airport surface management at lga: metering the departure traffic
DESCRIPTION
Airport Surface Management at LGA: Metering the departure traffic. Hector Fornes Advisor : Hamsa Balakrishnan. Agenda. Current situation at LGA Current pushback strategy Metering strategy Calibration of the parameters for the model Results and performance measures. - PowerPoint PPT PresentationTRANSCRIPT
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Airport Surface Management at LGA:Metering the departure traffic
Hector FornesAdvisor: Hamsa Balakrishnan
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Agenda• Current situation at LGA• Current pushback strategy• Metering strategy• Calibration of the parameters for the model• Results and performance measures
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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
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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
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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
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Calibration of the parameters for the model
0 5 10 15 20 25 30 35 4010
20
30
40
50
60
70
80
90
100
110
traffic (aircrafts/15 minutes)
taxi
-out
tim
e (m
in)
0 5 10 15 20 25 30 35 4010
20
30
40
50
60
70
80
90
100
traffic (aircrafts/15 minutes)
taxi
-out
tim
e (m
in)
Regression tree
Unimpeded taxi-out time
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Results
04:00 08:00 12:00 16:00 20:00 00:000
5
10
15
20
25
Time of day (hrs)
Sur
face
traf
fic le
vel
Taxi time simulation for Aug 15
Unrestricted trafficNctrl traffic
Unrestricted pushbacksNctrl pushbacks
4 6 8 10 12 14 16 18 20 22 24-100
-50
0
50
100
Tim
e (m
in)
Unrestricted taxi timesNctrl taxi times
Gate holds
04:00 08:00 12:00 16:00 20:00 00:000
5
10
15
20
25
Time of day (hrs)
Sur
face
traf
fic le
vel
Taxi time simulation for Aug 15
Unrestricted trafficNctrl traffic
Unrestricted pushbacksNctrl pushbacks
4 6 8 10 12 14 16 18 20 22 24-100
-50
0
50
100
Tim
e (m
in)
Unrestricted taxi timesNctrl taxi times
Gate holds
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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
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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
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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
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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