Here in the UK we also have London's congestion charge.
All around the outskirts of London on all the main arterial roads, there are ANPR cameras tracking number plates to fine you, if you have not paid the £15 charge for entering the city.
A worrying example of ANPR.
I visited my mum one weekend, she lives over 300 miles from where I live on the egde of London.
She had a phone call while I was there from the police. They were asking to speak to me!
They said that they were concerned that there were two cars with the same registration number plate. Could I check that my car was still outside my mums home.
They had stopped another car, not the same make as mine, in London with the same number plate. The police said that the other car had been involved in criminal activity.
I can only assume that they tracked my car over 300 miles with ANPR, checked out who I was, then did a family association check, found my mum's contact details and called to speak to me.
I also assume that they must have already been to my home address and found I was not home.