You could fix the speed to whatever would allow a person to jump back when warned. But I suspect that speed is pretty low. The answer is tough shit, you don't

You could fix the speed to whatever would allow a person to jump back when warned. But I suspect that speed is pretty low. The answer is tough shit, you don't get to not pay attention while driving. Get an uber then. Having adaptive cruise control that manages stop and go will absolutely change the number of people on their phones.