OK, you know how to tell if there is an even number of trains on California Screamin'.
The placards in the window.
If the number of trains is Even, then you want to Go up the stairs on the left hand side so that when you exit, you don't have to go up and over the stairs again. If the number of trains is Odd, then you want to go up the stairs to the right.
Same thing with Indy, but can you tell if they have an even or odd number of cars on the track?
This is just for fun, we're all able bodied, so no need for accommodations.