We cannot make Track Sections that function. The only thing we can do is produce Scenery. So what you would have would be an animated Trackpiece that is not connected to a Coaster. And i don't see them giving us the ability to make our own Coasters or Flatrides. Also understand that those things are way more complex than the ones in RCT3, before somebody makes that comparison again.
EDIT: Lol Sorry, i somehow thought i was in the Thememaker Toolkit Section
I could see this being added in planco 2 since it would be an entireley different code allowing for more complex rides maybe. But that game is still a few years away,altough probably already in development if you bellieve in the leaks.