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Difficulty: EasyBlood Alcohol Concentration (BAC) Limits and Thresholds

For drivers aged 21 or older operating a standard non-commercial passenger vehicle, at what Blood Alcohol Concentration (BAC) level are they legally considered driving under the influence (per se limit) under standard traffic safety laws?

  1. 0.08%Answer
  2. B
    0.04%
  3. C
    0.02%
  4. D
    0.10%

Answer

A Blood Alcohol Concentration (BAC) of 0.08%
For drivers aged 21 and older driving a non-commercial vehicle, standard statutory traffic safety laws establish a Blood Alcohol Concentration (BAC) of 0.08% as the legal per se limit for impairment.

Step-by-Step Solution

1
Identify the driver classification and vehicle type in the prompt
The driver is an adult (aged 21 or older) operating a standard non-commercial passenger vehicle.
Statutory BAC limits vary depending on age (under 21 vs. 21+) and vehicle class (commercial vs. non-commercial).
2
Recall the statutory per se threshold for standard adult drivers
The standard per se legal impairment limit is 0.08% BAC.
At or above 0.08% BAC, an adult driver is legally presumed impaired regardless of observed driving behavior.

Key Concept

Blood Alcohol Concentration (BAC) statutory per se limits for adult non-commercial drivers
Estimated Time:45s
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Topics

Blood Alcohol Concentration (BAC) Limits and Thresholds

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