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Driving Under the Influence — Colorado Driver's License Practice Test

Driving Under the InfluenceQuestion 1 of 27

27 questions in this topic · 27 drawn at random this round

According to the National Safety Council, the active ingredients in marijuana cause changes in which two kinds of effects?

Colorado Driver Handbook

All questions are based on the official Colorado Driver Handbook (Colorado DMV, DR 2337). Study the relevant section to reinforce your knowledge.

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This Colorado Driver's License Driving Under the Influence practice set has 27 practice questions based on the official exam materials, each with an instant explanation. You need 80% on the real Colorado Driver's License knowledge test to pass.

Sample questions

Three questions from the Driving Under the Influence bank with the correct answer and an explanation. The practice quiz above draws 27 questions at random from the same bank.

  1. What is the law regarding open containers in the passenger area of a motor vehicle on a public road?

    • It is unlawful to possess an open container of alcohol or marijuana in the passenger area — Correct answer
    • Open containers are legal as long as the driver is not drinking
    • Only open alcohol containers are prohibited — marijuana containers are allowed
    • Open containers are allowed if kept in a cup holder

    Explanation: It is unlawful to possess an open container of alcohol or an open container of marijuana in the passenger area of a motor vehicle on a public road.

    Handbook: Driving Under the Influence — Open containers

  2. What is the difference between DWAI and DUI in Colorado?

    • DWAI means impaired to the slightest degree; DUI means substantially incapable of safe driving — Correct answer
    • DWAI applies only to drugs; DUI applies only to alcohol
    • They are two names for exactly the same offense
    • DWAI applies only to drivers under 21

    Explanation: DWAI (Driving While Ability Impaired) means the driver is impaired to the slightest degree; DUI (Driving Under the Influence) means the driver is substantially incapable of safe driving.

    Handbook: Driving Under the Influence — DWAI vs DUI

  3. At what BAC may a driver be convicted of DUI per se in Colorado?

    • A BAC greater than 0.08% — Correct answer
    • A BAC greater than 0.05%
    • A BAC greater than 0.10%
    • Any detectable amount of alcohol

    Explanation: A driver may be convicted of DUI per se if BAC is greater than 0.08%; impaired-driving convictions can also rest on driving behavior, observed impairment and field sobriety tests, not BAC alone.

    Handbook: Driving Under the Influence — DUI per se