Hmm. That's a good point. I found this about DOT approved sleepers. I wonder how this stacks up to standard crash regulations.
Occupant restraint. A motor vehicle manufactured on
>or after
>July 1, 1971, and equipped with a sleeper berth must be
>equipped with a
>means of preventing ejection of the occupant of the sleeper
>berth during
>deceleration of the vehicle. The restraint system must be
>designed,
>installed, and maintained to withstand a minimum total force
>of 6,000
>pounds applied toward the front of the vehicle and parallel
>to the
>longitudinal axis of the vehicle.
