[doublepost=1501274620][/doublepost]This had better be an opt-in feature of the system rather than a default. If iPhone cuts off my ability to receive calls when on the move, then I will drop iPhone like a bad habit and go with another cell phone company that doesn't try to act like a Nanny.
It mentions in the article that it is optional, so I think you will be okay.
Do Not Disturb While Driving is a fully optional feature that drivers can choose not to use or can toggle off at any time, but it's an important new safety feature that you should consider turning on to cut down on distractions.