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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 33861 - 33880 of 35412 results
  • Evaluation of synthetic fabrics for the reduction of reflective cracking final report
    Evaluation of synthetic fabrics for the reduction of reflective cracking : final report.
    Carey, Donald E.
    1975-04-01 | PDF
    This research was undertaken to evaluate the effectiveness of two synthetic fabrics in relieving stress and reducing or eliminating reflection cracking in the asphaltic concrete overlay of existing distressed concrete pavements.The polypropylene fabric was placed in strips over the cracks and joints of an existing concrete pavement, followed by a 3 ...
  • Highway Metrication Vol 1 Tasks 1 2 3 4 and Apercu
    Highway Metrication: Vol. 1. Tasks 1, 2, 3, 4 and Apercu
    Meacham, D. G. ;
    Bishara, A.G.
    1975-04-01 | PDF
    The purpose of the study is to identify various problems which are likely to arise during highway metrication and to prepare a detailed plan for research aimed at solving conversion problems. Investigations reveal a need for an early selection of the metric units to be used, the vital importance of early metrication of specifications and standards, ...
  • Highway Metrication Vol 2 Appendixes
    Highway Metrication: Vol. 2. Appendixes
    Meacham, D. G. ;
    Bishara, A.G.
    1975-04-01 | PDF
    The study purpose is to identify various problems which are likely to arise during highway metrication and to prepare a detailed plan for research aimed at solving conversion problems. Investigations reveal a need for an early selection of the metric units to be used, the vital importance of early metrication of specifications and standards, and th ...
  • Dynamic Vehicular Loading of the Hubbard Creek Reservoir Bridge 1975
    Dynamic Vehicular Loading of the Hubbard Creek Reservoir Bridge, 1975
    Lee, Clyde E. ;
    Machemehl, Randy
    1975-04-01 | PDF
    Since its construction in the early 1960's, the three-quarter-mile-long predominantly reinforced concrete bridge structure on U.S. Highway 180 over the Hubbard Creek Reservoir in north central Texas has developed significant permanent deformation or sag near the center of most of the 40-foot-long simply supported pan girder type spans. This undulat ...
  • Analysis of Elkhart Yard Track and Hump Requirements
    Analysis of Elkhart Yard Track and Hump Requirements
    Hackworth, Mary Ann
    1975-03-15 | PDF
    The Elkhart yard was analyzed using the CAPACITY model. Two types of sensitivity analysis were conducted: First, the effect of slower humping rates was analyzed to simulate the effects of severe weather conditions. Second, the effect on track requirements of a +/-1 hour variation in arrival/departure time was analyzed.
  • Rapid setting concrete patching study final report
    Rapid setting concrete patching study : final report.
    Ross, Joseph E.
    1975-03-01 | PDF
    This investigation was prompted by the increasing number of concrete roadway failures which have required corrective action. A more permanent solution than the placing of hot or cold mixed asphalt compounds into concrete voids was deemed necessary. the research included as many generic types of concrete patching materials as was possible under the ...
  • A discussion of horizontal wind vector determinations in south Louisiana a meteorological monitoring study final report
    A discussion of horizontal wind vector determinations in south Louisiana : a meteorological monitoring study : final report.
    Cramer, George H. ;
    Griffin, Paul M.
    1975-03-01 | PDF
    The impact of air pollution caused by traffic has become a major environmental consideration in developing new and improved highway facilities. The acquisition of meaningful meteorological data which are applicable to individual highway projects is essential to effective air quality analyses. These data are used as inputs to air pollution dispersio ...
  • An evaluation of the effects of tread depth pavement texture and water film thickness on skid numberspeed gradients supplement
    An evaluation of the effects of tread depth, pavement texture, and water film thickness on skid number-speed gradients : supplement.
    Mahone, David C
    1975-03-01 | PDF
    The raw data and the initial curves for the study entitled, "An Evaluation of the Effects of Tread Depth, Pavement Texture, and Water Film Thickness on Skid Number-Speed Gradients" are so voluminous that they are included in the Supplement rather than in the final report of this study. For economy and convenience, they have been copied from the com ...
  • Anthropometry of airline stewardesses
    Anthropometry of airline stewardesses.
    Snow, Clyde C. ;
    Reynolds, Herbert M.
    1975-03-01 | PDF
    The report presents the body measurements of 423 stewardess trainees enrolled in the American Airlines Stewardess Training Academy in Fort Worth, Texas, between February and June 1971. It includes the means, standard deviations, coefficients of variation, percentiles, and related statistics of 72 standard anthropometric and functional measurements. ...
  • Bridge deck deterioration study final report
    Bridge deck deterioration study : final report.
    Ross, Joseph E.
    1975-03-01 | PDF
    The basic purpose of this study was to investigate three bridges in the northern section of Louisiana in an attempt to determine if there is sufficient deterioration and corrosion of the reinforcing steel to warrant a comprehensive study of bridge decks in this area of the state which is exposed to icing conditions during the winter months.
  • Transit Fact Book 19741975 Edition
    Transit Fact Book: 1974-1975 Edition
    American Public Transit Association
    1975-03-01 | PDF
    The 1974-1975 edition of the Transit Fact Book is the first annual edition compiled by the Statistical Department of the American Public Transit Association (APTA); the 1974-1975 edition is also the thirty-second annual edition of this publication issued under the same title by the American Transit Association (ATA) for 31 years. Identified as the ...
  • Annual Report of the Maritime Administration 1974 MARAD 1974
    Annual Report of the Maritime Administration 1974 [MARAD 1974]
    United States. Maritime Administration
    1975-03-01 | Annual Reports of the Maritime Administration | PDF
    Maritime Administration's report of its activities during fiscal year 1974. Guided by the innovative programs of the Merchant Marine Act of 1970, the Maritime Administration and the maritime industry made substantial progress during the year. This report reveals that the American shipbuilding and shipping industries are effectively responding to th ...
  • Computer Simulation of Tank Car Head Puncture Mechanisms
    Computer Simulation of Tank Car Head Puncture Mechanisms
    Diboll, W. B. ;
    Yin, S. K.
    1975-02-01 | PDF
    A number of railroad accidents have been aggravated by couplers puncturing the shell head of hazardous material tank cars. Development of means for identifying possible puncture mechanisms and quantifying the coupler forces involved is the subject of this report. A mathematical model, capable of simulating train action in the vertical plane, has be ...
  • Evaluation of continuously reinforced concrete pavement final report
    Evaluation of continuously reinforced concrete pavement : final report.
    Bolourchi, Zahir ;
    Temple, William H.
    1975-02-01 | PDF
    This report provides a review of the performance and structural characteristic exhibited on five continuously reinforced concrete pavement projects in the State of Louisiana. The performance characteristics were evaluated by means of the Mays Ride Meter. The structural characteristics were determined by means of the Dynamic Deflection determination ...
  • Evaluation of full depth asphaltic concrete pavements interim report
    Evaluation of full depth asphaltic concrete pavements : interim report.
    Bolourchi, Zahir ;
    Temple, William H.
    1975-02-01 | PDF
    This report provides a review of the performance and structural characteristics exhibited on two full depth asphaltic concrete pavement projects constructed on the Louisiana interstate system.The roughness characteristics of both full depth projects were evaluated by means of the Mays Ride Meter. Roughness values ranged from 40 to 80 inches per mil ...
  • Evaluation of the First Generation UTCSBPS Control Strategy Volume 2 Technical Appendices
    Evaluation of the First Generation UTCS/BPS Control Strategy - Volume 2 - Technical Appendices
    Kay, J. L. ;
    Allen, J. C.
    1975-02-01 | PDF
    This report presents the results of the evaluation of the alternatives of the first-generation traffic control strategy for the computerized Urban Traffic Control System and Bus Priority System in Washington, D. C. Five traffic control alternatives were evaluated to assess their relative impact on traffic during typical weekday morning, midday, and ...
  • Evaluation of the First Generation UTCSBPS Control Strategy Volume 1 Technical Report
    Evaluation of the First Generation UTCS/BPS Control Strategy - Volume 1 - Technical Report
    Kay, J. L. ;
    Allen, J. C.
    1975-02-01 | PDF
    This report presents the results of the evaluation of the alternatives of the first-generation traffic control strategy for the computerized Urban Traffic Control System and Bus Priority System in Washington, D. C. Five traffic control alternatives were evaluated to assess their relative impact on traffic during typical weekday morning, midday, and ...
  • Influence of Cognitive Style in a Methodology for Data Base Design
    Influence of Cognitive Style in a Methodology for Data Base Design
    Bush, Ronald R.
    1975-02-01 | PDF
    The rapid proliferation of computerized information systems has created an urgent need for better methods to determine what the contents of the data bases for these systems should be. The central theme underlying the methodology, which is proposed for making this determination, is that there are certain types of information concerning what the cont ...
  • Evaluation of Roadway Safety Features by Computer Simulation A Final Report
    Evaluation of Roadway Safety Features by Computer Simulation: A Final Report
    Ross Jr., Hayes E.
    1975-02-01 | PDF
    Research on evaluation of the roadway environment by dynamic analysis of the interaction between the vehicle, passenger, and the roadway began in 1968 and was concluded in 1974. The broad objective of the research was to develop criteria beneficial to the design of a safe highway and its roadside features. Math models and limited full-scale tests w ...
  • Rainfall and Visibility the View from Behind the Wheel
    Rainfall and Visibility – the View from Behind the Wheel
    Ivey, Don L. ;
    Lehtipuu, Eero K.
    1975-02-01 | PDF
    The factors influencing wet weather accidents are complex, a fact readily ignored by many who would blame tire pavement friction for all our wet weather problems. A factor of significance is visibility, as influenced not only by rainfall intensity but to a great extent by traffic speed. This interim report presents a limited number of direct visibi ...
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