Logging truck rollover video

We just had this last week near my house. Not sure if the driver took the corner too fast or if it was a combination of things. Where the photographer is standing is a traffic control light for a major intersection in my town. The driver had been turning right into the lane he is seen in here.

 

It's possible that corrosion(salt corrosion/old age,possibly a maintenance issue)could've caused that axle to let go(although the truck did look like it was "running away" a little down the hill before it wrecked at the curve). Interested to see what the subsequent investigation turns up.