(For example, imagine 10 LEDs arranged so that each LED illuminates 1/10th of the license plate, where 1 LED is on at a time. If the frequency is high enough, to human eyes it'll appear as though the entire plate is illuminated equally, but any photo will have one spot (or two spots) illuminated much more than the others.)
In London, cash is no longer accepted on the bus. Same deal for subways. The smart card (Oyster) is purchasable without ID but not disposable without showing ID and a deposit is charged. Paper travelcards are available at much higher cost per journey.
Smaller towns have cash bus tickets :)
Taxi may be viable but it's a matter of chaffing; are you hailing, or calling a private hire company/using Uber? The former is far more expensive here and also not really viable in many cities.
The train is also drastically more expensive unless you buy advance tickets online (on the day tickets can be obscene, hundreds of pounds for a 200 mile journey).
Bicycle is viable, for now.
Basically, most methods are trackable, there just might be levels of indirection. Buying a ticket online or using a bank card is just an algorithm away from entering the 'log where you are' zone.
But then, we're all carrying cellphones right? :D
I suspect if your plate failed to read you may well end up being pulled over - not sure on the punishment.
The obvious solution of using another car's plate is defeated by noticing that a car appears to be driving on opposite ends of the country simultaneously :D