His point was more that during that time, he had an opportunity to practice focus/concentration, and this helped him to reduce distractions throughout the rest of his day. You should be able to practice focusing in any situation where you are doing something rote and physical for more than five minutes, where your mind has a chance to wander towards more exciting or random things. Try it during handwashing dishes, washing your car, mowing the lawn, and other chores that do not require a significant amount of your attention.
Also, please focus on the task at hand when you are driving. :)