Well, Mr. Boissonnault, I would say statistically—or at least this is what the research says—that the greatest deterrent to impaired driving is fear of getting caught. So, I don't know what the policy answer to that is. They usually say it's high-visibility enforcement, which means law enforcement that is trained and on the lookout for impaired drivers. I think perception is a huge issue in all of this. You know, one of the difficulties with the marijuana legalization question, I think, in many polls in the United States—I don't know what the polling is in Canada—is that the public is supportive of this. It might just be a few percentage points, but it's starting to tip where more people out there are in support of this.
What I would say to you is that the big challenge is that the policy of legalization is outstripping the science. So, there are a lot of questions out there related to public safety—and that can extend to medical efficacy and all these other things involving marijuana—but it becomes difficult to answer these questions. So, looking at alcohol impairment, the deterrent is there, but I think education.... One of the witnesses alluded to edibles, just the way that people take them, the way they process, delayed onset. I would agree with Dr. Kelsall that the public needs some information too, so that they can make wise decisions.