Maybe if they run stagger, otherwise its only the incline of the straightway to deal with?

I don't see "fighting" as much of an issue, with a car generating in excess of its weight in DF at speed, and that they are not picking a straight line down the entire straight for the bottom of the incline, but more of an exit corner, and drive to center of track, at end, drive to outside by the wall to increase the driven corner radius as much as possible for next corner.