If you have a root canal on Tuesday and take a single lortab for pain and then hit someone on Thursday, when the cops do a blood draw you are going to be busted for driving while "intoxicated" even if the lortab effects wore of 48 hours ago. The burden of proof that you weren't high at the time of the accident would be on you. Put simply, there are consequences for using drugs.
I honestly don't know about that. I have no idea how long a lortab stays in your system, or if there is even a test to detect it. I have not researched any of that.
It doesn't matter though, because we're not talking about lortabs here, we're talking about a (theoretically) legal marijuana. You can't really legalize marijuana if it in fact is a huge danger on the roads and there is no way to test for people being under the influence when driving.
I'm guessing when you get a prescription for lortabs they tell you not to drive for 48 hours or whatever (if it will in fact get you sent to jail). But if marijuana was legal, it would still show up in your system several weeks or even months after using it- long after the affects have worn off.
Now if it is legal, and you are not under the influence when driving, then why should you go to jail for testing positive? And at the same time, if it's super dangerous to drive after using it, how can you legalize it with no way to tell who is driving after using it?
The people saying it's bad to drive but it should be legal need to ask themselves, how bad is it to drive and is it worth keeping marijuana illegal to make sure driving after using it is illegal, or is it worth legalizing driving after using it in order to legalize marijuana? Because you have to link driving with normal usage until there is a way to test for influence and not just detect it in your system.