That approach is solid. That's how everyone is on the roads, and there aren't many crashes when you think about it.
When I see an area of the road that could benefit with a fast lane added, I'll suggest it and try to explain why it would help. Certainly don't expect everyone to travel on it though. And I know some might attempt it but just end up slowing down traffic. Of course not everyone can use it, for that would clog the lane and people might complain. But then I'll just point at the other lanes and recommend those be used to go fast. Not a fan of rigid guidelines. Just keep it simple. Expect roadblocks. Use detours.
Don't mind just sitting here watching the cars drive by either. Whatever happens, happens.