I mean, probably? That's a two-mode failure, so the generally correct engineering is to (1) not make things worse and (2) not worry about cost, because it's va

I mean, probably? That's a two-mode failure, so the generally correct engineering is to (1) not make things worse and (2) not worry about cost, because it's vanishingly rare. In this case, it's a "disabled vehicle in the road", which is not a new thing at all, and you rely on the existing infrastructure (tow trucks!) to handle it.