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idiosyncratic · 05-01-2013, 00:06

Without more details about how the new test works it is difficult to imagine how useful it will be.

The correlation between alcohol in the breath/blood/urine & driving impairment is fairly linear because alcohol does not persist in the body for very long & the assumption that if it is detected above the legal limits, it is having an effect, is well established.

I don't condone anything that impairs driving competence, but I would like to know how the proposed test has been 'calibrated' for the effects of recent cannabis use & the situation where I understand cannabis 'by-products' are detectable for quite a long time after the effects have actually 'worn off'??

05-01-2013, 00:06	#15
idiosyncratic Inactive Join Date: Dec 2012 Posts: 159	Re: Drug driving test given the go ahead Without more details about how the new test works it is difficult to imagine how useful it will be. The correlation between alcohol in the breath/blood/urine & driving impairment is fairly linear because alcohol does not persist in the body for very long & the assumption that if it is detected above the legal limits, it is having an effect, is well established. I don't condone anything that impairs driving competence, but I would like to know how the proposed test has been 'calibrated' for the effects of recent cannabis use & the situation where I understand cannabis 'by-products' are detectable for quite a long time after the effects have actually 'worn off'??