• BitPirate@feddit.de
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    1 year ago

    The alcohol test is carried out using a breathalyser and, if positive, is confirmed by a blood sample. This works well because it measures the concentration of alcohol still in your blood. A positive test means that the driver is (still) drunk and not fit to drive.

    The test method for THC is not as accurate. A urine sample can still be positive 3(!) days after smoking a joint. This is even worse with hair samples or if the person smokes occasionally.

    Limiting testing to THC alone would be a sensible decision. At the moment they also test for THC-COOH, which is a metabolic by-product and lasts much longer in the body.

    Without a change in testing methodology, you could lose your driving licence on Monday because you smoked a single joint on Friday. A bottle of vodka on Saturday? No problemo.

    • Saff@lemmy.ml
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      1 year ago

      Interesting, thanks for the explanation. I’d been looking forward to it being legal here but not if it means I risk this. I guess it will be a few times a year treat if I’m spending a week off work at home just chilling out.