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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 31241 - 31260 of 35448 results
  • Evaluation of Variability in Resilient Modulus Test Results ASTM D4123
    Evaluation of Variability in Resilient Modulus Test Results (ASTM D4123)
    Brown, E.R. ;
    Foo, Key Y.
    1989-10-01 | PDF
    Samples of asphalt mixture were evaluated in the laboratory under various conditions to evaluate the repeatability of the resilient modulus test and to evaluate the effect of stress on the measured resilient modulus. Some of the samples were prepared in the laboratory and others were obtained from in-place pavements that had been subjected to traff ...
  • Three year evaluation of I40 crack and seat experimental project
    Three year evaluation of I-40 crack and seat experimental project
    Hossain, Mustaque ;
    Scofield, Larry
    1989-10-01 | PDF
    In 1986, Project I-40-3(31) was rehabilitated using crack and seat techniques and overlaying with a 4-inch HMAC overlay. The crack and seat technique was utilized to prevent reflection cracking in the HMAC overlay caused by joints in the existing JPCP. The 4-inch overlay was provided to improve the ride quality and to increase the structural capaci ...
  • Roadway Congestion in Major Urban Areas 1982 to 1987
    Roadway Congestion in Major Urban Areas 1982 to 1987
    Hanks, James W. ;
    Lomax, Timothy J.
    1989-10-01 | PDF
    This research report is an update and expansion of "The Impact of Declining Mobility in Major Texas and Other U.S. Cities," Research Report no. 431-lF. This study expanded the number of urban areas studied to 39, to better represent a geographical cross-section of urban areas throughout the country. An assessment of the freeway and major street ope ...
  • Capacity of FormHanger Anchors in Prestressed Concrete Girders
    Capacity of Form-Hanger Anchors in Prestressed Concrete Girders
    James, Ray W.
    1989-10-01 | PDF
    A study of the practice of supporting formwork with cast-in-place and welded form-hanger anchors in precast, prestressed concrete girders was accomplished. The study included identification of the types of anchors available for use in Texas, identification of the existing procedures for selection and installation of such anchors, and laboratory tes ...
  • Land Use Impacts of the Houston Transitway System Summary Report
    Land Use Impacts of the Houston Transitway System: Summary Report
    Washington, Earl J. ;
    Stokes, Robert W.
    1989-10-01 | PDF
    This report provides a summary of a five-year study of the transportation and land use impacts resulting from the implementation of an extensive priority system of busways (transitways) and park-and-ride facilities in Houston, Texas. Over the duration of this study, four high-occupancy vehicle (HOV) lanes with supporting park and ride facilities we ...
  • AlkaliAggregate Reaction in Concrete Containing Fly Ash Final Report
    Alkali-Aggregate Reaction in Concrete Containing Fly Ash: Final Report
    Carrasquillo, Ramon L. ;
    Farbiarz, Josef
    1989-10-01 | PDF
    The main objective of this study was to determine the influences of the constituents of portland cement, aggregates, and mineral admixtures on alkali silica reaction. The testing program included 3 natural aggregates, 3 Type I and 1 Type IP portland cements, 4 Type A and 5 Type B fly ashes, tap and distilled (low pH) water, and 1 source of silica f ...
  • Human Factors Issues in Aircraft Maintenance and Inspection
    Human Factors Issues in Aircraft Maintenance and Inspection
    Shepherd, William T. ;
    Parker, James F.
    1989-10-01 | PDF
    The Federal Aviation Administration sponsored a two-day meeting in October 1988 to address issues of human factors and inspection. Presentations were given by some 13 individuals representing the full spectrum of interests in commercial aviation. Presentations also were given by three human factors scientists with backgrounds in vigilance and indus ...
  • Effects Of Spawning Run Delay On Spawning Migration Of Arctic Grayling A Thesis For The Degree Of Master Of Science
    Effects Of Spawning Run Delay On Spawning Migration Of Arctic Grayling. A Thesis For The Degree Of Master Of Science
    Fleming, D.F.
    1989-09-01 | PDF
    The effects of delays on the spawning run of Arctic grayling in Fish Creek, a tributary of the Jack River, near Cantwell, Alaska, were examined. Tagged grayling were delayed for 3, 6, or 12 days, and then released; control fish were released within 12 hours of capture. During the delays, a high proportion of females became ripe; most males were rip ...
  • Costeffectiveness of geotextiles review of performance in Alaskan roads
    Cost-effectiveness of geotextiles : review of performance in Alaskan roads
    Reckard, Matthew K.
    1989-09-01 | PDF
    The Alaska Department of Transportation and Public Facilities installed over four million square yards of geotextiles in road embankments between 1978 and 1989. The report describes the results of a project to study the effectiveness of these installations at improving road performance. Northern Region design staff initiated the project because the ...
  • Automated Transit Ridership Data Collection Pilot Test and Users Guide
    Automated Transit Ridership Data Collection Pilot Test and User’s Guide
    Barnes, Kirk E. ;
    Urbanik II, Thomas
    1989-09-01 | PDF
    Transit systems need to collect bus ridership data to evaluate operational efficiency and to comply with the reporting requirements for federal government subsides. Manual data collection, coding and summarization is a tedious, inefficient and expensive process. An automated data collection system such as the one produced by Multisystem was found t ...
  • GraphicallyOriented Analysis of Bent Caps with Movable Loads on Microcomputers
    Graphically-Oriented Analysis of Bent Caps with Movable Loads on Microcomputers
    Roschke, Paul N. ;
    Wang, B.
    1989-09-01 | PDF
    Bent Cap (CAP18) is a specialized beam-column program modified for use with AASHTO lane loading rules. It performs finite-element simulation of a linearly elastic beam-column subjected to fixed and movable loads. When Bent Cap is used for design, the following assumptions are built into the solution: (1) all supports are knife edged (pin connected) ...
  • Guidelines for Planning Designing and Operating TransitRelated Street Improvements Survey of Current Practice
    Guidelines for Planning, Designing and Operating Transit-Related Street Improvements: Survey of Current Practice
    Stokes, Robert W. ;
    Luedtke, Paul
    1989-09-01 | PDF
    This report summarizes the results of a national survey of state DOTs and local transit agencies concerning current practice in the planning, design and operation of transit-related street improvements. The summary of current practices is divided into four subsections: 1) Bus service planning guidelines; 2) Bus facility design guidelines; 3) Bus se ...
  • CATS Household Travel Survey Volume One Documentation for the Chicago Central Business District
    CATS Household Travel Survey, Volume One: Documentation for the Chicago Central Business District
    State of Illinois
    1989-09-01 | PDF
    This report contains descriptions of the surveying concepts, the editing and coding logic, the data base structure, several summary tables and the data base for the Chicago Central Business District. Also, because the data at this time are unfactored and unadjusted, references are made to the future steps that should be perused prior to using the d ...
  • The Economics of ShortLine Railroads in North Dakota
    The Economics of Short-Line Railroads in North Dakota
    Tolliver, Denver D
    1989-08-01 | PDF
    The results of this study in general suggest that some economies of size and/or density are necessary in order to operate short line networks profitability. The single, light density branch line failed to show any improvement in profitability under short line operation. However, the regional network showed a simulated cost savings of 26\ in on-line ...
  • A Comparison of Short Line and Class I Labor Costs in North Dakota
    A Comparison of Short Line and Class I Labor Costs in North Dakota
    Dooley, Frank J ;
    Tolliver, Denver D
    1989-08-01 | PDF
    The objective of this report is to provide information highlighting the differences between Class I and short line rail labor. Primary data was collected from 48 short line railroads. In addition to various railroad characteristics, information was obtained about employment levels, job classifications, wage rates, and benefit packages. Similar info ...
  • The effect of fly ash on the sulfate resistance of concrete
    The effect of fly ash on the sulfate resistance of concrete
    Tikalsky, P. J. (Paul J.) ;
    Carrasquillo, R. L.
    1989-08-01 | PDF
    The durability of concrete is determined by its ability to endure the physical and environmental surroundings without losing the functional properties and structural integrity of the original design. Concrete containing fly ash can be proportioned to meet the durability requirements of a wide range of applications, such as concrete for mass structu ...
  • Incentives for Mobility Using Market Mechanisms to Rebuild Americas Transportation Infrastructure
    Incentives for Mobility: Using Market Mechanisms to Rebuild America’s Transportation Infrastructure
    Poole, Robert W., Jr.
    1989-08-01 | PDF
    America's transportation infrastructure is inadequate, but the solution is not simply to spend more public money. A market-oriented analysis reveals that the problem is institutional. The incentives which operate in the public sector under current policies all too often lead to (a) spending on the wrong needs, (b) not making efficient use of existi ...
  • Biological Effect of South Dakota Deicer Number 2 on Environment
    Biological Effect of South Dakota Deicer Number 2 on Environment
    Bang, Sookie S ;
    Roseland, Jane A
    1989-08-01 | PDF
    The primary objective of this study is to determine the environmental impact of SDD2 by utilizing laboratory animals to evaluate its toxicity and by monitoring the behavior of SDD2 in the aquatic environment in terms of its degradation by microorganisms and adverse effect on aquatic animals. The investigation includes a series of short-term toxicit ...
  • Evaluation of Arlington Texas Diamond Interchange Strategy
    Evaluation of Arlington, Texas, Diamond Interchange Strategy
    Messer, Carroll J. ;
    Chaudhary, Nadeem A.
    1989-08-01 | PDF
    Most signalized conventional diamond interchanges in America operate in only one signal phasing sequence and this limits the efficacy of the signal system. The Texas State Department of Highways and Public Transportation (SDHPT) developed by 1984 an urban diamond controller that provided two phasing sequences that produce improved efficiency and re ...
  • An Initial Evaluation of the Feasibility of a GIS to Support PMS Applications
    An Initial Evaluation of the Feasibility of a GIS to Support PMS Applications
    Fernando, Emmanuel ;
    Paredes, Miguel
    1989-08-01 | PDF
    A geographic information system (GIS) is a computerized data base management system for managing spatially defined data. Geographic information systems are rapidly gaining popularity among transportation agencies in the United States. Already, there are on-going projects within several state and federal agencies to develop transportation applicatio ...
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