National Academies of Sciences, Engineering, and Medicine
2026-08-01
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The Federal Aviation Administration (FAA) needs to assess the impacts of unusually high and low aircraft cabin air temperatures, and related ambient conditions such as humidity levels, on the health and safety of the passengers and cabin crew of commercial airlines. This study was directed in Section 323 of the 2024 FAA Reauthorization Act, with th
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National Academies of Sciences, Engineering, and Medicine
2026-08-01
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The Federal Aviation Administration (FAA) needs to assess the health risks caused by radiation exposure among crewmembers operating under Part 121. This study was directed in Section 322 of the 2024 FAA Reauthorization Act, with the study commencing not later than 120 days after the date of enactment of the Act. SEC. 322. STUDY ON RADIATION EXPOSUR
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In this research, the Federal Railroad Administration (FRA) sponsored a team from the University of Delaware to develop a multidimensional, time-based Track Safety and Quality Index (TSQI) for assessing and monitoring the condition of railway tracks. The index captures the temporal dependencies and uncertainties associated with track parameters by
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States of reduced operator alertness, such as fatigue and inattention, are well-known factors contributing to railway accidents and safety incidents. However, more effective solutions are needed to mitigate their impact. Driver state monitoring (DSM) systems can potentially play a mitigatory role, as these systems use cameras and sensors to continu
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We extended existing algorithms for estimating latent traffic state from loop detector and connected vehicle to account for spill back effects. The traffic state estimates are input to adaptive traffic signal control algorithm which dynamically updates splits and offsets. Splits are determined based on the proportionally fair rule, and the offsets
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Volume I of this report describes the proposed Runway Configuration Management System RCMS operational software for review by the facility personnel. It also serves as an input to RCMS functional specifications for the Traffic Management System TMS program. Using interactive computer logic, RCMS helps supervisors select runway configurations which
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Volume I of this report describes the proposed Runway Configuration Management System RCMS operational software for review by the facility personnel. It also serves as an input to RCMS functional specifications for the Traffic Management System TMS program. Using interactive computer logic, RCMS helps supervisors select runway configurations which
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Transit Signal Priority (TSP) is a Transportation Systems Management and Operations (TSMO) strategy that adjusts signal timing to prioritize transit vehicles, reducing intersection delays and improving schedule reliability. While TSP has been utilized in many places in the U.S. and abroad, evidence suggests that this strategy often increases delays
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Timely and accurate information regarding roadway incidents is critical for Traffic Management Centers (TMCs) to maintain safety and mobility. While Intelligent Transportation Systems (ITS) cameras and crowdsourced data provide significant visibility, rural interstate corridors often suffer from coverage gaps, or "blind spots," where incidents go u
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This study leverages big data from the Strava Metro app, integrated with official count data from the Orange County Transportation Authority, to analyze spatial patterns of bicycling ridership in Orange County, California. By applying bias correction techniques to crowdsourced data and incorporating land use and socioeconomic covariates, the study
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This study analyzes track allocation as a practical problem of how a busy railway shares limited time on the same track. First, Indian Railways' rules for planning maintenance blocks were reviewed, including the rolling block system and the way line capacity is calculated. This is helpful in understanding how the system is supposed to work on paper
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This report summarizes findings of Media Habits research conducted for Queen City Metro during November 1978. The purpose of this research is to profile media habits--television viewer ship, radio listenership, and newspaper readership--among current riders. The objective of this study is to provide media direction in order to more efficiently and
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This report summarizes findings from Off- Peak Advertising Impact Research conducted for Queen City Metro. The purpose of this research is to assess the impact of QCM's "off- peak" advertising campaign. Methodology, analytical framework, study findings, and media strategy implications are presented below. Data tables and the survey questionnaire ar
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United States. Department of Transportation. Federal Aviation Administration
1990-01-01
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This report presents statistical information pertaining to the Federal Aviation Administration, the National Airspace System, Airports, Airport Activity, U.S. Civil Air Carrier Fleet, U.S. Civil Air Carrier Operating Data, Airmen, General Aviation Aircraft, Aircraft Accidents, Aeronautical Production and Imports/Exports, and a Glossary of the terms
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This report documents the results from a limited study of Electrical Parameters of Composite Materials. These efforts provided an evaluation of grounding and bonding test methods for metal, metal honeycomb, and advanced composite materials. A review of the electrical currents in the bonding and grounding paths on aircraft concluded that the lightni
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This report describes the work that was performed to support the Federal Aviation Administration's Crash Dynamics Program. An element of the program was the Controlled Impact Demonstration (CID) of a Boeing 720 aircraft. Work related to the CID involved developing modifications of commercial transport seats to improve their structural crashworthine
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This report describes test procedures and results of series of tests designed to identify microwave landing system (MLS) heliport flight inspection procedures. The tests, conducted in November 1985, demonstrated the feasibility of using helicopter to perform some portion of the flight inspection of the MLS at heliports. Significant findings include
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This report describes dynamometer tests that simulated conditions found in a general-aviation aircraft. In these tests, automobile gasoline was tested and compared with aviation gasoline. The tendency for vapor lock and detonation was measured as a function of gasoline grade, Reid vapor pressure, and the age of the fuel.
This report describes a study of fires and interior materials in General Aviation (GA) aircraft during 1974-1983. The purpose of the study was to learn trends in GA fires and the materials used in aircraft interiors. The study covered aircraft of less than 12,501 pounds gross weight, not in commercial or agricultural operations. Fires are a minor p
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This report describes a non-intrusive optical technique for determination of liquid mass flux in a droplet laden airstream. The technique was developed for quantitative determination of engine water ingestion resulting from heavy rain or wheel spray. Independent measurements of the liquid water content (LWC) of the droplet laden airstream and of th
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United States Department of Transportation
Zarembski, Allan M.