United States Department of Transportation
i
FTA Runway Capacity Model (RUNCAP) and Delay Simulation (DELAYSIM) Analysis for Logan Airport
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1994-04-01
[PDF-850.96 KB]
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TRIS Online Accession Number:1642450
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Edition:Revision 1
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Abstract:At Boston Logan International Airport (Logan) the centerline separation between Runways 4L and 4R is 1,500 feet. The manner in which the runways are used is dependent upon several factors including: weather, traffic demand, compliance with noise abatement procedures, and the type of aircraft operation (jet versus propeller). For the Enhanced Preferential Runway Advisory System (PRAS), Flight Transportation Associates, Inc. (FTA) has compiled a series of runway configurations which include the mix of jets and props and the assignment of aircraft to runways. For this investigation, a configuration consisting of runways 4L, 4R, and 9 was selected. The following conclusions were reached following a Runway Capacity Model (RUNCAP) and Delay Simulation (DELAYSIM) analysis. Operations on Runways 4L, 4R, and 9 at Logan are restricted by several factors. The two primary constraints are the weather and noise abatement policies. Apparently, when the weather is Category I, wind conditions at Logan do not favor this configuration more than 3 to 4 percent of the time. Additionally, the surrounding communities and the airport authority have reached agreements to limit the types of operations permitted on certain runways and to use runways in a manner that equitably distributes noise. The results of this analysis lead to the conclusion that the reduction of wake vortex separations would not greatly benefit Logan over time. For the small percentage of time that the weather is Category I and the configuration is available, however, delays would be reduced significantly. At similar airports in the United States, it may be possible that the use of closely spaced parallel runways during Instrument Flight Rules (IFR) conditions is more frequent. At these airports, noise policies may not be as restrictive. In such a case, reduced wake vortex separations may prove to be much more advantageous over the long term than appears to be the case for Logan.
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