Autonomous driving technology could cut down on vehicles' weight - and therefore improve fuel efficiency.
By Doron Levin
FORTUNE -- Earlier this month, President Obama proposed spending $2 billion over the next decade to find an alternative to operating cars and trucks on oil -- an idea that has been catnip to the political class. Previous presidents and congresses have sought favor with voters by spending on gas-electric hybrids, biofuels, advanced MORE
