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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 30521 - 30540 of 35440 results
  • Implementation Guidelines for Retiming Diamond Interchanges
    Implementation Guidelines for Retiming Diamond Interchanges
    Irvine, Yvonne D. ;
    Fambro, Daniel B.
    1992-12-01 | PDF
    This document provides guidelines and procedures for the retiming of diamond interchanges, including procedures for data collection, and the types and amount of data to be collected; the analytical procedures and software packages that are available for signal retiming projects; and examples of step-by-step applications for each type of signal timi ...
  • Summary Documentation for the Texas Travel Demand Package
    Summary Documentation for the Texas Travel Demand Package
    Williams, Tom A. ;
    Dresser, George B.
    1992-12-01 | PDF
    The statewide practice of urban travel forecasting in Texas is described. An overview of methods practiced and theoretical basis for travel modeling is presented in brief format. Each of the four steps used in the Texas Package travel modeling process is described TRIPCAL5, the Texas Package trip generation method, is summarized. Trip distribution ...
  • US 75 North Central Expressway Reconstruction Northwest Highway Screen Line Automobile and Transit User Panels May 1992 Survey Results
    U.S. 75 North Central Expressway Reconstruction: Northwest Highway Screen Line Automobile and Transit User Panels, May 1992 Survey Results
    Ullman, Gerald L. ;
    Collins, K. M.
    1992-12-01 | PDF
    This report summarizes the results of the survey of the North Central Expressway automobile and transit panelists conducted in May 1992. The results of the survey indicate that travel conditions in the corridor have not deteriorated significantly since the start of Expressway construction south of 1-635. Details regarding the survey analysis and re ...
  • Transportation Aspects of the Maquiladora Industry Located on the TexasMexico Border
    Transportation Aspects of the Maquiladora Industry Located on the Texas/Mexico Border
    Burke, Dock ;
    Lomax, Timothy J.
    1992-12-01 | PDF
    This report documents the study findings on truck traffic generated from the maquila industries along the Texas/Mexico border. The report also explains the benefits of the maquilas, to both the United States and Mexico. The transportation needs of Texas are defined, promoting the vital economic health of the Texas-Mexico border region.
  • Daily Variability of Commuter Decisions Dallas Survey Results
    Daily Variability of Commuter Decisions: Dallas Survey Results
    Jou, Rong-Chang ;
    Mahmassani, Hani S.
    1992-12-01 | PDF
    The consideration of user responses is important in planning reconstruction activities and in developing control strategies. Extensive surveys of actual commuter behavior in the North Central Expressway corridor in Dallas, Texas, were conducted to characterize the day-to-day dynamics of commuter decisions and to calibrate the user decision models i ...
  • Design procedures for heatstraightening repair an engineering guide
    Design procedures for heat-straightening repair : an engineering guide.
    Avent, Richard
    1992-12-01 | PDF
    This report summarizes over four years of research on heat-straightening repairs and provides a prototype engineering guide for the application of heat-straightening to bridge structures. It is based on the research results detailed in a companion report entitled, "Development of Engineering Design Procedures for Heat-Straightening Repair of Damage ...
  • Results of DATAS Investigation of Illegal Mode S IDs at JFK Airport
    Results of DATAS Investigation of Illegal Mode S ID's at JFK Airport
    Pagano, Thomas ;
    Van Dongen, John: Wapelhorst, Leo
    1992-12-01 | PDF
    This report documents the second deployment of the Data Link Test and Analysis System (DATAS) as a Traffic Alert and Collision System (TCAS) monitor. The purpose was to identify aircraft which were reporting Illegal Mode Select (Mode S) ID's. The project was conducted by the Research Directorate for Aviation Technology, Airborne Collision Avoidance ...
  • Unsurfaced Road Maintenance Management
    Unsurfaced Road Maintenance Management
    Beaucham, RE ;
    Eaton, RA
    1992-12-01 | PDF
    This draft manual describes an unsurfaced road maintenance management system for use on military installations. This system is available in either a manual or computerized mode (Micro PAVER). The maintenance standards prescribed should protect Government property with an economical and effective expenditure of maintenance funds commensurate with th ...
  • Development of an Independent Locking Securement System for Mobility Aids on Public Transportation Vehicles
    Development of an Independent Locking Securement System for Mobility Aids on Public Transportation Vehicles
    Hunter-Zaworski, Katharine M., Zaworski, Joseph R., and Clarke, Garrett
    1992-12-01 | PDF
    The Independent Locking Securement System Project (ILS System Project) is a successful attempt to respond to the transportation community's need for a "universal" securement/restraint system that will accommodate most wheeled mobility aids, including three-wheeled scooters, in common use on public transportation systems. The research project was de ...
  • Procedures for Emission Inventory Preparation Volume IV Mobile Sources
    Procedures for Emission Inventory Preparation: Volume IV: Mobile Sources
    Dobie, Natalie ;
    Newell, Terry
    1992-12-01 | PDF
    Volume IV presents an overview of the mobile source category as a whole and identifies specific methods that can be used to identify and inventory sources, estimate emissions, and establish and maintain a useful, current mobile source emissions inventory.
  • Accurate and Rapid Determination of Fatigue Damage in Bridge Superstructures
    Accurate and Rapid Determination of Fatigue Damage in Bridge Superstructures
    Hahin, Christopher ;
    South, Jeffrey M,
    1992-12-01 | PDF
    Fifteen representative steel bridges throughout the State of Illinois were instrumented with foil strain gages to determine their frequencies of loading and the magnitudes of stresses induced by traffic over a 3 to 8-hour period, depending on traffic volume. Reinforced prestressed or post-tensioned concrete bridges were not included in this study. ...
  • Protection of structural concrete substructures
    Protection of structural concrete substructures.
    Anderson, Chris
    1992-12-01 | PDF
    The corrosion of reinforcing steel within concrete has always been a problem in construction of bridge decks. With low slump concrete and epoxy rebar, progress has been made in controlling the corrosion. There is concern, however, that the chloride also attacks the substructures, specifically the pier columns. They are subject to chloride attack by ...
  • Research notes geotextile fabrics under asphalt concrete overlays
    Research notes : geotextile fabrics under asphalt concrete overlays.
    Oregon. Department of Transportation. Materials and Research Section
    1992-12-01 | PDF
    Last year, the City of Portland decided to place geotextile fabrics under asphalt concrete overlays for pavement reinforcement and crack retardation. The City expected the following benefits from using the fabrics: retardation of reflective cracks, reduction of water infiltration into underlying cracks, retardation of vegetation growth in cracks, i ...
  • Feasibility evaluation of utilizing high strength concrete in design and construction of highway bridge structures interim report
    Feasibility evaluation of utilizing high strength concrete in design and construction of highway bridge structures : interim report.
    Bruce, R. N. ;
    Russell, H. G.
    1992-12-01 | PDF
    The objective of this investigation was to evaluate the feasibility of using high-strength concrete in the design and construction of highway bridge structures. A literature search was conducted; a survey of five regional fabrication plants was performed; mix designs studied in the laboratory and in the field; and three series of tests consisting o ...
  • Evaluation of methods and materials used to attach strain gages to polymer grids for high strain conditions
    Evaluation of methods and materials used to attach strain gages to polymer grids for high strain conditions.
    Oglesby, J. ;
    Mahmoodzadegan, Behnam
    1992-12-01 | PDF
    this report concerns the attachment of strain gages to polymer soil reinforcement grids (geogrids) for high elongation measurements, i.e. 5% and higher. Existing methods of attaching strain gages to geogrids are not suited for measurement of these high strains. Therefore, a research study was initiated to develop practical and repeatable procedures ...
  • Void Development Under Bridge Approaches
    Void Development Under Bridge Approaches
    Schaefer, Vernon R. ;
    Koch, Jay C.
    1992-11-30 | PDF
    The development of voids under approach slabs to bridges can lead to distress of the approach system resulting in decreased life expectancy, increased maintenance costs for repair and stabilization, and rider discomfort due to "bumps" resulting from grade differences in the approach system. The mechanisms involved in the development of the void gen ...
  • Estimated Economic Impact of Widening US Highway 80 Marshall Avenue in Longview Texas
    Estimated Economic Impact of Widening U.S. Highway 80 (Marshall Avenue) in Longview, Texas
    Buffington, Jesse L. ;
    Wildenthal, Marie T.
    1992-11-30 | PDF
    This study is a follow up study and was initiated prior to actual construction so that the construction period could be monitored and the economic impacts of the before and after construction periods could be estimated. The following impacts were studied: (1) impact on abutting businesses and properties, (2) impact on reduction of available parking ...
  • High profile rail clearances in the State of Pennsylvania report 6 executive summary
    High profile rail clearances in the State of Pennsylvania : report 6 : executive summary
    Transmode Consultants  ...
    1992-11-10 | PDF
    The most important findings are: the expenditure of almost $81 million on construction over the next three years will results in some 900 new construction jobs available in 1993. Around 2100 additional jobs in service and support industries will be required to support this additional growth in the economy of the Commonwealth. Construction will requ ...
  • Bridge Railing End Treatments at Intersecting Streets and Drives
    Bridge Railing End Treatments at Intersecting Streets and Drives
    Ross, Hayes E. ;
    Bligh, Roger P.
    1992-11-01 | PDF
    This study addressed the problem of bridge ends on primary roads that are near intersecting roads. At these sites, standard guardrail treatments for the bridge end cannot be used because of insufficient run-out length and, therefore, alternate treatments are needed. The study approach consisted of (a) a survey of typical sites to identify the natur ...
  • Construction Contract Time Determination
    Construction Contract Time Determination
    Hancher, Donn E. ;
    McFarland, William F.
    1992-11-01 | PDF
    The primary objective of this research study was to develop a rational procedure for the Texas Department of Transportation to determine the time required to complete a construction contract for different types of highway construction projects. The final product of this research project is the TxDOT Contract Time Determination System (CTDS). The sy ...
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