Using plates is totally doable to (and should be your default way of…) interacting with vehicles. The problem we run into however is when two identical model (and color!) cars exist in the same space, you literally have no way to tell which one you want to interact with. Using 'Nth' or the plate number in the messages is really the only way I personally see to solve this. I would personally prefer using 'Nth' in the messages as opposed to the plate number. (2nd Ferrari Aventador drives in from the west)