More nuke generators=a shift to battery operated cars. If the daily commute could be carried electrically rather than via petroleum, that would be a good first step. Next, convert the nation's railroad locomotives to electric power. This would back out a couple hundred million gallons of distillate each year. These might sound like wild ideas but $100/bbl crude is not too far off.
Well I do not know what the price of crude will be, but obviously the three main drivers of change are economic incentive, mature, robust technology, and political will.
These may now be coming together. As I said, "mixed approaches are the best way to go. You suggestions are good examples of this. Do not try a total, global solution - solve particular problems is ways that address the requirements of those problem's solutions. For my part, I am somewhat skeptical of the electrical, commuter car" concept, but the electrification of rail is long overdue.