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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 34161 - 34180 of 35412 results
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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) ...
  • 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 ...
  • The Relationships of Age and ATC Experience to Job Performance Ratings of Terminal Area Traffic Controllers
    The Relationships of Age and ATC Experience to Job Performance Ratings of Terminal Area Traffic Controllers
    Cobb, Bart B. ;
    Nelson, Peter L.
    1973-04-01 | PDF
    The present report concerns an investigation wherein procedures, somewhat similar to those used in the 1965 study of journeymen ARTCC (or Center) controllers, were employed to determine the interrelationships of age, FAA ATC experience, and ratings of job performance for journeymen ATCSs engaged in Terminal Area Traffic Control at several high-traf ...
  • 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 ...
  • Pendulum Tests on Transformer Bases for Luminaire Supports
    Pendulum Tests on Transformer Bases for Luminaire Supports
    Buth, Eugene C. ;
    Hirsch, T. J.
    1973-04-01 | PDF
    Energy absorbing characteristics of four cast aluminum transformer bases for luminaire supports were determined using a 2000 lb. pendulum. Complete luminaire supports including the base, pole, mast arm, and simulated luminaire were tested. Velocity of the pendulum at impact was 20 mph. Highspeed photography was used as the primary source of data ac ...
  • 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 ...
  • 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 ...
  • Variation in temperature and mechanical properties of asphaltic concrete due to storage in surge bins
    Variation in temperature and mechanical properties of asphaltic concrete due to storage in surge bins.
    Hearld, John L. ;
    Lay, Larkin D.
    1973-03-01 | PDF
    The Louisiana Department of Highways specifications on asphaltic concrete allow the contractors to use silos or surge bins for storage of asphaltic concrete mixtures. However, the maximum allowable storage time of the hot mix, if the contractor elects to use such a facility, is set up arbitrarily. The present allowable time for heated silos is esta ...
  • The aircraft as an instrument of self destruction
    The aircraft as an instrument of self destruction.
    Yanowitch, Robert E. ;
    Bergin, Jack M.
    1973-03-01 | PDF
    Often the relationship between the pilot and his aircraft is such that the aircraft may be thought of as an extension of the pilot himself during the act of flight. If this pilot accumulates stress in his life with which he can no longer adequately cope, he may engage in self-destructive acts, some of these within the context of his flying activiti ...
  • The Optimization of a Flexible Pavement System Using Linear Elasticity
    The Optimization of a Flexible Pavement System Using Linear Elasticity
    Lu, Danny Y. ;
    Shih, Chia Shun
    1973-03-01 | PDF
    This report integrates linear elastic theory into the current version of the Texas Flexible Pavement Design System in order to give an objective analysis base for the structure feasibility determination based on the internal stresses and surface deflections caused by a dual-wheel load of 9,000-lb. Included in the report are: 1. Layered Pavement Str ...
  • Transit in the US and Texas Past Present and Future
    Transit in the U.S. and Texas: Past, Present, and Future
    Holder, Ronald W.
    1973-03-01 | PDF
    This report presents the results of a study of transit systems in the U. S. and Texas. Historical data are analyzed to identify the factors contributing to the decline of transit. The role of transit today is contrasted to its role of fifty years ago. Present and future needs for transit in Texas are identified. Characteristics of rail-rapid-transi ...
  • Development of Guidelines for the Design of Subsurface Drainage Systems for Highway Pavement Structural Sections
    Development of Guidelines for the Design of Subsurface Drainage Systems for Highway Pavement Structural Sections
    Cedergren, Harry R. ;
    Arman, Jorge A.
    1973-02-01 | PDF
    The report presents results of interviews with State highway department personnel, field reconnaissance of pavements in 9 States and 9 case studies of selected pavements in the FHWA Regions. Problems with existing drainage design concepts and construction methods are pointed out, showing why many pavements are saturated with water for long periods ...
  • Subtle changes in brain functions produced by single doses of mevinphos Phosdrin
    Subtle changes in brain functions produced by single doses of mevinphos (Phosdrin).
    Revzin, Alvin M.
    1973-02-01 | PDF
    Mevinphos (Phosdrin) was found to inhibit the amplitude of hippocampal evoked potentials in unanesthetized squirrel monkeys with chronically indwelling electrodes. The threshold dose was 0.050 mg/kg and the maximal dose studied was 0.200 mg/kg. Doses above 0.200 mg/kg induced hippocampal seizures.Within the dose range of 0.050 mg/kg to 0.200 mg/kg ...
  • Transient blindness due to the combined effects of mevinphos and atropine
    Transient blindness due to the combined effects of mevinphos and atropine.
    Revzin, Alvin M.
    1973-02-01 | PDF
    Three squirrel monkeys did not respond to visual stimuli for at least one hour following combined administration of mevinphos (Phosdrin) and atropine. Therefore, aerial applicator personnel being treated for mevinphos (Phosdrin) poisoning with atropine may show potentially hazardous dysfunctions of visual perception. Some mechanisms for this effect ...
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