"jamesgangnc" wrote
I defy anyone to drive any time at all with their left foot in the air
above the pedal. Whether they are aware of it or not, they _will_
have their foot touching the pedal.

Harry K

If you have your left foot on the brake you need to hold the foot up.
Resting the front of your foot on the brake pedal is riding the brakes
on many cars. After hours on the road you will relax those muscles.

As a practical matter, you don't hold your foot in the air, nor do you rest
in on the pedal. You keep your foot on the floor just like any other driver.
If you are in a situation where you "may" need the brakes at any time, you
can then elect to move that foot to a ready position, thus the faster
reaction time.