I have a question about arrival interval

I have a question about arrival interval.
Is the arrival interval related to the number of routes? Or is it related to the number of stands available?

Kind of both, but it does slow down the more stands you have used at a given time. The challenge is usually that you won’t use all the stands unless you park your own fleet on them as the game is designed not to done that with the generic aircraft. All you end up doing is having a very long arrival queue if you accept all the planes as they appear

I see. I hope the devs will consider both factors when handling a regular plane what come from computer routes. And thank for answer.