The UK government has floated the idea of fitting GPS tracking devices into cars as part of a way to enforce road tolls, with a pilot project starting in a few years’ time before going nationwide. One can immediately see how civil libertarians might object to such a setup, given that it could further consolidate the surveillance state.
Even so, the idea of charging for road use has a strong free market pedigree, as the Adam Smith Institute blog makes clear here. Road toll systems operated by private firms need not necessarily involve the centralised data collection systems that our present UK government might favour.
One little detail of the ASI comment made me grin, in that apparently, road tolls in Hong Kong failed in the 1980s to become law because men feared the toll invoices would reveal they had been spending their evenings down the local bordellos. Okaaaay.