My guess is that there isn't enough room between concourses for the heavies to turn into gates without blowing the ramp on the other concourse across the alleyway, well away. Detroit Metro had this same rule when NW operated out of the C concourse over at the Smith terminal. If you were parking at the end B gates, you had to shut down prior to docking at the gate for the jetblast for a sharp turn into like B10 (for those familiar with metro).
LAXintl From United States of America, joined May 2000, 24162 posts, RR: 50
Reply 4, posted (6 years 1 month 2 weeks 5 days 23 hours ago) and read 2078 times:
Tow in is required for two reasons -- wingspan clearance -- lots of 747-400s on gates, and jet blast mitigation to adjacent terminal 3 and 4 which use common alley with TBIT -- over the years AA, Alaska etc have had their share of dinged up planes having ground service equipment of containers pushed into them.
From the desert to the sea, to all of Southern California