Or, as is currently being tested in many European countries, cameras above the road that automatically detect drivers on their phones.
But I am not optimistic about that taking off in the US, where even speed cameras are a rarity (although I do not really know why).
See the links on https://yro.slashdot.org/story/09/03/24/145247/mississippi-p...
I think the biggest issue here is simply that the United States has created a transportation system that is inherently unsafe and ungovernable. By universalizing the automobile as the only de facto mode of transportation, we have made revoking a bad driver's license a hardship.
The only way to fix the problem is fixing the infrastructure which is extremely expensive, and politically would be wildly unpopular. We are currently doing the exact opposite -- increasing vehicle size and weight in a myopic arms race -- which means we will likely live with the scourge of traffic deaths (100+ dead per day) for the rest of our lives...
I looked into the legality of receiving a ticket from someone who is not a cop and I was under no legal obligation to pay it. However, they can ruin your credit if you refuse to pay, so I just went ahead and paid it. I did not seek legal advice and maybe I should have, but the fee was less than a lawyer would have cost.