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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.

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Showing 33201 - 33220 of 35438 results
  • Transportation data requirements an evaluation of manual traffic counts on primary highways
    Transportation data requirements : an evaluation of manual traffic counts on primary highways.
    Jordan, Robert F
    1979-01-01 | PDF
    The purpose of this study was twofold: (1) to examine the working practices followed in obtaining manual traffic counts on primary highways in Virginia, and (2) to evaluate the accuracy of the counts. The former was achieved by observing and interviewing personnel conducting traffic counts at 26 stations, statewide; for the latter, the results of m ...
  • Sidewalk undermining studies phase III field and model studies
    Sidewalk undermining studies : phase III, field and model studies.
    Plott, Harold W
    1979-01-01 | PDF
    The results of the early studies of the undermining problems are summarized in the initial portion of this report. Additionally, the design and use of a model sidewalk for testing procedures for preventing undermining are described. Based upon tests with the various model setups the following conclusions are made: 1. Close to maximum compaction of ...
  • A review of Virginias traffic records project and some recommendations for action
    A review of Virginia's traffic records project and some recommendations for action.
    Kelsh, William E
    1979-01-01 | PDF
    In an attempt to increase the utility and efficiency of Virginia's traffic records system the Commonwealth has conducted several studies of its activities related to the collection, processing, storage, distribution, and use of accident data. Collectively these efforts are referred to as Virginia's traffic records project. This report reviews the h ...
  • Energy research at the Virginia Highway and Transportation Research Council
    Energy research at the Virginia Highway and Transportation Research Council.
    Halstead, Woodrow J
    1979-01-01 | PDF
    No Description
  • A survey of elderly and handicapped riders on the Charlottesville transit system
    A survey of elderly and handicapped riders on the Charlottesville transit system.
    Arnold, E. D
    1979-01-01 | PDF
    This report develops a profile of the elderly and handicapped public transit rider in the city of Charlottesville, Virginia, population 40,800. A compilation of socioeconomic and trip-making characteristics determined from a mail-out survey of elderly and handicapped transit users is presented. These characteristics are also compared with character ...
  • Evaluation of treated wooden sign posts
    Evaluation of treated wooden sign posts.
    Blackwell, Steve
    1979-01-01 | PDF
    In view of the Virginia Department of Highways and Transportation's need to conserve dwindling revenues, the Traffic Research Advisory Committee recommended that the feasibility of using unpainted, treated wooden sign posts instead of painted posts be investigated. With the subsequent change to the use of unpainted, treated wooden sign posts, the A ...
  • An analysis of the 1978 Charlottesville onboard bus survey
    An analysis of the 1978 Charlottesville on-board bus survey.
    Duncan, Kathy
    1979-01-01 | PDF
    Since the city of Charlottesville began operating its bus service in September 1976, there has been a 20% increase in patronage. City officials were interested in determining the reasons for the increase and any changes in the characteristics of the riders. Data from an on-board survey pointed to an increase from new riders rather than an increase ...
  • Litter survey status report 2
    Litter survey : status report 2.
    Runkle, Stephen N
    1979-01-01 | PDF
    This report discusses the results of three series of litter pickups at twenty 0.1-mile long sites on Virginia highways 4 sites on the interstate system, and 8 each on the primary and secondary systems. This study is a continuing effort to monitor quantities of litter and is considered the best approach available short of extensive survey sampling t ...
  • Aid to private transportation providers a working paper
    Aid to private transportation providers : a working paper.
    Allen, Gary R
    1979-01-01 | PDF
    This working paper was prepared for the Public Transportation Division. Within the three-week period in which it was prepared, little more than a cursory examination could be made of the number of private providers operating in Virginia; however, the author did raise a number of pertinent questions about subsidizing them.
  • Toward a rational appraisal of highway cost allocation a position paper
    Toward a rational appraisal of highway cost allocation : a position paper.
    Allen, Gary R
    1979-01-01 | PDF
    In addressing the issue of cost allocation, the author asked if there was a reasonable case for an analysis of highway cost allocation in Virginia, and, if so, what could be learned from the literature about an appropriate methodology.
  • Procedures for increasing the use of car pools for work trips
    Procedures for increasing the use of car pools for work trips.
    Hoel, Lester A ;
    Austin, John K
    1979-01-01 | PDF
    This report describes methods and techniques that could be used to increase the use of car pools in Virginia. Two approaches are described. The first employs those methods that serve as an incentive for persons to form car pools, such as preferential use of street and highway facilities, parking privileges, etc. The second involves methods that ass ...
  • Evaluation of noise barriers
    Evaluation of noise barriers.
    Haviland, J. K ;
    Noble, David F
    1979-01-01 | PDF
    Noise measurements were taken at six barrier sites: two wooden, two metal, and one concrete barrier were studied; the sixth site had no barrier and was studied to determine the ground effect. The approach was to determine insertion losses by taking simultaneous measurements behind the barrier at different elevations over the same point. In this pro ...
  • Design of bituminous mixes with high skid resistance
    Design of bituminous mixes with high skid resistance.
    Maupin, G. W
    1979-01-01 | PDF
    Certain highway locations need exceptionally high skid resistance because of the alignment, geometry, and drainage of the roadway and the complex turning maneuvers required. Several beam specimens made of bituminous mixes incorporating unconventional aggregates with physical characteristics likely to produce high skid resistance were installed in a ...
  • Use of local sands on Eastern Shore
    Use of local sands on Eastern Shore.
    Hughes, Charles S
    1979-01-01 | PDF
    In August 1977, after field installations on Rte. 617 had been in service for 16 years, a performance survey was made. At that time, the road was scheduled for resurfacing. The results showed that the Eastern Shore sands could provide durable, economical asphalt mixes when a small amount of imported filler material was added, and that with the incr ...
  • A highway advisory radio for construction and maintenance operations
    A highway advisory radio for construction and maintenance operations.
    Shepard, Frank D
    1979-01-01 | PDF
    The Virginia Department of Highways and Transportation utilized an advisory radio to advise motorists of possible delays caused by resurfacing operations on a major interstate highway and to give information concerning the use of an available detour. This report describes an evaluation of the effectiveness of the radio unit on the basis of the use ...
  • Bituminous mixes incorporating blended aggregates
    Bituminous mixes incorporating blended aggregates.
    Hughes, Charles S ;
    Mahone, David C
    1979-01-01 | PDF
    This report describes the skid performance after four years traffic of several experimental sections containing from 0% to 36% nonpolishing aggregate blended with #10 limestone aggregate. A 1978 installation of an I-2 Modified (30/70) blend employing 30% #68 nonpolishing aggregate and 70% #10 limestone is also discussed. Finally the anticipated 197 ...
  • Petrographic examination of carbonate aggregate prism specimens treated with chemical solutions normally occurring in Portland cement concrete
    Petrographic examination of carbonate aggregate prism specimens treated with chemical solutions normally occurring in Portland cement concrete.
    Walker, Hollis N
    1979-01-01 | PDF
    The original rock prism specimens were prepared and the early length change data were taken as part of a Federal Highway Administration project on the behavior of carbonate aggregates in concrete. It had been shown that the length changes of the aggregates bore a direct relationship to the pH of the solution in which they were tested. The present s ...
  • The use of audiovisual aids in the relocation program
    The use of audiovisual aids in the relocation program.
    Perfater, Michael A
    1979-01-01 | PDF
    The report presents the findings of a study of an audiovisual slide presentation on the rights and benefits of persons relocated as a result of highway construction. The overall purpose of the study was to evaluate the audiovisual system used by the Bureau of Relocation of the Maryland State Highway Commission for eventual use by the Right-of-Way D ...
  • Sidewalk undermining studies final report
    Sidewalk undermining studies : final report.
    McGhee, Kenneth H
    1979-01-01 | PDF
    The report summarizes some five years of studies on the highly expensive sidewalk undermining problem which plagues the Northern Virginia area. Included are studies of sidewalk replacement techniques, of the soils and geometric conditions contributing to undermining, and of the methods of ensuring that newly constructed sidewalks will be free of un ...
  • Installation of raised pavement markers for reducing incidences of wrongway driving in snowplow regions
    Installation of raised pavement markers for reducing incidences of wrong-way driving in snowplow regions.
    Shepard, Frank D
    1979-01-01 | PDF
    Recently completed research had proven the feasibility of using raised pavement markers to alert wrong-way drivers to their errors. In that research, however, the raised markers had been placed only in areas where-snowplowing was not a problem; therefore, the research described in the present report was undertaken to determine if problems would be ...
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