A substantial number of these crashes (maybe the majority?) are rental trucks, being driven by people who aren't accustomed to operating a large vehicle. A typ

A substantial number of these crashes (maybe the majority?) are rental trucks, being driven by people who aren't accustomed to operating a large vehicle. A typical driver of a car, minivan or SUV in the United States will virtually never encounter a bridge or other obstacle whose height above the road is low enough to matter to them, so most people simply never have a reason to pay attention to those height signs.