1. The per se DUI limit for drivers age 21 or older is a BAC of ____.
- 0.05%
- 0.08%
- 0.10%
Explanation: Idaho's per se DUI limit is 0.08% BAC for drivers 21 and older. A BAC of 0.20% or more triggers enhanced 'excessive' DUI penalties.
Idaho DMV is administered by the Idaho Transportation Department (ITD), headquartered in Boise. The official Idaho written knowledge exam has 40 questions, and drivers must answer 34 correctly (85%) to pass. Our practice tests match the exact format, topics, and difficulty of the real Idaho DMV test.
What makes the Idaho DMV test unique?
Idaho has one of the highest passing thresholds in the country at 85% — only 6 mistakes allowed out of 40.
Idaho's "Stop as Yield" law allows cyclists to treat stop signs as yield signs and red lights as stop signs — unique among US states.
With the 85% passing threshold, plan to score at least 90% on practice tests before attempting the real exam.
Browse all Idaho questions
284 indexed questions with full answers, explanations, and law citations.
What does this sign indicate?
US DMV standard (applies in all states)
What does this sign indicate?
US DMV standard (applies in all states)
What does this sign indicate?
US DMV standard (applies in all states)
What does a Wrong Way sign indicate?
US DMV standard (applies in all states)
What does a ONE WAY sign indicate?
US DMV standard (applies in all states)
What does this sign means?
US DMV standard (applies in all states)
What does a NO PASSING ZONE pennant sign indicate?
Alabama Driver Manual
What does a Speed Limit sign indicate?
US DMV standard (applies in all states)
What does this sign mean?
US DMV standard (applies in all states)
What does a railroad crossbuck sign indicate?
US DMV standard (applies in all states)
What does a DIVIDED HIGHWAY ENDS sign indicate?
Alabama Driver Manual
What does a PEDESTRIAN CROSSING sign indicate?
US DMV standard (applies in all states)
Children should ride in ____.
US DMV standard (applies in all states)
Drugs can affect driving ____.
Alabama Driver Manual
Which statement about drinking and driving is NOT correct?
Alabama Driver Manual
Texting while driving is dangerous because ____.
Alabama Driver Manual
The safest way to use a phone while driving is to ____.
Alabama Driver Manual
Which option is NOT a good way to reduce distraction?
US DMV standard (applies in all states)
What should you do if another driver behaves aggressively?
Alabama Driver Manual
Airbags are most effective when ____.
Alabama Driver Manual
What should you do if an oncoming vehicle's headlights are bright?
US DMV standard (applies in all states)
In fog you should generally use ____.
US DMV standard (applies in all states)
What should you do when roads are wet?
Alabama Driver Manual
What should you do if your vehicle starts to skid?
US DMV standard (applies in all states)
The posted speed limit is ____.
Alabama Driver Manual
What should you do if road or weather conditions are poor?
Alabama Driver Manual
What should you do when usually pass another vehicle?
Alabama Driver Manual
Which statement about passing is NOT correct?
Alabama Driver Manual
Which statement about work zones is NOT correct?
Alabama Driver Manual
Large trucks or motorcycles in front of you often require ____.
Alabama Driver Manual
Before returning to your lane after passing, you should make sure ____.
Alabama Driver Manual
Which statement about posted speed limits is NOT correct?
Alabama Driver Manual
What should you do when approaching a stopped emergency or service vehicle with flashing lights?
US DMV standard (applies in all states)
Which statement about roadside emergency scenes is NOT correct?
US DMV standard (applies in all states)
Before changing lanes or merging you should check ____.
US DMV standard (applies in all states)
Defensive driving means you should ____ and be ready for the mistakes of others.
Alabama Driver Manual
When two vehicles arrive at an uncontrolled intersection at about the same time, who should usually go first?
US DMV standard (applies in all states)
At a four-way stop, the vehicle that should go first is usually the one that ____.
US DMV standard (applies in all states)
What should you do if you see a blind pedestrian using a white cane or guide dog?
US DMV standard (applies in all states)
What should you do when an emergency vehicle approaches with siren or flashing lights?
US DMV standard (applies in all states)
What should you do when entering a roundabout?
US DMV standard (applies in all states)
If you approach a yield sign, you must ____.
Alabama Driver Manual
When a stopped school bus is using red warning signals and a stop arm, what is the correct response?
US DMV standard (applies in all states)
Which statement about a school bus stopped with red warning signals is NOT correct?
US DMV standard (applies in all states)
What should you do if warning lights are flashing at a railroad crossing?
Alabama Driver Manual
You should never ____ at a railroad crossing.
Alabama Driver Manual
Which statement about freeway merging is NOT correct?
Alabama Driver Manual
Which statement about roundabouts is NOT correct?
US DMV standard (applies in all states)
What should you do before making a left turn?
Alabama Driver Manual
A left turn on red may be allowed only ____.
Alabama Driver Manual
What should you do before backing your vehicle?
US DMV standard (applies in all states)
What should you do when parking on a hill?
US DMV standard (applies in all states)
Which option is NOT a safe step when parking on a hill?
Alabama Driver Manual
What should you do when not park?
Alabama Driver Manual
What should you do before getting out of a parked vehicle on the traffic side?
Alabama Driver Manual
What should you do if you must stop on the roadway because of an emergency?
Alabama Driver Manual
Before turning you should reduce speed to a ____ and watch for other road users.
Alabama Driver Manual
Backing is safest when you ____.
Alabama Driver Manual
What should you do when preparing for a turn?
Alabama Driver Manual
What does 'parallel parking' mean?
US DMV standard (applies in all states)
What should you do when following a motorcycle?
Alabama Driver Manual
Large trucks have ____.
US DMV standard (applies in all states)
Which statement about bicyclists is NOT correct?
Alabama Driver Manual
What should you do when approaching slow-moving farm equipment or other slow vehicles?
Alabama Driver Manual
What should you do when waiting behind another vehicle at railroad tracks?
US DMV standard (applies in all states)
What does 'sharing the road' mean for drivers?
US DMV standard (applies in all states)
What is a 'bike lane' and what does it mean for drivers?
US DMV standard (applies in all states)
What does 'vulnerable road user' mean?
US DMV standard (applies in all states)
What is the meaning of a 'no-zone' around large trucks?
US DMV standard (applies in all states)
What does it mean to 'share the road with motorcycles'?
US DMV standard (applies in all states)
Which of the following is true about sharing the road with cyclists?
US DMV standard (applies in all states)
Which of the following is true about pedestrian right-of-way?
US DMV standard (applies in all states)
Real-format questions with the reasoning behind every answer.
Explanation: Idaho's per se DUI limit is 0.08% BAC for drivers 21 and older. A BAC of 0.20% or more triggers enhanced 'excessive' DUI penalties.
Explanation: Law enforcement must be notified immediately of any crash causing injury, death, or more than $1,500 in property damage to any one person.
Explanation: Signals communicate your intent before turns, lane changes, and pulling out.
Answers to the questions Idaho test-takers ask most.
Driving laws vary by state — compare requirements.
40 questions · 85% to pass. Start practicing free.