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Showing 35721 - 35740 of 36747 results
  • Tensile Behavior of Subbase Materials Under Repetitive Loading
    Tensile Behavior of Subbase Materials Under Repetitive Loading
    Moore, Raymond K. ;
    Kennedy, Thomas W.
    1971-10-01 | PDF
    Results of a study of the fatigue characteristics of asphalt-treated, cement-treated, and lime-treated subbase materials indicated that the indirect tensile test can be used satisfactorily to evaluate the fatigue properties of treated materials under repeated tensile stresses. In addition, the general nature of the relationship between applied tens ...
  • Interim Report of Research on FullScale Prestressed Panel Type Bridge
    Interim Report of Research on Full-Scale Prestressed Panel Type Bridge
    Buth, Eugene C. ;
    Furr, Howard L.
    1971-10-01 | PDF
    One span of a full-scale highway bridge was constructed and subjected to cyclic axle loads at three load positions. The bridge was constructed with four Texas Highway Department Type B prestressed beams, prestressed panels for the lower portion of the deck, and cast-in-place concrete which bonded the prestressed elements together and formed the upp ...
  • Alcohol and disorientationrelated responses V The influence of alcohol on positional rotatory and coriolis vestibular responses over 32hour periods
    Alcohol and disorientation-related responses. V, The influence of alcohol on positional, rotatory, and coriolis vestibular responses over 32-hour periods.
    Hill, Ronald J. ;
    Collins, William E.
    1971-10-01 | PDF
    There are some indications that the systems most closely associated with disorientation responses--the visual and vestibular systems--may continue to show effects of alcohol ingestion for periods in excess of 24 hours. These effects may be evident both in static vestibular reactions and in dynamic reactions such as those which produce Coriolis vest ...
  • Motor Carrier Transportation of Agricultural Products in North Dakota 1969
    Motor Carrier Transportation of Agricultural Products in North Dakota 1969
    Nichols, Ronald Q ;
    Nelson, David C
    1971-10-01 | PDF
    The general purpose of this study is to estimate the volume of agricultural products transported by motor carrier to, from, and within North Dakota. The specific objectives are: 1. To determine the volume of agricultural products transported by motor carrier out of, into, and within North Dakota by type of commodity, by origin, and by destination. ...
  • Motor Carrier Transportation of NonAgricultural Products in North Dakota 1969
    Motor Carrier Transportation of Non-Agricultural Products in North Dakota 1969
    Binkley, Gregory R ;
    Nelson, David C
    1971-10-01 | PDF
    The primary purpose of this study is to estimate the volume of nonagricultural commodities transported by motor carrier to, from, and within North Dakota. The specific objectives are: 1) to determine the total volume of nonagricultural products transported by motor carrier to, from, and within North Dakota, and to determine the volume of the respec ...
  • Measurement of Vehicle Contamination by Exhaust Gases 1971
    Measurement of Vehicle Contamination by Exhaust Gases [1971]
    Mathews, Steven M.
    1971-10-01 | PDF
    An investigation of the concentration of carbon monoxide (CO) within the passenger compartment of motor vehicles has been made. A sample handling system has been developed to measure the concentrations of CO at as many as six locations inside and outside of a motor vehicle. To use this system effectively, a test procedure was developed with sixteen ...
  • Convention for the Suppression of Unlawful Acts Against the Safety of Civil Aviation
    Convention for the Suppression of Unlawful Acts Against the Safety of Civil Aviation
    International Conference on Air Law (1971 : Montreal, Canada)
    1971-09-23 | PDF
    The Montreal Convention defines a wide spectrum of unlawful acts against the safety of civil aviation and the Contracting States have undertaken to make these offences punishable by severe penalties. The Convention contains detailed provisions on jurisdiction, custody, prosecution and extradition of the alleged offender. The Montreal Convention doe ...
    Supporting Files
  • AASHO correlation study final report
    AASHO correlation study : final report.
    Shah, S. C. ;
    Law, Sheldon M.
    1971-09-01 | PDF
    The application of the design concepts developed at the AASHO road test to Louisiana in-service pavements are presented. In order to correlate the level of performance determined at the road test with that of Louisiana pavements, present serviceability index (psi) determinations were made on 137 flexible sections and 51 rigid sections. Sixty-one of ...
  • Operating Manual for the Texas Trip Distribution Package
    Operating Manual for the Texas Trip Distribution Package
    Benson, J. D. ;
    Bell, Charles E.
    1971-09-01 | PDF
    The Texas Trip Distribution Package is a collection of computer programs designed to perform trip distributions featuring the application of a constrained interactance model. Other programs, available in the package, provide full support. This manual describes the performance capabilities, execution procedures data specifications, and computational ...
  • Design Charts for Minor Service Structure Foundations
    Design Charts for Minor Service Structure Foundations
    Lytton, Robert L.
    1971-09-01 | PDF
    This report presents a series of design charts which allow an entirely graphical procedure to be followed in selecting the proper size of drilled shaft foundation for standard Texas Highway Department signs. The procedure uses a boring log of Texas Highway Department cone penetrometer measurements and a graphical overlay-slide device which was deve ...
  • Evaluation of Pressure Cells Used for Field Measurements of Lateral Earth Pressures on Retaining Walls
    Evaluation of Pressure Cells Used for Field Measurements of Lateral Earth Pressures on Retaining Walls
    Corbett, David A. ;
    Coyle, Harry M.
    1971-09-01 | PDF
    Commercially available total earth pressure cells and gaging systems are investigated. The principles of operation for nine commercially available pressure cells are presented, and the manufacturers performance ratings are summarized. The performance characteristics of four types of pressure cells selected for this preliminary study are determined ...
  • Traffic Projection and Assignment
    Traffic Projection and Assignment
    Stover, Vergil G. ;
    Benson, J. D.
    1971-09-01 | PDF
    Two traffic assignment packages were developed for use on the Texas Highway Department's IBM 360/50 Computer System. The Texas Small Network Package, which will accommodate small networks of up to 4,000 nodes, implements a new algorithm which allows the trees to be built and the network simultaneously loaded. The Texas Large Network Package, which ...
  • Field Test Plan for Evaluating the Cooperative Breath Analyzer
    Field Test Plan for Evaluating the Cooperative Breath Analyzer
    Oates, John Francis ;
    Jacobs, Harold H.
    1971-09-01 | PDF
    This report provides basic inputs to the Transportation Systems Center for their continuing development and evaluation of cooperative breath analyzers. Its primary purpose is to indicate a number of potential field test sites and to describe various available testing modalities.
  • Marine Weather Dissemination Systems Study Volume III Systems Effectiveness Measurements
    Marine Weather Dissemination Systems Study: Volume III - Systems Effectiveness Measurements
    Crowe, B.J. ;
    Holliman, E.
    1971-08-16 | PDF
    Systems effectiveness of marine weather dissemination systems is measured against carefully established criteria. First level effectiveness, accessibility, is measured in terms of coverage, audience, and system schedule. Second level effectiveness is examined in terms of timeliness. The analysis addresses systems operated by the U.S. Coast Guard, t ...
  • Marine Weather Dissemination Systems Study Volume V Guidelines for Future Coast Guard Research and Development
    Marine Weather Dissemination Systems Study: Volume V - Guidelines for Future Coast Guard Research and Development
    Crowe, B.J. ;
    Holliman, E.
    1971-08-16 | PDF
    Systems objectives for advanced alerting and dissemination systems for recreational boatmen are established. Parametric data are presented as a baseline for future initial design efforts on systems to disseminate weather and environmental information to marine users and to alert them to impending hazardous conditions. Areas are identified in which ...
  • Marine Weather Dissemination Systems Study Volume I Executive Summary
    Marine Weather Dissemination Systems Study: Volume I - Executive Summary
    Crowe, B.J.
    1971-08-16 | PDF
    Work performed during a study of Marine Weather Dissemination Systems is summarized. The study examined existing and planned systems for disseminating weather and other environmental information to marine users, and made objective, comparative measurements of the effectiveness of each of the systems. Based on these analyses, recommendations were ma ...
  • Marine Weather Dissemination Systems Study Volume IV Recommendations for Change
    Marine Weather Dissemination Systems Study: Volume IV - Recommendations for Change
    Crowe, B.J. ;
    Holliman, E.
    1971-08-16 | PDF
    Potential improvements in existing and proposed weather dissemination systems are examined. Recommendations are made for changes in the policies, facilities and procedures of the U.S. Coast Guard and other government and non- government agencies aimed at effecting realistic improvements in system service. Service to coastal, off-shore and high seas ...
  • Marine Weather Dissemination Systems Study Volume II Systems Characterization
    Marine Weather Dissemination Systems Study: Volume II - Systems Characterization
    Crowe, B.J. ;
    Holliman, E.
    1971-08-16 | PDF
    Systems for disseminating weather information to marine users are described in detail. Coast Guard and National Weather Service transmitting facilities are listed, giving location, name, call sign, transmitting power, mode and frequency, and antenna height. Coastal display stations and telephone facilities are also listed. Facilities serving off-sh ...
  • Application of Closed Circuit Television for Traffic Surveillance in Texas
    Application of Closed Circuit Television for Traffic Surveillance in Texas
    McCasland, William R. ;
    Biggs, Raymond G.
    1971-08-01 | PDF
    Closed circuit television (CCTV) has been used for surveillance of traffic and transportation facilities for many years. However, the number of operating systems is few because their effectiveness as a long-term surveillance system has been suspect due to the inclusion of human observers in the surveillance loop. The use of CCTV for short intensive ...
  • A Determination Framework for Wet Weather Speed Limits
    A Determination Framework for Wet Weather Speed Limits
    Glennon, John C.
    1971-08-01 | PDF
    This report develops determination charts for wet weather speed limits. These charts are based on a composite of frictional requirements for passing, emergency stopping, and emergency path-correction maneuvers. Determination charts for highway curves are also presented.
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