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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 34301 - 34320 of 35412 results
  • A Pavement Feedback Data System
    A Pavement Feedback Data System
    Strom, Oren G. ;
    Hudson, W. Ronald
    1972-05-01 | PDF
    The complex character of highway pavements coupled with ever-increasing traffic volumes and variability of climatic conditions have made it imperative that service life data be collected and analyzed to guide the design of new and reconstructed pavements. The road test approach inevitably omits some important aspects of performance and the mechanis ...
  • Establishment and Management of Roadside Vegetation 1971
    Establishment and Management of Roadside Vegetation, 1971
    McCully, Wayne G. ;
    Stubbendieck, James L.
    1972-05-01 | PDF
    Tests were installed in 1971 to modify roadside soil materials limiting plant growth and to develop chemical treatments for controlling unwanted vegetation. Plastic clays which show a poor tendency toward granulation can be modified by treatment with cationic polymers to favor vegetation establishment. Other treatments such as gypsum and certain so ...
  • Evaluation of Breakaway Lightpoles for Use in Highway Medians
    Evaluation of Breakaway Lightpoles for Use in Highway Medians
    Walton, N. E. ;
    Hirsch, T. J.
    1972-05-01 | PDF
    Crash tests were conducted to determine the impact behavior of median-mounted luminaire supports and secon4ary collisions of vehicles striking downed poles on a traffic lane. A relative hazard index was developed to describe the relative hazard created by the proximity and frequency of luminaire supports. It was concluded that a 20° impact by a 290 ...
  • Development of a Technique for Digital Computer Control of a Safety Warning System for Urban Freeways
    Development of a Technique for Digital Computer Control of a Safety Warning System for Urban Freeways
    Dudek, Conrad L.
    1972-05-01 | PDF
    A control technique for digital computer control of a safety warning system for urban freeways was developed and evaluated. Traffic energy was used as the control variable. Computer logic was developed centered about critical energy as the control parameter. The ability of the critical energy parameter to detect stoppage waves was studied and evalu ...
  • Design of a Safety Warning System Prototype for the Gulf Freeway
    Design of a Safety Warning System Prototype for the Gulf Freeway
    Dudek, Conrad L. ;
    Biggs, Raymond G.
    1972-05-01 | PDF
    This report discusses the development of a safety warning system for urban freeways. The system is designed to alert motorists of freeway stoppages which occur downstream of overpasses. The design features of a prototype system installed on the Gulf Freeway are discussed.
  • A Theoretical and Experimental Study of Dynamic Highway Loading
    A Theoretical and Experimental Study of Dynamic Highway Loading
    Al-Rashid, Nasser I. ;
    Lee, Clyde E.
    1972-05-01 | PDF
    A generalized mathematical model which characterizes the dynamic behavior of five different classes of highway vehicles is described in this report. The model consists of a series of interconnected masses, springs, and dashpots and is used to predict the magnitude, duration, and location of dynamic wheel loads applied normal to the roadway surface ...
  • Variable message fog hazard warning signs to control vehicle operating characteristics interim report Interstate 5 North Albany
    Variable message fog hazard warning signs to control vehicle operating characteristics : interim report, Interstate 5, North Albany.
    Oregon. Dept. of Transportation. Highway Division
    1972-04-01 | PDF
    This project is aimed at determining the effectiveness of variable message signs in controlling traffic on an Interstate highway during periods of hazardous driving conditions such as fog, vehicle accidents, or congestion.The effectiveness of the signs is being measured quantitatively by use of accident records, vehicular speeds, and headways. Insu ...
  • Crash survival analysis of 16 agricultural aircraft accidents
    Crash survival analysis of 16 agricultural aircraft accidents.
    Swearingen, J.J. ;
    Wallace, T.F.
    1972-04-01 | PDF
    The study presents pertinent findings from on-the-scene investigations to evaluate the crashworthiness of the present fleet of agricultural applicator aircraft. A detailed presentation of 16 crashes illustrates the fact that most of these specialized aircraft structures are well designed to protect the pilot, even in severe crashes. Most injuries a ...
  • Flexible Pavement System Computer Program Documentation
    Flexible Pavement System Computer Program Documentation
    Schafer, Dale L.
    1972-04-01 | PDF
    This report gives the documentation of the computer program FPS-9 used for implementation of the flexible pavement design system. This documentation is also in machine readable form to make possible a continuing documentation system for updates and improvements in the Flexible Pavement System (FPS) series of computer programs. Included in this repo ...
  • Skid Resistance Considerations in the Flexible Pavement Design System
    Skid Resistance Considerations in the Flexible Pavement Design System
    Steitle, David C. ;
    McCullough, B. Frank
    1972-04-01 | PDF
    This report summarizes work completed by Research Project 123 at the Center for Highway Research concerning skid resistance considerations in Flexible Pavement System (FPS). The study traces the progression of analysis and the development of a skid resistance decay model. Also presented is a method which the design engineer may find useful in apply ...
  • Criteria for Guardrail Need and Location on Embankments Volume I Development of Criteria
    Criteria for Guardrail Need and Location on Embankments Volume I: Development of Criteria
    Ross, Jr., Hayes E. ;
    Post, Edward R.
    1972-04-01 | PDF
    The information contained herein was developed on Research Project 2-5-69-140 entitled "Evaluation of the Roadside Environment by Dynamic Analysis of the Interaction Between the Vehicle, Passenger, and Roadway" which is a cooperative research study sponsored jointly by the Texas Highway Department and the U. S. Department of Transportation, Federal ...
  • Program Documentation Manual for the Texas Small Network Package
    Program Documentation Manual for the Texas Small Network Package
    Benson, J. D. ;
    Bell, Charles E.
    1972-04-01 | PDF
    The Texas Small Network Package is a collection of computer programs designed to assign traffic to small transportation networks. The purpose of this manual is to provide data processing personnel with a link between the Operating Manual for the Texas Small Network Package (Research Report 119-1) and the programs contained in the package. The manua ...
  • Program Documentation Manual for the Texas Large Network Package
    Program Documentation Manual for the Texas Large Network Package
    Benson, J. D. ;
    Bell, Charles E.
    1972-04-01 | PDF
    The Texas Large Network Package is a collection of computer programs designed to assign traffic to large transportation networks. The purpose of this manual is to provide data processing personnel with a link between the Operating Manual for the Texas Large Network Package (Research Report 119-2) and the programs contained in the package. The manua ...
  • Department of Transportation News Urban Mass Transportation Administration UMTA 7216
    Department of Transportation News: Urban Mass Transportation Administration: UMTA 72-16
    United States. Department of Transportation. Urban Mass Transit Administration
    1972-03-31 | PDF
    Press release for the Urban Mass Transportation Administration (now Federal Transit Administration). This press release announces that the Department of Transportation made an additional $7.5 million grant to the Metropolitan Atlanta Rapid Transit Authority (MARTA) to assist in financing the acquisitions of the Atlanta Transit System and the purcha ...
  • A comparison of serum cholinesterase methods II
    A comparison of serum cholinesterase methods : II.
    Crane, Charles R. ;
    Sanders, Donald C.
    1972-03-01 | PDF
    Among aerial applicator personnek, the primary value of the periodic blood cholinesterase (ChE) assays is the detection of pesticide poisoning indicated by a decrease in the enzyme activity since the previous (or pre-season) assay. Comparison of these values is difficult if they are based on different methodologies and expressed in different units, ...
  • Attrition from active airman status during 1970
    Attrition from active airman status during 1970.
    Booze, Charles F.
    1972-03-01 | PDF
    Attrition from an active airman status amounts to approximately 17% annually. Summary data presented have served to quantify, to some extent, the characteristics of airmen medically certified during 1968 subsequently becoming attrition during 1970. The contribution of medical factors to attrition has been considered as well as experience, occupatio ...
  • The colorword interference test and its relation to performance impairment under auditory distraction
    The color-word interference test and its relation to performance impairment under auditory distraction.
    Thackray, Richard I. ;
    Jones, Karen N.
    1972-03-01 | PDF
    The ability to resist distraction is an important requirement for air traffic controllers. The study examined the relationship between performance on the Stroop color-word interference test (a suggested measure of distraction susceptibility) and impairment under auditory distraction on a task requiring the subject to generate random sequences of le ...
  • Index to FAA Office of Aviation Medicine reports 1961 through 1971
    Index to FAA Office of Aviation Medicine reports : 1961 through 1971.
    Dille, J. Robert ;
    Grimm, Marcia H.
    1972-03-01 | PDF
    An index to Office of Aviation Medicine Reports (1964-1971) and Civil Aeromedical Research Institute Reports (1961-1963) is presented as a quick reference for those engaged in aviation medicine and related activities. It provides a listing of all FAA aviation medicine reports published from 1961 through 1971 by year, number, author, subject and tit ...
  • Effects of backscatter of brief high intensity light on physiological responses of instrumentrated pilots and nonpilots
    Effects of backscatter of brief high intensity light on physiological responses of instrument-rated pilots and non-pilots.
    Zeiner, Arthur R. ;
    Brecher, Gerhard A.
    1972-03-01 | PDF
    Thirty-nine human subjects were exposed to reptitive backscatter light stimulation (off a white wall or fog) from a Grimes capacitance discharge airplane anticollision light flashing at 1.27 Hertz. Both tonic (light stimulus absent) and phasic (light stimulus present) stimulus-bound occipital EEG, heart rate, respiration, skin potentials, and eyebl ...
  • Physiological evaluation of a modified jet transport passenger oxygen mask
    Physiological evaluation of a modified jet transport passenger oxygen mask.
    McFadden, Ernest B.
    1972-03-01 | PDF
    The paper describes altitude chamber experiments conducted with human subjects using a new continuous-flow disposable passenger mask applicable for emergency use to maximum altitudes of 41,000 feet. This mask design differs in configuration from the previous omni-directional maska designed to meet the requirements of Nationaal Aerospace Standard 11 ...
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