I was traveling the Interstate today and saw an over-sized load with escort front and back. The front vehicle had the mast that checks for bridge and overpass height on it. The truck was not that far behind. My question is, what if the front vehicle finds a structure that is too low for the load, what do they do? This truck had already passed the last interchange (by a mile or two) and the median (or medium as you hear quite often ) was such that he could not drive through it to reverse route.

Does the load become a new tourist attraction where it sits, or does the driver hope his back up skills are perfect?