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Showing 35081 - 35100 of 36747 results
  • AIRPOL4A An Introduction and Users Guide
    AIRPOL-4A: An Introduction and User’s Guide
    Carpenter, William A., ;
    Heisler, Ronald L.,
    1976-01-01 | PDF
    This report details the mechanics of implementing the computer program AIRPOL-4A. AIRPOL-4A supersedes AIRPOL-4. The upgrade from version 4 to version 4A is a result of the new emissions guidelines contained in Supplement 5 to AP-42, April 1975, by the Environmental Protection Agency. Appendix A details the mechanics of implementing the computer pr ...
  • A New Sensing System for Preexcavation Subsurface Investigation for Tunnels in Rock Masses Volume II Appendices Detailed Theoretical Experimental and Economic Foundation
    A New Sensing System for Pre-excavation Subsurface Investigation for Tunnels in Rock Masses. Volume II. Appendices: Detailed Theoretical, Experimental and Economic Foundation
    Rubin, L. A. ;
    Fowler, J. C.
    1976-01-01 | PDF
    Contents: Theoretical studies-(Alternatives considered for a feasible baseline system, Rock characteristics of significance in tunneling, Range and resolution, Acoustic wave propagation in hard rock, Acoustic sensing system, Ground-probing radar, Electrical resistivity, Signal processing techniques applicable to subsurface investigation of rock mas ...
  • AIRPOL4A algorithms
    AIRPOL-4A algorithms.
    Carpenter, William A.,
    1976-01-01 | PDF
    This report provides a detailed explanation of the inner workings of the computer program AIRPOL-4A, a computer model for predicting the impact of highway generated air pollution. The report is intended to serve both as a supportive document for AIRPOL-4A and as a detailed road map of the program should modifications be required in the future.
  • Truck Traffic Volume and Weight Data for 1971 and Their Evaluation 1976
    Truck Traffic Volume and Weight Data for 1971 and Their Evaluation (1976)
    United States. Federal Highway Administration
    1976-01-01 | PDF
    No Description
  • An evaluation of the movement of 14foot wide manufactured housing units in Virginia a report to the Governor and General Assembly of Virginia
    An evaluation of the movement of 14-foot wide manufactured housing units in Virginia : a report to the Governor and General Assembly of Virginia.
    Parker, Martin R
    1976 | PDF
    In response to House Joint Resolution #41, an evaluation of the movement of 14-foot wide manufactured housing units was conducted on Virginia highways. The purpose of the study was to provide information concerning the transportation characteristics of wide housing units by highway which, along with other data such as economic and societal factors, ...
  • Project FARE Task V Industry Control Board Meeting ICB1
    Project FARE Task V: Industry Control Board Meeting (ICB-1)
    Arthur Andersen & Co.
    1975-12-16 | PDF
    Under Project FARE (Financial Accounting and Reporting Elements, (IT-06-0034), uniform standards, definitions, and procedures for reporting, financial and operating data by the urban transit industry were developed. The objective of this project was to provide a standard system of accounting and reporting information in selected statistical categor ...
  • Engineering Economy and Energy Considerations Alternative Bidding for Pavement Structures and Pavement Components
    Engineering Economy and Energy Considerations: Alternative Bidding for Pavement Structures and Pavement Components
    Brown, James L.
    1975-12-01 | PDF
    The purpose of this report is to discuss ways to receive more economical bids on pavement structures and pavement materials through use of alternative bidding. Throughout this report the term "alternative" will be used to mean either an alternate or an option which the contractor is permitted. Further, an alternate will be used to indicate the case ...
  • Quality control analysis part V review of data generated by statistical specifications on asphaltic concrete final report
    Quality control analysis : part V : review of data generated by statistical specifications on asphaltic concrete : final report.
    Shah, S. C. ;
    Yoches, Veto
    1975-12-01 | PDF
    The primary objective of this study was to review the data generated by projects governed by statistically oriented system of specifications for the control and acceptance of asphaltic concrete and to recommend any revisions that may be deemed necessary. Specifically, the major objectives can be listed according to their order of importance:1. Dete ...
  • Engineering Economy and Energy Considerations Helpful Hints in Highway Cost Estimating
    Engineering Economy and Energy Considerations: Helpful Hints in Highway Cost Estimating
    Ledbetter, W. B. ;
    McFarland, William F.
    1975-12-01 | PDF
    Procedures for estimating project costs within the Department are sophisticated, detailed, and very thorough. From the residency office, through the District office, and finally to the appropriate Division office, each estimate is carefully analyzed and updated. Bid quantities are estimated for each job and used together with unit bid costs to esti ...
  • Engineering Economy and Energy Considerations Sprinkle Treatment How Why and Where
    Engineering Economy and Energy Considerations: Sprinkle Treatment – How, Why and Where
    Hughes Sr, Charles H ;
    Epps, J. A.
    1975-12-01 | PDF
    Recommendations are presented which were formulated on the basis of a literature review, on-site visits to construction projects utilizing sprinkle treatments in Texas and Virginia, and a representative workshop meeting. The sprinkle aggregate to be utilized as sprinkle stone should be based on established field performance indicating the aggregate ...
  • Engineering Economy and Energy Considerations Seal Coat Economics and Design
    Engineering Economy and Energy Considerations: Seal Coat Economics and Design
    Stockton, William R. ;
    Epps, Jon A.
    1975-12-01 | PDF
    This report reviews engineering guidelines that provide desired surface treatments and seal coats. Specific items discussed include identification of roadway sections suitable for surface treatment and seal coat surfaces, material selection guideline, design methods and construction control guidelines. A method is also presented which allows the en ...
  • Thermal Activity of Base Course Material Related to Pavement Cracking
    Thermal Activity of Base Course Material Related to Pavement Cracking
    Carpenter, Samuel H. ;
    Lytton, Robert L.
    1975-12-01 | PDF
    Preliminary studies into environmental deterioration of pavements indicated that low-temperature cracking of the asphalt concrete surface was not likely for the west Texas area. Likewise, shrinkage cracking due to moisture loss in the base course was not a likely mechanism. An initial computer study using a heat transfer program showed that freeze- ...
  • Engineering Economy and Energy Considerations Recycling of Pavement Materials
    Engineering Economy and Energy Considerations: Recycling of Pavement Materials
    Epps, Jon A. ;
    O'Neal, Randy J.
    1975-12-01 | PDF
    Some important projects involving recycling of paving materials are reviewed and discussed in relation to the materials utilized, and comments are made on the economics of recycling. Two types of construction operations are in general use: in place recycling, and recycling through a central plant. The materials to be recycled include: un-stabilized ...
  • Engineering Economy and Energy Considerations Warrants and Priorities for Roadway Lighting
    Engineering Economy and Energy Considerations: Warrants and Priorities for Roadway Lighting
    Walton, Ned E. ;
    McFarland, William F.
    1975-12-01 | PDF
    This report discusses the warrant point index (which can be used to determine the geometric and environmental conditions for a facility, and if a new lighting installation is warranted), the history of roadway lighting, and a questionnaire survey of district engineer opinion in this area. This survey revealed widespread use of lighting in the distr ...
  • Engineering Economy and Energy Considerations Environmental Conditions for Placing Asphalt Concrete
    Engineering Economy and Energy Considerations: Environmental Conditions for Placing Asphalt Concrete
    Smith, Roger E. ;
    Epps, Jon A.
    1975-12-01 | PDF
    The importance of proper compaction of asphalt concrete pavements has been recognized for many years. Engineers have shown that pavement stability, durability, tensile strength, fatigue resistance, stiffness, flexibility and pavement performance are controlled to a certain degree by the density of the asphalt concrete. To ensure adequate compaction ...
  • HighwayVehicleObject Simulation Model 1976 Vol 3 Engineering Manual Analysis
    Highway-Vehicle-Object Simulation Model - 1976 [Vol. 3]: Engineering Manual - Analysis
    Segal, David J.
    1975-12-01 | PDF
    A series of reports have been written to document revised and updated versions of the simulation of highway-vehicle-object interactions in a single vehicle highway environment. The programs documented were developed under FHWA sponsorship to provide the highway safety community with an analytical means of evaluating the effects of highway/roadside ...
  • Engineering Economy and Energy Considerations Incidental Costs during Construction
    Engineering Economy and Energy Considerations: Incidental Costs during Construction
    Lamkin, Jack ;
    McFarland, W. Frank
    1975-12-01 | PDF
    Incidental costs during construction, including costs of job cleanup and aesthetic treatments, range from two to four percent of total construction costs on many highway projects. Even though this percentage is relatively small present money restraints necessitate careful study of the benefits and costs of such incidental activities, especially tho ...
  • Review of National Railroad Issues
    Review of National Railroad Issues
    United States. Congress. Office of Technology Assessment
    1975-12-01 | PDF
    In 1973, the financial disarray of the Northeast and mid-West railroads led to the passage of the Rail Reorganization Act of 1973. The Act established the United States Railway Association (USRA) to develop a plan for a Consolidated Rail Corporation (CONRAIL) to be formed of the financially distressed railroads. On February 26, 1974, USRA issued a ...
  • Engineering Economy and Energy Considerations Stabilization Guidelines
    Engineering Economy and Energy Considerations: Stabilization Guidelines
    Smith, Avery W. ;
    Epps, Jon A.
    1975-12-01 | PDF
    Proper use of stabilization can produce savings in cost and, in many cases energy utilization. Stabilization is the improvement of engineering properties of soils and soil aggregate systems. This study is directed toward proper use of lime, cement, and asphalt for improving material properties and gives guidelines for selection of a stabilization a ...
  • Rapid Test Methods of Bituminous Materials Final Report
    Rapid Test Methods of Bituminous Materials: Final Report
    Carey, Donald E.
    1975-12-01 | PDF
    The primary objective of this study was two-fold: to verify for Louisiana asphalts the close agreement as found by others (Ref. 1-5) between the standard Thin Film Over Test (AASHTO T179-74) and the newly adopted Rolling Thin Film Over Test (AASHTO T240-734); and second, to seek a correlation between the standard ductility test (AASHTO T51-74) and ...
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