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Showing 27041 - 27060 of 35628 results
  • Calibration Procedures for Seismic and DeflectionBased Devices
    Calibration Procedures for Seismic and Deflection-Based Devices
    Tandon, Vivek ;
    Nazarian, Soheil
    1998-12-01 | PDF
    The Texas Department of Transportation (TxDOT) has acquired fifteen Falling Weight Deflectometers (FWDs), one Seismic Pavement Analyzer (SPA), and five Portable Seismic Pavement Analyzers (PSPAs) for evaluating the structural integrity of pavements. These nondestructive testing devices use different types of sensors for measuring deflection, deform ...
  • FlyAsh Bases in the Atlanta District Evaluation of Surface Treatment Bond and YearTwo Field Performance Evaluations
    Fly-Ash Bases in the Atlanta District: Evaluation of Surface Treatment Bond and Year-Two Field Performance Evaluations
    Estakhri, Cindy K.
    1998-12-01 | PDF
    Hydrated fly ash is produced by allowing powder fly ash (Class C) from coal power plants to cure with moisture. The hydrated (cured) fly ash becomes a stiff material that can be crushed to form a synthetic aggregate. When properly processed and compacted to optimum moisture content, the hydrated fly ash continues to gain strength after placement as ...
  • A Methodology for Statewide Intermodal Freight Transportation Planning
    A Methodology for Statewide Intermodal Freight Transportation Planning
    Eatough, Chistopher J ;
    Brich, Stephen C
    1998-12-01 | PDF
    The researchers developed a methodology for statewide freight transportation planning that focuses on identifying and prioritizing infrastructure needs to improve the intermodal freight transportation system. It is designed to provide the framework for state departments of transportation and metropolitan planning organizations to meet the freight t ...
  • Registration violations and the use of optical character recognition technology at Kentucky weigh stations
    Registration violations and the use of optical character recognition technology at Kentucky weigh stations.
    Walton, Jennifer R. ;
    Crabtree, Joseph D.
    1998-12-01 | PDF
    No Description
  • Using chemical priming as a means of enhancing the performance of biocells for treating petroleum products containing recalcitrant chemical species
    Using chemical priming as a means of enhancing the performance of biocells for treating petroleum products containing recalcitrant chemical species.
    Wang, Winnie ;
    Zappi, Mark
    1998-12-01 | PDF
    Biocell technology is a soil remediation technology that utilizes commercial roll-off dumpsters as simple,yet effective bioreactors. Reported implementation costs for biocells range from $20 - $40 per cubic yardtreated. Biodegradation of some petroleum hydrocarbons has been found to be difficult in terms of boththe rate and extent of removal. Since ...
  • Load capacity of hollowed timber piles
    Load capacity of hollowed timber piles.
    Avent, R. R. ;
    Mukai, D. J.
    1998-12-01 | PDF
    The goal of this study was to develop a reliable load-rating methodology for timber piles based on the level of documented damage. Louisiana currently has over 4,000 timber bridges in its inventory of over 13,800 bridges. A quarter of these 4,000 timber bridges are structurally deficient since they cannot support their design loads. One of the most ...
  • High intensity radiated field external environments for civil aircraft operating in the United States of America
    High intensity radiated field external environments for civil aircraft operating in the United States of America
    Heather, F. W.
    1998-12-01 | PDF
    NAWCAD Patuxent River, Maryland, was tasked by the FAA to determine the High Intensity Radiated Field (HIRF) levels for civil aircraft operating in the U.S. The electromagnetic field survey will apply to civil aircraft seeking FAA certification under Federal Aviation Regulations (FAr's) Parts 23, 25, 27, and 29. The HIRF survey determined the Rotor ...
  • SRS H1616 hydride transport vessel qualification report
    SRS H1616 hydride transport vessel qualification report
    Smith, A. C. ;
    Van Alstine, M. N.
    1998-12-01 | PDF
    This report serves as the design qualification basis for both transport and facility use. headings identify report sections as containing qualification information for transport use, facility use, or both transport and facility use. This report demonstrates that the Savannah River Site (SRS) hydride transport vessel (HTV) both satisfies the require ...
  • Appropriations for FY1999 Department of Transportation and related agencies
    Appropriations for FY1999 : Department of Transportation and related agencies
    Thompson, D
    1998-12-01 | PDF
    For FY1999, the U.S. Department of Transportation (DOT) requested total funding of approximately $43 billion, a 1% increase over the FY1998 enacted level of $39 billion. The FY1999 budget request for the DOT was similar in may respects to the FY 1998 appropriation. There are many "macro" issues or factors that are influencing the debate over the Ad ...
  • The Bicycle Compatibility Index A Level of Service Concept Implementation Manual
    The Bicycle Compatibility Index: A Level of Service Concept, Implementation Manual
    Harkey, D. L. ;
    Reinfurt, D. W.
    1998-12-01 | PDF
    Currently, no methodology is widely accepted by engineers, planners, or bicycle coordinators that will allow them to determine how compatible a roadway is for allowing efficient operation of both bicycles and motor vehicles. Determining how existing traffic operations and geometric conditions impact a bicyclist's decision to use or not use a specif ...
    Supporting Files
  • Reducing roughness in rehabilitated asphalt concrete AC pavements
    Reducing roughness in rehabilitated asphalt concrete (AC) pavements
    United States. Federal Highway Administration
    1998-12-01 | PDF
    A recently completed study entitled, "The Investigation of Development of Pavement Roughness" (FHWA-RD-97-147), initiated by the Long Term Pavement Performance (LTPP) program, provides an answer to the question of how much different rehabilitation treatments reduce roughness. A component of the study investigated selected asphalt concrete (AC) reha ...
  • Digital Map Requirements For Automatic Vehicle Location
    Digital Map Requirements For Automatic Vehicle Location
    Greenfeld, J
    1998-12-01 | PDF
    New Jersey Transit (NJT) is currently investigating acquisition of an automated vehicle locator (AVL) system. The purpose of the AVL system is to monitor the location of buses. Knowing the location of a bus enables the agency to manage the bus fleet more efficiently and to provide their customers with up to the minute information on bus arrivals an ...
  • Portofentry Advanced Sorting System PASS operational test final report
    Port-of-entry Advanced Sorting System (PASS) operational test : final report
    Oregon. Dept. of Transportation. Research Unit
    1998-12-01 | PDF
    In 1992 the Oregon Department of Transportation undertook an operational test of the Port-of-Entry Advanced Sorting System (PASS),which uses a two-way communication automatic vehicle identification system, integrated with weigh-in-motion, automatic vehicleclassification, and over-height detection tied into a heavy vehicle database. The purpose of t ...
  • Report on Surface Transportation Boards User Fees
    Report on Surface Transportation Board’s User Fees
    United States. Department of Defense. Office of the Inspector General.
    1998-11-17 | PDF
    The objective of Inspector General's (IG) audit was to evaluate Surface Transportation Board's (STB) use of fees to fund its operations. To accomplish this objective, the IG determined whether: (1) STB is assessing fees for all billable services allowed under the existing legislative authority, and (2) user fees adequately cover the cost of those s ...
  • Transit Bus Safety Oversight
    Transit Bus Safety Oversight
    United States. National Transportation Safety Board
    1998-11-17 | PDF
    After the National Transportation Safety Board conducted several accident investigations involving transit buses (Normandy, Missouri; Cosmopolis, Washington; New York, New York; and Nashville, Tennesee) and held a public hearing on transit bus safety in March 1998, it found that substantial safety deficiencies and little Federal or State government ...
  • Applying Vehicle Dynamics Analysis and Visualization to Roadway and Roadside Studies
    Applying Vehicle Dynamics Analysis and Visualization to Roadway and Roadside Studies
    Allen, R. Wade ;
    Rosenthal, T. J.
    1998-11-13 | PDF
    This report describes the application of vehicle dynamic modeling and visualization to highway safety design within the Interactive Highway Safety Design Model (IHSDM). This concept is intended to allow highway engineers to test roadway designs by computer simulation of vehicle encounters with roadway geometric and to assess roadway alignment and v ...
  • Appropriate Seismic Reliability for Critical Equipment Systems Recommendations Based on Regional Analysis of Financial and Life Loss
    Appropriate Seismic Reliability for Critical Equipment Systems: Recommendations Based on Regional Analysis of Financial and Life Loss
    Porter, K. ;
    Scawthorn, C.
    1998-11-10 | PDF
    This study recommends a minimum seismic reliability level for critical equipment systems located in seismically vulnerable facilities. It describes a methodology to achieve cost-effective risk mitigation and applies that methodology to a test case involving an automatic sprinkler system in a high-risk building. The study builds on previously publis ...
  • Assessment of Transit Supportive Land Use for New Starts Projects FY 1999 New Starts Report A Supplement to the Fiscal Year 1999 Report on Funding Levels and Allocations of Funds for Transit Major Capital Investments
    Assessment of Transit Supportive Land Use for New Starts Projects: FY 1999 New Starts Report. A Supplement to the Fiscal Year 1999 Report on Funding Levels and Allocations of Funds for Transit Major Capital Investments
    United States. Department of Transportation. Federal Transit Administration
    1998-11-01 | PDF
    FTA assessed and rated the Transit Supportive Existing Land Use and Future Patterns of 30 candidate New Starts projects, in preliminary engineering and final design, documented in the FY 1999 New Starts Report. These land use assessments (30) examined a number of factors, including existing land use conditions, regional containment of sprawl, and t ...
  • County Business Patterns 1996 District of Columbia
    County Business Patterns, 1996: District of Columbia
    United States. Census Bureau
    1998-11-01 | PDF
    County Business Patterns is an annual series that provides subnational economic data by industry. The series is useful for studying the economic activity of small areas; analyzing economic changes over time; and as a benchmark for statistical series, surveys, and databases between economic censuses. The series serves various business uses such as a ...
  • County Business Patterns 1996 Texas
    County Business Patterns, 1996: Texas
    United States. Census Bureau
    1998-11-01 | PDF
    County Business Patterns is an annual series that provides subnational economic data by industry. The series is useful for studying the economic activity of small areas; analyzing economic changes over time; and as a benchmark for statistical series, surveys, and databases between economic censuses. The series serves various business uses such as a ...
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