At what blood alcohol concentration (BAC) level are you considered DUI when driving a commercial vehicle?

In the context of driving a commercial vehicle, the legal blood alcohol concentration (BAC) limit that designates a driver as being under the influence is 0.04%. This standard is put in place to ensure higher safety measures are upheld for commercial drivers, as they often operate larger vehicles that can pose a greater risk to public safety when operated under the influence of alcohol.

Unlike personal vehicle operators, who are generally considered DUI at a BAC of 0.08%, commercial vehicle drivers are held to stricter standards due to their role in transporting passengers or goods. This lower threshold reflects the importance of maintaining a higher level of sobriety in order to adhere to safety regulations and prevent accidents on the road. Therefore, the correct answer indicates a level of intoxication that is legally recognized as dangerous for those operating commercial vehicles.