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.
In April 1975, the American College of Cardiology held its Eighth Bethesda Conference Conference on Cardiovascular Problem in Aviation Safety.Perhaps the most meaningful purpose of this meeting was to make clear, in a structured fashion, the availability and pertinence of noninvasive and invasive methods of testing to ensure early identification of
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The feasibility of using wastewater sludge on highway rights-of-way as a substitute for fertilizers was evaluated using the following constraints- (1) environmental restrictions; (2) public health restrictions; (3) programs that must be implemented to meet both environmental and public health safeguards; and (4) potential cost savings to the Virgin
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A study was made of the practice of "scratching" the surface course of several new construction projects in Virginia. It was found that sections with the surface course placed in one lift produced a road roughness value of about 3 in./mile higher than comparable sections which had the surface course split. Conversely, the single lift surface course
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Based on the results of this investigation in which the longest steam curing time was 72 hours, it was concluded that increasing the curing times did not adversely affect the strength of the concrete. However, at the later stages of steam curing, gains in strength were smaller than at the earlier stages. Specimens steam cured for durations beyond 2
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Prior to 1932, road maintenance and construction in Virginia were largely the responsibility of the individual county governments. Bridge construction projects, based on local requirements, formed a natural part of these activities. Local responsibility very often resulted in a rich variety of bridge designs built by an equally diverse group of bri
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This report presents the results of an evaluation of the 5.8-mile fog guidance light system on I-64 across Afton Mountain. It is a companion to "Interim Report No. 3, Evaluation of Pavement Edge Inset and Low Level Illumination Lights in Fog," which gave the results of an evaluation of the 0.5-mile, semipermanent test section of lights installed in
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A comprehensive field test was conducted on a highway truss bridge in Allegheny County, Virginia, in July 1974. All typical truss members as well as structural members of the bridge floor system were instrumented and unit strains measured when the structure was loaded with a 3-axle tractor trailer weighting 78,000 lb. placed in incremental position
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A 60-foot non-composite steel beam and concrete deck highway bridge span over the Shenandoah River on Route 7 in Clarke County was tested with a 23-ton, tandem axle test vehicle in July1975. Strain gages were placed near midspan on the lower flanges, the webs and the upper flanges of the steel stringers (W36 x 150) and in one position on the unders
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This report summarizes the findings of the litter survey for highways, urban areas, and recreational areas as specified in the "Virginia Litter Control Act". Litter samples from 61 highway sites, 11 urban sites, and 10 recreational sites geographically distributed throughout the state were obtained and sorted into categories as indicated in Table 1
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This manual details the preparation of data for and the interpretation of output from the least squares computer program LSTSQR-1. The material presented here will be somewhat difficult for the non-computer oriented professional to interpret on the first reading. However, the professional researcher should find after an initial reading, some consul
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A model of the bearing assembly specified on the plans for the bridges being constructed in Norton, Virginia, was prepared in the laboratory at the Research Council. The shielded metal-arc welding process was used to weld the soleplate to the metal insert. The electric arc, varying from 175-225 amps, and several 5/32 inch E6010 electrodes were used
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Reported are studies of the effectiveness of a 4-inch (100 mm) wide compressible material installed at 1,000-ft. (305 m) intervals in a jointed, reinforced concrete pavement in reducing pavement blowups. The studies were made on an Interstate highway carrying some 30,000 vehicles per day, including approximately 7,000 trucks and buses. The study co
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This report examines the performance of the source strength model presented in the U.S. Environmental Protection Agency publication AP-42, Supplement 5 relative to field data gathered during the AIRPOL project and relative to the previous source strength model, AP-42, Supplement 2. The report demonstrates that the Supplement 5 model can be expected
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The deteriorating financial conditions and service levels of both public and private transit systems in Virginia's small urban areas have led the operators of these systems to question the desirability of continuing to operate them in their present forms. With many 40-50 passenger vehicles being operated at less than half capacity for extended peri
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A survey of individuals relocated by the Department due to the acquisition of right-of-way for highway construction was made in each of the eight construction districts. Also, a statewide statistical summary of results and of respondent characteristics was compiled. For each district the socioeconomic profile of respondent households was prepared.
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