I know they are now using bluetooth gizmos attached to infrastructure on the road network to track movements. They pick up a signal from phone or similar device in a car when it passes by then when it passes another gizmo further down the road it can work out journey time data etc similar to the ANPR cameras.
I believe they are cheaper so we might see less ANPR cameras in future.
Well, that’s me sorted, then; I never have BT turned on, ever. And I frankly fail to see how a BT device can be of any use, because very few people actually use BT, except for headsets, and judging by the number of drivers with phones held in their hands, those are damned few, plus BT hasn’t got much range, maybe thirty feet, and how can a phone handset be connected to a particular car? What if it’s a PAYG, bought cheap in a supermarket? There will be no record of the person using it.
Sounds apocryphal, to me.
[edit] well! it does seem to exist: http://www.tdcsystems.co.uk/solutions/bluetooth-journey-time-system/bluetooth-journey-time-system
Still means that many people will be effectively anonymous, like me, who never have BT turned on, or use BT-enabled devices.
I could get away with murder… 😉