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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 33661 - 33680 of 35412 results
  • Visual evaluation of smokeprotective devices
    Visual evaluation of smoke-protective devices.
    Vaughan, John A. ;
    Welsh, Kenneth W.
    1976-05-01 | PDF
    This study was designed to determine the visual characteristics of smoke-protective devices for flight deck crews. Visual measurements were made on five male subjects, who ranged in age from 35 to 54, while they were wearing each of the 26 devices tested. These measurements included1.visual field,2.visual acuity,3.stereoscopic depth perception,4.co ...
  • Energy Absorbing Bumpers for Transit Buses Transbus Program
    Energy Absorbing Bumpers for Transit Buses: Transbus Program
    Booz, Allen Applied Research Inc.
    1976-05-01 | PDF
    This report describes the results of a program to test and evaluate the potential benefits of energy absorbing bumpers for transit buses. The objective of the program is to determine, through controlled tests, the capabilities/limitations of six new design energy absorbing bumper systems. Principal emphasis is placed upon the bumper system performa ...
  • Design and Evaluation of Freeway Surveillance and Traffic Control Systems
    Design and Evaluation of Freeway Surveillance and Traffic Control Systems
    McCasland, William R.
    1976-05-01 | PDF
    Studies of urban traffic operations were conducted on the freeways of Texas to determine the design and effectiveness of traffic control and surveillance systems; to relieve peak period congestion; to lessen the impact of disabled vehicles on the operation and safety of the freeways; and reduce the incidents of overhead structure damage by over-hei ...
  • Dynamic Properties of Subgrade Soils Including Environmental Effects
    Dynamic Properties of Subgrade Soils, Including Environmental Effects
    Edris Jr, Earl V. ;
    Lytton, Robert L.
    1976-05-01 | PDF
    Three fine-grained soils, varying in clay content between 20% and 70%, were tested in a unique repet1ttve loading apparatus to determine how soil suction! temperature, and stress state affect the resilient modulus and residual strains expected under highway and railroad loadings. ln developing equations to predict these dynamic properties, three va ...
  • Diagrammatic sign study final report
    Diagrammatic sign study : final report.
    Babin, Dennis W.
    1976-04-01 | PDF
    This research was undertaken to evaluate the effectiveness of a diagrammatic sign as compared to a conventional sign at a particular location. The measure selected for determining sign effectiveness was erratic traffic maneuvers. It was assumed that any significant differences in the proportion of erratic maneuvers "before" and "after" the diagramm ...
  • Aviation medicine translations annotated bibliography of recently translated material IX
    Aviation medicine translations : annotated bibliography of recently translated material, IX.
    Constant, Gregory N. ;
    Grimm, E. Jean
    1976-04-01 | PDF
    An annotated bibliography of translations of foreign-language articles is presented. The 20 listed entries are concerned with studies of cardiology; aviation vestibular testing and vestibular factors in accidents; use of bones of identification of remains; psychological characteristics associated with pilots, stewardesses, and nuclear workers; stre ...
  • WeighinMotion systems evaluation final report
    Weigh-in-Motion systems evaluation : final report.
    Burt, James O. ;
    Babin, Dennis W.
    1976-04-01 | PDF
    This relatively short-term project was initiated in order to perfect installation, operation, and maintenance practices necessary for continued accurate and reliable operation of a computerized Weigh-in-Motion system which will be used to gather truck weight data in a long-term study to improve flexible pavement design.A complete Weigh-in-Motion Sy ...
  • Lateral Support Systems And Underpinning Volume I Design And Construction
    Lateral Support Systems And Underpinning. Volume I: Design And Construction
    Goldberg, DT ;
    Jaworski, WE
    1976-04-01 | PDF
    This volume is a convenient reference on the design and construction of lateral support systems and underpining which are often required in conjunction with cut-and-cover or soft ground tunneling. The design recommendations and construction methods described herein are a summary of the more detailed information presented in the companion volumes of ...
  • Lateral Support Systems and Underpinning Volume III Construction Methods
    Lateral Support Systems and Underpinning, Volume III: Construction Methods
    Goldberg, Donald T. ;
    Jaworski, Walter E.
    1976-04-01 | PDF
    This report provides current information and design guidelines on cut-and-cover tunneling for practicing engineers. The main emphasis is on the geotechnical aspects of engineering. Included in this volume is a state-of-the-art summary of displacements and lateral pressure. Other topics are basic concepts of soil mechanics, ground water in open cut, ...
  • Lateral Support Systems And Underpinning Volume II Design Fundamentals
    Lateral Support Systems And Underpinning. Volume II. Design Fundamentals
    Goldberg, DT ;
    Jaworski, WE
    1976-04-01 | PDF
    This report provides current information and design guidelines on cut-and-cover tunneling for practicing engineers. The main emphasis is on the geotechnical aspects of engineering. Included in this volume is a state-of-the-art summary of displacements and lateral pressure. Other topics are basic concepts of soil mechanics, ground water in open cut, ...
  • Wet Weather Accident Reduction A BenefitCost Approach
    Wet Weather Accident Reduction: A Benefit/Cost Approach
    Davis, Merritt M. ;
    McFarland, William F.
    1976-04-01 | PDF
    Thirty-six highway control sections were analyzed for the effectiveness of renewal of surface friction. After elimination of sections serving as links for incomplete interstate routes and of sections requiring upgrading, 23 sections remained. A criterion was developed to estimate a normal number of wet road accidents and hence the potential acciden ...
  • The Wheat Farmers Contribution to Rising Bread Prices
    The Wheat Farmers' Contribution to Rising Bread Prices
    Wilson, William W. ;
    Griffin, Gene C.
    1976-03-01 | PDF
    The purpose of this paper is two-fold: 1) to demonstrate the fact that there has been a structural change with regard to the ingredient cost/retail cost relationship in recent years in the bread processing industry; and 2) to establish the fact that the American wheat farmer is neither the great benefactor nor cause of rising bread prices.
  • Vibratory roller evaluation study final report
    Vibratory roller evaluation study : final report.
    Glascock, Lacey A.
    1976-03-01 | PDF
    The Louisiana Department of Highways has recently completed a program to evaluate the use of vibratory rollers in the compaction of asphaltic concrete pavements. In all, a total of nine different vibratory rollers was tested along with conventional static weight roller previously required by Specifications. Emphasis of the evaluation is centered up ...
  • Massed versus distributed practice in learned improvement of speech intelligibility
    Massed versus distributed practice in learned improvement of speech intelligibility.
    Tobias, Jerry V.
    1976-03-01 | PDF
    Student pilots or new air traffic controllers have two ways to learn to understand the noisy and distorted communications common to aircraft operations: they may learn as they are working on other aspects of the activity, or they may learn by devoting a continuous period of time to speech-intelligibility improvement. Work completed at this laborato ...
  • North Dakota Grain Transportation Statistics 197475
    North Dakota Grain Transportation Statistics 1974–75
    Wilson, William W.
    1976-03-01 | PDF
    This report represents a continuation of analyses concerned with the patterns and methods of distributing grain from North Dakota. This series began with the analysis of 1956-57 data and was published in Agricultural Economics Report 14, Department of Agricultural Economics, North Dakota State University. Subsequent years' data were analyzed in Agr ...
  • Effects of Ground Trainer Use on the Psychological and Physiological States of Students in Private Pilot Training
    Effects of Ground Trainer Use on the Psychological and Physiological States of Students in Private Pilot Training
    Smith, R.C. ;
    Melton, C.E.
    1976-03-01 | PDF
    Student pilots receiving all instruction in an aircraft and student pilots who received a portion of their flight training in a ground trainer were compared in terms of flying proficiency, psychological (anxiety) states during training, and certain physiological measures. Pilot performance appeared to be equal in both groups, as measured by objecti ...
  • Prediction of Thermal Reflection Cracking in West Texas
    Prediction of Thermal Reflection Cracking in West Texas
    Chang, Hang-Sun ;
    Lytton, Robert L.
    1976-03-01 | PDF
    An economical means of rehabilitating deteriorated pavement is through the use of an overlay. The performance of overlay systems has, however, been far from satisfactory as the performance of any one system has varied widely among different installation sites. This study presents a rational approach for the prediction of overlay life and gives reco ...
  • A Study of OnFreeway Lane Closure in the Merge Area of Two Freeways
    A Study of On-Freeway Lane Closure in the Merge Area of Two Freeways
    Fullerton, Richard V. ;
    McCasland, William R.
    1976-03-01 | PDF
    An On-Freeway Lane Closure to adjust the capacity of two roadways to a merge point in order to improve the efficiency of operation of the total I.H. 10-I.H. 610 interchange in Houston is evaluated. Delay studies conducted on I.H. 610 northbound show that closing the outside lane of I.H. 10 facilitates merge operations which result in a savings of a ...
  • Assessment of Community Planning for Mass Transit Volume 12 Bibliography
    Assessment of Community Planning for Mass Transit: Volume 12: Bibliography
    Skidmore, Owings & Merrill  ...
    1976-02-01 | PDF
    This bibliography lists publications consulted or referenced during An Assessment of Community Planning for Mass Transit, a study sponsored by Office of Technology Assessment. The bibliography has three parts. Each reference is listed on the access index, which identifies the type of publication, the author's general approach, the publication's geo ...
  • Assessment of Community Planning for Mass Transit Volume 9 Seattle Case Study
    Assessment of Community Planning for Mass Transit: Volume 9: Seattle Case Study
    Skidmore, Owings & Merrill  ...
    1976-02-01 | PDF
    This report on urban transportation planning in the Seattle metropolitan area is one of nine case studies undertaken by the Office of Technology Assessment to provide an information base for an overall assessment of community planning for mass transit. The findings of the overall study are reported in the summary document, An Assessment of Communit ...
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