If they have sufficient camera coverage to achieve similar tracking of a vehicle within a certain area, I'd say it becomes a distinction without a difference (which I'm guessing is along GP's point).

A more applicable case is Carpenter v. United States (https://en.wikipedia.org/wiki/Carpenter_v._United_States), in which SCOTUS ruled that aggregating an "exhausting chronicle" of information from third-party data sources -- in that case, location data from cellular towers -- does indeed amount to a Fourth Amendment search.