Froom the Philly Enquire - Sunday April 25
<<SNIP>>
Southwest is concerned about the close proximity of the runways in Philadelphia, which can create delays. But the airline has a plan to counter the problem. Scarbrough said Southwest flights would "duck down under" the heavy air traffic in the congested Northeast corridor and approach the city at 10,000 to 12,000 feet - about half of the normal altitude.
The result is a compromise.
"We'll sacrifice gas efficiency," Scarbrough said, "to get onto the runways without delays."
Full article
http://www.philly.com/mld/philly/bus...8511380.htm?1c
John