Mass x Gravity = Fail.
We've all experienced bad days at work, we'd guess none have come close to the wretched day this superload driver had. His unenviable task of transporting this rather gigantic beam was never going to be easy. It obviously can't fit on a standard trailer so he had wheels mounted to it in order to function as a trailer. However, roads just aren't designed to handle loads like this, and requires a highly skilled driver. It also requires escort vehicles, which is where this footage comes from.
The driver makes it through the first corner, but then proceeds to run into part of the center divider at which point physics takes over. This is a lot of weight to shift around, and it end ups tipping the truck like a toy. We think it's safe to say the road was closed for awhile.