Alcohol and drugsQuestion 206 of 229

A passenger in your car wants to smoke a cannabis product. What does the law say?

  1. It is illegal for the passenger to do this in a vehicle
  2. It is legal if the driver does not smoke
  3. It is legal if the windows are open
  4. It is legal on a freeway only
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Correct answer: It is illegal for the passenger to do this in a vehicle

The ban covers the driver and the passengers. No one may drink alcohol or smoke or eat cannabis in a vehicle.

Source: California Driver's Handbook (DL 600, California DMV, 2025), Section 9. Alcohol and Drugs: Use or Possession of Alcohol or Cannabis Products in a Vehicle, page 72

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Questions last reviewed: 18 October 2026