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Showing 35461 - 35480 of 36747 results
  • Sonic boom startle effects report of a field study
    Sonic boom startle effects : report of a field study.
    Thackray, Richard I. ;
    Rylander, Ragnar
    1973-07-01 | PDF
    The study reports the results of a sonic boom field study conducted in Sweden during October 1972. Ten female subjects were tested indoors on each of six days. Two age groups were studied: 20-35 and 50-65 years. Fighter aircraft flying at various heights over the test site produced booms with outdoor overpressures ranging from 60-640 N/sq.m. The nu ...
  • Assessment of Noise Environments Around Railroad Operations
    Assessment of Noise Environments Around Railroad Operations
    Swing, Jack W ;
    Pies, Donald B
    1973-07-01 | PDF
    The railroad industry has moved to supplement the current knowledge in the areas of prediction of noise emitted by railroad operations in anticipation of Federal and State regulations concerning the environment. This report is largely directed at satisfaction of the "noise elements" portion of the State of California Code Number 65302 and to provid ...
  • Major Interchange Design Operation and Traffic Control Vol 2 Appendixes A G
    Major Interchange Design, Operation, and Traffic Control: Vol. 2. Appendixes A - G
    Taylor, J.I.
    1973-07-01 | PDF
    The objectives of this research project were to develop improved design procedures and guidelines for major (i.e., freeway-to-freeway) interchanges through the examination and analysis of existing design procedures and current freeway operational characteristics. Pertinent information was gathered through a review of the literature, conversations w ...
  • Broadcast Tuesday June 19 1973
    Broadcast: Tuesday, June 19, 1973
    United States. Department of Transportation
    1973-06-19 | PDF
    President Nixon signed a law increasing funding for the development of airports in the United States and prohibiting head-taxes at most airports.
  • Project FARE Task III Report Urban Mass Transportation Industry Reporting System Design Interim Task III Report for November 1972June 1973 Period Part IV Commuter Rail Reporting
    Project FARE Task III Report: Urban Mass Transportation Industry Reporting System Design: Interim Task III Report for November 1972–June 1973 Period. Part IV – Commuter Rail Reporting
    Harvey, David L. ;
    Nagel, John W.
    1973-06-01 | PDF
    This report contains a description of the proposed uniform reporting system for the urban mass transit industry. It is presented in four volumes: Part I - Task Summary contains a description of how Task III was accomplished and the conclusions and recommendations reached at the end of the task. Part II - Reporting System Instructions contains gener ...
  • Analyses of Rail Vehicle Dynamics in Support of Development of the Wheel Rail Dynamics Research Facility Interim Report
    Analyses of Rail Vehicle Dynamics in Support of Development of the Wheel Rail Dynamics Research Facility: Interim Report
    Weinstock, Herbert.
    1973-06-01 | PDF
    The development of experimental facilities for rail vehicle testing at the DOT High Speed Ground Test Center is being complemented by analytical studies. The purpose of this effort has been to gain insight into the dynamics of rail vehicles to guide the equipment development and to establish an analytic framework for the design and interpretation o ...
  • Implementation of a Complex Design System
    Implementation of a Complex Design System
    Buttler, Larry J. ;
    Orellana, Hugo
    1973-06-01 | PDF
    This report discusses the procedure used to implement a new Flexible Pavement Design System into the Texas Highway Department pavement design operations. A step-by-step account is given of the work undertaken in implementation. This includes developing, trying, and revising the system. At the present stage design personnel from 10 of 26 Districts i ...
  • Height and weight errors in aeromedical certification data
    Height and weight errors in aeromedical certification data.
    Lategola, Michael T ;
    Lynn, Clyde A.
    1973-06-01 | PDF
    The Framingham Relative Weight Index (FRWI) of obesity was described in previous reports as a screening aid for detecting susceptibility to coronary heart disease (CHD). FRWI calculation requires measured values of height and weight but the height and weight values on standard airman medical applications are usually stated estimates of the examinee ...
  • Project FARE Task III Report Urban Mass Transportation Industry Reporting System Design Interim Task III Report for November 1972June 1973 Period Part III Reporting System Forms
    Project FARE Task III Report: Urban Mass Transportation Industry Reporting System Design: Interim Task III Report for November 1972–June 1973 Period. Part III – Reporting System Forms
    Harvey, David L. ;
    Nagel, John W.
    1973-06-01 | PDF
    The report contains a description of the proposed uniform reporting system for the urban mass transit industry. It is presented in four volumes: Part I - Task Summary contains a description of how Task III was accomplished and the conclusions and recommendations reached at the end of the task. Part II - Reporting System Instructions contains genera ...
  • Inflight performance of civilian pilots using movingaircraft and movinghorizon attitude indicators
    In-flight performance of civilian pilots using moving-aircraft and moving-horizon attitude indicators.
    Hasbrook, A. Howard ;
    Rasmussen, Paul G.
    1973-06-01 | PDF
    The in-flight performance of civilian instrument-rated pilots using two different types of attitude indicators in a general aviation aircraft was measured during typical instrument flying maneuvers. The instruments were an inside-out (moving-horizon) indicator and an outside-in (moving aircraft) indicator. The subjects were divided into low and hig ...
  • Project FARE Task III Report Urban Mass Transportation Industry Reporting System Design Interim Task III Report for November 1972June 1973 Period Part I Task Summary
    Project FARE Task III Report: Urban Mass Transportation Industry Reporting System Design: Interim Task III Report for November 1972–June 1973 Period. Part I – Task Summary
    Harvey, David L. ;
    Nagel, John W.
    1973-06-01 | PDF
    This report contains a description of the proposed uniform reporting system for the urban mass transit industry. It is presented in four volumes: Part I - Task Summary contains a description of how Task III was accomplished and the conclusions and recommendations reached at the end of the task. Part II - Reporting System Instructions contains gener ...
  • Project FARE Task III Report Urban Mass Transportation Industry Reporting System Design Interim Task III Report for November 1972June 1973 Period Part II Reporting System Instructions
    Project FARE Task III Report: Urban Mass Transportation Industry Reporting System Design: Interim Task III Report for November 1972–June 1973 Period. Part II – Reporting System Instructions
    Harvey, David L. ;
    Nagel, John W.
    1973-06-01 | PDF
    This report contains a description of the proposed uniform reporting system for the urban mass transit industry. It is presented in four volumes: Part I - Task Summary contains a description of how Task III was accomplished and the conclusions and recommendations reached at the end of the task. Part II - Reporting System Instructions contains gener ...
  • Automatic Detection of Urban Freeway Incidents
    Automatic Detection of Urban Freeway Incidents
    Nuckles, Nelson B. ;
    Dudek, Conrad L.
    1973-05-01 | PDF
    An automatic incident detection model using the standard normal deviate (SND) of the control variable (energy or lane occupancy) was proposed, developed, and evaluated. Two strategies were tested using a 3- and 5-minute data base for each control variable. The first strategy (A) required one SND value to be critical, whereas the second strategy (B) ...
  • Probabilistic Design Concepts Applied to Flexible Pavement System Design
    Probabilistic Design Concepts Applied to Flexible Pavement System Design
    Darter, Michael I. ;
    Hudson, W. Ronald
    1973-05-01 | PDF
    A major problem in pavement design has been the inherent uncertainty and variation of the design parameters and models. Empirical safety factors and judgement factors have been applied to "adjust" for the uncertainties involved, but the result has been much overdesign and under-design. A method was needed which would consider the variations and unc ...
  • Guidelines and Principles for Design of Rapid Transit Facilities
    Guidelines and Principles for Design of Rapid Transit Facilities
    Institute for Rapid Transit (U.S.)
    1973-05-01 | PDF
    These recommendations reflect accepted practice for design and construction of new rapid transit systems. The scope is limited to structures and fixed equipment applicable to structures, and emphasis is placed upon the environmental features which directly affect the safety and convenience of the transit patron. Topics covered include patron circul ...
  • Computer Control of the WaysideTelephone Arterial Street Network
    Computer Control of the Wayside-Telephone Arterial Street Network
    Messer, Carroll J. ;
    Gibbs, Jim L.
    1973-04-01 | PDF
    The digital computer control of a small network of traffic signals near the Gulf Freeway is described. The design and development of the traffic control system theory, software, and hardware are presented. Three types of traffic control strategies were implemented and evaluated. These were existing pretimed, progressive pretimed, and progressive tr ...
  • A Preliminary Evaluation of the Temporal Stability of Trip Generation Rates
    A Preliminary Evaluation of the Temporal Stability of Trip Generation Rates
    Christiansen, Dennis L. ;
    Stover, Vergil G.
    1973-04-01 | PDF
    This report presents a preliminary study of changes over time in internal person trips per person and internal auto-driver trips per person for urban areas within Texas. Trip generation rates apparently have been increasing as a result of a greater propensity to travel and changes in socioeconomic characteristics. The rate of increase varies among ...
  • Frequency of anticollision observing responses by solo pilots as a function of traffic density ATC traffic warnings and competing behavior
    Frequency of anti-collision observing responses by solo pilots as a function of traffic density, ATC traffic warnings, and competing behavior.
    Lewis, Mark F.
    1973-04-01 | PDF
    Eighteen instrument-rated pilots were flown in two-hour simulated solo missions during which the frequency of traffic, ATC warnings, and ATC clearances were varied, while the visibility of the target was held constant at 100%.In order to observe the target, the pilot was required to make a simple, overt observing response; i.e., the pilot has to pr ...
  • Prevalence and incidence of disease among airmen medically certified during 1965
    Prevalence and incidence of disease among airmen medically certified during 1965.
    Booze, Charles F.
    1973-04-01 | PDF
    The historical prospective study follows some 306,000 airmen medically certified during 1965 through December 1969 to observe prevalence and incidence of disease among these airmen. It also considers possible contribution of medical factors to attrition of airmen from an active status as a follow-up to a previous FAA study concerning characteristic ...
  • Torsional Stresses in Prestressed Concrete Bridge Beams
    Torsional Stresses in Prestressed Concrete Bridge Beams
    Buth, Eugene C.
    1973-04-01 | PDF
    The behavior of the Texas Highway Department 54-in. prestressed concrete bridge beam under combined torsional and transverse loads was studied. Elastic theory and maximum tensile stress failure criterion were used to develop a theoretical failure envelope. Deflection, rotation and strain measurements were made on edge beams in two structures during ...
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