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.
A large percentage of deaths in commercial-airline crashes is produced as the body and lower limbs flail around the seat belt. According to a previous study, a 10-foot-diameter sphere of clear area would be necessary to prevent a person from striking some portion of his body against surrounding structures.This study is concerned primarily with head
...
Twenty men with well-documented episodes of myocardial infarction participated in a physical-conditioning program for 3 months or longer during the past 2 years. The activity consisted of intermittent jogging, calesthenics [sic], and competitive games conducted as 1-hour sessions 5 days a week. Average participation by each individual was 3 days a
...
Judgments of the distance of familiar objects, especially other aircraft, are critical aspects of flight safety. In this study, the perception of distance as a function of the retinal size of a familiar object was investigated by simulating a stationary or a radially moving playing card in an otherwise dark visual field. When different observers we
...
A new design, hanging, quick-don crew pressure breathing oxygen mask applicable to jet-transport operations was tested and evaluated in three phases, consisting of (1) exposing five masked subjects to a stepwise altitude-chamber flight profile with a maximum altitude of 43,000 feet; (2) rapidly decompressing five masked subjects from 8,000 to 40,00
...
The selection, development, and operation of several tasks for use in skilled-operator-performance research are described. The tasks are intended, collectively, to sample a broad spectrum of abilities required by complex operator systems; individually they vary to the extent with which demands are placed upon attentional, sensory input, decision, a
...
The paper describes in some detail the means, both physical and physiological, available to man for maintenance of thermal balance. It is also concerned with some aspects of thermal balance and performance when work is performed in hot or cold environments and the enhancement of performance that thermal acclimatization imparts.
Airmen who apply insecticides from aircraft may suffer ill-defined effects from continued exposure to insecticide particles suspended in the air medium. The present series of experiments has been designed to study both lethal and sublethal effects resulting from contact with the chlorinated hydrocarbon insecticide endrin. A large variety of experim
...
In order to evaluate the quality of the cardiovascular adjustments of cardiac patients to exercise, 12 men who had recovered from well-documented episodes of myocardial infarction were evaluated with a work-capacity test while sedentary and after 8 months of regular, vigorous physical activity. Their responses were compared with those of 12 other c
...
A method of solving for the deflected shape of freely discontinuous orthotropic plates and pavement slabs subjected to a variety of loads including transverse loads, in-plane forces and externally applied couples is presented. The method is applicable for plates and pavement slabs with freely variable foundation support including holes in the subgr
...
The broad objective of this project is to fully develop the use of the computer solution of the wave equation so that it may be used to predict driving stresses in piling and be used to estimate the static load bearing capacity of piling from driving resistance records. This report covers the specific objective of determining the dynamic load-defor
...
This report on numerical radial triangulation contains the results of Research Contract Number 3-8-64-79 performed by The University of Texas for the Texas Highway Department and the U.S. Bureau of Public Roads. The purpose of this report was to investigate and evaluate the use of radial triangulation for extending control, with precise measurement
...
This report is an evaluation of the recently developed "Louisiana Slope Value Method".The conclusion drawn are based on data from 637 separate samples representing nearly all major soil groups in Louisiana that are suitable for cement stabilization.These data show that more than 92 percent of all cement contents recommended were within plus or minu
...
The objective of the study covered by this report was to determine whether the family of curves developed for untreated soils, could be used for determining the optimum moisture and maximum density of lime treated soils. This investigation was initiated because of the extensive use of lime with plastic clays and silty clays to reduce plasticity and
...
A system for virtually continuous measurement of both systolic and diatolic blood pressures without recourse to direct arterial puncture has been effected by the modification of already existing standard equipment. This system entails the measurement of systolic blood pressure with a digital pressure cuff on one arm simultaneously with the measurem
...
The effects of a tranquilizing drug of the propaediol group, meprobamate, on thermal balance of men exposed to a cold (50F, 10C), hot (110F, 43.3C), or neutral (80F, 26.7C) environment have been investigated. Results show that a single dose of meprobamate (800 mg) has no effect on temperature regulation of men resting in a neutral environment.Durin
...
The concept of time of useful consciousness fails to take into account the progressive decay that occurs in performance under hypoxic conditions. This study, using a means of quantitatively assessing such a decrement, presents data obtained in a series of chamber runs at 27,500 and 35,000 feet. The performance-decrement functions appear to follow t
...
This study was designed to determine the economic changes that occurred in the small town of Merkel as a result of constructing Interstate 20 around the principal residential and commercial areas. The results of the study may be used in anticipating the economic effects of the Interstate Highway System upon comparable small towns. The principal obj
...
This report includes the laboratory evaluation of lightweight aggregates from seven sources, six in Texas and one in Louisiana. Two of these materials have been field tested on an extensive scale, although the field evaluations reported herein are limited to one source of material.
The purpose of this paper is to briefly describe the phenomena which can cause cracking and spalling of prestressed concrete piles during driving and to outline procedures which will prevent these problems. In some cases of driving of prestressed concrete piles, cracking and spalling have been encountered and in most instances these problems can be
...
The objective of the research reported here was to adapt recommended chemical methods of plant control to highway requirements, and investigate other plant control techniques which might apply to certain highway vegetation control problems.
Links with this icon indicate that you are leaving a Bureau of Transportation
Statistics (BTS)/National Transportation Library (NTL)
Web-based service.
Thank you for visiting.
You are about to access a non-government link outside of
the U.S. Department of Transportation's National
Transportation Library.
Please note: While links to Web sites outside of DOT are
offered for your convenience, when you exit DOT Web sites,
Federal privacy policy and Section 508 of the Rehabilitation
Act (accessibility requirements) no longer apply. In
addition, DOT does not attest to the accuracy, relevance,
timeliness or completeness of information provided by linked
sites. Linking to a Web site does not constitute an
endorsement by DOT of the sponsors of the site or the
products presented on the site. For more information, please
view DOT's Web site linking policy.
To get back to the page you were previously viewing, click
your Cancel button.