Just cause something is publically visible doesn't mean it's not private. Privacy is about control of the data, not whether the data is visible in public or inside private property.
By taking, storing and cataloging the data, they, not the car owner, now have some control over what happens to the data. Hence it's an invasion of privacy of the car owner.
By taking, storing and cataloging the data, they, not the car owner, now have some control over what happens to the data. Hence it's an invasion of privacy of the car owner.