Interesting. Before I got my license, I was really worried I would have trouble focusing on driving. As it turns out for me I love doing it and actually seek it out. I kinda hyperfocus when I do it so I'm able to keep going for hours.
If anything, I feel refreshed after a nice drive. That said, if it's straight highway for hours it's a different story. I'll need to rest after a long road trip. Especially if it was understimulating.