I was thinking the same thing. That's not a small vehicle. I don't know if there's enough space for it to have spun around if it was trying to make the sharp turn from the inbound lane? Real head-scratchee.

Addendum: I drive that way to work. Maybe there are skid marks or something.

I drive that road into downtown every day. Good luck getting over there, except maybe in the middle of the night. Better luck taking the 7th Ave exit and making a U-turn.

"Century III... Chevrolet..."

You know you just sang the rest of the jingle. Don't lie.

First thing I think is: what's the posted speed limit, and how fast are they actually going?

This is a construction zone we're talking about. Limit should be dropped, maybe doubly so for trucks. On 79SB just past the Coraopolis exit, there's an S-curve with very obvious signage for trucks to limit to 45mph. If I saw a truck flipped in that stretch, my first thought would be they took a turn too fast.

If the problem is the lane and not the speed, put up one of those "no trucks X lane" signs. This shouldn't be a hard fix.