But I guess the nice thing about driving a car is that the physical act of driving itself occupies a good chunk of brain cells that otherwise would be giving you trouble overloading your thinking. New scenery continually erases what came before; memory is lost, shuffled, relabeled and forgotten. Gum is chewed; buttons are pushed; windows are lowered and opened. A fast moving car is the only place where you're legally allowed to not deal with your problems. It's enforced meditation and this is good.