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Showing 27341 - 27360 of 35628 results
  • Current Business Reports Transportation Annual Survey 1996
    Current Business Reports: Transportation Annual Survey 1996
    United States. Department of Commerce. Economics and Statistics Administration. U.S. Census Bureau  ...
    1998-07-01 | PDF
    This report presents the results from the 1996 Transportation Annual Survey. This annual sample survey represents all employer firms with one or more establishments that are primarily engaged in providing commercial motor freight transportation or public warehousing services. This includes firms furnishing local or long-distance trucking or transfe ...
  • CVISN Model Deployment Initiative Summary Evaluation Plan Executive Summary
    CVISN Model Deployment Initiative: Summary Evaluation Plan: Executive Summary
    Orban, John ;
    Brand, Daniel
    1998-07-01 | PDF
    The purpose of the Commercial Vehicle Information Systems and Networks Model Deployment Initiative (CVISN MDI) is to demonstrate the technical and institutional feasibility, costs, and benefits of the primary Intelligent Transportation Systems (ITS) user services for commercial vehicle operations (CVO) and to encourage further deployment of these s ...
  • The Kansas Grade Crossing Consolidation Study
    The Kansas Grade Crossing Consolidation Study
    Russell, Eugene R. ;
    Mutabazi, Madaniyo
    1998-07-01 | PDF
    The United States Department of Transportation (USDOT) has put renewed emphasis on closure of rail-highway grade crossings. In 1991, the Administrator of the Federal Railroad Administration (FRA) established a goal of closing 25% or all grade crossings in the USA. This is an ideal time for a study in Kansas to make recommendations for a state progr ...
  • Ohio Traffic Crash Facts 1997
    Ohio Traffic Crash Facts, 1997
    Ohio. Dept. of Public Safety
    1998-07-01 | PDF
    Information contained in this report represents traffic crash data and supporting informationfrom the Ohio Integrated Traffic Records System and various other state agency sources. Data presented herein represents the contents of those files on or about 4/1/98. Most of the data files used to generate this report are subject to minor changes over ti ...
  • Physical Changes Associated with Navigation Traffic on the Illinois and Upper Mississippi Rivers Appendices Long Term Resource Monitoring Program
    Physical Changes Associated with Navigation Traffic on the Illinois and Upper Mississippi Rivers (Appendices). Long Term Resource Monitoring Program.
    Bhowmik, Nani G. ;
    Soong, David
    1998-07-01 | PDF
    The present investigation is one of the first attempts to quantify the hydraulic changes associated with the movement of navigation traffic within the Upper Mississippi River System (UMRS). Work is also being done by researchers from the Waterways Experiment. See also PB98-167752 and PB94-160199. Sponsored by Geological Survey, Onalaska, WI. Enviro ...
  • Physical Changes Associated with Navigation Traffic on the Illinois and Upper Mississippi Rivers Long Term Resource Monitoring Program
    Physical Changes Associated with Navigation Traffic on the Illinois and Upper Mississippi Rivers. Long Term Resource Monitoring Program
    Bhowmik, Nani G. ;
    Soong, David
    1998-07-01 | PDF
    The present investigation is one of the first attempts to quantify the hydraulic changes associated with the movement of navigation traffic within the Upper Mississippi River System (UMRS). Work is also being done by researchers from the Waterways Experiment. See also PB94-160199 and Appendices, PB98-167760, PB94-162930, and PB95-171864. Sponsored ...
  • Experimental Analysis and Analytical Modeling of Bridges With and Without Diaphragms
    Experimental Analysis and Analytical Modeling of Bridges With and Without Diaphragms
    Griffin, J. J. ;
    Harik, I. E.
    1998-07-01 | PDF
    Two prestressed concrete (P/C) I -girder bridges along the coal haul route system of Southeastern Kentucky were constructed with a 50 degree skew angle. One of the bridges has concrete intermediate diaphragms, while the other bridge has no intermediate diaphragms. Bridges of similar design along coal haul routes have experienced unusual concrete sp ...
  • An Acoustic Analysis of ATC Communication
    An Acoustic Analysis of ATC Communication
    Prinzo, O. Veronika ;
    Pickett, Emily
    1998-07-01 | PDF
    This report consists of an acoustic analysis of air traffic control (ATC) communications. Air traffic control specialists (ATCS) from a TRACON facility participated in the simulation study. Each ATCS worked light and heavy traffic density scenarios for 2 feeders and 1 final sector. All communications were audio recorded and transcribed verbatim by ...
  • Recommendations for Establishing the Texas Roadway Research Implementation Center
    Recommendations for Establishing the Texas Roadway Research Implementation Center
    Allen, John J. ;
    Smit, Andre de Fortier
    1998-07-01 | PDF
    The overall objective of the Roadway Research Initiative study was to describe an advanced testing capability, on that would speed implementation of the results from traditional computer and laboratory-based research efforts by providing a reusable test bed for evaluating field performance under actual traffic and environmental conditions. A longer ...
  • Hydrologic budget for a wetland system
    Hydrologic budget for a wetland system.
    Yu, S. L. ;
    Fassman, E. A.
    1998-07-01 | PDF
    An important functional indicator of the success of a constructed wetland as a replacement for a natural system is the hydrology ofa site and whether it is adequate to support wetland vegetation and habitats. For constructed wetlands with potentially limitinghydrologic conditions, such as sites that rely on stormwater runoff as the primary source o ...
  • Juvenile and resident salmonid movement and passage through culverts
    Juvenile and resident salmonid movement and passage through culverts
    Kahler, T. H. ;
    Quinn, T. P.
    1998-07-01 | PDF
    An outcome of the Washington State Department of Transportation's Juvenile Fish Passage Workshop on September 24, 1997, was agreement that a literature review was necessary to determine the state of knowledge about juvenile salmonid movement and passage through culverts at road crossings. This report summarizes the findings of the literature review ...
  • Expected Safety Benefits Of Implementing Intelligent Transportation Systems In Virginia A Synthesis Of The Literature
    Expected Safety Benefits Of Implementing Intelligent Transportation Systems In Virginia: A Synthesis Of The Literature
    Jernigan, Jack D.
    1998-07-01 | PDF
    The purpose of this study was to identify, through a literature review, the potential safety benefits of implementing various Intelligent Transportation System (ITS) technologies through Virginia's Smart Travel Program. This study was requested by the ITS Section of the Virginia Department of Transportation to document what is believed to be an und ...
  • Constructed wetlands for stormwater management
    Constructed wetlands for stormwater management.
    Yu, S. L. ;
    Fitch, G. M.
    1998-07-01 | PDF
    This report presents the results of research to evaluate the potential of utilizing mitigated wetlands as stormwater Best Management Practices (BMPs). Results of wetland monitoring, wetland modeling, and geographic information system (GIS) development are presented. Average removal rates as high as 90% for total suspended solids (TSS), 65% for chem ...
  • Simulation Imaging and Mechanics of Asphalt Pavement SIMAP Initiative
    Simulation, Imaging, and Mechanics of Asphalt Pavement (SIMAP) Initiative
    United States. Federal Highway Administration
    1998-07-01 | PDF
    Asphalt concrete is a complex material that consists of aggregates, asphalt, and air voids. Aggregates are held together by asphalt and form a skeleton to support the weight of vehicles. The stiffer the asphalt, the tighter the aggregates are held together and the heavier the load a pavement is able to handle. Certain aggregate structures have stro ...
  • Modeling Intersection Crash Counts and Traffic Volume
    Modeling Intersection Crash Counts and Traffic Volume
    Joksch, H. C. ;
    Kostyniuk, L. P.
    1998-07-01 | PDF
    This research explored the feasibility of modeling crash counts at intersections with use of available exposure measures. The basic purpose of "exposure" is to serve as a size factor to allow comparison of crash counts among populations of different sizes. In the context of highway crash studies, at first glance, vehicle miles of travel (VMT) appea ...
  • HighPerformance Concrete Defined for Highway Structures
    High-Performance Concrete Defined for Highway Structures
    Cook, Raymond A. ;
    Goodspeed, Charles
    1998-07-01 | PDF
    The HPC (High Performance Concrete) definition presented here identifies a set of concrete performance characteristics sufficient to estimate long-term concrete durability and strength for highway structures. Standard laboratory tests, specimen preparation;Also pub. as ACI High Performance Concrete Committee, Farmington Hills, MI. report. no. SR-4. ...
  • Corrosion Performance of EpoxyCoated Reinforcement Summary Findings and Guidelines
    Corrosion Performance of Epoxy-Coated Reinforcement – Summary, Findings, and Guidelines
    Vaca-Cortes, Enrique ;
    Kahhaleh, Khaled Z.
    1998-07-01 | PDF
    The integrity and corrosion performance of epoxy-coated reinforcement in aggressive environments was investigated through a series of experimental studies, including: a) use of holiday detection for assessing damage to coating; b) hot water immersion and knife testing for assessment of coating adhesion; c) assessment of materials and procedures for ...
  • Preliminary Evaluation of Superpave Level One Mix Design Procedure
    Preliminary Evaluation of Superpave Level One Mix Design Procedure
    Ksaibati, Khaled ;
    Stephen, J.
    1998-07-01 | PDF
    The objective of this study was to compare the Superpave mix design to the Marshall mix design on a typical aggregate source in Wyoming. The comparison concentrated on the resistance to rutting and low-temperature cracking of asphalt mixes prepared using the two design methods. Chapter 1 of this report provides an introduction. Chapter 2 contains a ...
  • Threecable median barrier final report
    Three-cable median barrier final report.
    Sposito, Brett ;
    Johnston, Sam
    1998-07-01 | PDF
    Oregon public interest peaked regarding crossover highway safety following three fatalities from a crossover accident in August of 1996. The Oregon Department of Transportation (ODOT) conducted a review of possible barrier solutions for the interstate highway median near Salem, Oregon. The weak-post three-cable median barrier system was selected. U ...
  • Using light emitting diodes in traffic signals final report
    Using light emitting diodes in traffic signals : final report.
    Edgar, Rob ;
    Close, C.
    1998-07-01 | PDF
    In 1993, the Oregon Department of Transportation (ODOT) began testing red light emitting diodes (LED's) as a replacement to the incandescent lamps in vehicular and pedestrian signals. Field performance was found to be reliable and subsequently ODOT began replacing all red incandescent lamps. In 1995, an implementation program was created to introdu ...
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