GVC has been quite consistent that marijuana impairs driving, and that people shouldn't drive while high.
I may have misread him, but SaltyDawg seems to think the impairment is not relevant because the behaviors of the high person will counterbalance the impariment. I don't have personal experience with this, but others who do seem to disagree.
Don't confuse the two positions; this is a relevfant difference, and distinct from the question of a legal limit used to model intoxication.
You're pretty close on my position, but that isn't exactly it. I think marijuana's effect on driving is so minimal it doesn't require a law to prevent it. I do believe that way too much marijuana, like everything else in the world, will have a negative impact on driving. But I don't think pot smokers hit that level regularly enough to worry about it. Conan has tried to make fun of this position, but having never smoked pot before he has no idea what he is talking about. He seems to think it's funny when I say someone who smokes way too much pot won't want to get up off the couch. This isn't a manual or a rule, it's just a fact about what smoking too much pot does to people. If he had ever smoked pot, he would know this.
Also, there are some studies that support my position that driving after marijuana is not a big deal. I posted a couple of links, not sure if you have seen them or not. One of them specifically said that police officers and driving instructors were not able to detect any impairment in the driving of people who had taken a moderate to high dose of marijuana. The study then suggested that a person with between 7 and 10 ng/ml of THC in their blood (which is double what conan is suggesting impairs your driving) drives with the same increased risk as a person who has been drinking but is still well under the legal alcohol limit (0.05%, which is roughly halfway to the legal limit).
So you were pretty close to my position, but not quite there. And conan is just out in left field on his. He hasn't posted one single piece of scientific data that even hints he might be correct. He's just repeating his opinion over and over and calling everyone a moron who disagrees with it.
If you have never smoked marijuana, and have no scientific data on the subject, you aren't qualified to call anyone a moron for disagreeing with you on the subject. I honestly think conan has no idea what being "high" actually is. I'm sure he's read about it, and I'm sure everyone has told him it was bad his whole life, but he has no idea what it is. He probably thinks it is a way bigger deal than it really is. He has made statements like "impaired is impaired" saying high from weed is just as bad as being drunk. Well anyone who has ever got drunk and smoked weed will tell you they are totally different "highs." One of them obviously impairs driving a lot more than the other.
It may not be a good idea to try to drive after marijuana, but I don't think it requires a law because it is not really putting the public in danger. Much like listening to loud music probably isn't a good idea, but shouldn't require a law.