The National Academies Press

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Pages 81-97

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From page 81... ... 81 E-1. Scenario Development Methodology Because this tool is meant to provide an understanding of the environmental effects of changing airport fleet and/ or flight track utilization, setting up an analysis entails generating two separate scenarios: the reference and the scenario proper. Read the entire page →
From page 82... ... 82 balance instead. Operations information can be entered to represent the entire airport movements, or only a subset of a specific scenario depending on the need. Read the entire page →
From page 83... ... 83 whether to take the time necessary to research the fleet actually operating at the airport and develop adjustment values to adapt the model's aircraft to better represent the actual fleet. Such level of detail might not be required when the tool is used to provide a quick assessment of a problem or to simply investigate and learn the effects of different environmental performances and facilities utilization. Read the entire page →
From page 84... ... 84 the airport. The reason the operations should be set according to the requirement set for noise studies is that noise is the discriminating factor on which the feasibility of a scenario is evaluated. Read the entire page →
From page 85... ... 85 gation technology installed. The application's three settings provide a range of dispersions from no dispersion to wide dispersion. Read the entire page →
From page 86... ... 86 for the CRJ9, 727, DC9, and MD80 aircraft is instead established by modifying the information in the Dispersion byAircraft tab. In this tab the ad-hoc information for these aircraft is first made active by switching the Current technology Enable toggle to the on position and then by setting the dispersion utilization percentages for all tracks to the Standard dispersion. Read the entire page →
From page 87... ... 87 of night operations for noise, the total number of operations actually modeled will be different compared to those initially entered by the user in the operations tab. For this scenario a quick review of the operations totals for the noise computations shows that • About 132 actual operations (day + night) Read the entire page →
From page 88... ... 88 tab caused the operations used to model the different parameters to change as follows: • Modeling operations for Fuel Burn increased by approximately ten operations compared to the original operations for SID dispersion; • Operations to model NOx increased by eight operations; and • The THC modeling related operations decreased by eight operations. Having verified that the modeled operations for noise and emissions changed as expected, the last task is to record all information on the assumptions implemented into the Notes field of the scenario information tab, Figure E-7, update the date, and save the scenario making sure that the file has been Figure E-6. Read the entire page →
From page 89... ... 89 renamed to avoid overwriting the original application blank template. Read the entire page →
From page 90... ... 90 source file and then adding notes on the changes applied to create the new analysis. Read the entire page →
From page 91... ... 91 modeled as 100% proportional to fuel burn. For CO and THC emissions, care must be taken as they are not modeled proportional to fuel burn. Read the entire page →
From page 92... ... 92 The future CRJ9 in this example does not receive modifications that affect its environmental performance at the source level, but instead it will be modified to fly more precise trajectories as compared to the original aircraft. This upgrade can be simply modeled within the tool by changing the percentage assignment for the dispersion utilizations while leaving all operations assigned to the Current aircraft fleet. Read the entire page →
From page 93... ... 93 track utilization tables, both by-aircraft category and byaircraft type, for the Current fleet. However, since no information was previously entered for the Future fleet, both the runway and flight tracks information for that fleet need to be updated. Read the entire page →
From page 94... ... 94 E-3.5. Flight Track Dispersion Utilization Since the updated CRJ9 operations were assigned to the Future fleet in the operations tab and the A319neo also possess the same capability, the dispersion settings for the large aircraft category in the future fleet also need to be set to use the SID dispersion for all tracks. Read the entire page →
From page 95... ... 95 also confirm that in the new scenario the aircraft is now using the RNAV dispersion tracks in the percentage intended. Read the entire page →
From page 96... ... 96 facilitate the process, a new duplicate window (by selecting "New Window" under the "View" ribbon) is created for the results tab and the view of the original window is switched to show the Utilization by-aircraft tab. Read the entire page →
From page 97... ... Abbreviations and acronyms used without deﬁnitions in TRB publications: A4A Airlines for America AAAE American Association of Airport Executives AASHO American Association of State Highway Officials AASHTO American Association of State Highway and Transportation Officials ACI–NA Airports Council International–North America ACRP Airport Cooperative Research Program ADA Americans with Disabilities Act APTA American Public Transportation Association ASCE American Society of Civil Engineers ASME American Society of Mechanical Engineers ASTM American Society for Testing and Materials ATA American Trucking Associations CTAA Community Transportation Association of America CTBSSP Commercial Truck and Bus Safety Synthesis Program DHS Department of Homeland Security DOE Department of Energy EPA Environmental Protection Agency FAA Federal Aviation Administration FHWA Federal Highway Administration FMCSA Federal Motor Carrier Safety Administration FRA Federal Railroad Administration FTA Federal Transit Administration HMCRP Hazardous Materials Cooperative Research Program IEEE Institute of Electrical and Electronics Engineers ISTEA Intermodal Surface Transportation Efficiency Act of 1991 ITE Institute of Transportation Engineers MAP-21 Moving Ahead for Progress in the 21st Century Act (2012) NASA National Aeronautics and Space Administration NASAO National Association of State Aviation Officials NCFRP National Cooperative Freight Research Program NCHRP National Cooperative Highway Research Program NHTSA National Highway Traffic Safety Administration NTSB National Transportation Safety Board PHMSA Pipeline and Hazardous Materials Safety Administration RITA Research and Innovative Technology Administration SAE Society of Automotive Engineers SAFETEA-LU Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users (2005) Read the entire page →

From page 81...

... 81 E-1. Scenario Development Methodology Because this tool is meant to provide an understanding of the environmental effects of changing airport fleet and/ or flight track utilization, setting up an analysis entails generating two separate scenarios: the reference and the scenario proper.