It is illegal for a person 21 years of age or older to drive with a minimum blood alcohol concentration (BAC) of:
For drivers age 21 or older, it is illegal to operate a motor vehicle with a blood alcohol concentration (BAC) of 0.08 percent or higher. Driving while under the influence of alcohol is not only illegal, but dangerous.
See the exact questions that will be on the 2024 Colorado DMV exam.
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