Idaho: Alcohol and drugs — Part 3 Practice Test
Questions in this part include: “Where must unsealed alcoholic beverages be carried when transported in a vehicle?” · “What do opioids cause?”
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Questions are original and based on the official manual "Idaho Driver's Handbook" (July 2026), Idaho Transportation Department.
All 19 questions in this practice test
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Where must unsealed alcoholic beverages be carried when transported in a vehicle?
- In the glove box, or under the driver's seat if it is locked
- Within a passenger's reach but away from the driver
- In the trunk, or behind the last upright seat if there is no trunk
- On the back seat with a seat belt around the container
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Correct answer: In the trunk, or behind the last upright seat if there is no trunk
The container must be in the trunk or behind the last upright seat if there is no trunk.
Source: Idaho Driver's Handbook (July 2026), page 130 · Open this page in the manual (Manual page 130)
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What may happen if you drink alcohol while taking certain drugs or medications?
- The effects of the alcohol wear off faster
- You may feel and be more impaired
- The drug stops working completely
- Nothing changes if the drug is legal
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Correct answer: You may feel and be more impaired
Mixing alcohol with certain drugs or medications may make you feel and be more impaired, affecting driving-related tasks.
Source: Idaho Driver's Handbook (July 2026), page 130 · Open this page in the manual (Manual page 130)
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Your doctor writes a prescription that may make you drowsy or otherwise affect your driving. What should you do?
- Drive only during daylight hours and in good weather
- Take the drug only with a full meal and plenty of water
- Drive only short distances
- Let someone else drive while you are taking the drug
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Correct answer: Let someone else drive while you are taking the drug
The handbook says to ask the doctor whether a prescription will affect driving, and if so, let someone else drive while you take the drug.
Source: Idaho Driver's Handbook (July 2026), page 130 · Open this page in the manual (Manual page 130)
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An over-the-counter drug's label discourages driving. What should you do?
- Don't get behind the wheel
- Take a smaller dose and drive slowly
- Drive only on roads you know well
- Take the drug with a cup of coffee
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Correct answer: Don't get behind the wheel
The handbook says to read the label of over-the-counter drugs and, if driving is discouraged, not to get behind the wheel.
Source: Idaho Driver's Handbook (July 2026), page 130 · Open this page in the manual (Manual page 130)
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Driving while under the influence of legal or illegal substances is called what?
- Reckless driving
- Aggressive driving
- Drugged driving
- Distracted driving
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Correct answer: Drugged driving
The handbook defines driving under the influence of legal or illegal substances as drugged driving.
Source: Idaho Driver's Handbook (July 2026), page 131 · Open this page in the manual (Manual page 131)
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Where is drugged driving illegal?
- Only in Idaho
- In every state
- Only when the drug is illegal
- Only on interstate highways
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Correct answer: In every state
The handbook states that drugged driving is illegal in every state.
Source: Idaho Driver's Handbook (July 2026), page 131 · Open this page in the manual (Manual page 131)
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What effect does marijuana have on a driver?
- Speeds up reaction time but weakens your night vision
- Improves judgment of distance but dulls your hearing
- Sharpens focus while slowing your ability to steer
- Slows reaction time and impairs judgment of time and distance
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Correct answer: Slows reaction time and impairs judgment of time and distance
The handbook says marijuana slows reaction time and impairs judgment of time and distance.
Source: Idaho Driver's Handbook (July 2026), page 131 · Open this page in the manual (Manual page 131)
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Methamphetamine or cocaine causes what kind of behavior?
- Aggressive and reckless behaviors
- Calm and cautious behavior
- Slow and careful driving habits
- Better memory and thinking skills
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Correct answer: Aggressive and reckless behaviors
According to the handbook, methamphetamine or cocaine causes aggressive and reckless behaviors.
Source: Idaho Driver's Handbook (July 2026), page 131 · Open this page in the manual (Manual page 131)
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What do opioids cause?
- Faster reactions and sharper alertness at night
- Higher energy and improved judgment of distance
- Drowsiness and impaired memory and thinking skills
- Improved memory but slower steering reactions
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Correct answer: Drowsiness and impaired memory and thinking skills
The handbook says opioids cause drowsiness and impaired memory and thinking skills.
Source: Idaho Driver's Handbook (July 2026), page 131 · Open this page in the manual (Manual page 131)
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Sedatives such as benzodiazepines and barbiturates cause what?
- Faster reactions and focus
- Dizziness and drowsiness
- Better balance and coordination
- Sharper vision
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Correct answer: Dizziness and drowsiness
The handbook says sedatives (benzodiazepines, barbiturates, etc.) cause dizziness and drowsiness.
Source: Idaho Driver's Handbook (July 2026), page 131 · Open this page in the manual (Manual page 131)
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Which is a strategy the handbook gives to prevent impaired driving?
- Drink black coffee before driving home
- Wait one hour, then drive home slowly
- Drive home using only back roads
- Have a designated driver take all car keys
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Correct answer: Have a designated driver take all car keys
One listed strategy is to have a designated driver take all car keys.
Source: Idaho Driver's Handbook (July 2026), page 131 · Open this page in the manual (Manual page 131)
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How should you travel to and from parties where there are drugs and alcohol?
- Get a ride
- Drive yourself and leave early
- Drive with a friend who has fewer drinks
- Drive yourself but take back roads
Show answer
Correct answer: Get a ride
The handbook's strategy is to get a ride to and from parties where there are drugs and alcohol.
Source: Idaho Driver's Handbook (July 2026), page 131 · Open this page in the manual (Manual page 131)
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Which action is listed as a way to prevent impaired driving among your friends?
- Offer them a drink to relax
- Let them drive if they feel fine
- Offer to be a designated driver
- Follow them home in your own car
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Correct answer: Offer to be a designated driver
Offering to be a designated driver is one of the strategies to prevent impaired driving.
Source: Idaho Driver's Handbook (July 2026), page 131 · Open this page in the manual (Manual page 131)
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Which is one of the strategies to prevent drugged driving?
- Suggest that friends drive faster to get home sooner
- Talk with friends about the risks of drugged driving
- Tell friends that legal drugs are always safe to mix
- Let friends decide for themselves whether to drive
Show answer
Correct answer: Talk with friends about the risks of drugged driving
The handbook lists talking with friends about the risks of drugged driving as a strategy.
Source: Idaho Driver's Handbook (July 2026), page 131 · Open this page in the manual (Manual page 131)
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Under Idaho law, at what blood-alcohol concentration (BAC) are you considered to be driving under the influence if you are under 21?
- BAC of .01 or more
- BAC of .05 or more
- BAC of .10 or more
- BAC of .02 or more
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Correct answer: BAC of .02 or more
Idaho law considers a driver under 21 to be driving under the influence at a BAC of .02 or more.
Source: Idaho Driver's Handbook (July 2026), page 131 · Open this page in the manual (Manual page 131)
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Under Idaho law, at what BAC are you considered to be driving under the influence if you are operating a commercial vehicle?
- BAC of .04 or more
- BAC of .03 or more
- BAC of .06 or more
- BAC of .10 or more
Show answer
Correct answer: BAC of .04 or more
Idaho law sets .04 or more as driving under the influence when operating a commercial vehicle.
Source: Idaho Driver's Handbook (July 2026), page 131 · Open this page in the manual (Manual page 131)
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Under Idaho law, at what BAC are you considered to be driving under the influence if you are 21 or older?
- BAC of .05 or more
- BAC of .10 or more
- BAC of .08 or more
- BAC of .15 or more
Show answer
Correct answer: BAC of .08 or more
The handbook says a driver 21 or older is under the influence at a BAC of .08 or more.
Source: Idaho Driver's Handbook (July 2026), page 131 · Open this page in the manual (Manual page 131)
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What does an alcohol concentration of .20 or more carry?
- Only a written warning for a first offense
- Even stiffer penalties
- No change in penalties from lower levels
- Automatic loss of all licenses for life
Show answer
Correct answer: Even stiffer penalties
The handbook says an alcohol concentration of .20 or more carries even stiffer penalties.
Source: Idaho Driver's Handbook (July 2026), page 131 · Open this page in the manual (Manual page 131)
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A driver's BAC is less than .08. According to the handbook, what is true?
- The driver cannot be convicted of any driving under the influence offense at all
- The driver is legally considered sober and cannot be charged with any offense
- The driver may be convicted only if a passenger testifies that drinking occurred
- The driver may still be convicted of driving under the influence of other substances
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Correct answer: The driver may still be convicted of driving under the influence of other substances
Even if your BAC is less than .08, you may be convicted of driving under the influence of other intoxicating substances.
Source: Idaho Driver's Handbook (July 2026), page 131 · Open this page in the manual (Manual page 131)