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.
It was found that valid predictions of the use of containers were extremely difficult to make because of the lack of reliable data. Further, during the time of the study, the local ports negotiated for international consolidation, the dollar was devalued, and relations with foreign countries and the nation's export policies were changed. Because th
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It is apparent that a simple cookbook method for designing questionnaires of all types is not available. Researchers must realize that the questionnaire is an integral part of his research effort and as such it should be tailored to his particular needs. This tailoring process is generally an iterative one whereby the researcher pilots the followin
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Crash investigation techniques utilized by human factors teams in investigating commercial airline crashes have been applied in the analysis of a railroad train derailment - crash. Passengers in cars that remained upright experienced very low deceleration forces and practically no injuries in stopping from a speed of 90 miles per hour over distance
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792 JOURNEYMAN AIR TRAFFIC CONTROLLERS FROM ARTCC, TRACON, and FSS facilities answered a four-part questionnaire concerning1.what they liked and disliked about ATC work,2.how much they liked or disliked certain specific aspects of ATC work,3.how they felt about shift work, and4.their level of job satisfaction.The three ATC specialties are compared
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Sedimentation in ponds is an important problem for several reasons. The depletion of pond storage capacity is of major concern. Sediments also may degrade the water by burying bottom-dwelling plants and animals and may carry harmful chemicals which promote entrophication and kill aquatic life. Road construction may be a major contributor to the sil
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A design method for secondary roads (based on AASHO Road Test results and experience in Virginia) is described which consists of two parts: the evaluation of the soil support value of the subgrade, the thickness equivalencies of the paving materials, and the traffic in terms of vehicles per planning actions. The References are classified under of t
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Fabric reinforcement was used in an attempt to prevent reflection cracking of two bituminous concrete layers overlying an 8-inch plain (unreinforced, unjointed) concrete base that was underlain by a portland cement stabilized subbase material. On these pavements it was expected that the extremely rigid base and subbase layers would reduce vertical
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This literature review summarizes the research findings relative to the performance of high intensity (encapsulated lens) reflective sheeting. The study reveals that the brightness and durability of the encapsulated lens material are superior to those of the conventional enclosed lens sheeting utilized by the Highway Department. The high intensity
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Over the last three years the Virginia Highway Research Council has directed a research effort toward improving the method of determining the moisture content of soils with a nuclear gage. The first task in this research was the determination of the correct moisture calibration curve for the nuclear gages being used (Troxler Models 227 and 2401). F
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The study was designed to determine if strains in Virginia's thin asphaltic pavements were high enough to cause early fatigue failure. Strains were computed with the Chevron multilayer computer program, and also measured on selected highways using electrical strain gages and a dynamic recording system.
This primer presents a brief state-of-the art review of motor vehicle air pollution. Its purpose is to aid highway personnel in understanding the nature of this environmental problem on our highways and to present possible solutions for its abatement. The primer discusses the type of vehicular pollutants (namely, carbon monoxide, hydrocarbons, oxid
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The objective of this study was to gather and tabulate baseline data on selected attitudes and opinions held by the public of Fairfax County, Virginia. The study was designed to assist the program of the Alcohol Safety Action Project, currently in operation in that county. The subject matter of this initial study of Fairfax County was public opinio
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United States. Department of Transportation. Federal Highway Administration. Offices of Research and Development
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1973-01-01
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This study of cut-and-cover tunneling techniques in urban areas considers environmental quality, geotechnical investigation and analysis, ground support, ground water control, permanent structure, restoration, cost considerations and major problems. Both United States and Foreign techniques are reviewed. This volume consists of summaries of signifi
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