I remember that drive across the middle of the USA. It's just a long stretch of farms and the most exciting thing is seeing what sort of food options the next exit has and hoping one of them is Taco Bell.

I remember reading somewhere that those roads could have been 100% straight lines but they put curves in them intentionally in order to keep people awake. I have no idea if this is true but it's interesting. There certainly was no geographical reason for it to be a winding road.