Zero tolerance for people 21 years old and under, for novice drivers, and for commercial drivers form part of the Wynne government's toughening of drug-impaired driving laws.
The government says zero tolerance means that drivers should not get behind the wheel if they have any detectable presence of either drugs or alcohol in their system.
An announcement on Monday said the federal government in the coming months will approve a screening device for cannabis and set the thresholds for its detectable presence.
Ontario also proposes to increase monetary penalties for all drivers who fail or refuse to perform a sobriety test.
Twenty-nine per cent of all road fatalities in Ontario in 2014 involved a driver impaired by drugs or alcohol.
The province recently became the first in Canada to publicly announce a plan for regulating federally-legalized cannabis. The elements include setting a minimum age (19) and establishing a network of stand-alone sales outlets operated by the LCBO.
The Canadian Automobile Association applauded the province for Monday's announcement.
In a statement, it said it mirrors recent research conducted on behalf of CAA by the polling firm Ipsos.
The survey showed that two out of five current cannabis users in Ontario have operated a vehicle while under the influence of marijuana.
Seventy-one per cent of participants said cannabis is as dangerous to road safety as alcohol impairment and distracted driving.
