Well, I think here that the issue of de-identification becomes very relevant. That there is communication of information between a car and its environment to better manage the flow of vehicles, for instance, makes sense.
The first thing that should happen is a credible attempt to depersonalize that information so that it can serve its useful purposes without disclosing the location of an individual. That should be possible in many cases if rigorous methods of de-identification are used. That's certainly part of the solution.