Within the next ten years the size, shape, efficiency, fuel and numbers of private automobiles is going to undergo a radical change. The nine million barrells of gasoline we currently use in the U.S. each day simply will not be available in the quantities desired at any price. If a transition to a more abundant fuel source than gasoline and diesel does not take place on a widespread basis before the shortages begin, there will be troubles. It is virtually certain that at some point the government will have to impose rationing that will keep functions vital to our society such as food, water, utilities and public safety functioning. The rest of us are going to have to find alternative means of transportation.