Five and a half hours behind the wheel gives you time to think about lots of stuff. For example, just yesterday I was thinking that the penalty for doing 15 under the limit in the left-hand lane should be getting dragged out of the vehicle and beaten senseless with a lead pipe right there on the side of the road, pour l'encouragement des autres.
A little harsh for a first offense, maybe, but it would certainly discourage recidivism.
(To be fair, though, the person who triggered this train of thought may have set out for their destination back in '79 and didn't realize that the 55 MPH National Maximum Speed Limit had been repealed since they left. Boy, won't they be surprised when they finally get where they're going!)