Even outside the US this is true. I live in Lithuania and a couple years ago I started noticing cameras along the side of most highways. They've now started usi

Even outside the US this is true. I live in Lithuania and a couple years ago I started noticing cameras along the side of most highways. They've now started using them to enforce average speeds, but to everyone here it should be pretty clear they are tracking the movements of vehicles (whether intentional or not is a different question). A lot of other European countries have automated toll roads (sometimes just for HGVs) which do the same thing.