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Showing 35861 - 35880 of 36747 results
  • Environmental impact case study Route 220 Fincastle to Eagle Rock Project 0220002106
    Environmental impact case study : Route 220, Fincastle to Eagle Rock : Project 0220-002-106.
    Schafer, Scott ;
    Walton, L. Ellis
    1971-01-01 | PDF
    At the request of the Environmental Quality Division, the Environmental and Economics Section of the Virginia Highway Research Council conducted a study to determine the probable socioeconomic and environmental impact of the proposed dual-laning of Route 220 between Fincastle and Eagle Rock. This evaluation was a part of the Highway Department's ef ...
  • Performance of Single and Double Sills for Steep Circular Culverts
    Performance of Single and Double Sills for Steep Circular Culverts
    Rao, Manam V. P. ;
    Brandes, Robert J.
    1971-01-01 | PDF
    The hydraulic performance of steep sloped circular culverts was investigated experimentally using 18-inch diameter corrugated metal and concrete pipe culvert models of different geometrical configurations. One of the effect means found to dissipate the energy of supercritical flows in steep culverts was to force a hydraulic jump to form inside of t ...
  • Community and environmental impact of highway investment decisions
    Community and environmental impact of highway investment decisions.
    Lewis, James E ;
    Walton, L. Ellis,
    1971-01-01 | PDF
    The primary objectives of this study were (1) to determine the state of the art of procedures for the investigation and evaluation of the community and environmental impact of investments in highway facilities, (2) to develop in detail those investigative and evaluative procedures for use by the Virginia Department of Highways, and (3) to establish ...
  • Statistical methods for the quality control of steam cured concrete final report
    Statistical methods for the quality control of steam cured concrete : final report.
    Brown, H. E
    1971-01-01 | PDF
    Concrete strength test results from three prestressing plants utilizing steam curing were evaluated statistically in terms of the concrete as received and the effectiveness of the plants' steaming procedures. Control charts were prepared to show trends in the data, the batch-to-batch variability of the strengths for both the 28-day moist cured and ...
  • Experimental flexible pavements
    Experimental flexible pavements.
    McGhee, Kenneth H
    1971-01-01 | PDF
    A program of construction and the performance evaluation of three major Virginia experimental flexible pavements is reported. The objective of the program was to evaluate the performance of pavements incorporating new or timely design concepts and to assess the feasibility of these concepts for further use. Among the major findings of the study are ...
  • Driving records of persons 65 years of age and older are insurance rate reductions warranted
    Driving records of persons 65 years of age and older : are insurance rate reductions warranted?.
    Simpson, Clinton H
    1971-01-01 | PDF
    There are many elements that constitute the makeup of the automobile insurance premium, the major ones being age, sex, marital, status, and the utilization of the automobile. While the biological aging process places health limitations on drivers age 65 and older, which in turn affect their driving performance and safety, they nevertheless experien ...
  • A manual for conducting environmental impact studies
    A manual for conducting environmental impact studies.
    Walton, L. Ellis ;
    Lewis, James E
    1971-01-01 | PDF
    This report suggests methodologies which should enable an interdisciplinary team to assess community values. The methodologies are applicable to the conceptual, location, and design phases of highway planning, respectively. The approach employs a weighted value technique for comparison of the monetary, quantifiable and qualitative factors of altern ...
  • Comparison of properties of fresh and hardened concrete in bridge decks
    Comparison of properties of fresh and hardened concrete in bridge decks.
    Newlon, Howard
    1971-01-01 | PDF
    A study was made on 17 bridge decks constructed in 1963 under regular construction procedures. The purpose was (1) to compare important properties of concrete as freshly placed in randomly selected bridge decks with those after hardening of the concrete, (2) to detect the influence, if any, of different screeding methods, and (3) to relate the perf ...
  • An algebraic equation solution process formulated in anticipation of banded linear equations
    An algebraic equation solution process formulated in anticipation of banded linear equations.
    Endres, Frank L. ;
    Matlock, Hudson
    1971-01-01 | PDF
    A general method for the solution of large, sparsely banded, positive-definite, coefficient matrices is presented. The goal in developing the method was to produce an efficient and reliable solution process and to provide the user-programmer with a package which is problem-independent, efficient, and easy to use, so that program development time ca ...
  • Subgrade evaluation based on theoretical concepts
    Subgrade evaluation based on theoretical concepts.
    Vaswani, N. K
    1971-01-01 | PDF
    Evaluations of pavement soil subgrades for the purpose of design are mostly based on empirical methods such as the CBR, California soil resistance method, etc. The need for the application of theory and the evaluation of subgrade strength in terms of the modulus of elasticity in place of empirical methods is essential for rational design techniques ...
  • Design of secondary and subdivision roads in Virginia based on thickness equivalency values
    Design of secondary and subdivision roads in Virginia based on thickness equivalency values.
    Vaswani, N. K
    1971-01-01 | PDF
    The design of secondary and subdivision roads in Virginia is based on the design charts recommended by the Highway Department. In view of recently gained knowledge of materials and design techniques, the Pavement Research Advisory Committee requested that a new design procedure for these roads be developed. In the proposed design developed, the soi ...
  • Citizen participation in public hearings in Virginia
    Citizen participation in public hearings in Virginia.
    Walton, L. Ellis ;
    Saroff, Jerome R
    1971-01-01 | PDF
    No Description
  • A Grouping Procedure for ATRs 1971
    A Grouping Procedure [for ATRs] (1971)
    United States. Federal Highway Administration
    1971-01-01 | PDF
    No Description
  • A study of girder deflections during bridge deck construction final report
    A study of girder deflections during bridge deck construction : final report.
    Hilton, Marvin H
    1971-01-01 | PDF
    Problems involved in obtaining the desired thickness of bridge decks were investigated. The study, which was limited to decks which were longitudinally screeded during construction, included (1) field measurements of the girder deflections during construction, and (2) a theoretical frame analysis of the girder deflections under the field loading co ...
  • Bridge deck performance in Virginia
    Bridge deck performance in Virginia.
    Davis, James ;
    North, Michael
    1971-01-01 | PDF
    One of the most comprehensive programs for the evaluation and definition of the performance of concrete in bridge decks was that undertaken cooperatively by the Portland Cement Association, the Bureau of Public Roads, and eight states distributed throughout the United States. Detailed studies of a few bridges were made in four states and surveys we ...
  • A study of accidents involving highway bridges
    A study of accidents involving highway bridges.
    Hilton, Marvin H ;
    Redick, J. R.,
    1971-01-01 | PDF
    Accident reports, field evaluations, state police and highway engineer questionnaire replies, and other data sources were used to conduct a general study of accidents involving highway bridges in Virginia. The bridges included in the study were divided into three groups. These were: (a) Arterial and primary system bridges, (b) interstate system bri ...
  • Evaluation of epoxy compounds as a material for patching and protecting concrete final report
    Evaluation of epoxy compounds as a material for patching and protecting concrete : final report.
    McKeel, Wallace T
    1971-01-01 | PDF
    The final report summarizes the results of a study of the use of epoxy compounds in the shallow surface repair and sealing of concrete bridge decks. The research effort concentrated on the use of epoxy resin systems as bonded overlays and included evaluations of test strips of seven materials on two structures in Northern Virginia, supplemented by ...
  • A Systems Analysis of Rigid Pavement Design
    A Systems Analysis of Rigid Pavement Design
    Kher, Ramesh K. ;
    Hudson, W. Ronald
    1971-01-01 | PDF
    Design of portland cement concrete pavements is a complex procedure involving the evaluation and analysis of numerous variables. A wide variety of variables within the broad categories of loads, environments, material properties, maintenance, progressive failure, and economics must be considered in an ideal design procedure. Concrete pavement and o ...
  • A loading history study of two highway bridges in Virginia final report
    A loading history study of two highway bridges in Virginia : final report.
    McKeel, Wallace T
    1971-01-01 | PDF
    An evaluation of the stress ranges in two typical highway bridge spans under service loadings was made in a cooperative study by the Virginia Highway Research Council and the Federal Highway Administration. The strains at selected points on the superstructure elements of the spans were recorded continuously for periods of four and five days under n ...
  • Seasonal Variations of Pavement Deflections in Texas
    Seasonal Variations of Pavement Deflections in Texas
    Poehl, Rudell ;
    Scrivner, Frank H.
    1971-01-01 | PDF
    Seasonal variations in the strength of flexible pavements are known to influence their service life, especially in the northern United States and Canada. Less is known regarding seasonal effects in a milder climate such as that of Texas. This study was undertaken in an attempt to determine where and when, in Texas, such variations exist, what their ...
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