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Difficulty: MediumBlood Alcohol Concentration (BAC) Limits and Thresholds

Match each driver category on the left with its corresponding statutory Blood Alcohol Concentration (BAC) legal limit on the right.

  • Adult driver (age 21 or older) operating a private passenger vehicle0.08% BAC
  • Commercial driver operating a commercial motor vehicle0.04% BAC
  • Underage driver (under age 21) subject to Zero Tolerance provisions0.01% to 0.02% BAC

Answer

Adult drivers operating standard personal vehicles correspond to a 0.08% BAC limit, commercial drivers operating commercial motor vehicles correspond to a 0.04% BAC limit, and drivers under 21 subject to Zero Tolerance correspond to a 0.01% to 0.02% BAC limit.
Each driver classification matches its statutory limit: standard adult drivers operating non-commercial vehicles are subject to 0.08% BAC, commercial drivers operating commercial motor vehicles are subject to 0.04% BAC, and underage drivers under 21 are subject to Zero Tolerance limits of 0.01% to 0.02% BAC.

Step-by-Step Solution

1
Determine the statutory BAC threshold for standard adult drivers (age 21 or older).
The legal threshold is 0.08% BAC.
Traffic safety law designates 0.08% BAC as the standard limit for adult non-commercial drivers.
2
Determine the statutory BAC threshold for commercial motor vehicle operators.
The legal threshold is 0.04% BAC.
Commercial vehicle drivers are subject to stricter regulations due to the increased safety risks of operating heavy equipment or passenger-transport vehicles.
3
Determine the statutory BAC threshold for drivers under 21 years of age.
The legal threshold is 0.01% to 0.02% BAC.
Zero Tolerance laws establish a near-zero threshold to penalize any alcohol consumption by underage drivers.

Key Concept

Statutory Blood Alcohol Concentration (BAC) thresholds across driver classifications
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Topics

Blood Alcohol Concentration (BAC) Limits and Thresholds

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