Potential Increases In Aviation Passenger Delay During The 2004 Travel Season
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Potential Increases In Aviation Passenger Delay During The 2004 Travel Season
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Author : United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Aviation
language : en
Publisher:
Release Date : 2005
Potential Increases In Aviation Passenger Delay During The 2004 Travel Season written by United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Aviation and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Transportation categories.
Potential Increases In Aviation Passenger Delay During The 2004 Travel Season
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Author : United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Aviation
language : en
Publisher:
Release Date : 2005
Potential Increases In Aviation Passenger Delay During The 2004 Travel Season written by United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Aviation and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Transportation categories.
Potential Increases In Aviation Passenger Delay During The 2004 Travel Season
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Author : United States House of Representatives
language : en
Publisher:
Release Date : 2019-12-14
Potential Increases In Aviation Passenger Delay During The 2004 Travel Season written by United States House of Representatives and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-12-14 with categories.
Potential increases in aviation passenger delay during the 2004 travel season: hearing before the Subcommittee on Aviation of the Committee on Transportation and Infrastructure, House of Representatives, One Hundred Eighth Congress, second session, May 13, 2004.
Potential Increases In Aviation Passenger Delay During The 2004 Travel Season
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Author : United States. Congress
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-02-09
Potential Increases In Aviation Passenger Delay During The 2004 Travel Season written by United States. Congress and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-02-09 with categories.
Potential increases in aviation passenger delay during the 2004 travel season : hearing before the Subcommittee on Aviation of the Committee on Transportation and Infrastructure, House of Representatives, One Hundred Eighth Congress, second session, May 13, 2004.
Potential Increases In Aviation Passenger Delay During The Summer 2004 Travel Season 108 67 May 13 2004 108 2 Hearing
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Author : United States. Congress. House. Committee on Transportation and Infrastructure
language : en
Publisher:
Release Date : 2005*
Potential Increases In Aviation Passenger Delay During The Summer 2004 Travel Season 108 67 May 13 2004 108 2 Hearing written by United States. Congress. House. Committee on Transportation and Infrastructure and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005* with categories.
Potential Increases In Aviation Passenger Delay During The Summer 2004 Travel Season
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Author : United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Aviation
language : en
Publisher:
Release Date : 2005
Potential Increases In Aviation Passenger Delay During The Summer 2004 Travel Season written by United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Aviation and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Aeronautics, Commercial categories.
An Integrated Model Of Flight And Passenger Delay For Policy Analysis In The National Air Transportation System
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Author : He Sun (S.M.)
language : en
Publisher:
Release Date : 2016
An Integrated Model Of Flight And Passenger Delay For Policy Analysis In The National Air Transportation System written by He Sun (S.M.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
Demand for air travel has increased over the years and so have airport delays and congestion. Delays have a huge impact on airline costs and influence the satisfaction of passengers, thus becoming an important topic of research in the field of air transportation. In recent literature, a Passenger Delay Calculator (PDC) was proposed to estimate passenger delays. The PDC computes passenger delays for a specified day based on actual flight schedules, fight cancellation information, and ticket booking information. However, since actual fight schedules are a necessary input, the PDC cannot be applied directly to hypothetical scenarios, in which different cancellation strategies are implemented and their impact on passenger delays are evaluated. A different model. Airport Network Delays (AND), has also been developed recently. The AND model estimates fight delays and relies on an input in which demand consists of the national planned fight schedule for any given day. In this thesis, we have attempted to incorporate these two models, the AND and the PDC, within a single framework, so that the resulting new integrated model can compute passenger delays without requiring an actual flight-schedule input. The integrated model would certainly increase the usefulness and applicability of the PDC since it could be used with hypothetical scenarios, different flight cancellation strategies, etc. We first describe the framework of the integrated model for studying flight delays and passenger delays at a daily scale. The integrated model includes four components: a Tail Recovery Model, Flight Cancellation Algorithms, a Refined Airport Network Delay (RAND) model, and the PDC. The Tail Recovery Model recovers missing tail numbers for many flights recorded in the Aviation System Performance Metrics (ASPM) database. The Flight Cancellation Algorithms implement alternative strategies for flight cancellations in the presence of large delays, such as cancelling flights with long flight delays or flights with a large ratio of flight delay divided by the seating capacity of the aircraft. The RAND model is an extension of the AND, in which two implicit assumptions of the AND model have been modified. The RAND model produces better estimates of flight delays in the sense of replicating actual flight delays obtained from the ASPM database. The overall integrated model is able to compute passenger delays and relies only on planned flight schedules rather than actual flight schedules. Moreover, the integrated model facilitates the study of factors that influence flight delays, such as weather conditions and demand fluctuations, and evaluates the impact of different cancellation strategies on passenger delays. Using actual data from different days, we conclude that passenger delays can be reduced on the busiest traffic days through improved flight cancellation strategies. In the second part of the thesis, we extend the RAND model to compute flight delays on a monthly scale using different capacity profiles as input. These capacity profiles can be directly obtained from Federal Aviation Administration (FAA) reports or constructed by using classical machine learning algorithms on airport-level data. We validate our estimation of flight delays by using data of January, 2008, showing that both the capacity profiles and the RAND perform well in terms of replicating the actual monthly flight delays. These results imply that an effort can be made to develop an integrated model incorporating the RAND, the PDC etc. at a monthly scale or even at any generic time scale.
Minimizing Airline Passenger Delay Through Integrated Flight Scheduling And Aircraft Routing
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Author : Sepehr Sarmadi
language : en
Publisher:
Release Date : 2004
Minimizing Airline Passenger Delay Through Integrated Flight Scheduling And Aircraft Routing written by Sepehr Sarmadi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
Statistics show that airline flight delays and cancellations have increased continuously over the period from 1995 to 2000. During the same period, customer dissatisfaction and complaints have followed a similar, even more dramatic trend. In 2001, as a consequence of the September 1 th terrorist attacks and the resulting airline schedule reductions, delay levels decreased, but only temporarily. With growing passenger demands and stagnant capacity passenger delays and disruptions are again on the rise. Approaches to mitigate schedule disruptions include: 1) re-optimizing the schedule during operations after a disruption occurs. For example, an airline operations controller might decide to cancel or postpone some flight legs or to re-route some aircraft to recover the rest of the schedule; and 2) building robustness into the schedule in the planning stage. By robustness we mean the ability to absorb flight delays so these effects are minimized on passengers and crews. In many cases, trying to reduce delays in the planning stage can be less costly for the airlines, especially if the actions suggested to modify the schedule are not expensive. Pushing back a flight's departure time only ten minutes might cost the airline little but can potentially reduce the number of passenger misconnections given the stochastic nature of airline operations. Canceling a flight during operations for example, can be however very costly. The primary goal of this research is to propose planning models to re-route aircraft and re-time flight departures, either separately or simultaneously, in order to distribute slack time in the network optimally and reduce passenger delays. Using data from a major U.S. airline we observe that with our model, we can reduce flight and passenger delay levels.
Flight Delays Capacity Investment And Welfare Under Air Transport System Equilibrium
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Author : Bo Zou (Writer on transportation)
language : en
Publisher:
Release Date : 2012
Flight Delays Capacity Investment And Welfare Under Air Transport System Equilibrium written by Bo Zou (Writer on transportation) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
Infrastructure capacity investment has been traditionally viewed as an important means to mitigate congestion and delay in the air transportation system. Given the huge amount of cost involved, justifying the benefit returns is of critical importance when making investment decisions. This dissertation proposes an equilibrium-based benefit assessment framework for aviation infrastructure capacity investment. This framework takes into consideration the interplays among key system components, including flight delay, passenger demand, flight traffic, airline cost, and airfare, and their responses to infrastructure capacity investment. We explicitly account for the impact of service quantity changes on benefit assessment. Greater service quantity is associated with two positive feedback effects: the so-called Mohring effect and economies of link/segment density. On the other hand, greater service quantity results in diseconomies of density at nodes/airports, because higher traffic density at the airport leads to greater airport delays. The capacity-constrained system equilibrium is derived from those competing forces. Two approaches are developed to investigate air transport system equilibrium and its shift in response to infrastructure capacity expansion. In Chapter 2, we first view the system equilibrium from the airline competition perspective. We model airlines' gaming behavior for airfare and frequency in duopoly markets, assuming that airlines have the knowledge of individuals' utility structure while making decisions, and that delay negatively affects individuals' utility and increases airline operating cost. The theoretical airline competition model developed in Chapter 2 provides analytical insights into the interactions among various system components. Under a symmetric Nash equilibrium, we find that the presence of flight delay increases passenger generalized cost and discourages air travel. Airlines would not pass delay cost entirely onto passengers through higher fare, but also account for the impact of service degradation on passenger willingness-to-pay and consequently passenger demand. To avoid exorbitant flight delays, airlines would use larger aircraft, meanwhile taking advantage of economies of aircraft size. The resulting unit cost reduction partially offsets operating delay cost increase. The equilibrium shift triggered by capacity expansion reduces both schedule delay and flight delay, leading to lower passenger generalized cost and higher demand, despite slightly increased airfare. Airlines will receive larger profit, and consumer welfare will increase, as a result of the expansion. Although delay reduction is less than expected because of induced demand, the overall benefit, which encompasses reduction in both schedule delay and flight delay, would be much greater than estimated from a purely delay-based standpoint. The equilibrium analysis can be alternatively approached from a traveler-centric perspective. The premise of an air transport user (i.e. traveler) equilibrium is that each traveler in the air transportation system maximizes his/her utility when making travel decisions. The utility depends upon market supply and performance characteristics, consisting of airfare, flight frequency, and flight delay. The extent of airline competition is implicitly reflected in the determination of airfare and flight frequency. Given the limited empirical evidence of the delay effect on air transportation system supply, two econometric models for airfare and flight frequency are estimated in Chapter 3. We find positive delay effect on fare, which should be interpreted as the net effect of airlines' tendency to pass delay cost to passengers while also compensating for service quality degradation. Higher delay discourages carriers from scheduling more flights on a segment. Both delay effects, however, are relatively small. The estimated fare and frequency models, together with passenger demand and airport delay models presented in Chapter 4, are integrated to formulate the air transport user equilibrium as fixed point and variational inequality problems. We prove that the equilibrium existence is guaranteed; whereas equilibrium uniqueness cannot be guaranteed. We apply the user equilibrium to a fully connected, hypothetical network with the co-existence of direct and connecting air services. Using a simple, heuristic algorithm, we find that the equilibrium is insensitive to initial demand values, suggesting that there may be a single equilibrium for this particular model instance. Hub capacity investment attracts spoke-spoke passengers from non-stop routes, and generates new demand on hub-related routes. At the market level, hub capacity expansion would result in greater total demand and consequently passenger benefits in almost all markets--except for ones where a predominant portion of passengers choose non-stop routes due to extremely high circuity for one-stop travel. In the latter set of markets, after capacity expansion passenger demand and benefits would be both reduced. This counter-intuitive result carries important implications that capacity increase does not necessarily benefit everyone in the system. Similar to the findings from the airline competition model, with changes in flight delay, schedule delay, airfare, and total demand, the user equilibrium model yields much higher passenger benefits from capacity investment than the conventional method; whereas hub delay saving is offset by traffic diversion and induced demand. With continuous capacity investment, the air transportation network will witness substantial changes in service supply and traffic patterns.
Congestion And Delays
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Author : United States. Congress. Senate. Committee on Commerce, Science, and Transportation. Subcommittee on Aviation Operations, Safety, and Security
language : en
Publisher:
Release Date : 2012
Congestion And Delays written by United States. Congress. Senate. Committee on Commerce, Science, and Transportation. Subcommittee on Aviation Operations, Safety, and Security and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Aeronautics categories.