Hydroplaning is most likely to occur when:

Driving fast on a wet road, mainly with worn tires

Driving slowly through deep, soft snow on a hill

Driving on dry pavement on a very hot day

Braking gently on an icy road in the cold

A long train has just passed a crossing that has two sets of tracks. Before you cross, you should:

Look for a second train on the other track

Go at once, because the train has cleared the road

Cross as soon as the gates begin to rise

Honk to warn any train and then cross quickly

Total stopping distance is made up of:

Perception, reaction, and braking distance

Braking distance plus one car length

Reaction distance and braking distance only

Perception distance and braking distance

Free Idaho DMV Practice Permit Test - Practice Test 4 2026

25 questions85% to passExplanations includedFree

40Real test questions

85%Pass score

This Practice Test 4 is modeled on the Division of Motor Vehicles (DMV) written knowledge exam, which has 40 questions; to pass you need 34 of 40 correct (85%). These 25 questions rotate through traffic laws, road signs, and right-of-way - the core topics the DMV tests most heavily. Every question includes an explanation, so you learn the rule behind each answer - not just whether you got it right.

Question 1 of 25

If your headlights go out at night while driving, you should:

Tip: Press 1-4 to select, Enter to submit, F to flag

Inside this test

What's on the Idaho Practice Test 4

The real Idaho knowledge test has 40 questions, and to pass you need 34 of 40 correct (85%). Practice Test 4 is a 25-question set drawn from 49 questions, scored against a practice target of 85%.

Topics in this test's question pool

Road signs 15
Safe driving 12
Traffic laws 9
Right of way 5
Vehicle equipment 3
Parking 2
Emergencies 2
Alcohol & drugs 1

49 questions in the pool, 8 of them written specifically for Idaho. Each attempt shows 25 in a new order.

Sample questions from this test, with answers

Want to test yourself first? Take the test above before reading these. Every answer below is checked against the source shown.

1. When you parallel park on an Idaho street, your car may be no farther from the curb than:
- A. 18 inches (correct)
- B. 6 inches
- C. 12 inches
- D. 24 inches
Why: Idaho requires you to park parallel to the curb or road edge and within 18 inches of it, facing the same way as traffic on that side of the road.
Source: official Idaho driver handbook, p.80 (PDF p.80), Parking
2. Before getting licensed, an Idaho permit holder must complete how many hours of supervised driving?
- A. 50 hours, including 10 at night (correct)
- B. 20 hours, including 5 at night
- C. 40 hours, including 10 at night
- D. 100 hours, including 20 at night
Why: Over at least six months, an Idaho permit holder must log at least 50 hours of supervised driving, 10 of them during darkness.
Source: official Idaho driver handbook, PDF p.19, 'Graduated Driver's License (GDL) Program'
3. This yellow diamond sign with a curved arrow warns of:
- A. A U-turn area ahead
- B. A curve in the road ahead (correct)
- C. A side road ahead
- D. Traffic merging from the right
Why: A yellow diamond warning sign with a curved arrow warns of a curve ahead. Reduce speed before the curve; an advisory speed may be posted below the sign.
Source: Federal MUTCD 11th ed. (Dec 2023) 2C.07 Paragraph 02
4. When should you use your vehicle's emergency hazard lights?
- A. When parking briefly in a no-parking zone
- B. When your car is disabled on or near the road (correct)
- C. To thank a driver who let you merge
- D. When you plan to change lanes or make a turn
Why: Hazard lights warn others that your vehicle is stopped, disabled or a hazard. Rules for using them while moving (for example in heavy rain) differ between states, so follow your state handbook.
Source: official Idaho driver handbook
5. At a roundabout, in which direction does traffic flow and who has priority?
- A. Clockwise; traffic in the circle has priority
- B. Counterclockwise; circulating traffic has priority (correct)
- C. Counterclockwise; the larger vehicle has priority
- D. Counterclockwise; entering traffic has priority
Why: In the United States, traffic in a roundabout flows counterclockwise, and vehicles already circulating in the roundabout have the right of way. Entering drivers must yield and merge into a safe gap.
Source: official Idaho driver handbook
6. What is the 'point of no return' when approaching a yellow light?
- A. The moment the light changes from green to yellow
- B. The stop line - once past it you must proceed
- C. The point where you can no longer stop safely (correct)
- D. Exactly 100 feet before the intersection
Why: The 'point of no return' is the position from which stopping safely (without running the light or causing a rear-end collision) becomes impossible. Before this point, slow and stop. After it, proceed through safely.
Source: official Idaho driver handbook

More Idaho facts, the full requirements table and the printable PDF are on the Idaho permit practice test page.

Idaho DMV Test Info

Questions on real test: 40
Passing score: 85%
Correct needed: 34 of 40 correct (85%)
Minimum age: 14½ years old
Testing agency: Division of Motor Vehicles

Official ID DMV Website ↗

More Idaho Tests

Study Tip

Don't just aim to pass this Idaho Practice Test 4 once - keep taking it until you score 85% or higher two or three times in a row. Read the explanation after every question, even the ones you get right, to lock in the rule before your DMV exam.