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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 33821 - 33840 of 35438 results
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 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 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 ...
  • 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 ...
  • 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 ...
  • 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 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 ...
  • 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 ...
  • Texturing of concrete pavements interim report No 1
    Texturing of concrete pavements : interim report No. 1.
    Ross, Joseph E. ;
    Law, Sheldon M.
    1975-11-01 | PDF
    The scope of this report is to describe the results obtained during the first twelve-month period of this field research project. It includes the construction of test sections and the evaluation period after the project was opened to traffic. Each test section was evaluated using the following techniques:A. Visual ObservationB. Skid Resistance Meas ...
  • Metal pipe coupling study final report
    Metal pipe coupling study : final report.
    Law, Sheldon M.
    1975-11-01 | PDF
    The specific aims of the study were: (1) to establish a standard design for the watertight coupling systems for the various kinds of metal culvert pipe and to evaluate the test method for determining watertight systems, (2) to evaluate seam connections of different type metal pipe, and (3) to evaluate some of the various coupling systems commercial ...
  • Pilot performance and heart rate during inflight use of a compact instrument display
    Pilot performance and heart rate during in-flight use of a compact instrument display.
    Hasbrook, A. Howard ;
    Rasmussen, Paul G.
    1975-11-01 | PDF
    Instrument panels in many general aviation aircraft are becoming increasingly crowded, presenting the pilot with an instrument scanning problem. Because most aircraft instruments require use of central (foveal) vision, the pilot must look directly at each instrument to obtain needed information, taking time that may not be available during an instr ...
  • The effects of dextroamphetamine on physiological responses and complex performance during sleep loss
    The effects of dextroamphetamine on physiological responses and complex performance during sleep loss.
    Higgins, E.A. ;
    Chiles, W.D.
    1975-11-01 | PDF
    On two separate occasions, performance of 10 male subjects was measured on the Civil Aeromedical Institute Multiple Task Performance Battery at 4-hour intervals for a period of 24 hours without sleep. Each subject received a capsule at 4-hour intervals beginning at 2000. On one occasion, the first three doses contained 5 mg each of dextroamphetamin ...
  • Functional strength of commercialairline stewardesses
    Functional strength of commercial-airline stewardesses.
    Reynolds, Herbert M. ;
    Allgood, Mackie A.
    1975-11-01 | PDF
    Data from 13 body measurements and 4 strength tests on 152 female flight attendants are reported herein. The stewardesses are taller (x bar = 165.8 cm) and lighter (x bar = 54.6 kg) than the corresponding age in the civilian population. The strength tests are reported as the average plateau, maximum force, and pound-second force for a two-handed pu ...
  • Fatal and Injury Accident Rates on FederalAid and Other Highway Systems 1974
    Fatal and Injury Accident Rates on Federal-Aid and Other Highway Systems, 1974
    United States. Federal Highway Administration
    1975-11-01 | PDF
    Data on fatal and nonfatal injuries in motor vehicle traffic accidents for calendar year 1974 are summarized by highway system in the tables. These tables, compiled from reports submitted to the Federal Highway Administration by the 50 States and the District of Columbia as of November 1975, include data for all roads and streets in the United Stat ...
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