SA is modeled after an American state design, specifically California, and within the states it is entirely unheard of to see tolls located on backroads.
The removal of tolls would not entirely remove the toll system, but rather remove illogically placed tolls. This would keep tolls are places where they would exist within reality as tolls provide no real benefit other than to police which again, isn't really the type of benefit to promote.
We would keep tolls on highways, interstates, and key junctures. "But wait wouldn't that force people to avoid tolls?" Yeah probably, I mean honestly we do this IRL, the GPS even has an "Avoid toll roads" option - for a reason. It depends, either pay a small fee for the convenience of time and shorter distance or go a bit out of your way to avoid the toll.
The choice is yours though.