They are affectionately referred to as rolling road blocks. There's not much you can do about them, although once in my younger days I was behind two obnoxious old farts on the turnpike and I passed in the breakdown lane after following for a mile or so.
I've learned over time that backing off a bit will sometimes work. Although typically there's someone else in the right hand lane waiting to get by too, so, by backing off you risk them letting that person through while you get stuck behind again. On the other hand, riding their ass rarely works, along with flashing the brights, honking, rude gestures, etc.
Nowadays I'd suck it up and deal with it. IOW, I'd probably start having carmageddon day dreams to pass the time. Hoping that by ignoring them they'll get bored in their game and let people through.