Seaboard92
Engineer
No but the arrivals and departures can be schedule an appropriate amount of time apart while passengers for both service can be processed simultaneously through C&I, that was my point. Afterall two flights can arrive at the same gate, one followed by the other, after the first aircraft is moved away from the gate, and the disembarkation of the passengers of the second flight need not be held up waiting for the passengers of the first flight to clear C&I. Similarly on the departure side.
I wouldn't really say that is a speedy process either because we have a lot of waits for it. It also depends how they are doing the customs. If they do it like the Cascades car by car that can take some time. Or if they all can detrain and that's that then that would be quicker. Or because it's an island platform they could have two in at the same time. Or if the platform was long enough you could just pull the train forward enough to clear a second one behind it.