Actually the energy used would be reduced by quite a bit. They can drive in formation. This reduces energy expended by reducing drag. It also reduces congestion

Actually the energy used would be reduced by quite a bit. They can drive in formation. This reduces energy expended by reducing drag. It also reduces congestion. It is estimated that congestion wastes 2.4B gallons of gasoline in the US [1]. They can take alternate routes. And if we get smart traffic signals, then they wont have to stop as often by coordinating speed with the flow system. Not to mention eliminating people flooring it out of frustration. [1] http://dsc.discovery.com/cars-bikes/do-driverless-cars-offer-safer-and-more-efficient-transportation.html http://dsc.discovery.com/cars-bikes/do-driverless-cars-offer...