planes can't cross in same square (migrated from trac, id 362 )
Original report is from Tue Nov 17 10:37:12 2009 by user: kuan_ji
Original asignee for this issue is user: somebody
In MAX two (I didn't know if more) planes can be at the same time in the same square (perhaps at different heights). Furthermore, if they routes cross, they don't have to avoid each other.