Once self-driving cars are proved to be able to support the entire population at reasonable levels of safety, privacy, efficiency, reliability, etc., over a lon

Once self-driving cars are proved to be able to support the entire population at reasonable levels of safety, privacy, efficiency, reliability, etc., over a long enough period of time (I'd say a couple decades), I would accept the _beginning_ of a conversation about only allowing self-driving cars (even then the only sane thing is to have specific areas like certain highways devoted to self-driving cars). Unfortunately, I don't really see how that can be proven without them actually doing it. If self-driving cars require 100% penetration before they are viable they are and should be dead in the water. I will not support the dismantling of our main transportation network on a pipe dream. The government has many ways to ensure that public roads are utilized more efficiently. A first step could simply be to increase taxes on gasoline (with increased equivalent taxes on electric cars). This would decrease the roads' utilization. They could also increase road-usage taxation that increases at higher levels of utilization. There are also many other actions that can be taken and none of them require a 100% conversion to an untested complete electric fleet of vehicles.