Our building is set up so one of the secondary sorts has 4 of it's belts going to each boxline. I am curious how meadowlands is set up so a hub op would interfere with a preload op. Also, my building only has a Twilight and Night sort.
The primary is shared. The T-Belts coming out of the primary have a split on them, so left side of one belt is 1 PD and right side goes to another.
I suppose a sunrise could be run if it needed to, but it would be at a reduced capacity.
Also, I do not think there is a logistical need to run a sunrise. If there was, they probably would have done it already.