If you can’t identify the driver who do you ticket, the vehicle?
Precisely. The article is revealing. The issues for the writer are the terrible loss of revenue for the municipalities—taxpayers failing to fine themselves to pay for the officials' decision to put Big Brother at the intersections. And then there's envy, on the part of people who dutifully responded to the robots' summonses for fear of getting in worse trouble.
The reporter glosses over the issue of the rules of evidence. This is a hard case they're trying to turn into bad precedent. If the obligation of the prosecution to identify a suspect before charging him with a crime is winked at here, it will be winked at in more serious cases—especially where the suspect has money. It's much easier for municipalities to soak middle-class people trying to stay respectable than it is to go after Mexican gangs in the same jurisdiction who tend to shoot back.
If the OCR is so fascinated with costs to the taxpayers, bear in mind that failing to go after dangerous thugs causes far worse damage to the prosperity of taxpayers than a bunch of questionable tickets going uncollected. Look at the billions it cost New York City's economy to live with street crime under Mayor Dinkins, compared with the wealth that flowed when Giuliani started kicking criminals' butts.