There are none afaik, the main problem is the outer x-sections have to be as far out from the centerline as possible (1000m) and you simply can't do that on a road course with all it's twists and turns (believe me, I've tried), you have to do this to stop the default sky tearing through the day to night sky.
OT: I wish someone would show me one of these famous GTP day to night tracks cos I'd love to figure out how they did it (due to above), because afaik, all the GTP tracks do is get progressively darker each session like we did with Thunder Road, they don't actually get progressively darker during a session (someone please prove me wrong though).