I wish. Unfortunately the moron causing the hazard almost never gets caught up in the resulting accident like you describe. What happens is you wind up with a

I wish. Unfortunately the moron causing the hazard almost never gets caught up in the resulting accident like you describe. What happens is you wind up with a merge (and all the shenanigans that causes) behind the blockage and given a long enough duration you eventually run into the case someone doesn't check their mirrors/blind spot and hits someone who's not on their A-game because there's no exit there and they're not expecting the person to merge there.