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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 34601 - 34620 of 35440 results
  • Statistical and Economic Aspects of RailHighway Grade Crossing Safety Improvement Programs in Texas
    Statistical and Economic Aspects of Rail-Highway Grade Crossing Safety Improvement Programs in Texas
    Richards, Hoy A. ;
    Lamkin, Jack T.
    1970-11-01 | PDF
    Texas has approximately 14,000 sites at which railroads intersect public roads and streets. Among these some 800 rail-highway grade crossing accidents occur annually. The accidents result in approximately 100 deaths and 300 injuries to motorists on Texas public roads each year. In order to reduce the number of accidents that occur at rail-highway i ...
  • Effective approaches to disorientation familiarization for aviation personnel
    Effective approaches to disorientation familiarization for aviation personnel.
    Collins, William E.
    1970-11-01 | PDF
    Techniques are discussed for providing familiarization of aviation personnel with disorientation problems. The procedures are spelled out in detail. Methods of modifying existing equipment as well as an evaluation of available commercial equipment are presented. The techniques have been used with notable success both at the Civil Aeromedical Instit ...
  • Maximum speed limits Volume 4 An implementation method for setting a speed limit based on the 85th percentile speed
    Maximum speed limits. Volume 4, An implementation method for setting a speed limit based on the 85th percentile speed
    Elston, Patricia A.
    1970-10-01 | PDF
    This volume contains an explanation of a method for setting a speed limit which was developed as a part of the project conducted by the Institute for Research in Public Safety under Contract No. FH-11-7275, "A Study for the Selection of Maximum Speed Limits."
  • Maximum speed limits Volume 2 The development of speed limits a review of the literature
    Maximum speed limits. Volume 2, The development of speed limits : a review of the literature
    Elston, Patricia A.
    1970-10-01 | PDF
    This report contains the literature review conducted as a part of the project "A Study for the Selection of Maximum Speed Limits." Five aspects of speed and speed control are discussed. These topics include: the history of speed limits; the relationship of speed and speed limits; driver speed behavior and variables, other than speed limits, which i ...
  • Maximum speed limits Volume 3 A programmed implementation manual for setting a speed limit based on the 85th percentile
    Maximum speed limits. Volume 3, A programmed implementation manual for setting a speed limit based on the 85th percentile
    Elston, Patricia A.
    1970-10-01 | PDF
    This report contains the implementation manual developed as a part of the project "Maximum Speed Limits." The manual consists of a programed educational unit and a field workguide concerning the setting of speed limits based on the 85th percentile speed. A description of the development of this package and suggestions for its application accompany ...
  • Nonbloated Synthetic Aggregate Concrete
    Nonbloated Synthetic Aggregate Concrete
    Martin, J. R. ;
    Ahmad, H.
    1970-10-01 | PDF
    Thirty-five batches of concrete made from 17 different aggregates made from 5 different clays were investigated. Aggregates were tested for chemical, physical, and mechanical durability by a variety of tests. Relations between clay raw material, aggregate and processing parameters were determined. Concretes were tested for strength, chemical and ph ...
  • Air pollution from hot mix plants
    Air pollution from hot mix plants.
    Burt, W. T. ;
    Gueho, Bruce J.
    1970-10-01 | PDF
    The Louisiana Air Control Commission adopted Regulation II, effective 1969, which sets stringent limits on suspended particulates. Because of the lack of knowledge concerning air pollution caused by hot mix plants within the Stake and because of the unknown consequences of strictly applying the new regulation, a moratorium of one year was allowed t ...
  • Survival in emergency escape from passenger aircraft
    Survival in emergency escape from passenger aircraft.
    Snow, Clyde C. ;
    Carroll, John J.
    1970-10-01 | PDF
    The human factors data from three aircraft accidents involving emergency evacuations are reviewed. Of the 261 passengers aboard, 105 died in attempts to escape during the 1- to 3-minutes prior to the build-up of a lethal thermotoxic environment within the cabin. In all three accidents, decelerative forces were mild and cabin destruction and impact ...
  • Evaluation Of The Flood Risk Factor In The Design Of Box Culverts Vol 1 Theoretical Development
    Evaluation Of The Flood Risk Factor In The Design Of Box Culverts. Vol. 1 Theoretical Development
    Young, GW ;
    Taylor, RS
    1970-09-01 | PDF
    No Description
  • A Laboratory Study of the Relation of Stress to Strain for a Crushed Limestone Base Material
    A Laboratory Study of the Relation of Stress to Strain for a Crushed Limestone Base Material
    Moore, William M. ;
    Britton, Sylvester C.
    1970-09-01 | PDF
    A newly developed optical tracker measuring system was used for observing the dynamic displacement vector at points on the periphery of a compacted triaxial test specimen of granular material subjected to rapid, repetitive loading. The material was a crushed limestone of the type used in highway pavements. The displacement data were converted to co ...
  • Procedures for Estimating the Total Load Experience of a Highway as Contributed by Cargo Vehicles
    Procedures for Estimating the Total Load Experience of a Highway as Contributed by Cargo Vehicles
    Buffington, Jesse L. ;
    Schafer, Dale L.
    1970-09-01 | PDF
    The primary purpose of this research study was to develop and test procedures for making accurate estimates of the total load in terms of 18-kip axle equivalents that a highway will experience from cargo vehicles over its design period. Such an endeavor involved an evaluation of vehicle weight and classification count data previously collected at e ...
  • LongTerm Overturning Loads on Drilled Shaft Footings
    Long-Term Overturning Loads on Drilled Shaft Footings
    Dunlap, Wayne A. ;
    Ivey, Don L.
    1970-09-01 | PDF
    A theory which will predict the ultimate resistance of a drilled shaft footing to overturning loads was presented in Research Report 105-1 and was correlated with model tests reported in Research Report 105-2. The results of full-scale tests on drilled shaft footings were presented and compared to a "Tentative Design Procedure" in Research Report 1 ...
  • Index to FAA Office of Aviation Medicine reports 1961 through 1969
    Index to FAA Office of Aviation Medicine reports : 1961 through 1969.
    1970-09-01 | PDF
    An index to the Office of Aviation Medicine Reports (1961-1969) is presented as a quick reference for those engaged in aviation medicine and related activities.
  • Performance ratings and personality factors in radar controllers
    Performance ratings and personality factors in radar controllers.
    Karson, Samuel ;
    O'Dell, Jerry W.
    1970-09-01 | PDF
    The purpose of the study was to determine whether primary or second-order personality questionnaire factors were related to job performance ratings on the Employee Appraisal Record in a sample of 264 radar controllers. A Pearson correlation matrix was computed based on 19 variables which included EAR part II and part IV, a motivational distortion s ...
  • Twoflash thresholds as a function of comparison stimulus duration
    Two-flash thresholds as a function of comparison stimulus duration.
    Lewis, Mark F. ;
    Mertens, Henry W.
    1970-09-01 | PDF
    The proposal that two-flash thresholds may be used as direct measures of the critical duration (tc) of Bloch's law was tested. Two-flash threshold was found to be an increasing function of comparison stimulus duration for durations of 3 to 22 msec. indicating that two-flash threshold does not measure tc. Increasing luminance in the range of 1.0 to ...
  • A DiscreteElement Analysis for Anisotropic Skew Plates and Grids
    A Discrete-Element Analysis for Anisotropic Skew Plates and Grids
    Vora, Mahendrakumar R. ;
    Matlock, Hudson
    1970-08-01 | PDF
    A discrete-element method of analysis for anisotropic skew-plate and grid beam systems is presented. The method can be used to solve a wide variety of problems. The principal features are (1) formulation of six elastic stiffnesses and compliances in terms of three moduli of elasticity in any three directions and three Poisson's ratios related to th ...
  • Characterization of the Swelling Clay Parameter Used in the Pavement Design System
    Characterization of the Swelling Clay Parameter Used in the Pavement Design System
    Witt III, Arthur W. ;
    McCullough, B. Frank
    1970-08-01 | PDF
    The purpose of this study was to quantify the swelling clay parameter used in the systems approach to pavement design. The quantification of the parameter was to be made using data from standard laboratory soils tests and actual concrete pavements. The pavement sections used in the research were chosen so that only the soil properties of the subgra ...
  • RealTime Information Needs for Urban Freeway Drivers
    Real-Time Information Needs for Urban Freeway Drivers
    Dudek, Conrad L. ;
    Jones, Hal B.
    1970-08-01 | PDF
    To broaden the application of real-time freeway operations systems, the Texas Transportation Institute and the Texas Highway Department, in cooperation with the U. S. Department of Transportation, began a research project entitled "Freeway Control and Information Systems." One of the objectives of the project was to develop functional requirements ...
  • Engineering Aspects of RailHighway Grade Crossing Safety Evaluation
    Engineering Aspects of Rail-Highway Grade Crossing Safety Evaluation
    Rowan, Neilon J. ;
    Walton, Ned E.
    1970-08-01 | PDF
    The diagnostic study team concept was used at thirty-six rail highway grade crossing sites in Texas as a part of an overall study on rail-highway grade crossing safety. The objective of the diagnostic study phase was to determine the type of protection that would provide acceptable efficiency under the conditions encountered on the various classifi ...
  • Final Report on ShrinkageCracking Characteristics of Structural Lightweight Concrete
    Final Report on Shrinkage-Cracking Characteristics of Structural Lightweight Concrete
    Ledbetter, W. B. ;
    Nichols, Gisela
    1970-08-01 | PDF
    Structural lightweight concrete, made with two types of coarse aggregate and with two types of cement (I and III) were subjected to two curing periods followed by a prolonged exposure in a l40oF- 25 percent relative humidity environment. Unrestrained drying shrinkage and restrained cracking were determined. Significant findings included (l) prolong ...
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