AA believes it'll be difficult to conduct the new roadside drug tests at the same volume as alcohol tests.
From December, Police across Wellington can do random roadside saliva tests – screening for cannabis, methamphetamine, MDMA, and cocaine.
The rollout will begin throughout the rest of the country from April.
Drivers testing positive will need to do a second test that checks for 25 substances.
AA Road Safety Spokesperson Dylan Thomsen told Ryan Bridge the test takes three to five minutes to complete.
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