Dave is still up working

It is 9:15 AM on Friday. He has not slept again!!! This is getting really out of hand. He started last night before dark and is still out there. He keeps saying he is almost done. Here is what concerns me - he is supposed to drive into work with only 3 hours of sleep in the last 48 hours and very little any other night previous to that. So that is dangerous - then he is planning on driving his truck with a camper on it and pulling a trailer with his jeep on it for over a 3 hour drive - with less then 3 hours of sleep in the last 48 hours. I just think it is really to dangerous so I am trying to tell him to stay home and sleep!!!