A strict zero-tolerance policy means no alcohol consumption is permitted for these specific driver categories. This rule aims to enhance road safety, especially for those with less driving experience or who operate commercial vehicles.

Drivers under 21 and all novice drivers must have a BAC of zero when operating a vehicle. Even a small amount of alcohol violates the zero-tolerance policy and results in immediate roadside penalties.

Commercial vehicle operators are subject to a zero-tolerance policy. Any detectable BAC, even below 0.05%, results in an immediate suspension to maintain road safety standards.

The warn range is not a criminal level but still triggers roadside penalties such as suspensions, fines, and remedial programs to discourage impaired driving.

This falls within the warn range and results in administrative action, including a license suspension and a financial penalty, even without a criminal charge.

Levels at or above 5 ng are considered criminal. Drivers with 2 to 5 ng may still face lower penalties. Cannabis is treated similarly to alcohol under Ontario law to maintain public safety.

Ontario enforces zero tolerance for young and novice drivers. Even minimal cannabis presence results in immediate administrative action, regardless of impairment signs.

These drivers are not bound by the zero-tolerance policy unless they operate commercial vehicles. However, they are still penalized for warn-range or criminal levels.

The warn range is taken seriously in Ontario, with administrative penalties applied immediately at roadside to deter risky behavior.

Repeat offences in the warn range escalate penalties. A second offence leads to a longer suspension and potentially additional consequences like remedial programs.

Crossing the criminal threshold triggers a 90-day administrative suspension, even before a court hearing, to protect other road users.

In addition to losing driving privileges, your vehicle is impounded on the spot for a week when caught with a BAC of 0.08% or higher.

Even small amounts of alcohol can distort your vision, slowing reaction times and making it difficult to judge speed or distance accurately.

Any detectable alcohol for zero-tolerance drivers triggers an immediate suspension to reinforce safe habits during the learning phase.

Cannabis impairment is treated on par with alcohol in terms of legal penalties. Driving under its influence results in license suspensions and possible criminal charges.

Very high BACs indicate extreme impairment. Ontario imposes much harsher sanctions, including longer suspensions and mandatory treatment programs.

Because commercial drivers operate larger and riskier vehicles, Ontario holds them to stricter standards with instant suspensions for any BAC reading.

Repeated zero-tolerance violations trigger escalating consequences, including longer suspensions and a requirement to install an ignition interlock system.

Even slight impairment can affect decision-making and reaction time in newer drivers. Zero tolerance helps ensure safety while they gain experience.