You cannot close a runway completely in FS9 or FSX. What you can do is lower the runway score card so another runway is prefered. AFCAD was not designed to lower the scoring of a runway in FS9. The closing checkmarks are a holdover from FS2002 where a one end of a runway could be closed.The AI system (even for FS9) is still a black-box kind of problem where experimentation is all we have in the absence of any real information. For example, AI arrivals will sometimes use runways marked as closed for landing even when there's a parallel runway available, eg Heathrow, where I use the southern runway for departures only, but have seen a BA 767 arrive on it all the same even though it is closed for arrivals at both ends.
The parking spot is allocated when the AI Plane reaches the taxi in segment of the flight. There are 4 segments to an arrival AI Plane.Also I'm not sure my experience agrees with your assertion that arriving AI are allocated a parking place prior to reaching a hold-short node after exiting the runway.
I agree. Only the first plane in the takeoff and landing sort list will normally use the shortest route. When a airport fills with takeoff and landings ATC does its best to avoid taxi stalls between airplanes. You will see AI planes exit runways in opposite directions and take longer taxiway routes to avoid other AI Planes that are taxing out to a runway. It is for the reason the plumbing system does not work for all airports.With regard to the tutorial, you mention that AI uses black links in the shortest route to the threshold, but that's not universally true.
Old thread, I know, but I was looking for something else and stumbled on this reply.The parking spot is allocated when the AI Plane reaches the taxi in segment of the flight. There are 4 segments to an arrival AI Plane.
Taxi In occurs when the AI Plane slows to 20 kt IAS while on the runway. At this point the parking spot is assigned.
The arrival holdshort node has one purpose and that is for switching to ground freq. If no hold short exist then planes stack up at the parking spot based on the sort list of parking that FS uses.