Idaho: Alcohol and drugs
How alcohol and drugs affect driving, Idaho’s BAC limits, test refusal, the open container law and DUI penalties. Split into 4 shorter tests so you're not stuck in one long quiz.
Independent educational site · not affiliated with any government agency or DMV
Choose a part
Alcohol and drugs — Part 1
Questions in this part include: “During the GDL supervised instruction period, which laws must you observe?”
StartAlcohol and drugs — Part 2
Questions in this part include: “At an alcohol concentration slightly above .05, what happens to the risk of causing a crash?”
StartAlcohol and drugs — Part 3
Questions in this part include: “Where must unsealed alcoholic beverages be carried when transported in a vehicle?”
StartAlcohol and drugs — Part 4
Questions in this part include: “What is the maximum jail sentence for a first driving under the influence conviction?”
StartAll 78 Alcohol and drugs questions with answers
Choose a part above to take a practice test, or study every question and answer here.
Show the questions and answersHide the questions
-
During the GDL supervised instruction period, which laws must you observe?
- Only the laws regarding alcohol
- Only the laws regarding alcohol while a passenger is present
- All laws regarding alcohol and other intoxicating substances
- No special laws, because an adult is supervising
Show answer
Correct answer: All laws regarding alcohol and other intoxicating substances
You must observe all laws regarding alcohol and other intoxicating substances.
Source: Idaho Driver's Handbook (July 2026), page 19 · Open this page in the manual (Manual page 19)
-
What is an administrative license suspension (ALS)?
- A suspension imposed only after a jury trial
- A suspension for a driver who skips a court date
- A suspension given for any moving violation
- An automatic suspension for failing an evidentiary test
Show answer
Correct answer: An automatic suspension for failing an evidentiary test
The manual describes the administrative license suspension as an automatic suspension for failure of an evidentiary test (breath, blood, or urine).
Source: Idaho Driver's Handbook (July 2026), page 124 · Open this page in the manual (Manual page 124)
-
What happens when a driver is arrested for DUI and fails an evidentiary test by having an alcohol concentration over the legal limit?
- The driver keeps full privileges until the court date
- A peace officer serves the driver immediately with a Notice of Suspension
- The officer mails a warning letter within a year
- The driver must wait for a hearing before any notice is given
Show answer
Correct answer: A peace officer serves the driver immediately with a Notice of Suspension
A peace officer serves a Notice of Suspension immediately to a driver who fails an evidentiary test over the legal limit.
Source: Idaho Driver's Handbook (July 2026), page 125 · Open this page in the manual (Manual page 125)
-
Within how many days of the date on the notice of suspension may you request an administrative hearing on an ALS?
- Seven days
- Three days
- Thirty days
- Ninety days
Show answer
Correct answer: Seven days
You have the right to request an administrative hearing within seven days of the date on the notice of suspension.
Source: Idaho Driver's Handbook (July 2026), page 125 · Open this page in the manual (Manual page 125)
-
How does an ALS relate to the criminal DUI charges brought against a driver?
- The ALS replaces the criminal charges, so no court appearance is needed
- The ALS applies only if the criminal charges are dropped
- It is a civil penalty, and the driver must still appear in court
- The ALS is a criminal penalty imposed by the court
Show answer
Correct answer: It is a civil penalty, and the driver must still appear in court
The ALS is a civil penalty separate from criminal penalties, and the driver must still appear in court for the DUI charges.
Source: Idaho Driver's Handbook (July 2026), page 126 · Open this page in the manual (Manual page 126)
-
When does a notice of suspension for an ALS become effective?
- Immediately when it is served
- Thirty days after the date of service
- Seven days after the date of service
- Ninety days after the date of service
Show answer
Correct answer: Thirty days after the date of service
The notice becomes effective thirty days after the date of service, the date you received it.
Source: Idaho Driver's Handbook (July 2026), page 126 · Open this page in the manual (Manual page 126)
-
For a first failure of an evidentiary test, how long is the ALS suspension of driving privileges?
- Thirty days
- Six months
- One year
- Ninety days
Show answer
Correct answer: Ninety days
For a first failure, driving privileges are suspended for ninety days.
Source: Idaho Driver's Handbook (July 2026), page 126 · Open this page in the manual (Manual page 126)
-
During which part of a first-failure ALS suspension do you have absolutely no driving privileges?
- The last 30 days
- The first 7 days
- The entire 90 days only if you request a hearing
- The first 30 days
Show answer
Correct answer: The first 30 days
You will have absolutely no driving privileges during the first thirty days of the ninety-day suspension.
Source: Idaho Driver's Handbook (July 2026), page 126 · Open this page in the manual (Manual page 126)
-
After a first-failure ALS, how long must an ignition interlock device be installed on any vehicle you drive?
- Six months after the end of the suspension period
- One year after the end of the suspension period
- Two years after the end of the suspension period
- Only during the 90-day suspension period
Show answer
Correct answer: One year after the end of the suspension period
You must have an ignition interlock device on any vehicle you drive for one year after the end of your suspension period.
Source: Idaho Driver's Handbook (July 2026), page 126 · Open this page in the manual (Manual page 126)
-
What is the penalty for a second failure of an evidentiary test within five years?
- A 90-day suspension with driving privileges for work
- A six-month suspension with a restricted permit
- One year suspended, with no driving privileges of any kind
- A two-year suspension with a restricted permit
Show answer
Correct answer: One year suspended, with no driving privileges of any kind
A second failure within five years brings a one-year suspension with absolutely no driving privileges of any kind.
Source: Idaho Driver's Handbook (July 2026), page 126 · Open this page in the manual (Manual page 126)
-
Under Idaho's implied consent law, what has a person who drives or is in physical control of a motor vehicle done?
- Consented to a BAC or drug test if suspected of DUI
- Agreed to pay for any damages in a crash
- Agreed to let police search the vehicle at any time
- Given consent to be tested only after a crash
Show answer
Correct answer: Consented to a BAC or drug test if suspected of DUI
Anyone who drives or is in physical control of a motor vehicle has given consent to a BAC or drug test if suspected of driving under the influence.
Source: Idaho Driver's Handbook (July 2026), page 126 · Open this page in the manual (Manual page 126)
-
What is the civil penalty for refusing to take a test when requested by a law enforcement officer?
- $25.00, plus a warning letter
- $250.00 and a license suspension
- $100.00, with no suspension
- $500.00, with no suspension
Show answer
Correct answer: $250.00 and a license suspension
A person who refuses is subject to a license suspension and a civil penalty of $250.00.
Source: Idaho Driver's Handbook (July 2026), page 126 · Open this page in the manual (Manual page 126)
-
What is the penalty for a first refusal to take a test, if the court upholds the officer's findings?
- A 90-day suspension with a restricted permit
- A 30-day suspension with no driving privileges
- A two-year suspension with a restricted permit
- A one-year suspension with no driving privileges
Show answer
Correct answer: A one-year suspension with no driving privileges
If the court upholds the officer's findings, a first refusal means one year suspended with absolutely no driving privileges of any kind.
Source: Idaho Driver's Handbook (July 2026), page 126 · Open this page in the manual (Manual page 126)
-
What is the penalty for a second refusal to take a test within 10 years?
- A two-year absolute suspension
- A one-year absolute suspension
- A 90-day suspension
- A five-year absolute suspension
Show answer
Correct answer: A two-year absolute suspension
A second refusal within 10 years results in a two-year absolute suspension.
Source: Idaho Driver's Handbook (July 2026), page 127 · Open this page in the manual (Manual page 127)
-
How does the penalty for refusing a test relate to penalties for a DUI conviction?
- It replaces any court penalty for the DUI
- It applies only if you are not convicted of DUI
- It is in addition to any penalty from a DUI conviction
- It is reduced by any court penalty for the DUI
Show answer
Correct answer: It is in addition to any penalty from a DUI conviction
The refusal penalty is in addition to any penalty received in court for a DUI conviction.
Source: Idaho Driver's Handbook (July 2026), page 127 · Open this page in the manual (Manual page 127)
-
When does the mandatory ignition interlock device requirement begin for an administrative license suspension?
- As soon as the notice is served
- After your suspension ends
- After the first 30 days of the suspension
- After your hearing is held
Show answer
Correct answer: After your suspension ends
The ignition interlock device is mandatory on all administrative license suspensions, beginning after your suspension ends.
Source: Idaho Driver's Handbook (July 2026), page 127 · Open this page in the manual (Manual page 127)
-
After a DUI conviction, which vehicles must have an ignition interlock device installed, unless the court orders otherwise?
- Any vehicle that you drive
- Only the vehicle you were driving when arrested
- Only vehicles registered in your name
- Only commercial vehicles
Show answer
Correct answer: Any vehicle that you drive
A driver convicted of DUI must have an ignition interlock device installed in any vehicle driven, unless the court orders otherwise.
Source: Idaho Driver's Handbook (July 2026), page 127 · Open this page in the manual (Manual page 127)
-
What does an ignition interlock device require the driver to do in order to start the vehicle?
- Enter a numeric code
- Show a license to a camera
- Provide a breath sample
- Take a blood test
Show answer
Correct answer: Provide a breath sample
The device requires the driver to provide a breath sample in order to start the vehicle.
Source: Idaho Driver's Handbook (July 2026), page 127 · Open this page in the manual (Manual page 127)
-
What happens if the breath sample given to an ignition interlock device shows alcohol at or above a preset level?
- The vehicle starts but the horn sounds
- The vehicle will not start
- The vehicle starts at reduced speed
- The vehicle starts and the police are called
Show answer
Correct answer: The vehicle will not start
If the sample indicates an alcohol content at or above a preset level, the vehicle will not start.
Source: Idaho Driver's Handbook (July 2026), page 127 · Open this page in the manual (Manual page 127)
-
According to the handbook, your ability to drive after you have had a few drinks may be impaired:
- long before you or anyone else notices outward signs
- only once you or a passenger notices outward signs
- only when you feel dizzy or sleepy behind the wheel
- only after a trained officer points out the signs
Show answer
Correct answer: long before you or anyone else notices outward signs
The handbook warns that your ability to drive may be impaired long before you or anyone else notices outward signs, so you cannot trust yourself or your friends to judge it.
Source: Idaho Driver's Handbook (July 2026), page 128 · Open this page in the manual (Manual page 128)
-
At an alcohol concentration slightly above .05, what happens to the risk of causing a crash?
- It stays the same
- It increases by half
- It doubles
- It triples
Show answer
Correct answer: It doubles
The handbook states that at slightly above .05 the risk of causing a crash doubles.
Source: Idaho Driver's Handbook (July 2026), page 128 · Open this page in the manual (Manual page 128)
-
At an alcohol concentration of .10, the risk of causing a crash is:
- four times as great
- six times as great
- ten times as great
- twelve times as great
Show answer
Correct answer: six times as great
At .10 the handbook says the risk is six times as great.
Source: Idaho Driver's Handbook (July 2026), page 128 · Open this page in the manual (Manual page 128)
-
At an alcohol concentration of .15, the risk of causing a crash is:
- 10 times as great
- 15 times as great
- 50 times as great
- 25 times as great
Show answer
Correct answer: 25 times as great
The handbook says the risk at .15 is 25 times as great.
Source: Idaho Driver's Handbook (July 2026), page 128 · Open this page in the manual (Manual page 128)
-
How does the amount of alcohol in 12 ounces of beer compare with that in a jigger of 80-proof hard liquor and five ounces of table wine?
- They all contain approximately the same amount
- Beer contains about half as much as the others
- Hard liquor contains about twice as much as beer
- Table wine contains the most of the three
Show answer
Correct answer: They all contain approximately the same amount
A jigger of 80-proof liquor, five ounces of table wine, and 12 ounces of beer all contain approximately the same amount of alcohol, about an ounce each.
Source: Idaho Driver's Handbook (July 2026), page 129 · Open this page in the manual (Manual page 129)
-
How many ounces of 80-proof hard liquor make up one jigger?
- 0.5 ounce
- 2 ounces
- 1.5 ounces
- 3 ounces
Show answer
Correct answer: 1.5 ounces
The handbook defines a jigger as 1.5 ounces of 80-proof hard liquor.
Source: Idaho Driver's Handbook (July 2026), page 129 · Open this page in the manual (Manual page 129)
-
Studies have found that the greatest percentage of people arrested for driving under the influence had been drinking what?
- Hard liquor
- Beer
- Wine
- Mixed drinks
Show answer
Correct answer: Beer
The handbook reports that studies found the greatest percentage of people arrested for driving under the influence had been drinking beer.
Source: Idaho Driver's Handbook (July 2026), page 129 · Open this page in the manual (Manual page 129)
-
How does alcohol get into your bloodstream?
- Only after the liver and kidneys have filtered it
- Through the lungs and then straight to the heart
- Through the kidneys, then on to the stomach
- Directly through the stomach and small intestine
Show answer
Correct answer: Directly through the stomach and small intestine
The handbook says alcohol passes directly through your stomach and small intestine into the bloodstream.
Source: Idaho Driver's Handbook (July 2026), page 129 · Open this page in the manual (Manual page 129)
-
On an empty stomach, how fast does alcohol pass into the bloodstream?
- Almost immediately
- After about an hour
- Only after two drinks
- Somewhat longer than usual
Show answer
Correct answer: Almost immediately
On an empty stomach the process takes place almost immediately; on a full stomach it takes somewhat longer.
Source: Idaho Driver's Handbook (July 2026), page 129 · Open this page in the manual (Manual page 129)
-
When alcohol reaches your brain, what does it promote?
- Alertness
- Quick reactions
- Relaxation
- Better balance
Show answer
Correct answer: Relaxation
The handbook states that when alcohol reaches your brain, it promotes relaxation.
Source: Idaho Driver's Handbook (July 2026), page 129 · Open this page in the manual (Manual page 129)
-
After how many drinks does alcohol begin to impair your reaction time, coordination, and balance?
- One drink
- Two to four drinks
- Five to seven drinks
- Eight or more drinks
Show answer
Correct answer: Two to four drinks
The handbook says that after two to four drinks alcohol begins to impair reaction time, coordination, and balance.
Source: Idaho Driver's Handbook (July 2026), page 129 · Open this page in the manual (Manual page 129)
-
After two to four drinks, which of these also suffers, making it harder to react to dangers ahead?
- Your hearing and your sense of smell
- Your knowledge of Idaho traffic laws
- Your ability to remember routes
- Your vision and ability to judge distance
Show answer
Correct answer: Your vision and ability to judge distance
The handbook says vision and the ability to judge distance suffer too, making it harder to react to dangers ahead.
Source: Idaho Driver's Handbook (July 2026), page 129 · Open this page in the manual (Manual page 129)
-
Once alcohol is in your bloodstream, what will return you to normal?
- Only time
- Black coffee
- Exercise
- Eating a meal
Show answer
Correct answer: Only time
Neither aspirin, black coffee, deep breathing, exercise, nor eating will sober you up; only time will return you to normal.
Source: Idaho Driver's Handbook (July 2026), page 129 · Open this page in the manual (Manual page 129)
-
Studies show that a combination of alcohol and anger is responsible for much of what kind of driving?
- Drowsy, fatigued driving
- Hesitant, uncertain driving
- Reckless, aggressive driving
- Distracted, careless driving
Show answer
Correct answer: Reckless, aggressive driving
The handbook says alcohol combined with anger is responsible for much of the reckless, aggressive driving that often causes fatal highway crashes.
Source: Idaho Driver's Handbook (July 2026), page 129 · Open this page in the manual (Manual page 129)
-
By making you feel good, alcohol may give you what?
- Better judgment
- False confidence
- Sharper vision
- Faster reactions
Show answer
Correct answer: False confidence
The handbook says that by making you feel good, alcohol may also give you false confidence.
Source: Idaho Driver's Handbook (July 2026), page 129 · Open this page in the manual (Manual page 129)
-
What do drinking drivers often think about driving at high speeds?
- That it will help them sober up
- That police cannot detect it
- That it is needed to keep up with traffic
- That they can drive safely at high speeds
Show answer
Correct answer: That they can drive safely at high speeds
Speeding is listed as a sign of drunken driving because drinking drivers often think they can drive safely at high speeds.
Source: Idaho Driver's Handbook (July 2026), page 130 · Open this page in the manual (Manual page 130)
-
Even if a drinking driver stays in the lane, what trouble may the driver have?
- Steering straight
- Starting the engine
- Reading the speedometer
- Reaching the pedals
Show answer
Correct answer: Steering straight
Weaving is a sign of drunken driving: drivers may stay in their lane but have trouble steering straight.
Source: Idaho Driver's Handbook (July 2026), page 130 · Open this page in the manual (Manual page 130)
-
Why might a drinking driver drive slower than normal traffic?
- The driver is trying to sober up
- The driver cannot read the speedometer
- The driver may be overly cautious
- The driver always obeys the posted limit
Show answer
Correct answer: The driver may be overly cautious
Slow driving is listed as a sign of drunken driving because drinking drivers may be overly cautious and drive slower than normal traffic.
Source: Idaho Driver's Handbook (July 2026), page 130 · Open this page in the manual (Manual page 130)
-
A driver steers or accelerates in a jerky way. What does the handbook say this may reveal in a drinking driver?
- A mechanical steering problem
- Short mental lapses
- A wish to pass other traffic
- Poor road conditions ahead
Show answer
Correct answer: Short mental lapses
Drinking drivers often have short mental lapses revealed by jerky steering or acceleration.
Source: Idaho Driver's Handbook (July 2026), page 130 · Open this page in the manual (Manual page 130)
-
How may a drinking driver stop at traffic signs or lights?
- Very gradually, well ahead of them
- Only after checking the mirrors twice
- By rolling through at a low speed
- Suddenly, rather than easing up to them
Show answer
Correct answer: Suddenly, rather than easing up to them
Quick stops are a sign of drunken driving: drivers may make sudden stops at traffic signs or lights rather than easing up to them.
Source: Idaho Driver's Handbook (July 2026), page 130 · Open this page in the manual (Manual page 130)
-
Idaho's open container law prohibits who from drinking or possessing an open container of alcohol in a vehicle?
- Both drivers and passengers
- Drivers only
- Passengers only
- Only drivers who are under 21
Show answer
Correct answer: Both drivers and passengers
The open container law prohibits both drivers and passengers from drinking or possessing an open beverage container of alcohol.
Source: Idaho Driver's Handbook (July 2026), page 130 · Open this page in the manual (Manual page 130)
-
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
Show answer
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)
-
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
Show answer
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)
-
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
Show answer
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)
-
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
Show answer
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)
-
Driving while under the influence of legal or illegal substances is called what?
- Reckless driving
- Aggressive driving
- Drugged driving
- Distracted driving
Show answer
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)
-
Where is drugged driving illegal?
- Only in Idaho
- In every state
- Only when the drug is illegal
- Only on interstate highways
Show answer
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)
-
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
Show answer
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)
-
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
Show answer
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)
-
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
Show answer
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)
-
Sedatives such as benzodiazepines and barbiturates cause what?
- Faster reactions and focus
- Dizziness and drowsiness
- Better balance and coordination
- Sharper vision
Show answer
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)
-
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
Show answer
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)
-
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)
-
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
Show answer
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)
-
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)
-
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
Show answer
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)
-
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)
-
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)
-
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)
-
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
Show answer
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)
-
What is the maximum jail sentence for a first driving under the influence conviction?
- Six months
- 30 days
- Three months
- One year
Show answer
Correct answer: Six months
A first conviction carries up to six months in jail.
Source: Idaho Driver's Handbook (July 2026), page 132 · Open this page in the manual (Manual page 132)
-
What is the maximum fine for a first driving under the influence conviction?
- $500
- $750
- $1,000
- $1,500
Show answer
Correct answer: $1,000
A first conviction carries a fine of up to $1,000.
Source: Idaho Driver's Handbook (July 2026), page 132 · Open this page in the manual (Manual page 132)
-
For a first driving under the influence conviction (age 21 or older), the mandatory license suspension is:
- at least 30 days and up to 60 days
- at least 90 days and up to 180 days
- at least 6 months and up to 18 months
- at least 2 years and up to 3 years
Show answer
Correct answer: at least 90 days and up to 180 days
A first conviction brings a mandatory suspension of at least 90 days and up to 180 days (one year if under 21).
Source: Idaho Driver's Handbook (July 2026), page 132 · Open this page in the manual (Manual page 132)
-
For a first driving under the influence conviction, how long is the mandatory license suspension if you are under 21?
- 30 days
- Three years
- Five years
- One year
Show answer
Correct answer: One year
The suspension for a first conviction is one year if you are under 21.
Source: Idaho Driver's Handbook (July 2026), page 132 · Open this page in the manual (Manual page 132)
-
After a first driving under the influence conviction, for how many days are there absolutely no driving privileges?
- The first 30 days
- The first 10 days
- The first 60 days
- The first 90 days
Show answer
Correct answer: The first 30 days
The suspension comes with absolutely no driving privileges for the first 30 days.
Source: Idaho Driver's Handbook (July 2026), page 132 · Open this page in the manual (Manual page 132)
-
What will likely be required after the suspension for a driving under the influence conviction?
- A mandatory driver safety course
- A yearly vehicle safety inspection
- An ignition interlock restriction
- Installation of a speed limiter
Show answer
Correct answer: An ignition interlock restriction
The handbook says an ignition interlock restriction will likely be required after the suspension.
Source: Idaho Driver's Handbook (July 2026), page 132 · Open this page in the manual (Manual page 132)
-
For a second driving under the influence conviction within 10 years, the mandatory jail sentence for a driver 21 or older is:
- 5 days to 90 days
- 10 days to one year
- 3 days to six months
- 10 days to five years
Show answer
Correct answer: 10 days to one year
A second conviction within 10 years carries a mandatory jail sentence from 10 days to one year.
Source: Idaho Driver's Handbook (July 2026), page 132 · Open this page in the manual (Manual page 132)
-
If you are under 21, a second driving under the influence conviction within 10 years carries a mandatory jail sentence of how long?
- 5 days
- 60 days
- 90 days
- 30 days
Show answer
Correct answer: 30 days
The handbook gives 30 days for those under 21, in place of 10 days to one year.
Source: Idaho Driver's Handbook (July 2026), page 132 · Open this page in the manual (Manual page 132)
-
What is the maximum fine for a second driving under the influence conviction within 10 years?
- $2,000
- $1,500
- $3,000
- $4,000
Show answer
Correct answer: $2,000
A second conviction carries up to a $2,000 fine.
Source: Idaho Driver's Handbook (July 2026), page 132 · Open this page in the manual (Manual page 132)
-
For a second driving under the influence conviction within 10 years (age 21 or older), the mandatory license suspension is:
- 90 days
- Six months
- One year
- Five years
Show answer
Correct answer: One year
A second conviction within 10 years brings a mandatory suspension of one year (two years if under 21).
Source: Idaho Driver's Handbook (July 2026), page 132 · Open this page in the manual (Manual page 132)
-
If you are under 21, how long is the mandatory license suspension for a second driving under the influence conviction within 10 years?
- 90 days
- Two years
- Three years
- Five years
Show answer
Correct answer: Two years
For those under 21, a second conviction brings a two-year suspension.
Source: Idaho Driver's Handbook (July 2026), page 132 · Open this page in the manual (Manual page 132)
-
For three or more driving under the influence convictions within 10 years, the mandatory jail sentence for a driver 21 or older is:
- 10 days to one year
- 60 days to five years
- 90 days to two years
- 30 days to ten years
Show answer
Correct answer: 30 days to ten years
Three or more convictions within 10 years carry a mandatory jail sentence from 30 days to ten years.
Source: Idaho Driver's Handbook (July 2026), page 132 · Open this page in the manual (Manual page 132)
-
If you are under 21 with three or more driving under the influence convictions within 10 years, what is the mandatory jail sentence?
- 10 days to six months
- 30 days to ten years
- 30 days to one year
- 90 days to two years
Show answer
Correct answer: 10 days to six months
For those under 21, the mandatory jail sentence is 10 days to six months.
Source: Idaho Driver's Handbook (July 2026), page 132 · Open this page in the manual (Manual page 132)
-
What is the maximum fine for three or more driving under the influence convictions within 10 years (age 21 or older)?
- $2,500
- $3,000
- $5,000
- $10,000
Show answer
Correct answer: $5,000
The fine is up to $5,000 (up to $2,000 if under 21).
Source: Idaho Driver's Handbook (July 2026), page 132 · Open this page in the manual (Manual page 132)
-
What is the maximum fine for three or more driving under the influence convictions within 10 years if you are under 21?
- $1,000
- $2,000
- $3,000
- $5,000
Show answer
Correct answer: $2,000
Under 21, the fine for three or more convictions is up to $2,000.
Source: Idaho Driver's Handbook (July 2026), page 132 · Open this page in the manual (Manual page 132)
-
For three or more driving under the influence convictions within 10 years (age 21 or older), the mandatory license suspension is:
- 90 days to one year
- six months to two years
- two to ten years
- one to five years
Show answer
Correct answer: one to five years
Three or more convictions bring a mandatory license suspension from one to five years.
Source: Idaho Driver's Handbook (July 2026), page 132 · Open this page in the manual (Manual page 132)
-
If you are under 21, how long is the mandatory suspension after three or more driving under the influence convictions within 10 years?
- 1 year or up to age 21, whichever is greater
- 90 days or up to age 21, whichever is less
- 2 years or up to age 25, whichever is greater
- 30 days or until the next birthday
Show answer
Correct answer: 1 year or up to age 21, whichever is greater
For those under 21, the suspension is 1 year or up to age 21, whichever is greater.
Source: Idaho Driver's Handbook (July 2026), page 132 · Open this page in the manual (Manual page 132)
-
What kind of offense is a conviction for three or more driving under the influence offenses within 10 years?
- A misdemeanor
- A civil infraction
- A felony
- A traffic warning
Show answer
Correct answer: A felony
The handbook states that a conviction for three or more offenses within 10 years is a felony.
Source: Idaho Driver's Handbook (July 2026), page 132 · Open this page in the manual (Manual page 132)
-
What is the most severe penalty CDL drivers may face for driving under the influence?
- A fine of $10,000
- Lifetime loss of CDL privileges
- Five years in prison
- A one-year suspension of all licenses
Show answer
Correct answer: Lifetime loss of CDL privileges
There are enhanced penalties for CDL drivers, up to the lifetime loss of CDL privileges.
Source: Idaho Driver's Handbook (July 2026), page 132 · Open this page in the manual (Manual page 132)