Blood test is better for weed. It's only detectable for 12h vs 24h with saliva.

But levels of THC aren't really correlated with impairment.

Can you hook a saliva test to a car's ignition system to only allow sober people to start the car?

Yes. I want to ban cars too.

I don't think this is "car brained". They're not saying anything around public transit, just that we need to have a test for DWI and weed. People shouldn't be jailed for 30 years regardless of the presence of the test or not, but we do still need some other test. Otherwise I guarantee that "don't drive while baked" will be the next infomercial you see in a few years.

I honestly ......... for calling me "car brained". That insult hurt me more than any other I've received. I want to protect pedestrians and cyclists from people driving cars under the influence. I want to limit driving people's freedom to make life better for everyone.

Blood THC levels aren't indicative of impairment. Even high levels are only weakly associated with impairment in occasional users, and there's no correlation in regular users.

Elderly people shouldn't be allowed to drive.