Jo ma, the payment mechanism that you have mentioned is good and workable in Qatar as well.

As most of the people would avoid the toll roads, the traffic on them would be thin, thus allowing the needy road users only to use the toll roads.

Take the example of City Center, where finding a parking was a big issue, people have to roam and roam, and now with the small fee, see the difference, you can find parking any time there.