South Australia · Learner's Theory Test practice question

How much THC (cannabis), methamphetamine, MDMA or cocaine needs to be detected in a roadside saliva test for you to commit a drug-driving offence?

Enough to clearly impair your driving
An amount above a prescribed legal concentration, like alcohol
Any detectable amount at all
It is only an offence if you also crash

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Correct answer: Any detectable amount at all

Unlike drink driving, there is no legal threshold for these drugs - the presence of any detectable amount in your saliva is an offence. SA Police roadside tests detect THC, methamphetamine, MDMA and cocaine.

Source: Service SA – The Driver's Handbook

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How much THC (cannabis), methamphetamine, MDMA or cocaine needs to be detected in a roadside saliva test for you to commit a drug-driving offence?

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