Corrosion of buried steel, a critical component of American transportation infrastructure, remains one of the most insidious challenges due to the uncertainty associated with its estimates. Predicting when and how this corrosion happens is very difficult. This uncertainty grows exponentially with time, making corrosion estimation in the long term e
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Results of a math model study for the runway 191 Instrument Landing System (ILS) glide slope at the San Francisco International Airport, San Francisco, California, are presented. This study was performed at the request of the Western Region to determine the effects on glide slope performance resulting from proposed relocation of the glide slope and
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This report describes the development of a spreadsheet-based modeling framework for calculating lifecycle economic and energy costs of new Express Lane facilities. The report discusses relevant background information, spreadsheet-based model structures, and development of spreadsheet calculation methodologies. The report also describes the developm
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A test and evaluation (T&E) was conducted to determine the surveillance characteristics of the Mode S (formerly the Discrete Address Beacon System (DABS)) en route and terminal sensors operating with effective receive beam widths of 2.4° and 3.4°. The tests described herein were conducted at the FAA Technical Center for terminal and en route Mode S
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This is the first quarterly data report on the reliability and maintainability evaluation of the Basic Wide Microwave Landing System located at Wallops Island, Virginia. Chargeable and nonchargeable failures are defined. Chargeable failures are listed, and calculated reliability values are presented.
The purpose of this effort was to determine the performance characteristics of air traffic control radar beacon transponders in an operational environment in general aviation aircraft. A transponder performance analyzer (TPA) was developed at the Federal Aviation Administration Technical Center to measure performance parameters of transponders inst
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This research addresses the lack of specific, quantitative guidelines within the Georgia Department of Transportation’s (GDOT) Standard Operating Procedure 3 (SOP-3) for evaluating nonconforming precast/prestressed concrete girders. SOP-3 currently provides general recommendations but does not offer objective criteria for acceptance, repair, or rej
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The American Association of State Highway and Transportation Officials (AASHTO) and the American Welding Society (AWS) provide extensive guidance documents that govern the welding of steel bridge members; however, none of the documents provide guidance regarding the number of times a welding nonconformance can be repaired without penalty or rejecti
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This report presents information on flight service station (FSS) displays and is part of the FSS Automation Program. FSS specialists from manual and automated facilities evaluated a variety of display options. The options included standard and high resolution, P39 and P40 phosphors, monochrome and color, and several methods of formatting and coding
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A portable photographic radar recording system developed by the Technical Center Photographic Laboratory was evaluated to determine its capability to monitor and record bird movements as detected by an airport surveillance radar. This system was developed for use by U.S. Fish and Wildlife Service (USFWS) biologists for study of bird hazards problem
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The major objective of this study was to develop a rational method of interpreting profilograph traces using 0.0- inch blanking band method and to establish a corresponding pavement smoothness specification. The secondary objective was to develop/adopt an automated system for the pavement profile analysis from profilograph traces.
The development of techniques and criteria permitting the release of a helicopter into known (i.e., forecast) icing situations is actively being investigated by both military and civilian agencies through ongoing test programs and study efforts. As part of this overall effort, helicopter icing characteristics, available ice protection technology, a
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Currently, Indiana Department of Transportation (INDOT) is using the California Profilograph as the standard measuring device in its smoothness specifications. The output derived from the profilograph is called Profile Index (PI). PI represents the total accumulated deviations of the profilograph output traces beyond a tolerance zone (blanking band
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Crash-based safety analysis is set back by several shortcomings such as randomness and rarity of crash occurrences, lack of timeliness, and inconsistency in crash reporting. Safety analysis based on observable traffic characteristics more frequent than crashes is one promising alternative. Traditional approach to alternative safety analysis relies
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Crash-based safety analysis is set back by several shortcomings such as randomness and rarity of crash occurrences, lack of timeliness, and inconsistency in crash reporting. Non-crash-based safety analysis has been around for more than three decades, but its potential was limited due to a difficulty in the data collection and the evaluation. Recent
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The objective of this project is to determine the suitability of the Full Digital Automated Radar Terminal System (ARTS) Display for operational use in automated terminal air traffic control facilities. The results of this evaluation will be presented in a final report which will serve as the basis for a future production specification.
This study aimed at reviewing existing highway tort liability risk management practices in other states for possible applicability to the Indiana Department of Transportation (INDOT), developing a framework for managing highway tort liability risks in the state, and determining the inputs and respective impacts of various levels of risk management.
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The loss of states’ sovereign immunity in the 1970’s opened the gates for highway-related tort liability suits against the states. Between January 2001 and September 2002, the State of Indiana investigated and settled hundreds of highway-related tort cases, involving several millions of dollars in taxpayers’ money. There is a need to assess the fre
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Automated Terminal Services (ATS) is a concept which was developed by the Federal Aviation Administration (FAA) to enhance the ability of pilots to see and avoid other traffic, in accordance with existing Visual Flight Rules (VFR) procedures, at certain busy nontowered airports. It involves the use of a minicomputer, interfaced with an Air Traffic
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Determine what is required in order to interface a radar display recording and playback centers. system with En Route Automated Radar Tracking System (EARTS) offshore Develop, fabricate, and test a breadboard Administration (FAA) Technical Center. model at the Federal Aviation Provide a coordination draft technical data handoff package specificatio
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