Result: Driving drunk, with a cellphone or with a hands-free phone were all equally dangerous. Also driving while short on sleep. IIRC it's something like ~20

Result: Driving drunk, with a cellphone or with a hands-free phone were all equally dangerous. Also driving while short on sleep. IIRC it's something like ~20 hours awake approximately matches .08 BAC, not sure offhand how chronic sleep deprivation (like most adults have) factors in. (My conclusion from all this is that alcohol should not be treated as a special case: if you can't drive safely, proving that it must be for some other reason shouldn't get you out of trouble.)