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.
As part of the Fairfax Alcohol Safety Action Project (ASAP), staff members of the Virginia. Highway and Transportation Research Council, acting in their role as evaluators of the project, have conducted four nighttime roadside surveys in Fairfax, Virginia.. A baseline survey was conducted in January 1972 prior to the start of ASAP operations (Febru
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A program of construction and performance evaluation of seven Virginia flexible pavements containing at least some experimental features is reported. The objective of the program is to evaluate the performance of the pavements incorporating new or timely design concepts and to assess the flexibility of these concepts for further use. Among the majo
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The conception, calibration, and evaluation of alternative disaggregate behavioral models of the express bus-fringe parking travel choice situation are described. Survey data collected for the Parham Express Service in Richmond, Virginia, are used to define the service market area and to construct binary and n-dimensional choice models. The perform
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The laboratory and field trapping efficiencies of several types of flow barriers were ascertained. The materials used to fabricate the barriers were various types of hay straw crushed stone and crushed stone/straw mixes. Field checks of systems of battlers have indicated that flow barriers placed by the contractor have a near zero average efficienc
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Tripmaker reactions to two recent express bus-fringe parking operations in Richmond and Norfolk-Virginia Beach Virginia are examined. This travel behavior's interpreted to establish planning and design guidelines for locating and designing fringe lots and establishing operational policy for associated bus services. A market area for each service is
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The purpose of this report is to provide a general outline of the automated data systems work under way at the Research Council. Included is a discussion of file contents, automated procedures, and outputs provided. In addition, a time schedule for implementation of the systems under development along with target dates for future reports are provid
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This report discusses the various types of fatigue tests, grouped by the type of specimen (beam, plate, Marshall, etc.) used. The discussion under each type of specimen covers the test, and the analytical methods used in evaluating the data. The test method showing the greatest overall capability was the electrohydraulic control system using a 3 in
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The romance and myths long associated with the covered wooden bridges that once populated the rural roads of the American landscape have produced a multitude of popular literary works on their form, purpose and ultimately demise. Consequently, covered bridges have become something of a symbol of a past era. Similar speculation on the origins and de
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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 formed a natural part of these activities. Local responsibility resulted in a rich variety of bridge designs built by an equally diverse group of bridge companies. The following report on th
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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 formed a natural part of these activities. Local responsibility resulted in a rich variety of bridge designs built by an equally diverse group of bridge companies. The following report on th
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The MacDonald Scabbler is a small, hand held machine suitable for use in cleaning and roughening concrete surfaces, It weighs 308 pounds (140 kg), has 11 cutting heads, and, as a power source, requires a compressor capable of delivering 365 cubic foot of air per minute (cfm) (10.33 m³/min.) at 100 psi (689.48 kPa). The machine was tested in four op
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On-site investigations were made of interchanges in Virginia, some of which had been the site of wrong-way entries and some of which had not, and of intersections that had experienced wrong-way incidents. From the observations made on-site it has been concluded that poor visibility at intersections due to road geometrics and incomplete or improper
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The determination of the elastic, or Young's, modulus, E, of the materials in each layer in an n-layered pavement system given the number, order, thicknesses, and Poisson's ratios of the layers, and the surface load and deflection data, is not possible using the classical theory of elasticity alone. This report develops some assumptions and techniq
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The Data Systems and Analysis Section of the Virginia Highway & Transportation Research Council has been involved for sometime in the development of automated information systems for various types of roadway data. One of these systems, and the system discussed in this report, is the one for the collection, storage, and retrieval of skid data collec
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This study develops general guidelines for planning and evaluating suburban pedestrian systems. Pedestrian characteristics and capabilities which affect walking demand are summarized using the results of previous research. Reported research results are also used to examine the effectiveness of the physical walking system by analyzing various compon
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This report was written primarily for the legislator or researcher assigned to investigate alternative condemnation procedures. It attempted to draw together in one volume enough information to give the reader an appreciation of the problems that can arise in condemnation procedures, and to supply some of the contextual information and comparative
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The objective was to design and test mixes that might satisfactorily be used to replace the asbestos curb mix. Tentatively, it was recommended that a Gilsonite mix be used where high stability was required.
The preparation of accurate air quality analysis portions of highway environmental impact statements requires valid meteorological and air quality data. These data are needed, in part, to determine the regional and local wind patterns on which pollutant dispersion levels are based, which in turn are used in predicting changes in air quality levels
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