Truck falls victim of the famous bridge in the US 2015 video

That by the summer, he had managed to "beat" 4 of trucks and their drivers who considered fit ... Well, it could fit. He attracted no nor the truck will see in the video below. I can not understand where this comes the confidence of drivers. Up and I live on the other side of the world I have learned that this bridge is low and the next time I find myself in Massachusetts, will watch. Those that can not read warning signs