That's actually a very interesting idea, though I have no clue how it would work. Since the sim has a  feature called "progressive taxi" that gives pilots a highlighted visual trail to follow while taxiing acording to ATC instructions, it might be possible to try to tap into that somehow. Perhaps a module could be made to do this. Like I said, I wouldn't know where to begin, but it would be pretty slick if someone could figure out how to do it.