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Difficulty: EasyBlood Alcohol Concentration (BAC) Limits and Thresholds

During a routine traffic stop, an adult driver aged 25 operating a personal passenger vehicle submits to a breathalyzer test. Under standard traffic safety laws, at what Blood Alcohol Concentration (BAC) level is this driver considered legally impaired per se?

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

Answer

0.08%
Under standard statutory traffic laws, non-commercial drivers aged 21 and older are considered legally impaired per se when their Blood Alcohol Concentration (BAC) reaches 0.08% or higher.

Step-by-Step Solution

1
Identify the driver's classification and vehicle type from the scenario.
The driver is an adult (age 25) operating a standard non-commercial passenger vehicle.
Statutory BAC limits depend on whether the driver is under 21, operating a commercial motor vehicle, or driving a standard personal vehicle.
2
Apply the statutory BAC limit for adult non-commercial drivers.
The per se legal limit for an adult driver operating a personal vehicle is 0.08%.
At or above 0.08% BAC, a driver is legally presumed impaired without needing further proof of diminished driving ability.

Key Concept

Standard Adult Driver BAC Limit (0.08%)
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Topics

Blood Alcohol Concentration (BAC) Limits and Thresholds

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