Australia is one of the top toll roading countries. Sydney had most tolled roads world record for awhile not sure who holds it now. I don’t know whether it is the state or private companies who operate them.

Since you live in the area, and are talking about toll roads, I assume you also probably know of the name Cintra, who are Spainiards. And Cintra is, in fact, a private toll road operator who has owned roads around Austin previously