Smart Car for Saving on Gas

What will the American highways of the future typically have driving on them? Since the future will see permanently high and possibly continuously rising gasoline prices, the American car buyer will look for something fuel efficient and cheap. It will have to be cheap to leave enough money left over to operate it. Being fuel efficient means being small. Every extra bit of weight needs fuel to haul it around. And the main purpose of a personal vehicle is to move the driver, not hundreds of pounds of plastic and metal forming the body of a large car. So we will probably see highways full of vehicles that look very much like the Smart Car in the video.