Municipal governments are extremely allowed to track license plates within their borders and have been doing so for generations.
But do they not need a warrant to track someones movements?
Alot of these tech vendors have been a way to launder data gathering to avoid neeidng to get warrants
That may change as they get more widely deployed; scale matters.
https://courthousenews.com/judge-holds-norfolks-license-plat...
> "Because rapid technological advances, such as the rise of artificial intelligence, make it impossible to predict how police surveillance will evolve, the Fourth Amendment analysis must remain nimble even as it remains grounded in founding-era traditions," the George W. Bush appointee wrote in a 51-page opinion. "Plaintiffs are unable to demonstrate that defendants' ALPR system is capable of tracking the whole of a person's movements."
> Davis drew distinctions from two significant precedents in determining that the pair's Fourth Amendment challenge lacked merit. In Carpenter v. United States, the Supreme Court held that the government violates the Fourth Amendment when it accesses a suspect's historical cell site location information without a warrant. The Fourth Circuit ruled in Leaders of a Beautiful Struggle v. Baltimore Police Department that the department's surveillance program, which captured and stored aerial images of nearly the entire city, violated the Fourth Amendment.
> Davis ruled that, unlike in cases where the government tracked people's movements through cellphone data and aerial photos, the collection of Flock data does not capture enough information to catalogue citizens' movements in their entirety. Davis reasoned that the 176 cameras, located in 75 clusters across the city, do not constitute a search.