For example, Highway 1 is a beautiful drive, but it's often kind of ruined by idiots in minivans driving 5 miles below the (already low) speed limit and being too rude and self-centered to pull of into a stopping lane and let the dozens of cars behind them pass.
If, for example, on Saturdays the 1 was restricted to people with a "reasonably competent" license (indicating that you're willing and able to safely drive e.g. within stated speed limit to speed limit + 10mph), with ticketing expected for people driving too slowly, that would be awesome.
You could have further refinements along the lines of once a month the road is restricted to people with "very competent" licenses, indicating that they intend to drive high-performance vehicles at high speed.
I think the social utility of this kind of policy would be very positive. The negative externality to mediocre drivers of not being able to drive on scenic routes occasionally isn't very large, but the benefit to good drivers would be huge!