Free Iowa DMV Practice Test 2026
These sample questions come from the same bank we use for full practice tests, and each one is drawn from the official Iowa driver handbook. Every answer explains why it is right — and why the tempting wrong answer is wrong, which is usually where the score is actually lost. For the current length and passing score of the Iowa Department of Transportation test, check the agency directly.
We have not confirmed the current question count for this state against an official source, so we do not state one here. Confirm it with the Iowa Department of Transportation before test day.
115 practice questions available for Iowa.
5 sample questions with answers
Signs & Signals
1. What color are bicycle boxes at signalized intersections?
- Green
- Yellow
- White
Correct answer: Green
Why: The handbook specifically states that bicycle boxes are solid green and have an image of a bicyclist. This is a visual identification rule that drivers must memorize.
Right-of-Way Rules
2. You want to turn left at an intersection. Oncoming traffic is going straight. What should you do?
- Yield to the oncoming traffic going straight
- Proceed with your left turn since you were there first
- Turn left quickly before the oncoming traffic reaches you
Correct answer: Yield to the oncoming traffic going straight
Why: Drivers turning left must yield to oncoming cars that are going straight ahead. This is a fundamental right-of-way rule at intersections.
Speed & Following Distance
3. According to forward collision warning systems, how much warning time should you expect before a collision when driving at 25 mph?
- 3 seconds
- 4 seconds
- 5 seconds
Correct answer: 4 seconds
Why: At 25 mph, which falls in the 18-50 mph range, forward collision warning systems provide 4 seconds of warning time before a potential collision.
Parking Rules
4. What does a constant tone from parking sensors mean?
- The vehicle is close to an object
- The sensors have detected multiple objects
- The vehicle is at a safe distance from objects
Correct answer: The vehicle is close to an object
Why: The handbook clearly states that a constant tone means the vehicle is close to an object, which is the final warning level before potential contact.
Sharing the Road
5. What is the main purpose of bicycle boxes at signalized intersections?
- To allow bicyclists a safe way to turn
- To provide a waiting area for bicycles during red lights
- To separate bicycles from pedestrians in crosswalks
Correct answer: To allow bicyclists a safe way to turn
Why: The handbook explains that bicycle boxes are installed to allow bicyclists a safe way to turn at signalized intersections. This is about protecting vulnerable road users during turning movements.
What's on the Iowa knowledge test
The Iowa test draws on 12 subject areas. Our question bank covers all of them with 115 active questions written from the official handbook, so practice matches the range of what you can be asked rather than a narrow slice of it.
- Signs & Signals
- Regulatory, warning, and guide signs. Traffic signal phases and meaning.
- Right-of-Way Rules
- Who goes first at intersections, ramps, crosswalks, emergency vehicles.
- Alcohol & Drugs
- BAC limits, implied consent, zero tolerance, prescription drugs.
- Speed & Following Distance
- Posted limits, basic-speed law, following distance, stopping distance.
- Parking Rules
- Curb colors, hill parking, restricted zones, towing.
- Sharing the Road
- Bicycles, motorcycles, pedestrians, large trucks, school buses.
- License & Registration
- License classes, age requirements, registration, insurance.
- Emergencies & Collisions
- Brake failure, skids, what to do at a collision, reporting.
- Lane Usage
- Passing, lane changes, HOV/carpool, turn lanes, two-way left turn.
- Signaling & Turning
- Hand signals, turn signals, U-turns, three-point turns.
- Hazards & Defensive Driving
- Distractions, fatigue, road rage, blind spots, scanning.
- Special Conditions
- Night, fog, rain, snow, construction zones, school zones.
DLStudy is an independent study tool and is not affiliated with the Iowa Department of Transportation. Questions are written from the official handbook, not copied from the real exam.