Driving along the freeway as I often do, I have found that traffic seems to clump together. Every quarter mile or so, there will be a little bunch of cars, all tooling along, slowly accumulating cars from behind as the clump moves forward at approximately 85% of the cruising velocity of most cars on the road.
Weaving through traffic (like a madman, probably), you can get out in front of that clump, and then shoot another quarter mile at a normal speed before you find another clump.
The interesting thing is that every single clump, every single time there is an inexplicable backup on the freeway, it is because of a car with a Pennsylvanial license plate doing fifty-five in the far left lane. Is there some sort of extra, hidden, curriculum in the Pennsylvania driver education system? "Do not respect the passing lane! You must Impede Traffic! Do it especially while you go to Delaware to purchase items with no sales taxes! Travel to and from your shopping expeditions in the left lane, slowly!"
I just don't get it.