Originally Posted by
Exec_Plat
Interesting. Perhaps they need staff to wait until they change the door configuration from one 'state' to the other. But once the doors are changed, that staff is done.
So the smaller group going first will always minimize the time the staff has to attend?
Who know, really....
In Haneda there are no door configuration changes, but you need staff to be ready to guide people in the right direction. In Narita it is only connecting passengers from the US that has a "no security check" flow.
Especially for Haneda my main guess is really about flow, to avoid connecting and arriving passengers from different flights to mix and avoid having too many people walking in opposite directions in central stretches of the terminal at the same time, they try to steer it. Also probably to create a bit of spacing between the groups sent towards arrival procedures.