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.
Since the collapse of the Silver Bridge into the Ohio River, the enactment of the Federal Aid Highway Act and a marked increase in national concern for the safety of the traveling public, highway departments throughout the country have directed much more attention to the problem of Bridge Maintenance Inspection.A comprehensive bridge inspectors tra
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The purpose of this study was to evaluate the erosion inhibiting potential of nine commercial spray on plastic chemicals. All chemicals were also compared with the conventional method of straw tacked with an asphalt emulsion, and with untreated soil. In each case costs of the chemicals were obtained to determine if the most effective chemicals were
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Presented is a direct tensile test for measuring the bond of rock or mineral surfaces to portland cement paste, or for measuring the tensile strength of neat paste or of mortar specimens, devised using commercially available gripping devices and preparation equipment. The method of specimen preparation and testing permits the sample to be totally i
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This report presents an assessment of the impact of a proposed section of Interstate 66 on the quality of the air in the immediate area of the project and in adjacent areas. The proposed project begins with an extension of existing I-66 at the interchange on I-495 in Fairfax County, passes through Arlington County, and terminates near the Key Bridg
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The method of selective solution by methanolic maleic acid, developed by Tabikh et. al for the determination of cement content in hardened concrete, was evaluated. It was found to be relatively simple and inexpensive, and is accurate to within ±1 percentage point cement at the 95% confidence level with the use of calibration curves. Such factors as
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This publication brings together annual series of selected statistical tabulations relating to highway transportation in three major areas: (1) Highway use-the ownership and operation of motor vehicles; (2) highway finance - the receipts and expenditures for highways by public agencies; and 13) the highway plant - the extent and changing characteri
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This is a book of activities designed for students in grades four through seven. Its purpose is to show them the importance of safety belts and to encourage them to use, and encourage others to use, this essential safety device. The activities range from the simple to the complex, the simple for younger children or slow learners, the complex for ol
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A study of urban traffic operations was conducted on the Gulf Freeway in Houston. The study investigated those areas which give greatest promise for immediate implementation to relieve traffic congestion· and to improve safety for the largest number of urban motorists. The major areas of study were: traffic control, detection and clearance of disab
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This report describes a vehicle crash test on a mile post marker. The vehicle was a sedan weighing 3400 lbs. and was towed into the mile post marker at 43.9 mph. The mile post marker, proposed for use on interstate highways, consisted of a 1 ft. by 4 ft. sign panel mounted on a 2 in. standard pipe 8 ft. high with a threaded coupling as a breakaway
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1972-01-01
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U.S. Department of Transportation Annual Reports
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PDF
Submitted in compliance of Section 11 of the Department of Transportation Act, the fifth annual report of the Department of Transportation deals with the Department's achievements during Fiscal Year 1971.
Design of flexible pavement is a complex procedure involving numerous variables. The systems approach can be considered as the best method for solving design problems. An important part of any pavement design system involves upgrading it in order to include the best possible technology. One of the distress mechanisms included in the conceptual flex
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This report is a sequel to a previous one that gave the details of a computer program capable of calculating in situ values of the Young's moduli of a pavement-subgrade (two-layer elastic) system from surface deflections measured at two points located at specified distances from the load wheels of a Dynaflect. The present report describes the effec
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The purpose of the specification documented in this report is to define the performance requirements of the standard vehicle--a forty foot transit coach--intended to revitalize urban bus fleets over the near-term future. The specification defines the function the vehicles are designed to perform, sets out performance requirements, defines the inter
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