ELDT Class B CDL Practice Exam – Prep, Study Guide & Practice Test

The maximum allowed Blood Alcohol Concentration (BAC) for commercial drivers is 0.04%. This regulation is in place to ensure safety on the roads, given that commercial drivers operate larger vehicles and often carry passengers or hazardous materials. The 0.04% limit is stricter than the general legal limit of 0.08% for non-commercial drivers, acknowledging that impairment affects a driver's ability to safely control their vehicle, which could have severe consequences in commercial driving scenarios. This standard reflects the industry's commitment to safety and responsible driving practices.