You know you are getting bored when you start taking photos of the GPS showing a straight stretch of road in front...and all you can see out the windscreen is a straight stretch of road.
This is not the longest straight stretch that I have had to deal with. That would be the Nullabor, where it got boring enough to tilt the drivers seat back as far as it would go, put a brick on the accelerator and steer with my big toe.
For about an hour. Anything to break the tedium.