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Difficulty: MediumBlood Alcohol Concentration (BAC) Limits and Thresholds

Traffic safety regulations enforce distinct Blood Alcohol Concentration (BAC) legal thresholds based on driver age and vehicle classification. Match each driver category on the left with its exact statutory per se BAC limit on the right.

  • Underage driver under 21 years of age operating a vehicleZero-tolerance limit of 0.01%0.01\% to 0.02%0.02\% BAC
  • Commercial motor vehicle operator driving a commercial truckCommercial operator limit of 0.04%0.04\% BAC
  • Adult driver (age 21 or older) operating a personal passenger carStandard legal limit of 0.08%0.08\% BAC

Answer

Underage drivers correspond to the zero-tolerance limit (0.01%0.01\%-0.02%0.02\% BAC), commercial vehicle operators correspond to 0.04%0.04\% BAC, and adult non-commercial drivers correspond to 0.08%0.08\% BAC.
Each driver category maps precisely to its statutory BAC legal limit: underage drivers fall under zero-tolerance rules (0.01%0.01\%-0.02%0.02\% BAC), commercial drivers have a stricter legal threshold (0.04%0.04\% BAC), and non-commercial adult drivers (21 and older) have a standard threshold of 0.08%0.08\% BAC.

Step-by-Step Solution

1
Determine the legal BAC limit for drivers under 21 years old.
Underage drivers are subject to zero-tolerance legislation set at 0.01%0.01\% to 0.02%0.02\% BAC.
Statutory rules strictly prohibit underage alcohol consumption prior to operating any motor vehicle.
2
Determine the legal BAC limit for commercial vehicle operators.
Commercial drivers have a statutory per se threshold of 0.04%0.04\% BAC.
Commercial vehicle operation requires heightened safety standards and lower BAC limits.
3
Determine the legal BAC limit for standard adult drivers (21+).
Adult non-commercial drivers have a per se limit of 0.08%0.08\% BAC.
This represents the standard legal threshold for adult passenger car drivers across motor vehicle laws.

Key Concept

Statutory Blood Alcohol Concentration (BAC) Limits
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Topics

Blood Alcohol Concentration (BAC) Limits and Thresholds

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