Would be nice if people didn't need smurfing cars in the first place but this is the U.S., apparently we can't have a decent train system because freedom.
Depends on the proposal but usually. I would have it replace almost everything except things like health care where the price is unpredictable, unevenly distributed, and not accountable to personal merit. Those things would be subsidised separately by taxes along the lines of the French model, which is free market but subsidised by taxes. I can't think of anything else that would go along those lines except maybe education, but there might be something that I haven't thought of.