The use of groundspeed in combination with airspeed has been considered and shown to be an effective aid 1n the execution of an approach and landing 1n a heavy jet transport airplane. A flight dynamics analysis shows that the response of such aircraft to sudden changes 1n headwind 1S quite sluggish, requiring more than 100 seconds for equilibrium c
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NTSB accident data indicate that low-time, non-instrument rated general aviation pilots are disproportionately involved in fatal weather-related accidents. In view of the existing 200-hour experience requirement (FAR 61.65) for an instrument rating, some 150 hours of flight time must be accumulated between Private Pilot Certification and issuance o
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Traffic signals are used to control the right of way at intersections. Strict engineering guidelines are published in the Manual on Uniform Traffic Control Devices (MUTCD) that engineers use to determine if a traffic signal is “warranted”. The warrants provide consistent national balance between mobility, safety, efficiency, and costs. However, sig
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Performance measures play a critical role in the operation of Intelligent Transportation Systems (ITS), because they provide feedback to the operators regarding system operations and efficiency. Traffic management systems use archived data, provided by various sensors, as a basis for describing normal conditions and predicting traffic conditions th
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This study sought to determine whether a change in motor vehicle access to a commercial property had a measurable impact on year-to-year changes in the number of customers visiting or in the volume of customer transactions, while controlling for other influences.
Some types of geometric improvements that the Virginia Department of Transportation (VDOT) has begun to build in the past two decades, such as the reduction in the number of arterial access points, the replacement of a traditional four-way intersection with a roundabout, or a restricted crossing U-turn, or left-turn prohibitions, have elicited expr
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Performance measures play a critical role in the operation of Intelligent Transportation Systems (ITS), because they provide feedback to the operators regarding system operations and efficiency. Traffic management systems use archived data, provided by various sensors, as a basis for describing normal conditions and predicting traffic conditions th
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Steel pipe piles are a promising alternative to traditional H-piles and drilled shafts for ALDOT bridge substructures because they can achieve high force and moment capacity and enable more efficient construction. However, current guidance on steel pipe pile–to–reinforced concrete bent cap connections is limited, and practices among state DOTs vary
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This report describes the Mass Weather Dissemination System Exploratory Engineering Model software currently being evaluated in the Flight Service Station Engineering Laboratory. The object of this effort is to investigate, through development, test and evaluation, the application of digital technology to the dissemination of meteorological and aer
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In support of the Airway Facilities Service's program to provide Remote Monitoring Systems (RMS) at Remote Communications Air-Ground (RCAG) sites, the Technical Center was tasked to determine the necessary characteristics of external filters, modems, etc., which would enable RMS digital data transmission over existing site-to-center telephone lines
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This report introduces a systematic approach to the design of algorithms for evaluating the corrected slant range in a radar surveillance system. Applications include air traffic control (ATC) operations requiring real-time continuous computation for a multitude of targets without overtaxing available computational resources. From the point of view
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Seventeen full-scale fire tests were conducted to examine the effect of thermal radiation from a large fuel fire on the integrity of pressurized aircraft evacuation slides. Urethane nylon, aluminized urethane nylon, neoprene nylon, aluminized neoprene nylon, and aluminized neoprene Kevlar slides were tested at various distances from a 30-by-30-foot
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The Federal Aviation Administration (FAA) 1S presently planning to install an approach lighting system with sequenced flashing lights for category II (ALSF-2) on runway 22R at the McGhee-Tyson Airport, Knoxville, Tennessee. This project was performed in response to an Airway Facilities Services request to determine the feasibility of modifying a fl
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The variation in emissions over the exhaust area of a General Electric CF6-50 model engine was investigated in order to determine the requirements for a representative sample. The emission measurements were made in a systematic pattern of 120 sample points using a traversing probe system. These data were used to develop detailed emission profiles a
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This study evaluates the effectiveness of Speed Safety Camera (SSC) deployments in reducing traffic speeds through four interstate work zones in Indiana in accordance with Indiana State Law House Enrolled Act (HEA) 1015. The initial deployment of SSC was along interstate I-70 in August 2024, with deployments on I-69, I-465, and I-65 subsequently fo
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Fuel spillage tests were conducted to evaluate the performance of an antimisting fuel (FM-9 with glycol/amine carrier fluid) in a simulated crash environment. The results of the tests are: (1) FM-9 when compared with neat Jet A afforded flammability protection even under test conditions which resulted in a "fail" for the FM-9; (2) 0.3% 80"F FM-9 pr
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Data were collected on the performance of the Remote System Monitor (RSM), type FA-9852/1, at the Federal Aviation Administration (FAA) Technical Center. The RSM supports the Radar Beacon Performance Monitor (RBPM) program. The performance was monitored in a real-world environment as a subtask of 9550-AAF-501-78-002. The parameters observed were az
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The Terminal Information Processing System (TIPS) and the Consolidated Cab Display (CCD) were analyzed in terms of air traffic control (ATC) requirements, system engineering, conceptual differences and similarities, central processors, software, and central processing system cost. In broad terms, this report outlines the ATC users' requirements, wh
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The interaction between tires and the road surface is crucial for maintaining vehicle stability and safety. The frictional forces at the tire-road interface, along with the coefficient of friction, affect vehicle dynamics, influencing transportation safety. Rapid advancements in transportation technology, infrastructure demands, and safety regulati
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This research examined soil resistivity and corrosivity by studying several key factors that influence how buried steel corrodes. Three studies were conducted as part of this research, which used new experimental and analytical methods:(1) experimental evaluation of soil resistivity in controlled, constant conditions using a newly devised experimen
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Lin, Yizhou