What is the legal BAC limit for drivers under the age of 21?

The legal blood alcohol concentration (BAC) limit for drivers under the age of 21 is 0.00%. This means that it is unlawful for individuals in this age group to operate a motor vehicle with any measurable amount of alcohol in their system. This zero-tolerance policy is in place to discourage underage drinking and driving, recognizing that younger drivers may have less experience and judgment when it comes to drinking and driving. The emphasis on a BAC of 0.00% aims to enhance safety on the roads by preventing any alcohol-related impairment among younger drivers, contributing to lower rates of accidents and injuries within this age group.

Other BAC limits, such as 0.08% or 0.05%, refer to the legal thresholds for adults and drivers over the age of 21, where some minimal level of impairment can be tolerated, but this does not apply to those under 21. The 0.01% limit is also often considered as part of graduated licensing laws but still supports the overarching goal of refraining from alcohol consumption entirely before driving for this age group.