TRB’s Airport Cooperative Research Program (ACRP) Report 51: Risk Assessment Method to Support Modification of Airfield Separation Standards is intended to be used to support requests for modification of standards in those circumstances where the design criteria for separations between taxiways/taxilanes and other taxiways/taxilanes and fixed or movable objects as well as separations between taxiways and runways cannot be met.
The following appendices, included in the pdf and print version of the report, will be helpful in understanding the methodology.
Other report appendices, which are available online only, provide detail and information on the development of the methodology.
In addition, the project developed aPowerPoint presentation
that may be useful for introducing and explaining the methodology to stakeholders.
In July 2021, an errata was posted for this publication: In Table 7 on page 25, the LDVO coefficient was changed from -3.088 to -13.088. The online version of the report has been corrected.
Table of Contents
|ACRP Report 51 Risk Assessment Method to Support Modification of Airfield Separation Standards||1-1|
|Transportation Research Board 2011 Executive Committee||2-2|
|Risk Assessment Method to Support Modification of Airfield Separation Standards||3-4|
|About the National Academies||5-5|
|ACRP Project 04-09 Panel||6-5|
|Chapter 1 - Background||11-10|
|Major Challenges Associated with Airfield Separations||11-11|
|FAA Modification of Standards||12-12|
|Chapter 2 - Airfield Separation Rationale||13-12|
|Chapter 3 - Data for Modeling Aircraft Deviations||21-20|
|Airfield Lateral Deviation Studies||21-20|
|Veer-Off Accidents and Incidents||21-21|
|Aircraft Veer-Off Database Organization||22-22|
|Normal Operations Data (NOD)||23-23|
|Chapter 4 - Methodology Approach||25-24|
|Taxiway and Taxilane Deviation Modeling||25-29|
|Runway Deviation Modeling||30-36|
|Chapter 5 - Validating the Methodology||37-36|
|MOS Case Studies||37-36|
|Methodology Applied to MOS Cases||37-39|
|Chapter 6 - Conclusions and Recommendations||40-39|
|Recommendations for Future Work||41-42|
|Glossary of Acronyms||43-44|
|Appendix A - Risk Assessment Methodology||48-87|
|Appendix B - Collision Risk Model||88-88|
|Appendix C - Key Studies on Aircraft Deviation||89-89|
|Appendix D - List of Veer-Off Accidents and Incidents||90-90|
|Appendix E - Sample of Normal Operations Data||91-91|
|Appendix F - Aircraft Database Summary||92-100|
|Appendix G - Summary of FAA/Boeing Taxiway Deviation Studies||101-101|
|Appendix H - Analysis of MOS Cases||102-122|
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