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Showing 33141 - 33160 of 36747 results
  • Alternative approaches to cargo policy a supplement to an assessment of maritime trade and technology
    Alternative approaches to cargo policy : a supplement to an assessment of maritime trade and technology
    United States. Congress. Office of Technology Assessment
    1985-08-01 | PDF
    When the Office of Technology Assessment (OTA) published An Assessment of Maritime Trade and Technology in October 1983, one of its principal findings was that because national interests were not defined and strategies for international negotiation had not been developed, there was at that time no generally accepted U.S. maritime cargo policy. The ...
  • Breed Air Bag Sled Testing Program Volume III
    Breed Air Bag Sled Testing Program: Volume III
    Esser, R.
    1985-08-01 | PDF
    Sled tests were performed using a driver-only airbag system in conjunction with various belting systems to determine injury criteria using 5th, 50th, and 95th percentile dummies.
  • Stabilometer S Value Comparison Using AntiStripping Additives
    Stabilometer “S” Value Comparison Using Anti-Stripping Additives
    Lund, John W. ;
    Wilson, James E.
    1985-07-01 | PDF
    From January through July, 1985, asphalt mixes from five construction projects, with and without an anti-stripping additive, were compared for stability. Ten mix samples for each project, at varying asphalt cement content, were prepared and tested in the Hveem stabilometer ("S" value). Both first and second compaction results were determined. A tab ...
  • Alternative Mass Transportation Technologies Technical Data
    Alternative Mass Transportation Technologies Technical Data
    Christiansen, Dennis L.
    1985-07-01 | PDF
    The State Department of Highways and Public Transportation has funded research in the area of high-occupancy vehicle (HOV) priority facilities for over a decade. Recently, major transit plans have been developed for the Dallas and Houston areas. Those plans considered, in addition to HOV facilities, various rail technologies. Similar analyses are n ...
  • The effects of engineering fabric in street pavement on low bearing capacity soil in New Orleans executive summary
    The effects of engineering fabric in street pavement on low bearing capacity soil in New Orleans : executive summary.
    Louisiana. Department of Highways. Research and Development Section
    1985-07-01 | PDF
    Subsurface soil in the New Orleans area is generally composed of peat and clay. The low bearing capacity of the soft natural soil has caused early deterioration of asphaltic concrete pavements which typically fail prior to carrying their designed loads. Maintenance of the network of 1,500 miles of streets within the city limits has become a tremend ...
  • Stabilometer S value study on asphalt concrete samples
    Stabilometer "S" value study on asphalt concrete samples.
    Lund, John W. ;
    Boyle, Glenn E.
    1985-07-01 | PDF
    During the late fall of 1969 a study was made to determine the precision when testing asphalt concrete specimens for the Hveem stabilometer ("S") value (AASHTO T 246). Fifty samples, using Chevron 85-100 asphalt cement and aggregate from Walling Sand and Gravel (Salem Backtop), were prepared at each of five asphalt contents. The asphalt contents ra ...
  • Fiscal and Organizational Impacts of PartTime Labor in Public Transit
    Fiscal and Organizational Impacts of Part-Time Labor in Public Transit
    Giuliano, Genevieve ;
    Lave, Charles A.
    1985-07-01 | PDF
    A typical transit agency will have about twice as many vehicles in operation during the peak hours as at midday. The increased difficulty of obtaining transit subsidies in recent years has produced a corresponding increase in concern over operating efficiency and labor productivity. The use of part-time operators (PTOS) has emerged as one of the mo ...
  • Evaluation of Questionnaire For 19811983 Projects on Asphalt Aging in Hot Mix Plants
    Evaluation of Questionnaire For 1981-1983 Projects on Asphalt Aging in Hot Mix Plants
    Lund, John W. ;
    Wilson, James E.
    1985-07-01 | PDF
    As a measure of the aging of asphalt concrete mixes in the mixing and placement process, a formula was developed to determine the percentage of expected change in asphalt viscosity at the time of paving (Lund and Wilson, 1984). A value of 30 or higher was used in 1983-84 for acceptance on paving projects. At the conclusion of this study, a follow-u ...
  • Some Effects of Alcohol and Simulated Altitude on Complex Performance Scores and Breathalyzer Readings
    Some Effects of Alcohol and Simulated Altitude on Complex Performance Scores and Breathalyzer Readings
    Collins, William E. ;
    Mertens, Henry W.
    1985-07-01 | PDF
    This study assessed possible interactive effects of alcohol and a simulated altitude of 12,500 ft. Each of 17 men was trained on the various tasks that comprise the Multiple Task Performance Battery and then performed over a 2-week period in four experimental sessions, viz, ground level (1,300 ft), with and without alcohol, and altitude (12,500 ft) ...
  • Design of spurtype streambank stabilization structures
    Design of spur-type streambank stabilization structures.
    Brown, Scott A.
    1985-07-01 | PDF
    streambank stabilization structures has been conducted to establish designguidelines and other criteria for the use of spurs. The recommendations andfindings are based on a thorough review of pertinent literature, analysis ofseveral hundred field sites, and on a recent laboratory study conducted by theFederal Highway Administration. Recommendations ...
  • Evaluation of fly ash in water reduced paving mixtures
    Evaluation of fly ash in water reduced paving mixtures.
    Brown, Bernard C.
    1985-06-01 | PDF
    Fly ash was used to replace 15% of the cement in C3WR and C6WR concretepaving mixes containing ASTM C494 Type A water reducin9 admixtures. Two ClassC ashes and one Class F ash from Iowa approved sources were examined in eachmix. When Class C ashes were used they were substituted on the basis of 1pound of ash added for each pound of cement deleted. ...
  • Field evaluation of fly ash in aggregate shoulder materials final report
    Field evaluation of fly ash in aggregate shoulder materials : final report.
    Melancon, James ;
    Pittman, Atha E.
    1985-06-01 | PDF
    This study consisted of an evaluation of self-hardening fly ash (Class C) used as an additive in the treatment of shoulders surfaced with sand clay gravel and/or shell (oyster). This was accomplished through construction of fly ash treated aggregate shoulder test sections at four sites in two phases. In the first phase test sections were constructe ...
  • Sulphur Extended Asphalt Field Trials on MH 153 Brazos County Texas Final Report
    Sulphur Extended Asphalt Field Trials on MH 153, Brazos County, Texas: Final Report
    Gallaway, Bob M.
    1985-06-01 | PDF
    There were three main objectives of this study of the sulfur extended asphalt field trials on MH 153 in Brazos County, Texas. These objectives are stated as follows: (1) to compare the benefits of sulfur-asphalt binder prepared in a mill as an emulsion with sulfur-asphalt binder prepared by by-passing the mill and comingling the molten sulfur and h ...
  • An experimental blowing dust alarm system for highways
    An experimental blowing dust alarm system for highways.
    Shinsel, Victor
    1985-06-01 | PDF
    No Description
  • Field Evaluation of the Texas Seal Coat Design Method
    Field Evaluation of the Texas Seal Coat Design Method
    Holmgreen, R. J. ;
    Epps, Jon A.
    1985-06-01 | PDF
    The information contained in this report represents data collected on over 80 seal coats in seven districts in Texas. The sections included variables such as a range of traffic concentration, climate and road surface conditions. All projects used in this study were constructed in 1982 and 1983. A preconstruction field evaluation of site involving a ...
  • Analysis of Truck Use and Highway Cost Allocation in Texas
    Analysis of Truck Use and Highway Cost Allocation in Texas
    Garcia-Diaz, Alberto ;
    Burke, Dock
    1985-06-01 | PDF
    The highway cost allocation problem is one of determining equitable charges for each of the vehicle classes sharing transportation facilities such as highways and bridges. Previous attempts at solving this problem can essentially be reduced to two major approaches: (a) proportional allocation methods, which determine costs in proportion to one or m ...
  • Chemkrete modified asphaltic concrete field trial construction and first year evaluation
    Chemkrete modified asphaltic concrete field trial : construction and first year evaluation.
    Paul, Harold R. ;
    Kemp, Sarah F.
    1985-06-01 | PDF
    This report documents the construction of a Chemkrete modified asphaltic concrete field trial and presents first year performance data. Normal plant and roadway operations were maintained throughout the production of the Chemkrete modified mix. Initial binder testing, however, indicated the possibility of non-uniform blending of the Chemkrete addit ...
  • Some Measures of Accessibility of Large Trucks to the Texas Highway System
    Some Measures of Accessibility of Large Trucks to the Texas Highway System
    Fesenmaier, Julie ;
    Burke, Dock
    1985-06-01 | PDF
    The Surface Transportation Assistance Act (STM) of 1982 established a nationally uniform maximum limit to the length, width, and weight of commercial vehicles. In accordance with the act, a national network of routes that could safely and structurally accommodate the large and heavier vehicles was established. The objective of this study was to dev ...
  • Annual Report of the Maritime Administration 1984 MARAD 1984
    Annual Report of the Maritime Administration 1984 [MARAD 1984]
    United States. Department of Transportation. Maritime Administration
    1985-06-01 | Annual Reports of the Maritime Administration | PDF
    The Annual Report of the Maritime Administration (MARAD) is submitted in accordance with the Merchant Marine Act, 1936, as amended, and incorporates certain other reports required by the Congress. This report reviews the Agency's activities in administering federal maritime programs and pertinent developments which affected the United States mariti ...
  • The Changing Structure of the North Dakota Country Elevator Industry as a Result of MultiCar Rates Implications for Conduct and Performance
    The Changing Structure of the North Dakota Country Elevator Industry as a Result of Multi-Car Rates: Implications for Conduct and Performance
    Rodriguez, Julene M.
    1985-06-01 | PDF
    The objectives of this paper are to: 1) describe recent structural changes in the North Dakota country elevator industry; 2) document the change in concentration of grain handling in the North Dakota country elevator industry before and after implementation of multi-car rates; and 3) suggest implications of these changes.
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