I think I see what he means is, what path could a double-trailered truck take to end up there? I'm guessing they don't back up so well, so he must have come off that bottom cloverleaf making as wide a left turn as possible to rest at the curb.

But what is that stump even for? There's a left-turn lane, why does traffic need the 'jughandle' (as we called them in NJ)?