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Difficulty: EasyBlood Alcohol Concentration (BAC) Limits and Thresholds

While operating a commercial motor vehicle, a driver is tested for alcohol consumption. Under standard traffic laws, what is the maximum Blood Alcohol Concentration (BAC) allowed before the driver is legally considered impaired?

  1. 0.04%Answer
  2. B
    0.08%
  3. C
    0.01%
  4. D
    0.10%

Answer

0.04%
Under traffic safety laws, operating a commercial motor vehicle with a Blood Alcohol Concentration (BAC) of 0.04% or higher constitutes driving under the influence. This limit is half the standard 0.08% limit for non-commercial adult drivers.

Step-by-Step Solution

1
Identify the driver classification in the question
The driver is operating a commercial motor vehicle.
Commercial vehicle drivers are subject to stricter statutory regulations than standard non-commercial drivers.
2
Recall the legal BAC threshold for commercial drivers
The legal per se BAC limit for commercial vehicle operators is 0.04%.
Safety regulations mandate a lower alcohol threshold due to the size and weight of commercial vehicles.

Key Concept

Commercial Driver Legal BAC Limits
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Topics

Blood Alcohol Concentration (BAC) Limits and Thresholds

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