluation of traffic marking beads and paint.
    Shepard, Frank D
    1972-01-01 | PDF
    Traffic markings that retain high reflective properties under adverse lighting and weather conditions are clearly of utmost importance in traffic safety. It was the intent of this study to investigate optimum traffic striping procedures and materials by evaluating such variables as: (1) Certain characteristics of glass beads, namely their gradation ...
  • Installation report thick lift bituminous base construction and materials phase
    Installation report : thick lift bituminous base : construction and materials phase.
    Hughes, Charles S ;
    Maupin, G. W
    1972-01-01 | PDF
    During the 1970 construction season, the Basic Construction Company of Newport News, laid a 9-inch bituminous concrete base course in a single lift directly on an unimproved subgrade on a section of Route 31 just southwest of Williamsburg, as specified by the Virginia Department of Highways. This construction technique, which had been used in many ...
  • Roadmeter roughness testing in Virginia
    Roadmeter roughness testing in Virginia.
    McGhee, Kenneth H ;
    Gunn, R. W
    1972-01-01 | PDF
    A passenger car mounted PCA roadmeter has been correlated with the BPR roughometer used for road roughness testing in Virginia for many years. The results showed a good correlation and that the roadmeter is capable of excellent reproducibility. Roadmeter (Rm) and roughometer (R) roughness are related by the equation R=1.14Rm+25. A temperature corre ...
  • Performance studies of continuously reinforced concrete pavement pavements without transverse steel
    Performance studies of continuously reinforced concrete pavement : pavements without transverse steel.
    McGhee, Kenneth H
    1972-01-01 | PDF
    The status of studies of the three continuously reinforced pavement projects near Charlottesville is reported. Of particular interest in these studies are the effects of the elimination of transverse reinforcing steel, the changing characteristics of shrinkage cracking with age, and the end movements of anchor sections. While the studies are somewh ...
  • An analytic survey of signing inventory procedures in Virginia
    An analytic survey of signing inventory procedures in Virginia.
    Hanscom, Fred R
    1972-01-01 | PDF
    An analytic survey was made of the highway signing and sign-maintenance inventory systems in each of the districts of the Virginia Department of Highways. Of particular concern in reviewing the procedures was the format of the inventory forms, the applications of inventory information, the time and effort required to maintain the inventory, the ref ...
  • A study of the review and comment phase of the environmental impact statement draft and negative
    A study of the review and comment phase of the environmental impact statement : draft and negative.
    Wade, John ;
    Perfater, Michael A
    1972-01-01 | PDF
    This study examined the agencies that review the environmental impact statements (EIS) prepared on highway projects and was an attempt to shed light on the functions, personnel, and problems of the offices that saw the statements. The report covered all major federal and state agencies to which the EIS draft was distributed. The report has three pa ...
  • A field evaluation of Transflex bridge joint performance
    A field evaluation of Transflex bridge joint performance.
    Hilton, Marvin H
    1972-01-01 | PDF
    Presented are the results of a field evaluation of the various types of the General Tire Transflex joint known to be in use in Virginia. An effort was made, whenever possible, to qualitatively evaluate the joints with respect to their (1) watertightness, (2) ability to reject debris, (3) stability and noise producing characteristics under traffic i ...
  • Estimation of 18kip equivalent on primary and interstate road systems in Virginia
    Estimation of 18-kip equivalent on primary and interstate road systems in Virginia.
    Vaswani, N. K ;
    Thacker, D. E
    1972-01-01 | PDF
    For pavement design purposes, the Virginia Department of Highways uses the AASHO method of determining the 18-kip equivalent single axle load (EWL-18). The evaluation of the EWL-18 is based on on-location truck axle weight studies that usually are carried on for one day only. This method is expensive and time consuming. Because of the expense and t ...
  • Recommended design method for flexible pavements in Virginia
    Recommended design method for flexible pavements in Virginia.
    Vaswani, N. K
    1972-01-01 | PDF
    No Description
  • An investigation of the effects of elevated mixing temperatures on the properties of asphalt cement
    An investigation of the effects of elevated mixing temperatures on the properties of asphalt cement.
    Aderhold, J. Wayne
    1972-01-01 | PDF
    This laboratory investigation was instituted to determine the feasibility of increasing the design mixing temperature for hot-mix asphaltic concrete. Based on data obtained from modified thin film oven tests, it appears that the upper design limit could be increased to 300°F without appreciably affecting the durability of the asphalts studied. The ...
  • Virginias use of remote sensing in the preliminary aerial surveyhighway planning stage
    Virginia's use of remote sensing in the preliminary aerial survey--highway planning stage.
    Noble, David F
    1972-01-01 | PDF
    The purpose of the study was to determine whether infrared technology could be used in Virginia to delineate areas with soils having a high moisture content. The study was conducted in cooperation with the FHWA, and personnel of the University of Michigan were engaged as consultants for the remote sensing flights. Located in Augusta County, Virgini ...
  • Design criteria for sediment basins
    Design criteria for sediment basins.
    Sherwood, W. Cullen
    1972-01-01 | PDF
    The need for controlling construction induced sediment to keep it from entering the nation's waterways is generally accepted. Efficient means and methods for sediment control, however, are not simple, and in some cases have not been developed to a high degree. A look at the overall picture of sediment control shows two distinct approaches: (1) Cont ...
  • A recommendation to the Virginia Department of Highways concerning the use of studded tires in Virginia
    A recommendation to the Virginia Department of Highways concerning the use of studded tires in Virginia.
    Mahone, David C
    1972-01-01 | PDF
    No Description
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