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.
The fold-up method of concrete construction is a relatively new method of precasting a variety of structural shapes on a single flat surface and then folding portions up to form a three-dimensional shape. Structural members as beams, girders, columns, piers, footing, and retaining walls all having applications in bridge or building construction may
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Scores on the American Optical Company (AOC) test (1965 edition), Dvorine test, Farnsworth Lantern test, Color Threshold Tester, Farnsworth-Munsell 100-Hue test, Farnsworth Panel D-15 test, and Schmidt-Haensch Anomaloscope were obtained from 137 men with color-defective vision and 128 men with normal color vision. The validity of each of these test
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The medical records of airmen involved in midair collisions from 1970 through 1973 were reviewed and compared with two other groups of pilots: (1) pilots involved in other types of accidents and (2) pilots without any accident records. There is nothing in the results to indicate that the pilots with visual corrections are a greater risk.
The medical records of airmen involved in midair collisions from 1970 through 1973 were reviewed and compared with two other groups of pilots: (1) pilots involved in other types of accidents and (2) pilots without any accident records. There is nothing in the results to indicate that the pilots with visual corrections are a greater risk.
Forty-five male subjects performed a simulated air traffic control radar task for 1 hour. Subjects were equally divided into three time-of-day groups and tested at 1000, 1300, and 1530. The subject's task was to respond as rapidly as possible to infrequent changes in alphanumeric symbols. Physiological recordings of blood pressure, oral temperature
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Fifteen male paid volunteers (ages 20 to 28) were studied in three groups of five each. The first 4 days of the experiment they slept nights (2230 to 0600( and worked days. On the fifth night, they slept only 3 hours (2100 to 2400) before starting a 10-day period in which the wake-sleep cycle was altered by 12 hours. According to the subjective fat
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Marihuana, or its principal active ingredient, delta-9-tetrahydrocannabinol (delta9-THC), impairs performance on complex behavioral tasks in animals and man. Although there exists some evidence that altitude-induced hypoxia potentiates the physiological effects of marihuana, the interaction between altitude and marihuana on behavioral tasks has not
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This report covers two aspects of an agency-wide assessment of the FAA Management Training School (MTS) program. The first part of the report considers the evaluation of MTS by approximately 10% of the Supervisory and Managerial Training Course graduates. It was found that supervisors and managers held similar views of MTS: Most felt that the progr
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Stress in 23 air traffic controllers (ATCS) at Atlanta Air Route Traffic Control Center (ATL) on the straight 5-day shift rotation schedule was compared with stress in 23 ATCS's on the 2-2-1 shift rotation schedule at Fort Worth Air Route Traffic Control Center (FTW). Stress in six other FTW ATCS's on the 5-day schedule was compared to stress in th
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The purpose of this report is to disseminate information and ideas which, hopefully, will be of some value formulating an opinion concerning development of the coal, water and related land resources of southwestern North Dakota.
The techniques of collecting detailed traffic data for a given site are well known. A popular method uses chart recorders in combination with various vehicle sensing devices, such as tape switches, to provide an accurate pictoral display of the traffic flow, The human effort required to decipher these "pictures" is typically equal to or greater tha
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The densities of subgrade soil at various locations throughout the state were determined using the different model nuclear gages owned by the Department. In addition, some laboratory testing and sand cote testing were carried out. It was concluded that the direct transmission-standard mode of nuclear density determination could replace the presentl
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Of the four acids tested in the laboratory, the nitric and hydrochloric types were selected for field experiments. These two acids performed about equally well, the choice as to which to use is dictated by price and availability. In the field experiments it was found that the application of acid raised the skid resistance by 15 skid numbers, which
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This report describes the experimental and analytical study of a rigid frame highway bridge conducted under the auspices of the Federal Highway Administration and the Virginia Highway & Transportation Research Council. Data collected during the experimental phase provided measures of strains and deflections at midspan of selected girders and strain
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The research reported here was undertaken to determine the feasibility of using raised pavement markers on interstate off-ramps in such a configuration that the driver will be alerted as a result of viewing an unexpected phenomenon. The results of this preliminary investigation show that the raised pavement marking system, consisting of a pattern o
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The state of Virginia has a unilateral traffic records system whereby localities are compelled by law to provide law enforcement information to the state without any assurance that usable information will be returned to the localities. This situation has forced localities to develop and maintain their own traffic records systems to satisfy state re
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Permanent forms for bridge decks have become increasingly more attractive to the construction industry in recent years. Many highway officials however, have reservations concerning the use of permanent steel forms. These reservations are related to the effect the forms might have on the durability of the concrete decks and to the possibility of fut
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New pavement marking materials and systems are continuously being introduced with claims of improvements in durability and reflectivity, as well as cost advantages. Because of the potential for savings through the use of a new system of pavement striping utilizing traffic paint and a sand/bead mixture, research was undertaken to compare the system
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