The implementation of roadside drug testing is being hailed as a huge step in the right direction. 

From December, Police across Wellington can do random roadside saliva tests – screening for cannabis, methamphetamine, MDMA, and cocaine.  

They'll spread to cover the whole country by mid-next year. 

Drivers testing positive will need to do a second test that checks for 25 substances. 

Drug Detection Agency Chief Executive Glenn Dobson told Mike Hosking data shows 30% of all road deaths now involve an impairing drug. 

He says it’s not going to be a game changer, but it is a massive move in the right direction. 

LISTEN ABOVE