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Difficulty: EasyBlood Alcohol Concentration (BAC) Limits and Thresholds

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

  • Drivers under 21 years of age (Zero Tolerance law)0.01%0.01\% or 0.02%0.02\% BAC
  • Commercial vehicle drivers operating a commercial motor vehicle0.04%0.04\% BAC
  • Standard non-commercial drivers aged 21 or older0.08%0.08\% BAC

Answer

Drivers under 21 match with 0.01%0.01\%-0.02%0.02\% BAC (Zero Tolerance); commercial drivers match with 0.04%0.04\% BAC; and adult non-commercial drivers match with 0.08%0.08\% BAC.
Each driver classification maps strictly to statutory legal BAC limits: underage drivers under Zero Tolerance laws match 0.01%0.01\%-0.02%0.02\%, commercial drivers operating commercial vehicles match 0.04%0.04\%, and standard adult non-commercial drivers match 0.08%0.08\%.

Step-by-Step Solution

1
Determine the statutory BAC limit for drivers under 21 years old.
Underage drivers fall under Zero Tolerance rules with a legal limit of 0.01%0.01\% or 0.02%0.02\% BAC.
Traffic safety laws maintain strict zero-tolerance enforcement for underage drivers.
2
Determine the statutory BAC limit for commercial drivers operating a commercial vehicle.
Commercial vehicle drivers have a legal threshold of 0.04%0.04\% BAC.
Federal and state regulations set a stricter limit for operating heavy commercial vehicles.
3
Determine the statutory BAC limit for standard non-commercial adult drivers aged 21 or older.
Standard adult drivers have a legal limit of 0.08%0.08\% BAC.
This is the standard statutory per se impairment threshold for adult non-commercial drivers across all states.

Key Concept

Statutory Blood Alcohol Concentration (BAC) thresholds by driver classification
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Topics

Blood Alcohol Concentration (BAC) Limits and Thresholds

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