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Difficulty: MediumBlood Alcohol Concentration (BAC) Limits and Thresholds

While driving a personal passenger automobile, a 23-year-old motorist is requested to submit to a chemical breath test during a lawful traffic stop. According to standard traffic safety statutes, which Blood Alcohol Concentration (BAC) reading represents the statutory threshold at or above which an adult non-commercial driver is legally considered impaired?

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

Answer

The statutory threshold at or above which an adult non-commercial driver aged 21 or older is legally considered impaired is a Blood Alcohol Concentration (BAC) of 0.08%0.08\%.
Under standard state driver licensing statutes, an adult motorist aged 21 or older operating a private non-commercial vehicle is legally presumed impaired when their Blood Alcohol Concentration (BAC) is 0.08%0.08\% or higher.

Step-by-Step Solution

1
Identify the driver classification and vehicle type from the scenario.
The driver is an adult aged 23 operating a non-commercial personal passenger motor vehicle.
Statutory BAC limits vary depending on driver age and vehicle classification (e.g., underage zero tolerance, commercial drivers, or adult non-commercial drivers).
2
Apply the statutory BAC threshold applicable to adult non-commercial drivers.
The statutory limit for adult non-commercial drivers aged 21 and older is 0.08%0.08\%.
Standard motor vehicle codes designate a BAC of 0.08%0.08\% or higher as driving under the influence (DUI) for adult non-commercial operators.

Key Concept

Statutory Blood Alcohol Concentration (BAC) legal limits for adult non-commercial drivers
Estimated Time:1m 0s
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Topics

Blood Alcohol Concentration (BAC) Limits and Thresholds

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