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The Excavator had an extra long stick / boom for reach. While the excavator itself isn't that big, the boom probably should have been removed for transport. Or the lowbed trailer was too short to get it to lay down and still be on the trailer.
Heavy haul permits will map out a route (if they were required?) having the load exit the fwy before low bridges are encountered.
The high point on the boom where it has the knuckle / joint snagged the bridge, that looks like older construction.
That caused it to raise even further up into the bridge while also pushing down on the trailer all at the same time.
Looks like the rookie / driver was moving along at a pretty good clip. I wouldn't be surprised if the the trailer broke away at the fifth wheel and he kept moving ?
Let see, 60 MPH ? and 80,000 pounds ? stopping in say 10/15 feet and you didn't know it was coming.
The ultimate Knucklehead wake up call. Probably just a Rookie.
He will probable duck everytime he sees a bridge for the rest of his life.
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