Sure, in the same way that vehicles without backup cameras or even airbags still exist. They will become less common over time. Vehicles don't have to be fully autonomous to provide this "service". They just need to have a reliable grasp of which road segment they are on and what the speed limit is. It will take some time but it won't be long before there are no cars left on the road that lack the (at least theoretical) ability to be controlled via cell radio. Heck, even without a police incentive, this will happen just because remotely disabling a car is a great way to simplify repossession.

I personally happen to think this is a terrible idea, just one cyber attack or regime change away from crippling everyday Americans ability to get around and live their lives, but that probably won't stop it from happening.

To wit, in some places you will be issued a DUI (of sorts) for riding a bicycle home from the bar. And it's actually enforced. Talk about the police shooting themselves in the foot.