What is the legal blood alcohol concentration (BAC) limit for drivers over 21 in Montana?

In Montana, the legal blood alcohol concentration (BAC) limit for drivers who are over 21 years of age is set at 0.08%. This standard is widely recognized across many states in the United States and aligns with federal guidelines, reflecting a level where impaired driving is considered unsafe.

At this BAC level, individuals may experience decreased coordination, impaired judgment, and slowed reaction times, all of which can significantly impact driving abilities. Adhering to this legal limit is critical for maintaining road safety and ensuring that drivers are not a danger to themselves or others on the road.

The other options present lower or higher BAC levels which do not comply with the legal standards for intoxication driving in Montana. For instance, 0.05% may be a limit for certain types of driving or specific circumstances but does not apply to standard adult drivers. Higher limits such as 0.10% or 0.12% exceed the legal limit, indicating a more severe level of impairment and increased risk of legal penalties and accidents.