Mr. BEN HOCKSEY (Engineer, Eaton Corporation): Most of the energy used in a vehicle - the reason we have big engines in vehicles is to accelerate them up to speed at a reasonable pace, and then you only use a fraction of the power when you're going down the road.

NPR: UPS to Test Hybrid Vehicle in Detroit

You'll see that they will use technology to speed up design.

NPR: Closing the Tech Gap at Ford