The current point eight level on alcohol is a good approximation of effect versus amount. Little more or a little less, you know someone seriously affected unless they have a high tolerance at that level.

Cannabis is all over the place. I fully accept no one should be driving for the first several hours after smoking, possibly 8 to 12 hours after an edible, the current test had no way of figuring out that timeline.

They can tell if you smoked in the last 15 minutes or they can tell if you smoked in the last month. That's it.

Just like there's no oxycodone level for impaired driving, simply if you have a prescription for it it is your choice to make that decision, cannabis falls in that. The difference is oxycodone is prescribed and it will be up to a cop to say if you were driving dangerously. How do you apply that logic to starting the car up?

And I know there's logic or reaction puzzles you can force upon people and determine whether or not their reaction falls within reasonable guidelines. How do you force the vast majority of the population to go through that every time they start their car up?

And imagine the kids screaming in the backseat as the frustrated mom is trying to do the puzzle.