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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 33501 - 33520 of 35412 results
  • A Report on the Users Manual for Diamond Interchange SignalizationPASSER III
    A Report on the User’s Manual for Diamond Interchange Signalization-PASSER III
    Fambro, Daniel B. ;
    Putman, Donald L.
    1977-08-01 | PDF
    This report describes the user's manual for PASSER III, a practical computer program developed to assist the traffic engineer in determining optimal traffic signal timings for pretimed or traffic-responsive, fixed sequence signalized diamond interchanges. The program is applicable to isolated interchanges as well as to a series of interchanges thro ...
  • New Materials Promote Safety Belt Usage
    New Materials Promote Safety Belt Usage
    United States. Department of Transportation. National Highway Traffic Safety Administration
    1977-07-20 | PDF
    A new series of pamphlets on safety belts for use by educators was announced today by the Department of Transportation in its continuing effort to encourage use of belts to reduce automobile fatalities and injuries.
  • Readability of alphanumeric characters having various contrast levels as a function of age and illumination mode
    Readability of alphanumeric characters having various contrast levels as a function of age and illumination mode.
    Welsh, K.W. ;
    Rasmussen, P.G.
    1977-07-01 | PDF
    Readability data of alphanumeric characters that vary in figure-to- ground contrast ratio were obtained from 36 subjects; 12 subjects were placed in each of three age groups (20-25 yr, 40-45 yr, and 60-65 yr). Minimum illuminance required to identify all contrast combinations was determined at a viewing distance of 40 cm (15.7 in) under dim white a ...
  • The effect of increased monitoring load on vigilance performance using a simulated radar display
    The effect of increased monitoring load on vigilance performance using a simulated radar display.
    Thackray, Richard I. ;
    Bailey, J. Powell
    1977-07-01 | PDF
    The present study examined the extent to which level of target density influences the ability to sustain attention to a complex monitoring task requiring only a detection response to simple stimulus change. The visual display was designed to approximate a futuristic, highly automated air traffic control radar display containing computer-generated a ...
  • Effects of lithium carbonate on performance and biomedical functions
    Effects of lithium carbonate on performance and biomedical functions.
    Higgins, E. ;
    Chiles, W.
    1977-07-01 | PDF
    The effects of a single 600-mg dose of lithium carbonate were evaluated in a study of 15 healthy, normal male subjects. Subjects were studied, on two occasions, by utilizing a double-blind design--once receiving the lithium carbonate and once receiving a lactose placebo.Measurements were made of1.complex performance, using the CAMI Multiple Task Pe ...
  • Emergency escape of handicapped air travelers
    Emergency escape of handicapped air travelers.
    Blethrow, J.G. ;
    Garner, J.D.
    1977-07-01 | PDF
    This report describes a study conducted by the Civil Aeromedical Institute to investigate potential problems related to the emergency evacuation of civil aircraft carrying handicapped passengers.The study includes an analysis of the movement of individual handicapped subjects in an aircraft cabin and the results of evacuation tests in which a porti ...
  • Perceived orientation of a runway model in nonpilots during simulated night approaches to landing
    Perceived orientation of a runway model in nonpilots during simulated night approaches to landing.
    Mertens, Henry W.
    1977-07-01 | PDF
    Illusions due to reduced visual cues at night have long been cited as contributing to the dangerous tendency of pilots to fly too low during night landing approaches. The cue of motion parallax (a difference in rate of apparent movement of objects in the visual field) is frequently suggested as contributing to visual judgments of glide path but has ...
  • Objective methods for developing indices of pilot workload
    Objective methods for developing indices of pilot workload.
    Chiles, W. Dean
    1977-07-01 | PDF
    This paper discusses the various types of objective methodologies that either have been or have the potential of being applied to the general problem of the measurement of pilot workload as it occurs on relatively short missions or mission phases. Selected studies that have dealt with the workload measurement problem or some similar problem are rev ...
  • Refractive error characteristics of early and advanced presbyopic individuals
    Refractive error characteristics of early and advanced presbyopic individuals.
    Welsh, K.W. ;
    Rasmussen, P.G.
    1977-07-01 | PDF
    The frequency and distribution of ocular refractive errors among middle-aged and older people were obtained from a nonclinical population holding a variety of blue-collar, clerical, and technical jobs. The 422 individuals ranged in age from 35 to 69 years and were volunteers for several vision research studies conducted primarily at the FAA Civil A ...
  • An Analysis of Transportation Planning Effectiveness
    An Analysis of Transportation Planning Effectiveness
    Stearns, Mary D. ;
    Cooper, Edward
    1977-07-01 | PDF
    The report documents a novel methodology and analysis procedure for measuring a program's effect, and it is based on data from case studies of a representative group of twenty urban areas, conducted during 1976, which are reported in a companion report titled: Transportation Planning Effectiveness: Twenty Case Studies. The twenty urban areas repres ...
  • Altitude Tolerance of General Aviation Pilots with Normal or Partially Impaired Spirometric Function
    Altitude Tolerance of General Aviation Pilots with Normal or Partially Impaired Spirometric Function
    Lategola M.T. ;
    Flux M.
    1977-07-01 | PDF
    The altitude tolerance of 10 spirometrically impaired (SI) general aviation pilots with an average forced midexpiratory flow (FEF sub 25-75%) value of 65.1 percent was compared to that of 10 spirometrically normal (SN) pilots. Cardiorespiratory parameters assessed at ground level (GL) and at 8,000- and 12,500-ft altitudes were blood pressure, pulmo ...
  • Effectiveness of Highway Arterial Lighting Final Report
    Effectiveness of Highway Arterial Lighting: Final Report
    Janoff, M. S. ;
    Koth, B.
    1977-07-01 | PDF
    This research was undertaken to evaluate the cost-benefits of arterial highway lighting treatments in terms of traffic safety and energy usage. The results have shown that total nighttime dry weather accidents are inversely related to visibility, higher visibility resulting in fewer accidents. Areas with high population densities have a much higher ...
  • Effectiveness of Highway Arterial Lighting Design Guide
    Effectiveness of Highway Arterial Lighting: Design Guide
    Janoff, M. S. ;
    Koth, B.
    1977-07-01 | PDF
    This research was undertaken to evaluate the cost-benefits of arterial lighting treatments in terms of traffic safety and energy use. As a result, a Design Guide has been developed to assist potential users in conducting cost-benefit analyses of lighting changes at specific locations. This Design Guide provides instructions for using a computer pro ...
  • Operational Experience with Concurrent Flow Reserved Lanes
    Operational Experience with Concurrent Flow Reserved Lanes
    Fuhs, Charles A. ;
    Fitzgerald, A. V.
    1977-07-01 | PDF
    This report presents an evaluation of the concurrent flow reserved lane concept to improve the capacity of urban traffic facilities in metropolitan areas. The purpose of this effort is to evaluate the applicability of this concept to urban freeways in Texas. The concurrent flow reserved lane concept is described, and some of the advantages and limi ...
  • Design of ZeroMaintenance Plain Jointed Concrete Pavement Vol I Development of Design Procedures
    Design of Zero-Maintenance Plain Jointed Concrete Pavement, Vol. I - Development of Design Procedures
    Darter, Michael I.
    1977-06-08 | PDF
    Comprehensive procedures for the structural design of "zero-maintenance" plain jointed concrete pavements for heavily trafficked roadways are development. The term "zero-maintenance" refers to the structural adequacy of the pavement lanes and shoulder. Thus, a "zero-maintenance" pavement would not require maintenance such as patching, joint repair, ...
  • Design of ZeroMaintenance Plain Jointed Concrete Pavement Vol II Design Manual
    Design of Zero-Maintenance Plain Jointed Concrete Pavement, Vol. II - Design Manual
    Darter, Michael I. ;
    Barenberg, Ernest J.
    1977-06-08 | PDF
    This manual is an engineering guide for the design of heavily trafficked plain jointed concrete pavements to provide "zero-maintenance" performance over a selected design period. The term "zero-maintenance" refers only to structural maintenance such as patching, crack repair, slab replacement, grinding of faults, and overlay. Procedures are include ...
  • Evaluation of vacuum pycnometer final report
    Evaluation of vacuum pycnometer : final report.
    Carey, Donald E.
    1977-06-01 | PDF
    This report is concerned with the evaluation of the Yale vacuum pycnometer to determine the feasibility of its use for the rapid determination of maximum specific gravity and asphalt content of bituminous paving mixtures. Asphalt contents of plant-mixed samples from four Louisiana mix types were calculated from the pycnometer determined maximum spe ...
  • Skid resistance study final report
    Skid resistance study : final report.
    Walters, William C.
    1977-06-01 | PDF
    This is a report of a research project involving, in Phase I, the skid resistance of asphaltic concrete overlays. Phase II is a report of a pilot study set up in order to determine the best way to perform a skid resistance inventory of the highway network in Louisiana.Phase I was conducted from August 1969 to August 1974 and included the skid testi ...
  • Assessment of National Small Rural Watersheds Program Volume 2 Appendixes
    Assessment of National Small Rural Watersheds Program: Volume 2, Appendixes
    Fiering, Myron B. ;
    Sharpin, R. E.
    1977-06-01 | PDF
    A State-by-State assessment is made of the current status of the National Small Rural Watersheds Program with regard to adequacy of data collection and analysis. Methodology is recommended for flood frequency estimation to replace currently used biased approaches. Concepts of risk aversion are discussed, and decision criteria based on economic cons ...
  • Assessment of National Small Rural Watersheds Program Volume 1 Technical Report
    Assessment of National Small Rural Watersheds Program: Volume 1, Technical Report
    Fiering, Myron B. ;
    Sharpin, R. E.
    1977-06-01 | PDF
    A State-by-State assessment is made of the current status of the National Small Rural Watersheds Program with regard to adequacy of Data collection and analysis. Methodology is recommended for flood frequency estimation to replace currently used biased approaches. Concepts of risk aversion are discussed, and decision criteria based on economic cons ...
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