Idaho · County sheriff’s driver’s license offices
Idaho’s knowledge test has 40 questions, and you need 34 right, or 85%, to pass.
40
questions
34
right to pass
85%
passing score
Checked against the Idaho Driver’s Handbook (July 2026 edition) on October 25, 2026. How we check facts
Practice test
Pick an answer and check it. Every question comes with the reason behind the right answer and the sentence of an official document it rests on.
To pass here you need 9 of 10, since Idaho’s test asks for 85%.
Question 1 of 10 · Traffic signals and arrows
The answer is C: No. Wait for a green arrow or light.
A red arrow means no turn in the direction it points. It is not a stop sign, and stopping does not earn you the turn. Wait until a green arrow or a green light comes on. The only exception is a sign at the corner that allows the turn after a stop. An empty road changes nothing.
“Vehicular traffic facing a steady RED ARROW signal indication shall not enter the intersection to make the movement indicated by the arrow”
Question 2 of 10 · Lane use and changing lanes
The answer is C: Your lane is ending. Merge left.
A slanted arrow painted in your lane means the lane is about to end. Traffic in it moves into the lane the arrow points to. Signal, check your mirror and your blind spot, and merge before the lane runs out, not at the last car length.
“Lane Reduction—a gradual narrowing of the travel pavement (taper) through physical construction or pavement markings at which traffic in the lane being eliminated must merge into the adjacent through lane and continue in the same direction of travel.”
Question 3 of 10 · Flooding and high water
The answer is B: Turn around and find another route.
Water across the road means turn around and find another route. You cannot see how deep it is, or whether the road under it is still there. Even shallow water can stall the engine or lift the car. Going slowly does not make it safe.
“Flooded roadways—Do not drive through large bodies of standing water on a road. If you see a flooded roadway, find another route to get to your destination.”
Question 4 of 10 · Pavement markings
The answer is C: A crosswalk.
Wide white stripes across the road are a crosswalk, the same as two plain lines. Both mark where people cross, so yield to anyone in it and never stop your car on it. The stripes are used where the crossing needs to stand out more.
“Crosswalk markings are classified as either transverse line or high-visibility. Transverse crosswalk markings consist of two transverse lines. High-visibility markings consist of longitudinal lines parallel to traffic flow with or without transverse lines.”
Question 5 of 10 · Emergency vehicles and the Move Over law
The answer is B: Move over to the left lane.
Move a lane away from a vehicle stopped on the shoulder with its lights flashing, whenever you can do it safely. That puts a whole lane between you and whoever is working there. Slowing down alone is for when no lane is open. In most states the law covers a tow truck like this one as well as police, fire and ambulance.
“When approaching a stationary emergency vehicle with flashing emergency signal lights (hazard lights), move over and slow down.”
Question 6 of 10 · Stopping distance and braking
The answer is C: Ease up, then press again.
A locked wheel slides, and a sliding tire cannot steer or grip well. Without anti-lock brakes, ease up the moment a wheel locks, then press again, as often as it takes. Many handbooks call this pumping the brakes. Anti-lock brakes do it for you, which is why you press and hold there.
“If your vehicle is not equipped with ABS, refer to your vehicle’s owner’s manual for proper braking procedure.”
Question 7 of 10 · Regulatory signs
The answer is B: A full stop, then go when the way is clear.
A stop sign means a complete stop, every time, even on an empty road. Your wheels have to stop turning before you look both ways and go. Slowing to a crawl and rolling through is against the law, even when nothing is coming.
“When it is determined that a full stop is always required on an approach to an intersection, a STOP (R1-1) sign (see Figure 2B-1) shall be used.”
Question 8 of 10 · Alcohol, drugs and DUI
The answer is A: You already agreed to a chemical test.
By accepting your license, you agreed in advance to a chemical test if an officer has reason to think you are impaired. The test is of your breath, blood or urine, and the officer's lawful request is enough. The rule is the law of the state you are driving in, not the one that issued your license.
“You are required to take a BAC test if asked by a police officer due to [State/Province/Territory] implied consent law. [State/ Province/ Territory] implied consent law is based on the principle that when you get your driver's license, you have implicitly consented to a lawfully requested test to determine the alcohol content of your blood, breath, urine, or other bodily substance if suspected of impaired driving.”
Question 9 of 10 · Rain, fog and slick roads
The answer is B: Yes. The tires can slide in a turn.
A wet road gives your tires less grip, and they need grip to turn as well as to stop. A turn taken at dry-road speed can slide the car just as a hard stop can. Slow down before a curve, not in it.
“Slippery roads—Reduce speed at the first sign of rain, snow, sleet, or ice. When the roadway is slippery, your tires do not grip as well. It will take longer to stop, and it will be harder to turn without skidding. Always reduce your speed if the road is wet or covered with snow or ice.”
Question 10 of 10 · Right-of-way
The answer is A: traffic coming toward you
Any left turn crosses the oncoming lane, so you yield to traffic coming toward you, with or without an intersection. Wait for a gap big enough to clear the lane without making anyone brake. Check for anyone walking across the driveway before you turn in.
“drivers in the opposing traffic lane when you are making a left turn;”
These 10 questions are from the DMV Champ app’s practice set, last updated October 23, 2026. Spot a mistake in a question? Email us.
6
You need 34 of the 40 right.
The test has 40 questions, and you can miss up to 6 before you fail.
“The knowledge test consists of 40 questions; you can miss up to six (6) questions before failing the test.”
DMV Champ uses the same format for Virginia.
The youngest you can be is 14 and a half.
“Driver Training Permits (DT) allow anyone 14 1/2 and under 17 years of age to attend any public school or private driver training program.”
If you fail, you wait 3 days before you can take the test again.
“IF YOU FAIL A KNOWLEDGE TEST, YOU MUST WAIT THREE (3) DAYS TO RETEST.”
Permits are issued through your county sheriff’s driver’s license office.
“Idaho driver’s licenses, ID cards, and instruction permits are issued through the county sheriff’s driver’s license offices.”
You can take the test in 11 languages, including English, Spanish, Arabic and Chinese, or in American Sign Language.
“The knowledge test is available in English, Arabic, Chinese, Farsi, French, Korean, Russian, Serbo-Croatian, Spanish, Swahili, Vietnamese, and American Sign Language (ASL).”
Test simulator
DMV Champ teaches every question with its explanation, then checks you with 5 simulated tests of 40 questions, graded against the 34-correct passing score. 36 topics in Idaho: the 34 every state tests, plus winter driving and flooding, because the Idaho handbook teaches them.
Download on the App Store