Aircraft taxi tests were conducted to compare the heating correlation of radial and bias-ply tires. The tires were tested on a Boeing 727-200QC, owned and operated by the Federal Aviation Administration (FAA) for the purpose of aircraft safety research. The aircraft was taxied at two different tire loads, at three different speeds, and for a given
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Many bridges in the state of Indiana have been identified to have cracking in the concrete deck. Cracking has been identified in the negative and positive moment regions of bridges on both the top and bottom surfaces and can appear before or shortly after the opening of the structure to live loads. Significant crack widths and various degrees of cr
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Utility relocation at the Iowa Department of Transportation (Iowa DOT) is frequently cited as a cause of construction delays and increased highway project costs. This research aimed to enhance alignment between the utility coordination and project development processes by providing recommendations for integrating utility stakeholder partnerships ea
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In 1993 and 1994 the FAA Technical Center conducted an evaluation of retro-reflective beads in airport pavement markings. That study proved that the addition of glass beads greatly enhanced the conspicuity of the surface markings. In the study the beaded stripes had a silica (sand) friction enhancement added to the paint. A concern arose as to ·the
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With ever increasing traffic loadings, highway pavement maintenance needs continue to outpace the availability of resources, and transportation agencies seek cost-effective maintenance practices. This study investigated the effectiveness of maintenance treatments in the short-term and the cost effectiveness of maintenance strategies over entire pav
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The study found that there are significant benefits associated with maintenance treatments, and that such short-term impacts generally involve an increase in pavement condition or a decrease in deterioration rate. It was found that the timing of maintenance with respect to performance monitoring was vital for correct assessment of maintenance effec
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Data on aircraft fleet service difficulties between 1988 and 1990 were used to estimate fire detector false alarms in the domestic commercial jet fleet. For Class C cargo compartments, data on fleet composition and utilization were used to establish false alarm rates using two levels of analytical detail. False alarms for engine nacelles, auxiliary
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The Indiana Department of Transportation(INDOT) is beginning to make widespread use of wireless communications for interconnect of traffic signals in coordinated systems. The radiotechnology adopted for use in these systems is based upon spread spectrum modulation (either frequency hopped or direct sequence) and the frequency band is typically the
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The characteristics of converging-diverging nozzles are compared to those of converging nozzles for use in aircraft cabin smoke control. The peak flow flight regimes for the two different nozzles are compared by means of test data taken on a Boeing 757. The converging-diverging nozzle is shown as capable of maintaining peak volumetric flow over a w
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Several dual color (red/blue) edge lighting configurations used to define the pre-threshold and post-runway end segments of declared distance runways were evaluated at four different airports. At three airports, Binghamton Regional Airport, Baltimore-Washington Airport, and Atlantic City International Airport, the lighting configurations were in ac
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TKS anti-icing fluid is being used in a variety of platforms to provided anti-/deicing capability for smaller commercial aircraft. The flammable liquid is comprised of 85 percent ethylene glycol, 10 percent water, and 5 percent isopropyl alcohol, and questions about its potential hazards have been raised. These hazards include, but are not limited
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The purpose of this project was to conduct research to determine the degree to which safety management systems have been implemented in a variety of aviation safety oversight systems outside the United States; to determine the basis and characteristics of those systems; and to what degree similarities and differences exist among those systems, as w
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The full-scale engine detonation performance of mid-and high-octane leaded and unleaded fuels were compared at the onset of light detonation in a naturally aspirated Lycoming IO540-K and a naturally aspirated Lycoming IO320-B engine. The fuels were stressed by performing both mixture lean-outs and by increasing the manifold pressure. The high-octan
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A copper slug calorimeter was used to measure the cold-wall heat flux and the convective heat transfer coefficient in the Ohio State University (OSU) Rate of Heat Release Apparatus specified in Federal Aviation Regulation (FAR) 25.853(a-1). The copper slug calorimeter is an American Society of Testing (ASTM) primary standard used for measuring the
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This Strategic Plan (or Plan) establishes the U.S. Department of Transportation (Department or DOT) strategic goals and objectives for Fiscal Years (FY) 2026 through 2030. In accordance with the Government Performance and Results Act (GPRA) Modernization Act of 2010, Cabinet-level departments must develop a new Strategic Plan at the beginning of ea
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The Federal Aviation Administration (FAA) Aviation Fuels and Engine Test Program requested a data analysis to support the Aviation Fuels Research Planning task. The purpose of the data analysis was to establish a baseline of aviation fuels currently in use by all reciprocating engine-powered aircraft to quantitatively assess the effect of first red
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The general aviation gasoline user community has established a goal to reduce the amount of lead added to current aviation gasoline. This endeavor evaluated lead additive levels in commercially available aviation gasolines currently meeting the ASTM D 910 specification for 100 low lead. Certificates of Analysis were procured for contemporary loads
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A vertical Bunsen burner test for flammability of plastics (UL-94V) was studied in an attempt to relate the upward burning of plastics to their material fire properties. It was shown that the heat release parameter, the critical heat flux for piloted ignition, and the thermal response parameter account for most of the fire behavior of plastics in t
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Tests were performed at the Federal Aviation Administration William J. Hughes Technical Center by the Fire Safety Team of the Airport and Aircraft Research and Development Group to determine if intermixing different manufacturer cells within an aircraft nickel-cadmium battery has an effect on battery performance and if any such effect results in a
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This project uses information about Vermont’s incentives and detailed vehicle records to evaluate who received incentives and the performance of Vermont’s clean transportation incentive programs in terms of greenhouse gas emissions (GHGs), cost effectiveness, and equity.
This study evaluates four of Vermont’s recent clean transportation incentive programs in terms of emissions reductions, cost effectiveness, and equity. We evaluate the New PEV, Replace Your Ride, MileageSmart, and eBike programs overall and for variations in the types of vehicles incentivized. The four programs evaluated achieved GHG emission reduc
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United States Department of Transportation
Victorio, Shani A. Montes