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.
By use of histochemical blocking and extraction procedures, it was possible to show that the cytoplasmic compound to which the Weil stain attaches is a lipid containing a secondary amine. It is suggested that the compound could be further characterized chemically. This material is increased in dieldrin and endrin poisoning and decreased in cold ada
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This report is one of a series of developments planned to facilitate theuse of computers in the analysis of highway bridge structures. It specificallyconcerns a computer program for the bending analysis of bent caps.The development of this program began in June 1963 under sponsorship of theTexas Highway Department, Research Project 3-5-63-56, in co
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One of the primary objectives of this project was to develop a suitable method of fabricating specimens and determining laboratory compaction characteristics of granular materials. The need for this study became apparent from the results of two other projects conducted by the Texas Transportation Institute. Phase Three of Project 2-8-62-32, "Applic
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It was the objective of this study to investigate the U-turn movement of frontage road traffic in order to determine its effect on the delay produced at signalized intersections and to determine minimum design criteria required to facilitate this movement at freeway interchanges.
Through the cooperation of the city of Austin, Texas and the Texas Highway Department, the Texas Transportation Institute conducted a study of photometrics at the location of one of the 150-foot "moonlight" towers in Austin. This tower was equipped with six vertical burning mercury vapor lamps mounted in radial reflectors at uniform angular spacing
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The Texas Transportation Institute, in cooperation with the Texas Highway Department and U. S Bureau of Public Roads, is conducting research on synthetic aggregates for highway use. We are involved in facets of the use of synthetic aggregates from structural grade portland cement concrete to asphaltic concrete and to flexible base. Several research
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This report describes the testing performed with reef shell, clam shell and a combination of reef and clam shell used as coarse aggregate to determine if a low modulus concrete could be developed for use as a base material as an alternate to the presently used cement stabilized bases.The tests in included, compressive, flexural and tensile strength
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The study provides correlative information with respect to the comparative accuracy of the traditional 'cuff' clinical method of obtaining blood pressure and the laboratory catheterization procedure which measures actual blood pressure. The information is vital to those aviation medicine specialists who study the cardiovascular aspects of work, str
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Ten men were subjected to intermittent photic stimulation in an airplane cockpit in an environmental chamber by (1) a Grimes red rotating beacon (1.5 FPS), (2) an Air Guard strobe light (1.0 FPS) and (3) propeller flicker (10 FPS). IFR conditions were simulated by passing steam into the cooled chamber. Electroencephalograms and electrooculograms we
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The study provides data regarding the relationship between vision performance and age of the individual. It has direct application to pilot visual tasks with respect to instrument panel displays, and to controller visual tasks in association with radar equipment. It also relates to the visual parameter important to the determination of a physiologi
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A wide spectrum of beam and beam-column problems can be described and solved by a single computer method. A finite mechanical analog is employed to allow very general loading and elastic restraint conditions to be considered. The resulting system of equations is solved by a rapid and efficient direct elimination process. Program BMCOL 34 and associ
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A closed-circuit television system now exists for a six-mile section of the Gulf Freeway in Houston, Texas. It permits complete surveillance of the traffic flow as well as the expedient handling of accidents or stalled vehicles on the freeway. The television monitors are housed in the central control center. Data on the operation of the Gulf Freewa
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Studies by the Texas Transportation Institute aimed at the development of safer roadside sign supports have been conducted since 1963. These studies sponsored by the Texas Highway Department in cooperation with the U. S. Bureau of Public Roads led to the concept of a break-away sign support. By early 1965, the phenomenological behavior of the break
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An analysis of physician flight accidents during the period 1964-1965 is presented. More than thirty physicians sustained fatal injuries while piloting light aircraft: a fatality record four times the ratio of physician pilots in the general aviation pilot population.
Failure of adaptation of nystagmic eye movements to occur under certain conditions of stimulation by angular acceleration has been ascribed to a failure to allow the eye-movement response to run its course. In this study, 3 groups of subjects were tested under conditions of repeated angular accelerations in which Group A received unidirectional sti
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Visual judgments of size, distance, slant, etc. in the flying situation are often made under reduced cue conditions, especially during night flying. In the experimental study of spatial perception under these conditions, experiments often require long sessions in the dark and involve stimuli of low luminance allowing considerable dark adaptation to
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The use of inadequate or incomplete body restraint systems is a major factor in the current trend of increasing serious and fatal type injuries reported from general aviation accidents. An analysis of these accident injuries and conditions clearly indicates that the use of a seat belt without additional upper body restraint cannot provide adequate
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A significant number of fatal general aviation accidents have definitely been associated with the effects of consumed alcohol. These effects can markedly impair the judgment and proficiency of airmen. Aspects of this subject are explored in depth.
A new device which is small, completely self-contained, and which is not susceptible to tumbling, is evaluated. The results indicate that it will enable controlled flight under complete loss of outside visual reference (IFR) conditions. Since no electrical, vacuum or mechanical activation sources are required, the Kenyon instrument can be used in a
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An elementary device, actuated by the conventional stall warning vane, is described which can be inexpensively installed in any aircraft. The new device, the Stall Barrier, prevents stalls through (1) warning the pilot through the 'touch sense' of the impending stall, and (2) taking corrective action for the pilot. Short-field take-offs, slow fligh
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