The only people who get to play are the ones the government lets use the track. Even if they would let you play you need a lot of money up front.

Effectively closed market, high cost of entry, the gov demands money from them for the privilege so has an incentive to not bring prices down.... And if you choose not to use it the gov gets you again on fuel tax.

I suspect whatever the underlying economics were it would be expensive. It's essentially a monopoly with a, from an end user standpoint, perverse incentive structure.