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Showing 27221 - 27240 of 35628 results
  • A Precast Substructure Design for Standard Bridge Systems
    A Precast Substructure Design for Standard Bridge Systems
    Billington, Sarah ;
    Barnes, Robert
    1998-09-01 | PDF
    The proposed substructure system described in this report has been developed to improve the aesthetics and reduce the construction time of the support structures for standard bridges. The form of the proposed substructures is highly attractive, and is a distinct improvement over many traditional short- and medium-span bridge substructures. The subs ...
  • Design Manual for Permanent Ground Anchor Walls
    Design Manual for Permanent Ground Anchor Walls.
    Weatherby, D. E.
    1998-09-01 | PDF
    This manual presents recommendations and guidelines to improve the design and construction of permanent ground anchor walls. The recommendations are based on research performed on two full-scale wall sections, four model-scale walls, 10 large-diameter ground anchors installed in a fine-grained soil, analytical studies, and experience. It focuses on ...
  • Development of a lowcost crash cushion using recycled automobile tires
    Development of a low-cost crash cushion using recycled automobile tires
    Nabors, Daniel T. ;
    Hossain, Mustaque
    1998-09-01 | PDF
    Approximately 30 percent of all vehicle related fatalities that occur each year are caused by a single vehicle leaving the road and striking a fixed object; the most common objects struck being trees, guardrails, and utility poles. In many cases current crash cushion systems are not cost effective to be installed on such obstacles. In addition to h ...
  • Evaluation of the Performance of Texas Pavements Made with Different Coarse Aggregates Project Summary Report
    Evaluation of the Performance of Texas Pavements Made with Different Coarse Aggregates: Project Summary Report
    McCullough, B. F. ;
    Zollinger, Dan
    1998-09-01 | PDF
    This report summarizes 23 years of work undertaken in Texas to understand the reasons for significant performance differences found in pavements placed around the state. To a significant degree, pavement performance can be predicted based on the concrete material properties, on the environmental conditions prevailing when the pavement was placed, a ...
  • Agreement Between the National Air Traffic Controllers Association AFLCIO and the Federal Aviation Administration Department of Transportation
    Agreement Between the National Air Traffic Controllers Association AFL/CIO and the Federal Aviation Administration, Department of Transportation
    National Air Traffic Controllers Association  ...
    1998-09-01 | PDF
    The parties agree that air traffic controllers serve in a unique, complex and safety critical occupation. This collective bargaining agreement is designed to improve working conditions for air traffic controllers, facilitate the amicable resolution of disputes between the Parties and contribute to the growth, efficiency and prosperity of the safest ...
  • Analysis of vehicle classification and truck weight data of the New England states
    Analysis of vehicle classification and truck weight data of the New England states
    Hu, Patricia S. ;
    Schmoyer, Rick
    1998-09-01 | PDF
    This report is about a statistical analysis of 1995-96 classification and weigh in motion (WIM) data from 17 continuous traffic-monitoring sites in New England. It documents work performed by Oak Ridge National Laboratory in fulfillment of 'Analysis of Vehicle Classification and Truck Weight Data of the New England States', a project for the Office ...
  • Joint Load Transfer and Slab Loss of Support Analysis
    Joint Load Transfer and Slab Loss of Support Analysis
    Brandt, M.
    1998-09-01 | PDF
    Two Portland cement concrete pavement designs are compared and analyzed for differences in their joint load transfer efficiency and slab support. The Falling Weight Deflectometer was used to gather deflection data for both pavements. The center deflections, corner deflections and load transfer efficiency are compared. The NCHRP Project 1-21 Procedu ...
  • Adapting Safety Audits for Small Cities
    Adapting Safety Audits for Small Cities
    Haiar, Keith A. ;
    Wilson, Eugene M.
    1998-09-01 | PDF
    In this research, a practical approach to identifying street safety needs for local governments has been developed. These governments are responsible for high street mileage carrying relatively low traffic volumes. Improving safety on these streets is given only limited focus in most small cities. Due to the limited funding, manpower, and traffic e ...
  • Development of a Methodology to Estimate Bicycle and Pedestrian Travel Demand
    Development of a Methodology to Estimate Bicycle and Pedestrian Travel Demand
    Turner, S ;
    Shunk, G
    1998-09-01 | PDF
    This report summarizes research activities conducted to develop a bicycle and pedestrian travel demand forecasting methodology. Previous research reports documented the literature review (Report 1723-1) and data collection activities (Report 1723-2). The appendix of this report contains guidelines for estimating bicycle and pedestrian travel demand ...
  • Large School Bus Design Vehicle Dimensions
    Large School Bus Design Vehicle Dimensions
    Gattis, J. L. ;
    Howard, M. D.
    1998-09-01 | PDF
    A survey of United States school bus operators and manufacturers was conducted to defined the larger sizes of school buses in regular use. A mid-60 passenger type-C bus (SB-C) and a mid-80 passenger type-D bus (SB-D) were selected as design vehicles. Both the dimensions (length, width, etc.) and the trace of turning path swept through 90-degree and ...
  • Effect of Reclaimed Asphalt Pavement on Binder Properties Using the Superpave System
    Effect of Reclaimed Asphalt Pavement on Binder Properties Using the Superpave System
    Kennedy, Thomas W. ;
    Tam, Weng O.
    1998-09-01 | PDF
    While the use of reclaimed asphalt pavement (RAP) in asphalt mixes is common practice within many state departments of transportation, the evolution of the Superpave system has prompted a need for specific Superpave guidelines for the use of RAP. In this study, rheological properties were measured for different combinations and percentages of aged ...
  • Summary Report of Research on Permanent Ground Anchor Walls Volume I Current Practice and Limiting Equilibrium Analyses
    Summary Report of Research on Permanent Ground Anchor Walls, Volume I: Current Practice and Limiting Equilibrium Analyses
    Long, J. H. ;
    Weatherby, D. E.
    1998-09-01 | PDF
    Research directed toward improving the design and construction of permanent ground anchor walls is presented. The research focused on tiedback soldier beam walls for highway applications. These walls are generally less than 25 ft high, and they are supported by one or two rows of permanent ground anchors. This volume is part of a four-volume report ...
  • Global Air Navigation Systems Volume 2 Detailed Findings
    Global Air Navigation Systems. Volume 2. Detailed Findings.
    McCall, G.
    1998-09-01 | PDF
    The purpose of this book is to accelerate the understanding of the Global Positioning System (GPS) and encourage new and innovative applications. Each chapter is authored by an individual or group of individuals who are recognized as world-class authorities in their area of GPS. The two volumes are intended to be complementary. Volume I concentrate ...
  • CPI Detailed Report Data for September 1998
    CPI Detailed Report: Data for September 1998
    United States. Department of Labor. Bureau of Labor Statistics
    1998-09-01 | PDF
    The Consumer Price Index for All Urban Consumers (CPI-U) increased 0.i percent in September, before seasonal adjustment, to a level of 163.6 (1982-84=100). For the 12-month period ended in September, the CPI-U increased 1.5 percent. The Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W) rose 0.1 percent in September, prior to ...
  • Alternative fuel options and costs for use in Kansas and surrounding states
    Alternative fuel options and costs for use in Kansas and surrounding states
    Suppes, Galen J. ;
    Ponnachath, Prashanth
    1998-09-01 | PDF
    To meet state and federal mandates, state fleets, federal fleets, and fuel provider fleets must acquire alternatively fueled vehicles (AFVs). The Kansas House Bill 95-2161 exceeds the federal energy policy act regulations for state fleets. AFVs includevehicles fueled by ethanol, methanol, propane, natural gas, and electricity. This report includes ...
  • Summary Report of Research on Permanent Ground Anchor Walls Volume II FullScale Wall Tests and a SoilStructure Interaction Model
    Summary Report of Research on Permanent Ground Anchor Walls, Volume II: Full-Scale Wall Tests and a Soil-Structure Interaction Model
    Weatherby, D. E. ;
    Chung, M.
    1998-09-01 | PDF
    Research directed toward improving the design and construction of permanent ground anchor walls is presented. The research focused on tiedback soldier beam walls for highway applications. These walls are generally less than 25 ft high, and they are supported by one or two rows of permanent ground anchors. This volume is part of a four-volume report ...
  • Evaluation of Changeable Lane Assignment System for Daily Operations
    Evaluation of Changeable Lane Assignment System for Daily Operations
    Voigt, Anthony P. ;
    Goolsby, M. E.
    1998-09-01 | PDF
    The principal goal of this project was to evaluate the operational effectiveness of the Changeable Lane Assignment System (CLAS) as a space management tool to optimize daily operations in a primary corridor. This project focused on the operational evaluation of CLAS under recurrent conditions, both before and after CLAS was used to change lane assi ...
  • Laboratory Repeatability of the Hamburg WheelTracking Device and Similar WheelTracking Devices
    Laboratory Repeatability of the Hamburg Wheel-Tracking Device and Similar Wheel-Tracking Devices
    Izzo, Richard ;
    Tahmoressi, Maghsoud
    1998-09-01 | PDF
    The objective of this research was to assess the repeatability of HMAC moisture susceptibility testing using the Hamburg wheel-tracking device and similar equipment. The tests were performed round-robin-style among seven laboratories. The seven participan;See also PB95-232161 and PB95-241477.;pg 22
  • Establishment of QCQA Procedures for OpenGraded Mixes
    Establishment of QC/QA Procedures for Open-Graded Mixes
    Dunn, K. D. ;
    Gray, J. A.
    1998-09-01 | PDF
    The State of Oregon has employed the use of porous concrete surfaces (E- and F-mixes) since the 1970s. The use of porous mixes has increased substantially in the past five years. Previously, no work had been done to evaluate whether the quality control/quality assurance (QC/QA) procedures used for dense-graded mixes were appropriate for open-graded ...
  • Transportation Energy Data Book Edition 18
    Transportation Energy Data Book: Edition 18
    Davis, S. C.
    1998-09-01 | PDF
    The Transportation Energy Data Book: Edition 18 is a statistical compendium prepared and published by Oak Ridge National Laboratory (ORNL) under contract with the Office of Transportation Technologies in the Department of Energy (DOE). This 18th edition of the Transportation Data Book is different from earlier editions in that it starts in the firs ...
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