If you're zipping along at 50 mph on a state two lane and can't slow down enough to avoid rear ending slower traffic in the road in front of you, you're a dangerous driver who has no business being on the road. It doesn't make any difference it it's a bicycle, farm machinery, or a horse and buggy in front of you.
Did you miss all the parts about blind curves and hills on really treacherous mountain roads?
Thought so.