I have seen two here in Louisiana, one in Shreveport and one in Alexandria, they are way too big to drive on the road... Like a large Camper home with a lift... really big...
I saw this thing in person and it may be the baddest truck on the planet. The driveshafts on the thing were like 6 or 7 inches in diameter. I am 6'1" and my head only came up to the lower part of the door!