Might have needed a WDH ?

Bub, are you sure they are facing the wrong way? It looks to me, judging by the angle of the light and the shadows, that this photo was taken in the winter, in late afternoon, with the nose of the truck pointing north. Probably on the east coast (judging by the topography). And I agree that this is a divided four lane highway, with the truck and trailer off on the right shoulder of the northbound lanes.

Good call on the deployment of the side curtains!

This amateur speculation is fun, but maybe the OP can give us more info about the location of the accident?