That's why I think we should look for some sort of acuity-based test. We need to devise some task that tests attention, reaction-time, etc and use that as a bas

That's why I think we should look for some sort of acuity-based test. We need to devise some task that tests attention, reaction-time, etc and use that as a basis for whether you are too impaired to drive. It has the added benefit of also being applicable to tired-driving and medicated-driving (non-mmj medicated, think cold pills).