I agree. That's the whole point of having a bumper. I remember hearing one reason for different car standards in the US and EU was the average height of a car

I agree. That's the whole point of having a bumper. I remember hearing one reason for different car standards in the US and EU was the average height of a car is much taller in the US, so the bumper has to be higher. There were concerns that a subcompact would go right under an SUV. Semi trucks should be a way bigger target; I would think they're in use more than a car, the average speed would be higher (since they're used more on highways), and the body style is more standard and less diverse.