There's no two ways about it: travelling in rush hour traffic can be be boring. I'm lucky enough that my commute only takes me fifteen minutes or so, but sometimes even that measly quarter of an hour can seem to drag. As I usually travel on my own, I tend to pass the time in the car listening to the radio or singing along to a CD. It's also quite a good opportunity to people watch, as within the bubble of their own car, people tend to imagine that they're somehow invisible and behave accordingly. You see people applying make-up, having a shave, picking their nose, having an argument on the phone, kissing their passenger... all sorts of things.
Even so, it's still pretty dull.
Mind you, it might be tedious, but I think that the guy who overtook me this morning whilst reading the paper was taking things too far - he was literally holding the newspaper up with both hands in front of his steering wheel as he came past me.
I would have tried to stay alongside him for a while, but it was yesterday's paper and I'd already read it.