Ok so we’re looking at a bridge that fell onto road here. ..I think. Oftentimes in chaos it’s tough to sort out reality.
Here's another interesting photo/design/failure. Note the highway bridging behind the failed section, which appears to be of similar design, but it didn't fail.
The foreground on the right appears to differ from the rear by pinning in the highway on the right, while the left slabs slid off their corbels / ledger, sliding to the left and dropping off the ledger. Vehicles on the far lane drove off the elevated highway, while those closer slammed into the exposed ledger.