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Airport_capacity_notes

# Airport_capacity_notes - Analysis of Air Transportation...

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Virginia Tech 1 Analysis of Air Transportation Systems Airport Capacity Dr. Antonio A. Trani Associate Professor of Civil and Environmental Engineering Virginia Polytechnic Institute and State University Fall 2002

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Virginia Tech 2 Methodologies to Assess Airport Capacity The capacity of an airport is a complex issue. Several elements of the airport facility have to be examined. Namely: a) Airside and b) Landside components. Access Road Airside Landside Runway Terminal Runway Taxiways Gates
Virginia Tech 3 Airport and Airspace Components The following components of NAS need to be examined: a) Airside - Airspace - Runways - Taxiways b) Landside - Gates - Terminal - Access road

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Virginia Tech 4 Methodologies to Study Airport Capacity/ Delay Analytic models - Easier and faster to execute - Good for preliminary airport/airspace planning (when demand function is uncertain) - Results are generally less accurate but appropriate Simulation-based models - Require more work to execute - Good for detailed assessment of existing facilities - Results are more accurate and microscopic in nature
Virginia Tech 5 Methodologies in Use to Study Capacity/ Delay Analytic models - Time-space analysis - Queueing models (deterministic and stochastic) Simulation-based models - Monte Carlo Simulation - Continuous simulation models - Discrete-event simulation models

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Virginia Tech 6 Time-Space Analysis A solid and simple technique to assess runway and airspace capacity if the headway between aircraft is known The basic idea is to estimate an expected headway, E(h) , and then estimate capacity as the inverse of the expected headway is expressed in time units (e.g., seconds) Capacity 1 E h ( ) ----------- = E h ( )
Virginia Tech 7 Time-Space Analysis Nomenclature is the minimum separation matrix (nm) is the headway between two successive aircraft (s) is the minimum arrival-departure separation (nm) is the runway occupancy time for aircraft i (s) is the standard deviation of the in-trail delivery error (s) is the speed of aircraft i (lead aircraft) in knots δ ij T ij δ ROT i σ 0 V i

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Virginia Tech 8 Time-Space Analysis Nomenclature is the trailing aircraft speed (knots) is the common approach length (nm) is the buffer times matrix between successive aircraft (s) is the value of the cumulative standard normal at probability of violation is the probability of violation of the minimum separation criteria between two aircraft V j γ B ij q v p v p v
Virginia Tech 9 Final Approach and Landing Processes Space Time Entry Gate Runway ROT j ROT i TD i V i V j γ T i T j

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Virginia Tech 10 Possible Outcomes of a Single Runway Time- Space Diagram Since aircraft approaching a runway arrive in a random pattern we distinguish between two possible scenarios: Opening Case - Instance when the approach speed of lead aircraft is higher than trailing aircraft ( ) Closing case - Instance when the approach of the lead aircraft is less than that of the trailing aircraft ( ) V i V j > V i V j
Virginia Tech 11 Opening Case Diagram (Arrivals Only) Space Time Entry Gate Runway ROT j ROT i V i V j γ T i T j V i V j > δ ij 1 1

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• Fall '10
• Staff
• Atlantic Coast Conference, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, T. Marshall Hahn

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Airport_capacity_notes - Analysis of Air Transportation...

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