Shannon Cox will spend at least eight-and-a-half years behind bars after admitting to unlawfully killing Thelma Clausen and Coral Seinor after he fell asleep at the wheel and crossed into the path of oncoming traffic.
His arrest over the women's deaths was the third time in two years he had been caught driving with methamphetamine in his system, and while on bail for the manslaughter charges, he was again caught using the drug.
"The impact of your offending has been devastating," Justice Lemonis told Cox.
"This offending has tragically come about because of your addiction to methamphetamine."