I've heard (could be rumor) that the "high speed highways" in Japan are toll roads with tolls so high basically nobody uses them. Maybe that's an example?
The privatization of the expressways was pretty much enabled by the viability of the rail networks, which are also mostly privatized, mostly profitable, and extremely well-built.
Unless maybe I failed to make clear that the standard deductible's job is to represent car+gas+etc costs.
They are really competing with trains. Even if they were free.