I don't feel one can categorically call it an "unsafe distance". Less safe, sure. As mentioned his counterpoint is that he'd sleep better at home, so the next

I don't feel one can categorically call it an "unsafe distance". Less safe, sure. As mentioned his counterpoint is that he'd sleep better at home, so the next day he'd be more rested than he currently gets when he has to sleep in his cab. So in effect it's trading less safe driving today vs less safe driving tomorrow. Anyway, I'm not at all against regulations in this field. Drivers have been overworked hard and a tired driver on the road, regardless of occupation, is dangerous.