It might have its merits in places where the building or enlarging of new roads are impossible. Everywhere else it is just a new way to scrounge more money from taxpayers.
Instead of spending money towards feasibility studies, it would be time to spend it in order to force the government to reduce drastically its spending, especially on stupid things like wars abroad and feeding a corrupt system on all levels.
The US with Canada and Australia are probably the only countries in the world that do not need to worry about lack of space. THERE IS enough money around to build highways.
Certain cities like NYC o Boston could in the same way as certain German cities, create huge pedestrian zones, accessible only with public transport. It works and could be done in the US as well.
No to FC tolls and exclusive lanes.