I'm in now. Looks like the best feedback is to make a track that is 4 feet wide from white line to white line, with a yellow strip down the center. Then don't have all 90 deg turns, so mix it up with different types of turns and straightaways.
Is there a recommendation for how thick (width) of the white line? 3 inches? What about the Yellow stripes? What should the length of each strip? and distance between successive yellow strips? _ _ _ _ _ _