[k-mcgrady]

Even if that's true the drugs effect is different on each person and the amount you take will vary the effect it has on your driving ability. A couple of puffs probably won't make a difference. But you can also take enough that it's hard to even get out of a chair. The easiest solution and one that should appease everyone would be a total ban on driving within 12/24 hours of last taking marijuana imo.

[McDiesel]

I get that... its a legitimate concern, as I said. However, its no more legitimate than the other 100s of prescription drugs that can cause drowsiness or slowed reaction time. Or driving with the flu, or driving tired.

Thats the point - there are literally 100s of other ways to be just as (if not more) impaired while driving and be completely legal. We don't parade those issues around (namely because the big pharma companies would like people to not realize just how impairing their products are)

The difference is that there is a large enough group opposed to legalization that they make this issue a primary one in their fight against legalization and blow it vastly out of proportion to the actual scale of the problem.

[lostcolony]

That's true with alcohol, too, though, it effects people differently. .08 was basically just resolving legal ambiguity by picking a reasonable BAC; it's not like at .079 you can operate a car safely but at .08 you're a danger to everyone on the road.

You can actually be arrested for an 'OUI' in some states, an Operating Under the Influence, for when you are clearly impaired, but fall below the legal cutoff for a DUI. This would likely necessitate being the same sort of thing, a legal recognition that you were driving recklessly, and you exhibit the signs of recent marijuana usage (or if we have some way of actually measuring it, then that too).

[bostonpete]

12/24 hours?? Have you ever smoked? I'd say the effects mostly wear off within 2 hours...

[Zigurd]

A total ban on driving for 24 hours is scientifically unsound, and would only play into fearmongers' hands who want more legally dubious checkpoints and reasons to do intrusive tests on drivers.