California Permit Test Coach
Alcohol and drugsQuestion 198 of 229

You drive a vehicle that needs a commercial driver's license. What BAC is illegal?

  1. 0.01% or higher
  2. 0.06% or higher
  3. 0.08% or higher
  4. 0.04% or higher
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Correct answer: 0.04% or higher

The limit for a commercial vehicle is 0.04%. It is the same limit as for a passenger for hire.

Source: California Driver's Handbook (DL 600, California DMV, 2025), Section 9. Alcohol and Drugs: BAC Limits, page 73

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Questions last reviewed: 18 October 2026