Posted by bookofjoe 12/20/2025
For drunk drivers it’s rather easy to assess whether someone is impaired. With marijuana it’s not. So until we have a valid method of testing if someone is “too stoned to drive” we have to push back on any attempt to classify marijuana users as ineligible to drive.
> With marijuana it’s not. So until we have a valid method of testing if someone is “too stoned to drive” we have to push back on any attempt to classify marijuana users as ineligible to drive.
I agree. As someone who regularly consumes 250mg of edibles daily at a minimum, I’m sure my levels would be off the charts on a constant basis, even when sober. With the tolerance I currently have, it’d take a ridiculous amount to put me into a state where I felt driving wasn’t safe.
Thankfully society didn’t make exceptions. Eventually.
I see THC taking the same, slow, tortured approach.
Anecdote, I'm a user, by choice, and by habit/addiction. I was first exposed to it through, oddly enough, martial arts as a young teen. The punk rock scene of the 90s didn't help much either. Both me and my ex-wife were what you would call "techno-hippies". We would smoke as much weed as we could, and I would code and she would do her thing (she was a biologist so I have no clue, something genes). We had a rhythm and we liked the high grade one hit and you're good kind of marijuana.
When 2018 came around, The Farm Bill (tm) passed and it loosened the terms of what "hemp" was. The budding cannabis industry saw this as an opportunity to mess with genetics. They discovered that if you harvest early, immediately freeze it, D9-THC doesn't convert from it's precursor - THC-A. So then they started shipping "hemp" in the form of THC-A all over the states. All you have to do to "finish" the process is to decarboxylate it into D9-THC. However, there's also D8-THC which doesn't get you nearly as "high" and only lasts minutes. It, too, can be frozen to prevent it from converting from it's precursor - THC-A... What?!? So you really don't know whether it's D8 or D9 from the dispensary (and neither do they) and the quality is all over the charts.
I think this is why it's affecting driving so much. People who are used to the smoke shop D8 weed get their hands on some real D9 and it blows their minds.
God I wish we had a breathalyzer test for D9-THC. Without it, it's going to get legislated to the point where you're on the disabled "can't drive or operate any machinery, ever" list. You already give up your right to own a gun when you sign up for medical marijuana. (and when buying one, it asks you if you use...)
I'm definitely for making the roads safer, but I'm also pro-rights and liberties so this one is hard for me. Yes, there should be some legislation around marijuana, no it shouldn't be a schedule I-III but looked at like hops and barley. Tax the shit out of it. Like you do cigarettes. Don't prevent me from driving because I smoked a cigarette.
Also put a stop some of the bad actors and bad behaviors of growers (all night daylight…).
And punish illegal users regardless of intoxication level. Medical users should just abstain from driving while in it.
You’re not really going to win anybody over to the legalization side when you basically say that people can consume as much THC as they want and drive without any penalties because of testing limitations.
Just one example of many:
Her attitude when asked to perform the field sobriety test was taken as a refusal and she lost her license, now with a DUI on her record.
We all like to think that these methods work, and they do most of the time, and yet there still are cases where a normal person is subjected to them and they deem them "unworthy" to pass.
"Say your ABC's backwards starting from Z"
Literally in the summary
> While blood alcohol content (BAC) level represents an accurate measurement of alcohol impairment, the presence of THC in a driver’s body has not been shown to be a predictable measure of cannabis impairment.
But further on
> Because THC in the blood can result from both recent as well as past use, impairment cannot be inferred from blood levels.
Which other, less invasive methods cannot. Like alcohol, impairment is highly individual and so we set a threshold.
I agree we need to set a threshold for impairment. I just want that to be measured reliably so that people who had a brownie last weekend aren't getting in trouble.
Now blood tests show a 12-24 hour window of usage. Much tighter than the 2 to 30 days of other tests. In terms of window of time, that’s essentially good-enough.
Of course anyone who consumes cannabis has a strong desire for a tighter and more accurate test, but you’re really fighting against growing masses of irresponsible users.
If the problem is truly wide-spread like alcohol was (and still is), it’s just a matter of time before states or feds push for a good-enough (for the rest of us) solution.
I know this is a giant hairball and the downvotes and passionate discussion is why I said what I said but in the end, until we have a breathalyzer for THC, it is what it is.
I used to bike-ride a lot, but the number unaccountable drivers and the increase in dispensaries in the NYC tri-state gave me pause.