That's just dumber that dirt.
Very inefficient, time wise. My time is worth much more to me than the cost savings derived from driving @ 55. And anyway, whether or not I drive 55, with my Jetta TDI, there is no appreciable difference in mileage. I get approx 45 MPG on trips driving @ 80 MPH.
We recommend that Hillary and friends fly their jets at 55 mph maximum, too.
from 40,000 feet.
8-)