A gymnast doesn't do Newtonian physics in their head when they do a routine on the parallel bars or whatever. They know what their body can do and they do it. Driving is the same way. Spend all your time actually thinking about driving and you'll be paying more attention to your thoughts than to the actual act of driving. What nonsense! You know how far you can see, you can feel the road through the wheel, you feel the slight drift and response of the car from moment to moment - all sorts of little clues that let you know what is and isn't safe and most of them unconscious, just like any other physical endeavor.