|
We've had 80-mph on IH-10 in western Texas for a while. 75-mph elsewhere. I will say that the traffic, already low, keeps itself spread out better with the higher limit. But, if you're running 65 (as I do in the Peterbilt) that overtaking traffic comes up quite fast so one has to be aware of the sheeple (asleep at the wheel) suddenly realizing they're about to hit a big bow wave from the 18-wheeler.
As said above, the "time savings" is all about having the TV remote in hand as soon as possible. And wearing out the car prematurely. Fuel mileage is just a measure of how lightly one treats the vehicle in getting a job done, not much of an end in itself as vehicle life is the paramount concern.
The high speed runs (above 60-mph) need to be in excess of 300-miles before the time versus fuel penalty favors higher speeds.
.
|