Killers With Cell Phones

You can see them everywhere - truck drivers, holding a cellphone to their ear, with the other hand on the steering wheel. There is all kinds of talk on the news and in private conversations about dangerous teenagers, talking and texting behind the wheel, but you don't hear so much about semi truck drivers doing the same.
Several states are trying to solve this by imposing fines on drivers caught using a handheld phone, but that must be hard to achieve when the trucks are zooming at 70+ mph on the interstate.