What is the legal limit for blood alcohol concentration (BAC) for CDL holders?

Answer: B — 0.04%

The legal limit for blood alcohol concentration (BAC) for CDL holders is 0.04%. This standard is established to ensure the safety of both the driver and the public, as commercial drivers are operating large, heavy vehicles that can cause significant harm if operated while impaired. A BAC level of 0.04% is considered the threshold at which a commercial vehicle driver is deemed to be legally intoxicated. This is lower than the legal limit of 0.08% for non-commercial drivers, reflecting the increased responsibility that comes with operating commercial vehicles. Maintaining this stricter standard helps promote safer roadways, as it emphasizes the importance of sobriety in professional driving, where the implications of impaired driving can be much more severe due to the nature of the vehicle and the potential for accidents.