Just to add, some can identify Bluetooth signals, and I wouldn’t be surprised if identification via direct TPMS (tire pressure) is added eventually.
Bluetooth and toll transponders (e.g, EZ-Pass, FastTrak) have been tracking things for decades.
First hand experience in operational rooms where both Bluetooth and the transponders are used for "traffic management" in Delaware and Washington DC. The readers are not at toll gates (only). they are sprinkled throughout highways and "high interest" areas. And, yes individual vehicles can be identified throughout their movements that is the very purpose of tracking so they can see the speed and flow of individual vehicles "to adjust intersection lights".
Aren't they static for the life of the sensor which is ~10 years?
I do not know that much about TPMS changing, only anecdotal. Every time a rim is messed up or the device fails the TPMS would change.
They might have been wrong when they told me why they "just" track car BT (and EZPass).
Sort of. The problem isn’t necessarily the speed but the range. But it could be used. Bluetooth and WiFi tracking would be more likely in most real world scenarios.
You don't need to look at all tires to make a match, but the more a car has, the more likely one will be broadcasting during the window for detection.
Even if you can’t, if you put enough of them by stop signs and traffic lights it’s a non-issue.