The United States is a huge country and lots of people take road trips with 5-6hr drives. If you live in California you can easily do 5+ hours and not even leave the state.
On most people almost never make such drives. This has been pretty well researched. And those that do most of the time stop and make 15min breaks at least.
So the whole issue is that on very, very long drive you might lost 15min. That not the end of the world.
