What are the laws about cannabis and driving?

3. Go to the police station for drug tests

At the police station, a certified drug recognition expert will do more tests. This includes physical co-ordination exercises similar to the Standardized Field Sobriety Tests. They may also check your:

  • blood pressure
  • oral body temperature
  • pulse
  • pupil size in different lighting conditions

The expert will look at the test results. If they find you're , they will identify the drug and you'll be charged with impaired driving. The expert can order you to give a blood, urine, or saliva sample to confirm that the drug is in your body.

It is a criminal to refuse to do a drug evaluation test. If you refuse, the police will you with . A court will decide whether you had a reasonable excuse for refusing. It's hard to show that you had a reasonable excuse. If the police ask for a drug evaluation tests, it's best to do the test.

You have the right to talk to a lawyer before doing drug evaluation tests at the police station. And you have the right to remain silent if the police ask you questions.

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