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    <title>Transport Research International Documentation (TRID)</title>
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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
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    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>Transport Research International Documentation (TRID)</title>
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      <title>Relative Trends in Exogenous Factors Influencing Airline Flight Delays</title>
      <link>https://trid.trb.org/View/1953530</link>
      <description><![CDATA[This study investigates the impact of four subcategories of flight delays on total flight delays over the period from May 2005 through December 2019. Total flight delays are divided into weather, air carrier, security, and non-weather National Aviation System (NAS) delays. Using the flight data provided by the Air Travel Consumer Report of the U.S. Department of Transportation for a consistent set of ten airlines, each time-series is decomposed. Trend and seasonality are determined. Total flight delays, and each of its subcategories, demonstrate strong seasonality and follow a random walk model without drift during the sample period. Total flight delays are composed of approximately one-half air carrier caused, one-third weather related, and one-sixth non-weather NAS delays. In the period prior to 2012, weather, air carrier, non-weather NAS, and security delays follow the same pattern as total flight delays. After 2012, air carrier and non-weather NAS (infrastructure) delays follow a similar pattern as total flight delays, but weather and security delays are far fewer than would be suggested by the pattern of total delays. The latter period was consistent with a period of increased investment in “disruption management,” which may have had the desired effect on weather and security delays. Flight delays under the control of air carriers or from infrastructure issues (non-weather NAS delays) increased from 2012 through 2019.]]></description>
      <pubDate>Mon, 23 May 2022 14:35:05 GMT</pubDate>
      <guid>https://trid.trb.org/View/1953530</guid>
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      <title>FEDERAL AVIATION ADMINISTRATION PLAN FOR RESEARCH, ENGINEERING AND DEVELOPMENT 1993</title>
      <link>https://trid.trb.org/View/411072</link>
      <description><![CDATA[The FAA manages and operates the National Airspace System (NAS), a significant national resource.  However, the demands of this system are continuously growing, and changing technologies provide the opportunity to dramatically improve system effectiveness and efficiency.  To this end, the FAA's R,ED program is an investment in the future that will sustain the United States preeminence in aviation throughout the world. Without this investment, the United States leadership would erode.  Thus, the importance of aviation to the nation mandates a comprehensive research, engineering, and development program to ensure both the safety of public air transportation and the fulfillment of national priorities and policy goals.  The contributions of aviation to the nation's economy cannot be overstated.  Aviation and related industries contribute over $600 billion to the United States economy, encompassing over 8 million jobs.  Aviation is critical to business travel, tourism, and travel services, as well as aircraft components, cargo and mail transport, and industrial national and international competitiveness.  Aerospace is by far the largest exporting industry for the United States, with a 1990 industry trade surplus of $27 billion.  The United States is currently the recognized world leader in aerospace, aviation, and air traffic control.  However, this leadership role cannot be sustained without continued research into new and evolving technologies.]]></description>
      <pubDate>Fri, 14 Dec 2001 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/411072</guid>
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    <item>
      <title>FAA AEROSPACE FORECASTS, FISCAL YEARS 2001-2012</title>
      <link>https://trid.trb.org/View/673408</link>
      <description><![CDATA[This report contains the Fiscal Years 2001-2012 Federal Aviation Administration (FAA) forecasts of aviation activity at FAA facilities.  These include airports with FAA and contract control towers, air route traffic control centers, and flight service stations.  Detailed forecasts were developed for the major users of the National Aviation System--air carriers, air taxi/commuters, general aviation, and military.  The forecasts have been prepared to meet the budget and planning needs of the constituent units of the FAA and to provide information that can be used by State and local authorities, the aviation industry, and the general public.  The outlook for the 12-year forecast period is for moderate economic growth and inflation and declining real fuel prices.  Based on these assumptions, aviation activity is forecast to increase by 33.2% at the combined FAA (267 in 2000) and contract towered airports (192 in 2000, 221 in 2001) and 34.0% at air route traffic control centers.  U.S. scheduled domestic passenger enplanements are forecast to increase 53.8%--air carriers increasing 53.5% and regional/commuters growing by 93.2%.  Total international passenger traffic between the United States and the rest of the world is projected to increase 91.8%.  International passenger traffic carried on U.S. flag carriers is forecast to increase 103.3%.  The general aviation active fleet is forecast to increase by 11.2% while general aviation hours flown grow by 29.9%.]]></description>
      <pubDate>Fri, 13 Apr 2001 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/673408</guid>
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      <title>NATIONAL AIRSPACE SYSTEM: FAA HAS IMPLEMENTED SOME FREE FLIGHT INITIATIVES, BUT CHALLENGES REMAIN</title>
      <link>https://trid.trb.org/View/538731</link>
      <description><![CDATA[This report discusses the results of the review of 1) the status of FAA's efforts to implement free flight, including a planned operational demonstration formerly known as Flight 2000 and now called the Free Flight Operational Enhancement Program, and 2) the views of the aviation community and FAA on the challenges that  must be met to implement free flight in a cost-effective manner.  The predicted growth in air traffic and the aging of the air traffic control equipment led the FAA to undertake a multibillion dollar modernization effort in 1981 to improve safety capacity and efficiency of the nation's air traffic control system.  Since that time, the program has experienced substantial cost overruns, lengthy schedule delays, and significant performance shortfalls.  To get the modernization effort back on track and thereby address the limitations of the present system and satisfy users' growth demands, FAA, in consultation with the aviation community, is developing a phased approach to modernization, including a new way of managing air traffic known as 'free flight'.  Under the modernization program, FAA plans to introduce a host of new technologies and procedures that will enable free flight, allowing the agency to move gradually from its present use of highly structured rules and procedures for air traffic operations to a more flexible system in which decisions for conducting flight operations will be based increasingly on collaboration between FAA and users.]]></description>
      <pubDate>Tue, 05 Jan 1999 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/538731</guid>
    </item>
    <item>
      <title>EVALUATING CAPITAL INVESTMENTS IN THE NATIONAL AIRPORT SYSTEM: SOME POLICY IMPLICATIONS</title>
      <link>https://trid.trb.org/View/575363</link>
      <description><![CDATA[This article develops a statistical model that relates delay at an airport to aircraft demand, airport capacity, and aircraft-peaking patterns. The results of estimating the model suggest that both airport capacity and aircraft demand are significant determinants of delay. However, enhancements in airport capacity seem to be more effective in reducing delay than strategies aimed at reducing aircraft demand. Some policy implications are also discussed.]]></description>
      <pubDate>Thu, 24 Jul 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/575363</guid>
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    <item>
      <title>FEDERAL AVIATION ADMINISTRATION PLAN FOR RESEARCH, ENGINEERING, AND DEVELOPMENT (1997)</title>
      <link>https://trid.trb.org/View/572707</link>
      <description><![CDATA[The 1997 Research, Engineering, and Development (R,E&D) Plan is a 5-year calendar plan that provides research program descriptions in the nine aviation thrust areas: capacity and air traffic management technology, communication, and surveillance; weather; airport technology; aircraft safety technology; system security technology; human factors and aviation medicine; and environmental and energy.  This report provides a summary of the research efforts in each area and a brief explanation of the factors driving the current and planned work.  It also provides background information on:  the FAA process used to create the R,E&D portfolio of research programs, challenges for the National Airspace System which drive the need for research, descriptions of the inputs from the industry/academia R,E&D Advisory Group, and descriptions of how R,E&D is being coordinated with other federal agencies and industry.  Lastly, the report shows how R,E&D efforts support and integrate with the FAA Strategic Plan and Capital Investment Plan.]]></description>
      <pubDate>Tue, 15 Jul 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/572707</guid>
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    <item>
      <title>FAA AVIATION FORECASTS - FISCAL YEARS 1996-2007</title>
      <link>https://trid.trb.org/View/466185</link>
      <description><![CDATA[This report contains the Fiscal Years 1996-2007 FAA forecasts of aviation activity at FAA facilities.  Those include airports with both FAA and contract control towers, air route traffic control centers, and flight service stations.  Detailed forecasts were developed for the major users of the National Aviation System: air carriers, air taxi/commuters, general aviation, and military.  The forecasts have been prepared to meets the budget and planning needs of the constituent units of the FAA and to provide information which can be used by state and local authorities, the aviation industry, and the general public.]]></description>
      <pubDate>Mon, 03 Feb 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/466185</guid>
    </item>
    <item>
      <title>AVIATION CAPACITY ENHANCEMENT PLAN 1994</title>
      <link>https://trid.trb.org/View/466217</link>
      <description><![CDATA[A comprehensive review of Federal Aviation Administration programs intended to improve the capacity of the National Air Transportation System.  The Plan identifies the causes and extent of capacity and delay problems currently associated with air travel in the U.S. and outlines various planned and ongoing FAA projects with the potential to reduce the severity of the problems in the future.  The major areas of discussion are: airport development; airport capacity; airspace capacity; new instrument approach procedures; technology for capacity improvement; and, marketplace solutions.]]></description>
      <pubDate>Mon, 03 Feb 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/466217</guid>
    </item>
    <item>
      <title>FEDERAL AVIATION ADMINISTRATION PLAN FOR RESEARCH, ENGINEERING AND DEVELOPMENT, 1995</title>
      <link>https://trid.trb.org/View/448753</link>
      <description><![CDATA[The Research, Engineering and Development  (R,E&D) Plan describes the FAA's efforts to develop  technologies that address both current and projected National Airspace System (NAS) issues so that our nation can maintain a competitive, robust aviation infrastructure.  Two significant changes to the 1995 plan are an effort to focus on long-range planning and a priority-based selection process that ensure only the most important projects are allocated scarce resources and included in the plan.  These two changes are key to having an R,E&D program that is innovative in nature, is responsive to our 'customers' in every segment of the aviation community, and is more businesslike.  However, it is important to remember that this plan and the initial changes instituted are not the final answer.]]></description>
      <pubDate>Tue, 09 Jan 1996 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/448753</guid>
    </item>
    <item>
      <title>FAA AVIATION FORECASTS: FISCAL YEARS 1995-2006</title>
      <link>https://trid.trb.org/View/448556</link>
      <description><![CDATA[The report contains the Fiscal Years 1995-2006 Federal Aviation Administration (FAA) forecasts of aviation activity at FAA facilities.  These include airports with FAA control towers, air route traffic control centers, and flight service stations. Detailed forecasts were made for the major users of the National Aviation System: air carriers, air taxi/commuters, military, and general aviation.  The forecasts have been prepared  to meet the budget and planning needs of the constituent units of the FAA and to provide information that can be used by state and local authorities, the aviation industry, and the general public.]]></description>
      <pubDate>Sun, 03 Dec 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/448556</guid>
    </item>
    <item>
      <title>FEDERAL AVIATION ADMINISTRATION AVIATION SYSTEM CAPITAL INVESTMENT PLAN 1993</title>
      <link>https://trid.trb.org/View/411071</link>
      <description><![CDATA[This is the FAA's third annual Aviation System Capital Investment Plan (CIP).  It describes the Facilities and Equipment (F and E) programs that the FAA will pursue in addressing key concerns of the national airspace system (NAS), such as safety, efficiency, traffic demands, equipment and facilities, and airspace use.  The CIP creates a plan for evolution of the existing NAS through use of these technologies and development of new products obtained from continuing research.  The CIP is organized into six chapters.  The Introduction provides an overview of the Plan, NAS goals and national priorities, the national air transportation system, a crosswalk to other plans, return on investment, recent changes, and document organization.  To meet and document the goal of completing the NAS Plan, the Original NAS Plan chapter presents all remaining original projects.  The Growth chapter describes those requirements that expand, relocate, or consolidate existing facilities/equipment.  The Infrastructure Replenishment chapter covers additional items identified since development of the original NAS Plan.  This chapter presents projects that refurbish structures, replace obsolete equipment, or relocate facilities to maintain service, improve effectiveness, or reduce costs.  The Supportability chapter describes projects that support logistics, provide for personnel training and manage the information and human resource aspects of NAS modernization.  The last chapter, New Capabilities, addresses projects which, if implemented, are expected to add significant new capabilities to the NAS.]]></description>
      <pubDate>Wed, 14 Dec 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/411071</guid>
    </item>
    <item>
      <title>NASA AVIATION SAFETY REPORTING SYSTEM</title>
      <link>https://trid.trb.org/View/75548</link>
      <description><![CDATA[Reports describing various types of communication problems are presented along with summaries dealing with judgment and decision making. Concerns relating to the ground proximity warning system are summarized and several examples of true terrain proximity warnings are provided. An analytic study of reports relating to profile descents was performed. Problems were found to be associated with charting and graphic presentation of the descents, with lack of uniformity of the descent procedures among facilities using them, and with the flight crew workload engendered by profile descents, particularly when additional requirements are interposed by air traffic control during the execution of the profiles. A selection of alert bulletins and responses to them were reviewed.]]></description>
      <pubDate>Wed, 31 Oct 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/75548</guid>
    </item>
    <item>
      <title>FAA AVIATION FORECASTS FISCAL YEAR 1979-1990</title>
      <link>https://trid.trb.org/View/84657</link>
      <description><![CDATA[This Federal Aviation Administration (FAA) report contains the official FAA forecasts of domestic aviation activity for Fiscal Years 1979 through 1990.  It presents forecasts of aviation activity levels at FAA towered airports, air route traffic control centers, and flight service stations, as well as forecasts of aviation activity for air carriers, air taxis, general aviation, and the military--the four major users of the National Aviation System (NAS).  In addition, this report presents the complete FAA aviation forecasting system, and describes the FAA's ongoing initiative to improve the decisionmaking utility of that system for the overall aviation community.  It focuses on the FAA's interpretation of commentary received from the community, and on the agency's response to that commentary.  We encourage readers to review this information, and to use it as a basis for working with the FAA in its effort to improve the decisionmaking utility of FAA aviation forecasts.]]></description>
      <pubDate>Wed, 25 Apr 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/84657</guid>
    </item>
    <item>
      <title>ALTERNATIVE FUTURE SCENARIOS FOR THE NATIONAL AVIATION SYSTEM. VOLUME 1. EXECUTIVE SUMMARY</title>
      <link>https://trid.trb.org/View/69445</link>
      <description><![CDATA[This study updated and expanded the five socioeconomic scenarios prepared for the FAA in the prior study similarly titled. These scenarios were revised to reflect changes in conditions since the original study and to incorporate new material that may better aid the FAA in policy analysis. Scenario sections on economics were greatly augmented to give substantive descriptions of the economic and financial processes, and a new sector on international conditions was added to each scenario. This volume contains an overview of study methods and results. Summaries are given of the five scenario narratives, and the chronology of key scenario events and the levels reached for major scenario variables are presented. (Author)]]></description>
      <pubDate>Tue, 14 Mar 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/69445</guid>
    </item>
    <item>
      <title>ALTERNATIVE FUTURE SCENARIOS FOR THE NATIONAL AVIATION SYSTEM. VOLUME 3. METHODS AND DATA FOR PROJECTING THE VARIABLES</title>
      <link>https://trid.trb.org/View/57872</link>
      <description><![CDATA[Contents: Preface; Introduction, The TIA Procedure; Data Used in Making Projections.]]></description>
      <pubDate>Tue, 14 Mar 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/57872</guid>
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