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.
Visual acuity was determined at the intermediate range for older individuals with various combinations of ocular refractive error (nine subcategories) and accommodative power (three subcategories). Subjects (N=249) read numerals ranging in size to measure visual acuity from 20/80 to 20/15 at 51, 76, and 102 cm (20, 30, and 40 in) with 50 fL luminan
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Louisiana's Office of Highways reacts to a major problem when it attempts to shape and control drainage patterns along its right-of-ways. The Office's design engineers meet this challenge through proper section design and appropriate application of drainage structures.Perhaps the most common structure that these design engineers use is the drainage
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This report presents a preliminary evaluation of park-and-ride facilities. A literature review was conducted and, from this, characteristics of park-and-ride service in the United States were documented. Also, each Texas city providing park-and-ride service was surveyed, and the existing or projected park-and-ride operations in five Texas cities ar
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Texas Transportation Institute. Texas A&M University
1977-03-01
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In this report the Texas Transportation Institute (TTI) compares the relative performance of sand-asphalt-sulfur pavements and a deep asphalt concrete pavement. Elastic and fatigue properties of the sand-asphalt-sulfur pavement materials were studied in considerable detail over a period of years. The material moduli and fatigue properties were used
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Data obtained from sleep logs maintained for a period of 5 weeks by 185 air traffic controllers indicate that on a weekly basis there is no significant difference in the amount of sleep obtained by controllers working the 2-2-1 rotation pattern and that obtained by those on the 5-day rotation pattern. Controllers working the 2-2-1 rotation pattern
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A projection of the form and direction that the U.S. transportation system will take over the next 25 years has been made as a foundation for the development of a national transportation policy, but the report is not itself written as a plan of action. Detailed are the choices faced by Americans in dealing with their dominant taxpayer-financed high
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Virginia is one of seven state and federal agencies participating in a field evaluation of a stripping test method developed under NCHRP Project 4-8 (3), "Predicting Moisture- Induced Damage to Asphaltic Concrete." The test method is being used to evaluate the efficacy of the method in predicting the degree of stripping that will occur on a 1,000 f
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The 1973 AASHTO Standard Specifications for Highway Bridge introduced the requirement that "In no case shall an exterior stringer have less carrying capacity than an interior stringer." This statement resulted from the concern that many original exterior stringers became interior stringers when bridges were widened. Since current specifications are
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An index to Office of Aviation Medicine Reports (1964-1976) 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 1976 by year, number, author, title, and subject.
This report analyzes the historical patterns of bus transit operations from 1960 to 1974 using data from 50 bus operations. Because of limitations on the available data, the analyzed data do not represent the universe of bus operations, nor is it a random sample, and therefore do not necessarily represent the industry. However, the trends in this s
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A number of energy crisis related factors were examined to determine if a change in energy crisis variables occurred during the 1973-74 shortage and if this change could be related to changes in the accident environment in Virginia. The variables examined in the study included mean speed, speed distribution, travel, vehicle mix, visibility (dayligh
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