So if I speed up a bit to pass someone and that person happens to slow down a bit as I do so, and the cars get a little to close for comfort when I’m about 90% over, the car will slam on the breaks and get me rear-ended from the person I’m now in front of.
Great!
No, because the car behind you will have auto braking.
And the car behind him.
Chiropractors will be rich because of all the whiplash.