I don't agree with all of these new laws in regards to driving while high. You can disagree all you want, but weed is on a much lower scale than alcohol in terms of how much it will affect your judgement and impair your ability to properly operate a motor vehicle.
For example....I drink 8 beers in 3 hours...won't be able to drive for hours, or until the morning after as you will still feel affects. Now with weed, I can smoke a joint and feel completely fine after 1 hour. This is where I am really confused. How long does the "ng %" stay in your system?
I have been smoking on a daily for 15+ years and never have the cops cared enough to take my personal weed or do anything when getting caught.
If you are that paranoid and are driving/riding after smoking, take a couple big sips of Coca Cola and swish it around in your mouth. It will kill everything in your mouth and 95% of what would have been in your saliva will be deteriorated (at least this is what I've been told).