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.
Previous studies of binaural hearing suggested that speech sounds are less resistant to masking than are nonspeech sounds; experiments demonstrated that, when the nonspeech sounds are given a message to convey, they act more like speech. Earlier research showed that when subjects are deprived of vision, their walking behavior can be changed by pres
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There are three prominent models of test fairness in the dichotomous situation:(a) Thorndike's Constant Ratio model (the ratio of the proportion successful to the proportion selected should be equal for the majority and the minority group);(b) Darlington's Conditional Probability model (the probability of selection, given that an individual is succ
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The Giles and Elliot discriminant functions diagnosing sex and race from cranial measurements were tested on a series of forensically examined crania of known sex and race. Of 52 crania of known sex, 46 (88%) were correctly diagnosed. Racial diagnoses were correct in 30 (71%) of 42 crania of known race. Analysis of the facial data indicates that mo
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An index to Office of Aviation Medicine Reports (1964-1978) and Civil Aeromedical Research Institute Reports (1961-1963) is presented as a reference for those engaged in aviation medicine and related activities. It provides a listing of all FAA aviation medicine reports published from 1961 through 1978 by year, number, author, title, and subject.
This annual report consists of three parts, as follows: (1) Results of Primary Roads Cultural Resource Surveys - July 1, 1978 - June 38, 1979; (2) Results of Secondary Roads Cultural Resource Surveys - July 1, 1978 - June 30, 1979; and (3) Results of Urban Systems Cultural Resource Surveys - July 1, 1978 - June 30, 1979.
In general, there was little evidence that the public information countermeasure was effective in increasing awareness or overall knowledge, or in improving attitudes. The major exceptions to this were the self-reported increase in bystander intervention and self-reported decrease in drinking and driving.
From a review of some of the possible methods of conserving energy in the operation of roadway lighting, with due consideration being given to traffic operations and safety under the current energy scenario, it was concluded that the most favorable conservation measure would be to replace the existing mercury vapor luminaires with the more energy-e
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This report discusses the construction and initial condition of the Virginia Department of Highways and Transportation's first three bridges built with glulam panels on steel stringers. The data show that superstructures with glulam deck panels are more expensive than the conventional alternative of solid plank on steel stringers. It is felt that i
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During the 3-year period from 1974-77, several problems were noted throughout the Pacific Northwest during and after construction of asphalt pavements. These include incompactible mixes, slow setting mixes, flushing mixes, low mix cohesion, and early thermal cracking. This paper reports on attempts to assess and determine those factors most affecti
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The report summarizes studies directed at developing guidelines for controlling the use of partially completed pavements by heavy construction equipment. It is shown that the damaging effects of flotation tires may be analyzed in the same manner as those of conventional dual tires, and that the AASHTO traffic equivalencies for such dual tires are a
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In October and November of 1978, the Virginia Department of Transportation Safety sponsored a statewide public opinion poll conducted by the Virginia Highway and Transportation Research Council. From the first of October through the fifteenth of November, approximately 2,000 randomly selected Virginia families were called and a member of each house
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