The 24-hour wait is supposed to be a “one-time” restriction. After you do it once, you should be able to instantly go back-and-forth if needed.

“I’m auctioning off my gmaing collection” (many items) OR
“I’m auctioning my gaming console” (single item)

You should check out this patent. When the train goes over a special section of track, it will trigger the signal at the nearby crossing