Health committee  I'm in Toronto, actually, and it's mister.

Health committee  Yes. That was the B.C. roadside survey. There have been a couple of iterations of that. This was the 2010 version. It was random stops at the roadside. These were not drivers in crashes. It was determined with an oral fluid sample.

Health committee  A little bit, small problems.... It generally is pretty good but there are some false positives and false negatives, as with most tests.

Health committee  I just want to touch on one of the other areas in which we've done some work, and that is how we define harmful or problematic cannabis use. A national and international group I work with has looked at how we define this issue. I know it's an issue of concern for the committee.

Health committee  First of all, thank you for inviting me to speak to the committee. I'm an epidemiologist. My research in this area typically focuses on addictions and injury prevention. I have a particular focus on road safety and traffic safety. I'm going to speak to the issue of drug-impai