Airport Surface Management at LGA: Metering the departure traffic
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Transcript of Airport Surface Management at LGA: Metering the departure traffic
Airport Surface Management at LGA:Metering the departure traffic
Hector FornesAdvisor: Hamsa Balakrishnan
Agenda• Current situation at LGA• Current pushback strategy• Metering strategy• Calibration of the parameters for the model• Results and performance measures
Current situation at LGA
Source: faa.gov
Source: Balakrishna, H. , Hansman, R.J. & Reynolds 2013
Origin of the problems• Over-scheduling• Limited gates• Crossing runways (capacity reductions)• Abundance of small planes (shuttles/regional carriers)
Consequences• Operations close to capacity• Capacity limitations• Long delays• Long queues
Current taxi-out strategy:Push-back at discretion
Source: Kladilkar, H. & Reynolds, T. 2013
• How airlines dispatch departing flights • Consequences of the “at discretion” policy
Source: Balakrishna, H. , Hansman, R.J. & Reynolds 2013
Tower
Proposed taxi-out operations: Metering
Source: Balakrishna, H. , Hansman, R.J. & Reynolds 2013
Source: Balakrishna, H. , Hansman, R.J. & Reynolds 2013
Other considerations: - Gate conflicts (how we handle them)
N-control
Queing model
GOALS• Reduction of fuel burn while
taxiing out• Reduction of emissions• Reduce congestion at the
airport
Calibration of the parameters for the model
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traffic (aircrafts/15 minutes)
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traffic (aircrafts/15 minutes)
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Regression tree
Unimpeded taxi-out time
Results
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Time of day (hrs)
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Taxi time simulation for Aug 15
Unrestricted trafficNctrl traffic
Unrestricted pushbacksNctrl pushbacks
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Unrestricted taxi timesNctrl taxi times
Gate holds
04:00 08:00 12:00 16:00 20:00 00:000
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Taxi time simulation for Aug 15
Unrestricted trafficNctrl traffic
Unrestricted pushbacksNctrl pushbacks
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Unrestricted taxi timesNctrl taxi times
Gate holds
Results: Reduction of fuel and emissions
Concept Value (minutes)Total taxi in the current strategy
(pushback at discretion)21,505
Total taxi with the metering strategy (pushback at discretion)
17,509
Total taxi-out time difference 3,996
Concept ReductionFuel consumption 11,988 Kg
NOx emissions 119,880 gHC emissions 48,751 gCO emissions 267,732 g
Concept Value (per minute)Fuel consumption 3.0 Kg
NOx emissions 30 gHC emissions 12.2 gCO emissions 67 g
Unitary values
Total results
Taxi-out reductions
18.5% reduction
Results: Gate conflicts-Maximum of 6 additional conflicts over 15 days in each 15-minute period.
-This represents a maximum 1 additional conflict per 15-minute period
Results:FCFS queuing policy
AirlinePercentage of flights moving
forward
Percentage of flights moving
back% change
Delta & Regionals 7,4 16,0 -8,6American and Eagle 13,3 2,1 11,3
Us Air & Regional 7,0 13,1 -6,1United 13,7 2,0 11,7Spirit 17,5 0,0 17,5
Southwest/AirTran 10,3 1,6 8,7Jetblue 11,1 1,3 9,8Others 12,7 2,5 10,3
AirlinePercentage of flights moving
forward
Percentage of flights moving
back% change
Delta & Regionals 15,7 34,1 -18,4
American and Eagle 28,7 2,1 26,6
Us Air & Regional 6,6 25,7 -19,1
United 30,1 2,6 27,5
Spirit 30,5 0,0 30,5
Southwest/AirTran 24,1 1,3 22,8
Jetblue 20,4 1,7 18,7
Others 26,8 5,4 21,4
Current pushback strategy
Metering strategy
Summary of the performance of metering at LGA
Aspect Results of the implementation of metering
Surface congestion Reduced to the Nctrl value
Gate conflicts A maximum of 1 additional gate conflict for 15 minute period (particularly peak ours)
Taxi-out reductions 18.5% of taxi-out time18.5 % in fuel consumption18.5 % in emissions
FCFS Less deviation from the ideal FCFS policyDeviations from FCFS are reduced