I drove by the accident early this morning.  It actually happened closer to 3:30 than 4:30.  I have no idea about the specifics of this accident but I can tell you that when driving southbound about an hour earlier the construction zone created a very dangerous environment.  There were signs funneling 3 lanes into one shortly before E-470 but no signs stating it was a work zone, to adjust speed, etc.  On top of that, about 1/4 of the cones that were put out were laying in the active lane and workers were walking along the very edges of the lane.  I don't disagree with anything said above in the comments but question if the blame is entirely on the driver(s) in this case.