This is actually one of the more limited and benign risks of voluntarily installing a municipal/private panopticon system owned by a corporation.

Because of the motivations and degrees of agency associated with under-regulated capitalism, derived data about vehicles and people will be stored indefinitely because it has value to be extracted, to be sold and leased, to the highest bidder, be it to data brokers, police agencies (as is the supposed mission), and intelligence agencies. They won't necessarily be US-based entities either. It will be used to form judgements, discriminate, make inferences, and accusations about people with limited or wrong "evidence" anytime between now, days, years, and who knows for how long in the distant future. No privacy and unknowable risks of misuse and abuse that manifest with use of new technology developed or "connections" made with new information at any time in the future.