I assume a change of scenery and being left to your own thoughts without distractions is a factor. anecdote Driving into the countryside helps me string together plans better than sitting in a room and blankly staring at a screen.

The study in TFA was conducted with treadmills. So you could not get the same benefits by just sitting around in a moving vehicle. I'm pretty sure that increased blood flow through the brain is responsible for the effect, so you could also try some other forms of exercise.