I'm french, I really don't know how the US are going to get out of cars, it's going to be incredibly hard or impossible. Mandatory ride sharing by taxing gas,

I'm french, I really don't know how the US are going to get out of cars, it's going to be incredibly hard or impossible. Mandatory ride sharing by taxing gas, or heavily subsidizing public transport? Uber would have an unique opportunity to group rides for small busses.