The curve where this accident happened, trucks have been rolling over there on a regular basis since the highway was built. I-35E (Then just I-35) was built through an existing city. Just like all urban freeways cut through existing cities, they have some pretty nasty curves in them. I-20 in Birmingham Al has a 90 degree turn in it where they had to avoid a cemetery that contains plots from the 1800's. But like all curves in interstates these are well marked in advance, people just don't pay attention or disregard the safe speed all together.

I don't usually gate cattle in the centers unless I have sorted cattle that can't be mixed or have a light load. I keep compartments full to keep them from wandering around on the trailer. One place I haul from, I have to use every gate in the trailer to keep cattle from piling up going up a steep hill. I have to have a tractor pull me up the hill with a log chain it's so steep. When hauling calves the trailer can get top heavy because in order to get 55,000lbs on I have to double deck the nose and stuff the doghouse full. She can get a little top heavy when I have cattle stacked into the rafters.