That saved us. You don't know what will happen if a guy like that is loose in the cabin.

Conventional wisdom has always supported that when there is a crash with a large truck and a car, it's usually the car that causes the crash. If anything, this study shows the causation is more equally distributed than we first thought.

Now we recognize we need to spend more time on driver-behavior safety programs. Driver performance is playing a far greater role in contributing to crashes.