What is the "Per Se" limit for commercial vehicle drivers regarding blood alcohol content?

The "Per Se" limit for blood alcohol content (BAC) for commercial vehicle drivers is set at .04 or greater. This means that if a commercial driver has a BAC of .04 or higher, they can be considered legally impaired and subject to penalties, regardless of their actual ability to drive. This limit is lower than the standard .08 limit applied to non-commercial drivers, reflecting the increased responsibility and standards expected of commercial operators due to the potential risks associated with driving larger vehicles and transporting goods or passengers. A lower BAC threshold helps enhance public safety by ensuring that commercial drivers are operating their vehicles under optimal conditions.